AIL CAST STEEL GATE, GLOBE & CHECK VALVES. ASME Class mm mm (2-48 ) API 600 API 603 AUDCO INDIA LIMITED ASME B16.

Transcription

1 AIL CAST STEEL GATE, GLOBE & CHECK VALVES ASME Cass mm mm (2-48 ) API 600 API 603 ASME B16.34 AUDCO INDIA LIMITED

2 Gate/Gobe/Check Introduction Vaves to API 600 The AIL Cast Stee Gate, Gobe and Check Vaves have estabished themseves the word over for their quaity, reiabiity and ong service. The vaves are manufactured to the atest internationa designs, using advanced manufacturing techniques and stringent quaity contro checks. The vaves are reguary suppied to major internationa cients incuding oi refining companies and EPC contractors. A wide network of distributors ensures that avaiabiity of AIL vaves anywhere in the word. AUDCO INDIA LIMITED (AIL) is a eading vave manufacturer, with a strong presence in India and overseas. AIL has three manufacturing faciities ocated in Southern India. The main pant is ocated in Manapakkam, Chennai. The two other pants are at Maraimaai Nagar, 40 kiometres south and at Kancheepuram, 70 kiometres west of the main pant. The pants are equipped with modern manufacturing faciities with specia-purpose machines, automatic weding equipment, heat treatment furnaces and testing equipment for tota contro of a manufacturing operations. In-house metaurgica and NDE aboratories, and caibration faciities with modern equipment provide support to ensure the quaity of products manufactured. AIL manufactures a wide variety of industria vaves. The Quaity Management System in a three pants is certified to ISO 9001 System. Tabe of Contents Content Page No. Introduction Manufacturing Program Test / Inspection methods & acceptance criteria Test Pressures for Standard Carbon Stee Vaves Compiance Standards Body / Bonnet Materias API 600 AIL Gate, Gobe & Check Vaves Saient Features...06, 07 Trim Materia Stem Packing Bonnet Gaskets Ordering Information Gate Vaves (C 150, 300 & 600) Gate Vaves (C 900 & 1500) Gobe Vaves (C 150, 300 & 600) Gobe Vaves (C 900 & 1500) Check Vaves (C 150, 300 & 600) Check Vaves (C 900 & 1500) API 603 AIL Stainess Stee Gate Vaves 16 & 17 Saient Features Stainess Stee Gate Vaves (C 150 & 300) ASME B16.34 AIL Gate, Y-Gobe & Check Vaves Saient Features...18, 19 Pr. Sea Bonnet Gate Vaves (C 900, 1500 & 2500) Pr. Sea Bonnet Y-Gobe Vaves (C 1500) Pr. Sea Bonnet Check Vaves (C 900, 1500 & 2500) AIL Cryogenic Vaves 22 & 23 AIL Specia Vaves 24 AIL Vave Accessories 25 Technica Information Pressure-Temperature Ratings... 26, 27 End Fange Dimensions-C 150 & RF Large-size End Fange Dimensions - C 150 & RF 28 End Fange Dimensions-C RF / RTJ End Fange Dimensions-C RF / RTJ End Fange Dimensions-C RF / RTJ Butt-wed end detais and dimensions Cast Stee - Materia Characteristics Reference Charts of Vave Manufacturers 30 Internationa Cientee 31 02

3 AIL Manufacturing Program 603 API 600 & BS 1868 API 600 & BS 1873 API 600 & BS 1414 D E S I G N S T A N D A R D & W A L L T H I C K N E S S ASME B16.34 API O T H E R V A L V E S CRYOGENIC SPECIALS QQuaity Poicy It is the poicy of AUDCO INDIA LIMITED to Adopt recognized standards for quaity systems Maintain a high standard of quaity consistent with customer requirements Compy with the codes and standards or customer specifications, appicabe to the products and services offered End ASME Vave type Conn. Cass 2 21 / Fanged 600 Gate Vaves 900 Boted Bonnet 1500 Fex Wedge 150 Buttwed 300 ends Fanged 600 Gobe Vaves 900 Boted Bonnet 1500 Pug/Ba type 150 Disc Buttwed ends Fanged 600 Check Vaves 900 Boted Cover 1500 Swing type 150 Disc Buttwed 300 ends Gate Vaves 150 Boted Bonnet Fanged 300 Gate Vaves 900 Buttwed Pr. Sea Bonnet 1500 ends Parae Side Disc 2500 Gobe Vaves 900 Buttwed Pr. Sea Bonnet 1500 ends Pug type Disc 2500 Check Vaves 900 Buttwed Pr. Sea Bonnet 1500 ends Swing type Cryogenic 300 Gate Vaves Cryogenic 300 GobeVaves Soft-seated 300 Gate Vaves Live Loaded 300 Gate / Gobe 600 Vaves Introduction

4 Introduction Test / Inspection methods & acceptance criteria Test / Inspection Method Acceptance Criteria Visua Inspection MSS SP55 Chemica Anaysis ASTM E350 Reevant ASTM Mechanica Properties ASTM A370 Reevant ASTM Radiographic Inspection ASME B16.34 ASME B16.34 Magnetic Partice Inspection ASTM E709 ASME B16.34 Liquid Penetrant Inspection ASTM E165 ASME B16.34 Utrasonic Inspection ASTM A388 ASME B16.34 Pressure Testing API 598/BS 6755 Part I API 598/BS 6755 Part I Dimensiona Inspection Vave Standard The pressure containing parts of a vaves are marked with the foundry identification and heat numbers. Vave test certificates provide the correating heat numbers aong with chemica anaysis and mechanica properties of these parts. Test pressures for standard Carbon Stee Vaves Every individua vave manufactured at AIL is inspected and pressure-tested to API 598 / BS 6755 Part I requirements, for which test certificates are provided. ASME Cass Hydrostatic Test Pressure Pneumatic ow pressure in kg/cm 2 (psig) cosure test pressure She Back Seat Cosure in kg/cm 2 (psig) (450) 22 (315) 22 (315) 7 (100) (1125) 57 (815) 57 (815) 7 (100) (2225) 115 (1630) 115 (1630) 7 (100) (3350) 172 (2445) 172 (2445) 7 (100) (5575) 287 (4080) 287 (4080) 7 (100) (9275) 477 (6790) 477 (6790) 7 (100) Low Pressure Test for Swing Check Vaves In addition to the high pressure cosure test, Swing Check Vaves are subjected to ow pressure hydrostatic cosure test at a pressure of 25% of the high pressure cosure test. The duration of the test is the same as that of the high pressure cosure test. 04

5 Compiance Standards Parameter Compiance API 600 Gate Vave API 600 Gobe Vave BS 1873* Check Vave BS 1868* API 603 Gate Vave API 603 ASME B16.34 Gate, Gobe, Check Vaves ASME B16.34 Pressure-Temperature rating ASME B16.34 Face-to-face / End-to-end dimension ASME B16.10 End Fange dimensions ASME B16.5** Butt-wed End dimensions ASME B16.25 Vave Inspection & Testing API 598 The vaves aso compy with appicabe BS specifications. * She wa thickness as per API 600 ** For vaves arger than 24 (600mm), the fange driing sha be as per ASME B16.47 Series A (MSS SP 44) or Series B (API 605). RTJ fanges are offered as optiona for Cass 600 and above. Body / Bonnet Materias AIL Cast Stee Gate, Gobe and Check Vaves are offered in a variety of body and bonnet materias to suit different requirements. These materias incude Carbon Stee (standard), Aoy Stees and Stainess Stees. For other materias of construction, refer to AIL Internationa Marketing Department. Materia Cassification ASTM Specification Working temperature* Carbon Stee ASTM A216 Gr. WCB C to C (-20 0 F to F) 1 1 /4 Cr - 1 /2 Mo ASTM A217 Gr. WC C to C (-20 0 F to F) 2 1 /4 Cr - 1 Mo ASTM A217 Gr. WC C to C (-20 0 F to F) 5 Cr - 1 /2 Mo ASTM A217 Gr. C C to C (-20 0 F to F) 9 Cr - 1 Mo ASTM A217 Gr. C C to C (-20 0 F to F) 9 Cr - 1 Mo - 1 /4 V ASTM A217 Gr. C12A C to C (-20 0 F to F) Low-temperature Stee ASTM A352 Gr. LCB/LCC C to C (-50 0 F to F) Austenitic Stainess Stee 18-8 (Type 304) ASTM A351 Gr. CF C to C ( F to F) Austenitic Stainess Stee 16Cr - 12Ni - 2 Mo (Type 316) ASTM A351 Gr. CF8M C to C ( F to F) Other materias such as ASTM A351 Gr. CF3 and ASTM A351 Gr. CF3M are aso offered. AIL has the distinction of having obtained a number of internationa approvas. Notabe among these are : ISO 9001-certified Quaity Management System Certified to use CE marking for suppy to the European Union Specific company approvas from internationa oi majors and EPC contractors * ASME pressure-temperature ratings on pages 26 & 27. Boting & trim materias wi infuence the working temperature. Introduction 05

6 AIL Vaves to API 600 API 600 AIL Gate, Gobe & Check Vaves Boted Bonnet / Cover design The API 600 famiy of AIL Gate, Gobe and Swing Check Vaves is exceptionay sturdy, rugged and durabe, with a reputation for quaity, integrity and ong service. They are designed for tight seaing and ease of operation. The vaves are avaiabe with fanged ends or butt-wed ends, in pressure ratings from ASME Cass 150 to Cass 1500, and in a variety of materias of construction. Gate Vaves are of fexibe wedge, outside screwand-yoke and boted-bonnet construction. The vaves conform to API 600. Gobe Vaves feature a ba-type disc, outside screwand-yoke and boted-bonnet construction. They conform to BS 1873 and aso meet the genera requirements of API 600, incuding she wa thickness and stuffing box dimensions. Check Vaves are of swing-type and boted-cover construction. They conform to BS 1868 and aso meet the genera requirements of API 600, incuding she wa thickness. Body and Bonnet The body and bonnet are cast with uniform section and generous radius fiets to prevent stress concentration. The castings are precision-machined for high performance. Body-Bonnet Joint The body-bonnet joint for Cass 150 gate vaves is ova in shape, whie for Cass 300 and for gobe vaves, this joint is circuar in shape. In 2 (50mm) vaves, the body-bonnet joint has a square configuration. Gate vaves of Cass 150 rating have a fatface joint with a graphite gasket having metaic inserts. Those of Cass 300 rating have a mae-femae type joint with a spiraywound gasket. Gate vaves of Cass 600 rating and above have a Ring Type Joint (RTJ). Gobe and Check vaves in Cass 150 and 300 ratings have a mae-femae type joint with a spiray-wound gasket. Those of Cass 600 rating and above have an RTJ. Square Joint Circuar Joint The gate vave body has a straight through port without recesses except at the seat area. This ensures minimum turbuence, erosion and resistance to fow. Long integra guide ribs in the body match with guide sots in the wedge for accurate aignment and guidance. Bonnet castings are of one-piece design, where the yoke is integra with the bonnet for gate vaves of sizes up to 12 (300mm). This ensures accurate aignment of stem and a smooth operation. Back Seat In AIL gate and gobe vaves, a precisionmachined back-seat bush is threaded in the bonnet and is secured by a tab-wed. tab tab wed In gobe vaves of arger sizes and for higher pressure casses of ASME Cass 900 and above, the interna part of the body is machined to provide continuous guiding of the disc from the open to the cosed position. The check vave body provides a fu port without pockets from inet to the vave seat. On the downstream side, the body has generous proportions to faciitate fu swing of the disc to reduce disc erosion and fow resistance. Fexibe Wedge AIL gate vaves feature a one-piece cast fexibe wedge that minimises stress concentration. Wedge fexibiity ensures tight seating over a wide range of differentia pressures and temperatures. It aso adjusts to sight misaignments caused by pipeine defections and therma deformation. The stem-to-wedge thrust is appied cose to the wedge centre. This reduces atera stem oading and provides for more accurate wedge movement. 06

7 Ba-type Disc AIL gobe vaves feature a ba-type disc that provides a fine grain surface on the taper seat. For severe services that demand hard-faced seats, a pug-type disc is provided. Swing-type Disc Assemby The one-piece construction is securey fastened to the hinge by means of a ock nut and pin. The disc is free to rotate to avoid ocaized wear. The hinge pin offers exceent wear resistance properties. Seat Ring AIL gate vaves and check vaves feature a sea-weded seat ring that offers a eakproof design as it eiminates the eakage path betwen the seat ring and the body. This design is superior to screwed seats which can oosen up due to temperature fuctuations, corrosion or vibration and resut in eakage. For 50mm gate vaves, the seat ring is fared into the body, whie sea weding is optiona. AIL gobe vaves feature a shouder type, threaded body seat ring which has a wide taper area that provides for ampe seating. Sots on the seat ring aow easy in-situ remova for servicing. Threaded seat rings are secured by a tab-wed. Weded seat rings are aso avaibe in AIL Gobe Vaves Yoke Seeve and Yoke Bush Cast in austenitic, copper-free ductie iron aoy to provide resistance to heat, corrosion and wear, the Yoke Seeve in gate vaves features a ong thread engagement that assures accurate aignment of the stem. Moreover, it can be removed without repacing the bonnet. In gate vaves of sizes 150mm and higher in Cass 600 rating and above, the yoke seeve is mounted on thrust bearings to faciitate easy operation. The Yoke Bush of gobe vaves is aso made from ductie iron aoy, and has a ong thread engagement for accurate stem aignment. In Cass 900 and 1500 ratings, the vaves have a yoke seeve to faciitate smooth operation. Stuffing Box The machined stuffing box chamber with a fat bottom aows correct seaing of the gand packing. Surface finish is controed to required imits, to ensure ow-emission performance. Stuffing boxes are provided with five numbers of gand packing to achieve correct compression of a packings and to ensure tight seaing. Vaves in Cass 300 rating and above feature a provision for a antern ring arrangement for conditions that demand that there be no eakage of service fuid to the atmosphere. The antern ring has a eakoff pug which aows connection for iquid or grease sea. See page 25 for more detais on antern ring. AIL Vaves to API 600 Stem AIL gate and gobe vaves feature a stem of one-piece construction, ACME threaded and precision-machined with poished surfaces to reduce friction, minimise eakage and extend stem ife. In gate vaves, the heavy forged T-head engages with the T-sot in the wedge. The stem aso has an integra sef-adjusting radia back-seat shouder that matches with the back-seat bush in the bonnet. In gobe vaves, the stem is hed to the disc by a stem nut that permits the disc to swive. This free-foating design ensures uniform seating. Fange Driing and Facing finish The standard range of AIL fanged vaves in sizes of up to 24 (600mm) is finished with end-fanges faced, dried and spot-faced (or backfaced) to ASME B16.5 Raised Face (RF). Fanges in vaves of sizes arger than 24 (600mm) are dried as per ASME B16.47 Series A (MSS SP 44) or Series B (API 605). Vaves in ASME Cass 600 and above are offered with RTJ end fanges on request. The standard finish offered on the raised faces is microns in Ra (AARH) Spira Serration. Other finishes can be offered on request. 07

8 AIL Vaves to API 600 Trim Materia AIL API 600 Trim No. Trim No. Stem Materia of Construction Seat Surface Wedge / Disc Seating Surface Back Seat % Cr. 13% Cr. 13% Cr. 13% Cr. 2 2 SS 316 SS 304 SS 304 SS % Cr. HF* HF* 13% Cr % Cr. HF* 13% Cr. 13% Cr. 9 9 Mone Mone Mone Mone SS 316 SS 316 SS 316 SS SS 316 HF* SS 316 SS SS 316 HF* HF* SS Trim No. 16 wi feature a back-seat of either SS 316 or SS HF* * HF : Hard-faced with Steite #6 (Co-Cr-W aoy) or equivaent. Trim 12 vaves compy with NACE MR0175 for hardness and heat treatment requirements of wetted components. Trim 8 vaves can aso be offered for NACE service on request. Bonnet Gaskets Vave Type ASME Cass Typica Optiona Gate Gobe Graphite Gasket with Spiray-wound SS 304 / SS 316 insert SS 316 with PTFE fier Spiray-wound SS 316 with Spiray-wound SS 304 with Graphite fier Graphite fier Spiray-wound SS 304 / SS 316 with PTFE fier Spiray-wound SS 304 with Graphite fier Octagona Ring Type (RTJ) meta gasket in Soft Iron Stem Packing Construction Die-formed fexibe Graphite rings with braided Graphite top & bottom rings* Spiray-wound SS 316 with Spiray-wound SS 304 with Graphite fier Graphite fier Spiray-wound SS 304 / SS 316 with PTFE fier Octagona Ring Type (RTJ) Spiray-wound SS 304 with meta gasket in Soft Iron Graphite fier Octagona Ring Type (RTJ) meta gasket in SS 304 / SS 316 Octagona Ring Type (RTJ) Octagona Ring Type (RTJ) meta gasket in Soft Iron meta gasket in SS 304 / SS 316 Octagona Ring Type (RTJ) Octagona Ring Type (RTJ) meta gasket in Soft Iron meta gasket in SS 304 / SS 316 Max. temp C ( F) Braided PTFE C (400 0 F) * AIL standard Octagona Ring Type (RTJ) meta gasket in SS 304 / SS 316 Octagona Ring Type (RTJ) Octagona Ring Type (RTJ) meta gasket in Soft Iron meta gasket in SS 304 / SS 316 Octagona Ring Type (RTJ) Octagona Ring Type (RTJ) meta gasket in Soft Iron meta gasket in SS 304 / SS Spiray-wound SS 316 with Spiray-wound SS 304 with Graphite fier Graphite fier Spiray-wound SS 304 / 300 SS 316 with PTFE fier Octagona Ring Type (RTJ) 600 Spiray-wound SS 304 with meta gasket in Soft Iron Check Graphite fier Octagona Ring Type (RTJ) meta gasket in SS 304 / SS 316 Octagona Ring Type (RTJ) Octagona Ring Type (RTJ) 900 meta gasket in Soft Iron meta gasket in SS 304 / SS 316 Octagona Ring Type (RTJ) Octagona Ring Type (RTJ) 1500 meta gasket in Soft Iron meta gasket in SS 304 / SS 316

9 Ordering Information Vave Size mm (in) 50 (2 ) 65 (2 1 /2 ) 80 (3 ) 100 (4 ) 125 (5 ) 150 (6 ) 200 (8 ) 250 (10 ) 300 (12 ) 350 (14 ) 400 (16 ) 450 (18 ) 500 (20 ) 600 (24 ) 700 (28 ) 750 (30 ) 850 (34 ) 900 (36 ) 1050 (42 ) 1200 (48 ) Vave Type 1 Gate 4 Gobe 7 Check As a standard, AIL Vaves are made in Carbon Stee to ASTM A216 Gr. WCB. For vaves in other materias and for accesories ike gear operation and eectrica actuators, suffix suitabe abbreviations to the above ordering code such as : WC6 for ASTM A217 Gr. WC6 WC9 for ASTM A217 Gr. WC9 LCB for ASTM A352 Gr. LCB LCC for ASTM A352 Gr. LCC C5 for ASTM A217 Gr. C5 C12 for ASTM A217 Gr. C12 ASME Pr. Cass 1 Cass Cass Cass Cass 900 A Cass 1500 End Connection 3 Fanged RF 5 Fanged RTJ 6 Butt-wed GO for Gear Operation LA for Locking Arrangement E for Eectrica Actuator EB for Extended Bonnet (Cryogenic vaves) ES for Extension Spinde Trim Number Refer tabe on Trim Materias on page 8 AIL Vaves to API

10 AIL Vaves to API 600 Gate Vaves - ASME Casses 150, 300 & 600 Figure Numbers 113-8, & Standard Materia of Construction Dimensions (in mm) & Weights (in kg) Vave Size BUTT-WELD END FLANGED END S. No. Description Materia 01 Body ASTM A216 Gr. WCB 02 Body Seat Ring ASTM A105 + HF* 03 Wedge ASTM A216 Gr. WCB + 13% Cr. Stee 04 Stem ASTM A182 Gr. F6a Gasket - C.150 ASTM A Spiray-wound SS 304 Gasket - C.300 & 600 with graphite fier 06 Bonnet ASTM A216 Gr. WCB 07 Stud ASTM A193 Gr. B7 08 Stud Nut ASTM A194 Gr. 2H 09 Back-seat Bush 13% Cr. Stee 10 Packing Graphite with braided end rings 11 Gand Stee 12 Gand Fange ASTM A105 / ASTM A216 Gr. WCB 13 Eye Bot Cr. - Mo Stee 14 Eye Bot Nut ASTM A194 Gr. 2H 15 Groove Pin Stee 16 Yoke Seeve (Stem Nut) ASTM A439 Type D2 17 Grease Fitting Stee 18 Retainer Nut Stee / Ductie Iron / 19 Handwhee Maeabe Iron 20 Handwhee Nut Namepate SS 304 * HF - Hard-Faced with Steite #6 or equivaent For other body / bonnet materias, refer page 5 Cass 150 Cass 300 Cass 600 A Approx.Wt. A Approx.Wt. A Approx.Wt. B C B C B C F. B/W F. B/W F. B/W F. B/W F. B/W F. B/W (2 ) (2 1 /2 ) (3 ) (4 ) (5 ) (6 ) (8 ) (10 ) (12 ) (14 ) (16 ) (18 ) (20 ) (24 ) (28 ) (30 ) (34 ) (36 ) * (42 ) * (48 ) * F. - Fanged ; B/W - Butt-wed. * Depends on fange dimensions

11 Gate Vaves - ASME Casses 900 & 1500 Figure Numbers & 1A3-8 FLANGED END Standard Materia of Construction S. No. Description Materia 01 Body ASTM A216 Gr. WCB 02 Body Seat Ring ASTM A105 + HF* 03 Wedge ASTM A216 Gr. WCB + 13% Cr. Stee 04 Stem ASTM A182 Gr. F6a 05 Gasket RTJ Soft Iron 06 Bonnet ASTM A216 Gr. WCB 07 Stud ASTM A193 Gr. B7 08 Stud Nut ASTM A194 Gr. 2H 09 Back-seat Bush 13% Cr. Stee 10 Packing Graphite with braided end rings 11 Gand 13% Cr. Stee 12 Gand Fange ASTM A105 / ASTM A216 Gr. WCB 13 Eye Bot 13% Cr. Stee 14 Eye Bot Nut ASTM A194 Gr. 2H 15 Yoke Seeve (Stem Nut) ASTM A439 Type D2 16 Bearing Stee 17 Yoke Cap Ductie Iron 18 Screw Stee 19 Handwhee Stee / Ductie Iron / 20 Handwhee Nut Maeabe Iron Namepate SS 304 * HF - Hard-Faced with Steite #6 or equivaent For other body / bonnet materias, refer page 5 AIL Vaves to API 600 GEAR UNIT ASSEMBLY BUTT-WELD END Dimensions (in mm) & Weights (in kg) Cass 900 Cass 1500 Vave A Approx.Wt. A Approx.Wt. Size B C B C F. B/W F. B/W F. B/W F. B/W 50 (2 ) (3 ) (4 ) (6 ) (8 ) (10 ) (12 ) F. - Fanged ; B/W - Butt-wed 11

12 AIL Vaves to API 600 Gobe Vaves - ASME Cass 150, 300 & 600 Figure Numbers 413-8, & FLANGED END Standard Materia of Construction S. No. Description Materia 01 Body ASTM A216 Gr. WCB 02 Body Seat Ring ASTM A182 Gr. F6a+HF 03 Disc ASTM A216 Gr. WCB + 13% Cr. Stee 04 Disc Washer 13% Cr. Stee 05 Stem ASTM A182 Gr. F6a 06 Disc Stem Nut 13% Cr. Stee 07 Gasket ASTM A Bonnet ASTM A216 Gr. WCB 09 Stud ASTM A193 Gr. B7 10 Stud Nut ASTM A194 Gr. 2H 11 Back-seat Bush 13% Cr. Stee 12 Packing Graphite with braided end rings 13 Gand 13% Cr. Stee 14 Gand Fange ASTM A105 / ASTM A216 Gr. WCB 15 Eye Bot Cr. - Mo Stee 16 Eye Bot Nut ASTM A194 Gr. 2H 17 Groove Pin Stee 18 Yoke Bush ASTM A439 Type D2 19 Handwhee Stee / Ductie Iron / Maeabe Iron 20 Washer Stee 21 Handwhee Nut ASTM A563 Gr. B Namepate SS 304 * HF - Hard-Faced with Steite #6 or equivaent For other body / bonnet materias, refer page 5 BUTT-WELD END Dimensions (in mm) & Weights (in kg) Vave Cass 150 Cass 300 Cass 600 A Approx.Wt. A Approx.Wt. A Approx.Wt. B C B C B C Size F. B/W F. B/W F. B/W F. B/W F. B/W F. B/W 50 (2 ) (2 1 /2 ) (3 ) (4 ) (6 ) (8 ) (10 ) (12 ) F. - Fanged ; B/W - Butt-wed

13 Gobe Vaves - ASME Cass 900 & 1500 Figure Numbers & 4A3-8 Standard Materia of Construction S. No. Description Materia 01 Body ASTM A216 Gr. WCB 02 Body Seat Integra Steite #6 or eq. 03 Disc ASTM A216 Gr. WCB + 13% Cr. Stee 04 Disc Washer 13% Cr. Stee 05 Stem ASTM A182 Gr. F6a 06 Disc Stem Nut 13% Cr. Stee 07 Gasket RTJ SS Bonnet ASTM A216 Gr. WCB 09 Stud ASTM A193 Gr. B7 10 Stud Nut ASTM A194 Gr. 2H 11 Back-seat Bush 13% Cr. Stee 12 Spacer 13% Cr. Stee 13 Packing Graphite with braided end rings 14 Eye Bot ASTM A193 Gr. B7 15 Eye Bot Nut ASTM A194 Gr. 2H 16 Gand 13% Cr. Stee 17 Handwhee Stee / Ductie Iron / 18 Handwhee Nut 19 Retainer Nut Maeabe Iron 20 Yoke Seeve ASTM A439 Type D2 21 Bearing Stee Namepate SS 304 * HF - Hard-Faced with Steite #6 or equivaent For other body / bonnet materias, refer page 5 AIL Vaves to API 600 FLANGED END Dimensions (in mm) & Weights (in kg) Vave Cass 900 Cass 1500 A Approx.Wt. A Approx.Wt. B C B C Size F. B/W F. B/W F. B/W F. B/W 50 (2 ) (3 ) 100 (4 ) 150 (6 ) F. - Fanged ; B/W - Butt-wed 13

14 ta AIL Vaves to API 600 Swing Check Vaves - ASME Cass 150, 300 & 600 Figure Numbers 713-8, & FLANGED END Standard Materia of Construction S. No. Description Materia 01 Body ASTM A216 Gr. WCB 02 Body Seat Ring ASTM A105 + HF* 03 Disc ASTM A216 Gr. WCB + 13% Cr. Stee 04 Hinge ASTM A216 Gr. WCB 05 Disc Washer 13% Cr. Stee 06 Disc Nut SS Disc Nut Pin 13% Cr. Stee 08 Hinge Pin 13% Cr. Stee 09 Gasket ASTM A Cover ASTM A216 Gr. WCB 11 Stud ASTM A193 Gr. B7 12 Stud Nut ASTM A194 Gr. 2H Hinge Pin Cover ASTM A105 Hinge Pin Cover Bot ASTM A193 Gr. B7 Namepate SS 304 * HF - Hard-Faced with Steite #6 or equivaent For other body / cover materias, refer page 5 COVER FOR 3 VALVE (CLASS 600) COVER & EYEBOLT ARRANGEMENT FOR 12 VALVE (CLASS 150) t COVER & EYEBOLT ARRANGEMENT FOR VALVES 14 & ABOVE (CLASS 150), VALVES 10 & ABOVE (CLASS 300) & VALVES 4 & ABOVE (CLASS 600) BUTT-WELD END Dimensions (in mm) & Weights (in kg) Vave Cass 150 Cass 300 Cass 600 A Approx.Wt. A Approx.Wt. A Approx.Wt. B B B Size F. B/W F. B/W F. B/W F. B/W F. B/W F. B/W 50 (2 ) 65 (2 1 /2 ) 80 (3 ) 100 (4 ) 150 (6 ) 200 (8 ) 250 (10 ) 300 (12 ) 350 (14 ) 400 (16 ) 450 (18 ) 500 (20 ) 600 (24 ) F. - Fanged ; B/W - Butt-wed

15 Swing Check Vaves - ASME Cass 900 & 1500 Figure Numbers & 7A3-8 FLANGED END Standard Materia of Construction S. No. Description Materia 01 Body ASTM A216 Gr. WCB 02 Body Seat Ring ASTM A105N + + HF* 03 Disc ASTM A216 Gr. WCB + 13% Cr. Stee 04 Hinge ASTM A216 Gr. WCB 05 Hinge Pin 13% Cr. Stee 06 Disc Washer 13% Cr. Stee 07 Disc Nut SS Disc Nut Pin SS Gasket RTJ Soft Iron 10 Cover ASTM A216 Gr. WCB 11 Stud ASTM A193 Gr. B7 12 Stud Nut ASTM A194 Gr. 2H Namepate SS 304 * HF - Hard-Faced with Steite #6 or equivaent For other body / cover materias, refer page 5 AIL Vaves to API 600 BUTT-WELD END Dimensions (in mm) & Weights (in kg) Vave Cass 900 Cass 1500 A B Approx.Wt. A B Approx.Wt. Size F. B/W F. B/W F. B/W F. B/W 50 (2 ) 65 (2 1 /2 ) 80 (3 ) 100 (4 ) 150 (6 ) 200 (8 ) 250 (10 ) 300 (12 ) F. - Fanged ; B/W - Butt-wed 15

16 AIL Vaves to API 603 API 603 AIL Stainess Stee Gate Vaves Boted Bonnet design The API 603 famiy of AIL Stainess Stee Gate Vaves is an economic aternative to API 600 Stainess Stee Gate Vaves. They are avaiabe in fanged construction and in pressure ratings of ASME Cass 150 and Cass 300. Gate Vaves are of fexibe wedge,outside screw-andyoke and boted-bonnet construction. Body and Bonnet The body and bonnet are cast with uniform section and generous radius fiets to prevent stress concentration. The castings are precision-machined for high performance. The gate vave body has a straight through port without recesses except at the seat area. This ensures minimum turbuence, erosion and resistance to fow. Long integra guide ribs in the body match with fu-ength guide sots in the wedge fo accurate aignment and guidance. Fexibe Wedge The vaves feature a one-piece cast fexibe wedge that minimises stress concentration. Wedge fexibiity ensures tight seating over a wide range of differentia pressures and temperatures. It aso adjusts to sight misaignments caused by pipeine defections and therma deformation. The stem-to-wedge thrust is appied cose to the wedge centre. This reduces atera stem oading and provides for more accurate wedge movement. Ordering Information Vave Size mm (in) Vave Type ASME Pr. Cass End Connection Trim 50 (2 ) 80 (3 ) 100 (4 ) 150 (6 ) 200 (8 ) 250 (10 ) 300 (12 ) 3 Gate - API Cass Cass 300 As a standard, API 603 Gate Vaves are made of Stainess Stee ASTM A351 Grade CF8M. For accesories ike gear operation and eectrica actuators, suffix suitabe abbreviations to the above ordering code such as : GO for Gear Operation LA for Locking Arrangement E for Eectrica Actuator 3 Fanged RF Refer tabe on Trim Materias on page 8 16

17 Stainess Stee Gate Vaves - ASME Cass 150 & 300 Figure Numbers & Standard Materia of Construction S. No. Description Materia 01 Body ASTM A351 Gr. CF8M 02 Wedge ASTM A351 Gr. CF8M 03 Stem ASTM A182 Gr. F316 Gasket - C.150 Graphite with SS 316 insert 04 Spiray-wound SS 304 Gasket - C.300 with graphite fier 05 Bonnet ASTM A351 Gr. CF8M 06 Stud ASTM A193 Gr. B8 C.2 07 Stud Nut ASTM A194 Gr Spacer SS Packing Graphite with braided end rings 10 Eye Bot SS Eye Bot Nut ASTM A194 Gr Gand SS Gand Fange SS Yoke Seeve (Stem Nut) ASTM A439 Type D2 15 Grease Fitting SS Retainer Nut SS Handwhee ASTM A536 Gr / ASTM A602 Gr. M Handwhee Nut SS 304 Namepate SS 304 * HF - Hard-Faced with Steite #6 or equivaent AIL Vaves to API 603 Dimensions (in mm) & Weights (in kg) Vave Cass 150 Cass 300 Size A B C Approx.Wt. A B C Approx.Wt. 50 (2 ) (3 ) (4 ) (6 ) (8 ) (10 ) (12 ) F. - Fanged ; B/W - Butt-wed 17

18 AIL Vaves to ASME B16.34 ASME B16.34 AIL Gate, Y-Gobe & Check Vaves Pressure Sea Bonnet design The ASME B16.34 famiy of AIL Gate, Y-Gobe and Swing Check Vaves features a pressure sea bonnet design for high pressure services. These vaves are extensivey used in high pressure and high temperature steam, oi, gas, chemica and water appications in therma power pants, fertiiser pants, petrochemica pants and refineries. The vaves are avaiabe with butt-wed ends in pressure ratings of Casses 900, 1500 and 2500, and come in carbon stee and aoy stee construction. Gate vaves aso meet the requirements of API 600 Stye A. GATE VALVES Parae Side Disc Mechanism This mechanism consists of two independent discs hed by a disc carrier. An aoy stee spring between the discs provides the initia oading to keep the discs pressed against the body seats. The disc faces are parae to each other and sea on parae seat rings in the body. Seaing takes pace by utiizing the ine pressure to provide tight sea on the downstream seat. As the two discs are independent and parae, opening / cosing torques are significanty ower than comparabe wedge disc designs, thereby minimizing the possibiity of jamming at high temperatures or pressures. When the vave is operated, the discs are aowed to side and rotate over the body seats. This heps wipe out foreign partices from the seat faces. body seat ring spring discs disc carrier Yoke Seeve and Thrust Bearings The yoke seeve is made of noduar Niresist Iron, supported by a set of bearings to reduce friction and the consequent torque required to operate the vaves. Noduar Niresist Iron aso withstands high temperatures. Weather seas, provided in the yoke seeve, protect the bearing area against ingress of dirt and water. Pressure Sea arrangement for body-bonnet joint This pressure sea body-bonnet joint utiizes the ine pressure to create a tight body-bonnet sea. Seaing is achieved by compressing a high-purity graphite gasket between the bonnet and the body retainer ring. Preoaded fasteners provide an initia tight sea at ow ine pressures. At higher pressures, the ine pressure pushes up the bonnet against the gasket, compressing it further and providing a much tighter sea. Trim Both the disc and the seat ring faces are hard-faced with Steite #6 or equivaent. bonnet high-purity graphite gasket Seat Rings Body seat rings are weded to the body to offer a eakproof design as they eiminate the eakage path betwen the seat ring and the body. This design is superior to screwed seats which can oosen up due to temperature fuctuations, corrosion or vibration and resut in eakage. Back-seat The back-seat is in-situ hard-faced with Steite #6 or equivaent. 18 Stem and Gand Packing The vaves feature a stem, made of 13% Cr. Stee - ACME threaded, precision-machined and ground to a high finish to ensure a smooth operation. The high-purity graphite gand packings, used for stem seaing, provide capabiity to withstand high temperatures and pressures, and aso to resist many chemicas. The smooth-finish stuffing box ensures onger ife for the packings. Accessories AIL Vaves can be suppied with accessories such as bypass arrangement, drain pugs, ive-oading and mountings ike extension spindes, foor stands and chain whee. The vaves can aso be suppied with gear units and eectrica actuators.

19 Y-GLOBE VALVES By virtue of their Y-type configuration, AIL Y-Gobe Vaves have a reativey straight fow and a ower pressure drop compared to conventiona gobe vaves. The vaves are suitabe for tight shutoff and throtting in high pressure and high temperature ines. Some of the unique features of AIL Y-Gobe Vaves are : Pressure Sea Bonnet Low operating torque due to use of thrust bearings Non-rotating stem Integray-steited body seats Fuy-guided disc with Steite seating and guiding surface Impactor handwhee in sizes of 6 (150mm) and above SWING CHECK VALVES AIL Swing Check Vaves feature a pressure-sea body-cover joint and sea-weded seat rings. The seating surfaces are hard-faced with Steite #6 or equivaent. Swing-type Disc The disc is of swing-type design and is opened by ine veocity and the resutant pressure. When the fow stops, the disc is cosed by gravity. Seating oad and the resutant tightness are dependent on the back pressure. As the disc is internay hinged, there is no opening in the body of the vave. This ensures high integrity. Instaation AIL Swing Check Vaves are used to prevent the reversa of fow in vertica, horizonta or incined pipeines. These vaves are to be used ony for upward or horizonta fow. Pusating fows, as obtained at the outet of a reciprocating pump, woud cause disc chatter and hence ought to be avoided. AIL Vaves to ASME B16.34 End Connection AIL Vaves with butt-wed ends compy with ANSI B16.25 Fig. 2a or 3a, as appicabe. For ANSI pipes, pipe schedue ought to be specified. For non-ansi pipes, OD (or ID) and wa thickness ought to be furnished for end preparation. Ordering Information Vave Size mm (in) Vave Type ASME Pr. Cass End Connection Trim Disc 50 (2 ) 80 (3 ) 100 (4 ) 150 (6 ) 200 (8 ) 250 (10 ) 300 (12 ) 350 (14 ) 400 (16 ) 450 (18 ) 500 (20 ) 600 (24 ) 3 Pressure Sea Bonnet / Cap Gate Vave 81 Cass Cass Cass 2500 Gobe Vave 66 Cass 1500 Check Vave 80 Cass Cass Cass /2 Butt-wed U Hard-faced P Gate Vave Parae Side Disc S Gobe Vave Standard None for Check Vave As a standard, AIL Vaves are made in Carbon Stee to ASTM A216 Gr. WCB. For vaves in other materias and for accesories ike gear operation and eectrica actuators, suffix suitabe abbreviations to the above ordering code such as : WC6 for ASTM A217 Gr. WC6 WC9 for ASTM A217 Gr. WC9 C12 for ASTM A217 Gr. C12 GO for Gear Operation LA for Locking Arrangement ACT for Actuator BP for Bypass IBR for IBR-certified 19

20 AIL Vaves to ASME B16.34 Pr. Sea Bonnet Gate Vaves - ASME Cass 900, 1500 & 2500 Figure Numbers /2UP, /2UP & /2UP Standard Materia of Construction S. No. Description Materia 01 Body 02 Body Seat Ring 03 Disc ASTM A216 ASTM A217 ASTM A217 Gr. WCB Gr. WC6 Gr. WC9 ASTM A216 ASTM A217 ASTM A217 Gr. WCB+HF* Gr. WC6+HF* Gr. WC9+HF* ASTM A216 ASTM A217 ASTM A217 Gr. WCB+HF* Gr. WC6+HF* Gr. WC9+HF* 04 Bonnet ASTM A216 ASTM A217 ASTM A217 Gr. WCB Gr. WC6 Gr. WC9 05 Stem 13% Cr. Stee 06 Yoke ASTM A216 Gr. WCB 07 Yoke Seeve ASTM A439 Type D2 08 Packing Graphite with braided end rings 09 Spring Incone X750 / Nimonic Gasket Graphite 11 Stud ASTM A193 Gr. B7 12 Stud Nut ASTM A194 Gr. 2H 13 Gand Stud ASTM A193 Gr. B7 14 Gand Nut ASTM A194 Gr. 2H 15 Thrust Ba Bearing Stee 16 Handwhee Stee / Maeabe Iron / SG Iron Namepate SS 304 * HF - Hard-Faced with Steite #6 or equivaent Dimensiona Detais (in mm) & Weights (in kg) Vave Cass 900 Cass 1500 Cass 2500 Size 50 (2 ) 80 (3 ) 100 (4 ) 150 (6 ) 200 (8 ) 250 (10 ) 300 (12 ) 350 (14 ) 400 (16 ) 450 (18 ) 500 (20 ) 600 (24 ) A B C Approx.Wt. A B C Approx.Wt. A B C Approx.Wt * * * * * * * * * * * * * * * * * * * * * * * * 20 * Refer to AIL 2 vaves are in fexibe wedge design. Vaves in sizes of 10 and above in Cass 900 and, 8 and above in Casses 1500 and 2500 are suppied with gear unit.

21 Pr. Sea Bonnet Y-Gobe Vaves - ASME Cass 1500 Figure No /2US Standard Materia of Construction S. No. Description Materia 01 Body ASTM A216 ASTM A217 ASTM A217 Gr. WCB+HF* Gr. WC6+HF* Gr. WC9+HF* 02 Bonnet ASTM A216 ASTM A217 ASTM A217 Gr. WCB Gr. WC6 Gr. WC9 03 Disc SS 410 Hard-Faced with Steite #6 or equiv. 04 Stem ASTM A479 Type Packing Graphite with braided end rings 06 Yoke ASTM A216 Gr. WCB 07 Gasket Graphite 08 Stud ASTM A193 Gr. B7 09 Stud Nut ASTM A194 Gr. 2H Namepate SS 304 * HF - Seat Hard-Faced with Steite #6 or equivaent Dimensions (in mm) Vave Size 80 (3 ) 100 (4 ) 150 (6 ) 200 (8 ) Pr. Sea Cover Swing Check Vaves - ASME Cass 900, 1500 & 2500 Figure Nos /2U, /2U & /2U Standard Materia of Construction S. No. Description Materia 01 Body ASTM A216 ASTM A217 ASTM A Cover Gr. WCB Gr. WC6 Gr. WC9 03 Disc ASTM A216 ASTM A217 ASTM A Seat Ring Gr. WCB+HF* Gr. WC6+HF* Gr. WC9+HF* 05 Hinge Pin 13% Cr. Stee 06 Gasket Graphite 07 Stud ASTM A193 Gr. B7 08 Stud Nut ASTM A194 Gr. 2H Namepate SS 304 * HF - Seat Hard-Faced with Steite #6 or equivaent Dimensions (in mm) & Weights (in kg) Vave Size Cass 1500 A B C Approx.Wt ? ? ? ? Cass 900 Cass 1500 Cass 2500 A B Approx.Wt. A B Approx.Wt. A B Approx.Wt. A C B - OPEN (Max.) AIL Vaves to ASME B (2 ) 80 (3 ) 100 (4 ) 150 (6 ) 200 (8 ) 250 (10 ) 300 (12 ) 350 (14 ) 400 (16 ) * Refer to AIL * * * * * * * 21

22 AIL Cryogenic Vaves AIL Cryogenic Gate & Gobe Vaves Services that hande fuids at sub-zero temperatures present severa technica chaenges. AIL s speciayadopted, extended-bonnet gate and gobe vaves provide the right soution for such ow-temperature and cryogenic services. AIL offers a range of gate and gobe vaves (as we as check vaves) for ow temperature and cryogenic services, used in processing, storage and transportation of iquefied gases such as Ethyene, LPG, LNG, Hydrogen, Heium, Oxygen, Nitrogen and Argon. Low temperature services of up to C are covered by ow-temperature carbon stees ike LCB and LCC materias. Cryogenic services at C are covered by stainess stee grades ike CF8M and CF8. AIL Cryogenic Gate and Gobe Vaves are avaiabe in ASME Cass 150, Cass 300 and Cass 600 ratings. Refer page 3 for detaied manufacturing program. Extended Bonnet Optiona extended bonnet with vapour coumn ength according to BS 6364 and / or customer specifications is furnished. The vapour coumn aows the stem packing to be functiona by keeping it away from the cryogenic fuid. Testing and Standards AIL Cryogenic Vaves are type-tested as per vave standards and specifications of eading oi companies as part of the design verification process. 22

23 Cryogenic Gate Vaves - ASME Casses 150, 300 & 600 Part List S. No. Description 01 Body 02 Body Seat Ring 03 Wedge 04 Stem 05 Gasket 06 Bonnet 07 Stud 08 Stud Nut 09 Back Seat 10 Packing 11 Gand 12 Yoke Seeve 13 Grease Fitting 14 Retainer Nut 15 Handwhee 16 Handwhee Nut Namepate Materias of construction are seected, based on the service fuid, temperature and customer specifications. AIL Cryogenic Vaves For dimensions of A and C, refer page 10 for corresponding tabes under API 600 range of vaves. Dimension B wi be as per customer requirement. Cryogenic Gobe Vaves - ASME Casses 150, 300 & 600 Part List S. No. Description 01 Body 02 Body Seat Ring 03 Disc 04 Disc washer 05 Stem 06 Disc Stem Nut 07 Gasket 08 Bonnet 09 Stud 10 Stud Nut 11 Back Seat 12 Packing 13 Gand 14 Handwhee 15 Handwhee 16 Yoke Bush Namepate For dimensions of A and C, refer page 12 for corresponding tabes under API 600 range of vaves. Dimension B wi be as per customer requirement. Materias of construction are seected, based on the service fuid, temperature and customer specifications. 23

24 AIL Specia Vaves AIL Specia Vaves Live-oaded Vaves The stem packing system in a vave prevents eakage of ine fuid to the atmosphere. The effectiveness of the seaing performance of the stem/gand packing depends on severa factors such as dimensiona toerance and surface finish of the stem and packing chamber, packing materia and its resiience, and packing pressure. In a conventiona vave, packing consoidation takes pace and the packing pressure gets reduced in service, resuting in the possibiity of eakage. To restore the packing pressure and to arrest possibe eakage, the gand nut wi have to be tightened. This adjustment restores packing seaing effectiveness. In a ive-oaded arrangement, the packing pressure or the oad is maintained reativey constant as the packing consoidates during service. This is achieved by means of a set of Disc Springs or Beevie Springs that is instaed between the the gand fange and the gand stud. This creates additiona easticity in the gand oading system. The precompression oad appied on the Disc Springs ensures that the oad required for eak-tight seaing is exerted on the packing, even after reaxation or consoidation of packing. This continuous in-service sef-adjustment resuts in superior stem seaing performance, particuary in services where pressure / temperature fuctuations or cycing are frequent. Soft-seated Vaves In appications that require positive shutoff such as in chemica and petrochemica services, the AIL Soft-seated Gate Vave is a suitabe soution. PTFE seat inserts provide the necessary soft-seating to ensure positive shutoff. Saient features of these vaves are : PTFE seat inserts for positive shutoff Bock-and-Beed capabiity Dua seating (metaic and soft seats) Intrinsicay fire-safe Bubbe-tight performance A API 600 AIL gate vaves can be offered with the option of soft-seating for sizes up to 10 (250mm). Low-emission Service Vaves To compy with the requirements for Cean Air Act, AIL Cast Stee Vaves have undergone extensive in-house testing, using Compressed Natura Gas (CNG) at the fu-rated pressure as a test medium, as we as Heium in accordance with ISA standards. Based on proven experience over the years, AIL has estabished appropriate design parameters and manufacturing methods to offer vaves that meet stringent fugitive emission norms as per industry practices. API 6D Through-Conduit Gate Vaves AIL offers a specia range of API 6D Through-conduit Gate Vaves for appications such as fow ines, manifods, pipeine transmission and distribution, pressure reguation and metering runs, underground storage and genera pipeine service. These vaves are avaiabe in the foowing ranges : 2 (50mm) - 30 (750mm) in ASME Cass 150 to Cass (50mm) - 16 (400mm) in ASME Cass 1500 Important features of these vaves are : Important features of these vaves are : Gand Packing of high-purity, fexibe graphite, sandwiched between braided graphite end-rings with Incone wire mesh reinforcement. On request, gand packing with conica / wedgeshaped configuration can aso be offered. Through conduit, fu-bore (piggabe) or reduced-bore Vave seat with PTFE inserts for bubbe-tight sea Sef-reieving seat ring Different options avaiabe for stem packing system Bonnet gasket in vaves of ASME Cass 150 is made of graphite- SS 316 insert. Vaves of Cass 300 feature gaskets of spiraywound stainess stee with graphite fier. In vaves of Cass 600 and higher, metaic ring gaskets are offered. The stem finish is RMS, with a straightness of over the ength of the pain shank. Cyindricity is controed as per AIL standards. The Stuffing Box surface finish is 180 RMS max., and its straightness is controed as per AIL standards. The diametrica cearances between the stem, gand and the stuffing box are controed to cose toerances, to ensure that emission norms are compied with.

25 AIL Vave Accessories GEAR OPERATORS AIL gate and gobe vaves are suppied with fuy-encosed beve gear operators as a standard for sizes and cass ratings as shown in the tabe beow. Gear operators are avaiabe as an option in other sizes too. Vave ASME API 600 ASME B16.34 Type Cass Standard Optiona Standard Optiona & above & above & above & above - 10 & above 6 & & above - 10 & above 6 & & above & above & above & above Gate Gobe ELECTRICAL ACTUATORS Eectrica Actuators may be used with AIL vaves in a sizes and cass ratings. The actuators can be operated in practicay any position or ocation, and have a provision for manua operation. The actuators come in weatherproof encosure as a standard, and in exposion-proof and such other specia encosures too. For correct seection of actuator, pease specify detais of ine pressure, differentia pressure when cosed, power suppy requirements and actuator accessories. CHAIN WHEELS Chain whees are used for the vaves ocated too far above the foor for convenient hand whee operation. Chain whees are avaiabe for a types of AIL Cast Stee Vaves and can be substituted in pace or used aong with the existing hand whee. AIL chain whees are equipped with guards or guides, not ony to keep the chain from sipping off from the whee but aso to hod the chain in cose contact with a arge portion of the circumference of the hand whee or the gear whee. LANTERN RING As mentioned earier in page 7, a antern ring is used to provide further integrity to the gand packing area in gate and gobe vaves, to prevent escape of service fuid to the atmosphere. This finds appication in stringent environment conditions or in the case of potentiay harmfu service fuids. The antern ring is provided between two sets of packing rings, with a eakoff pug that gives the option of remova of eakage, if any, from the ower packing rings. Aternativey, a seaing fuid can be introduced through the pug to prevent incidenta eakage through the ower packing rings. Lantern rings serve a usefu purpose. But, since they are a possibe source of shaft scoring, it is advisabe to restrict their usage to essentia appications. AIL Vave Accessories BYPASS ARRANGEMENT A bypass arrangement serves two purposes - first, in steam services, to warm up the ine before opening of the main vave, and secondy, in steam and other ines, to baance the pressure on both sides of the main vave wedge or disc to bring down the vave opening torque. POSITION INDICATORS Vaves can be provided with position indicators as a visibe means to indicate the open and cosed positions. Typicay, for gate vaves, the indicator is in the form of a pointer traveing aong a fixed scae. As an option, amost a AIL vaves can be furnished with bypass arrangement. The bypassconsists of a singe Outside Screw & Yoke gobe vave with a pressure / temperature rating and corrosion resistance equa to or exceeding that of the main vave. Size Chart Main vave 2 to 4 5 to 8 10 or higher Bypass vave 1 /2 3 /4 1 Bypass vave is attached to the side of the main vave with the stems of the both vaves parae and pointing upward. Where service conditions warrant arger-than-standard bypasses, it is recommended that the instaation of the bypasses be around the main vave. LOCKING DEVICES Locking devices are used to secure a handwhee in a fixed position, to prevent accidenta or unauthorized operation of a vave. The ocking arrangement typicay aows the use of chain and padock to secure the vave. 25