TOP AND BOTTOM GUIDED VALVES

Transcription

1 PRODUCT SERIES 0/7, 20 & 0 kenttrol TOP AND BOTTOM GUIDED VALVES FORTY YEARS

2 PRODUCT SERIES 0/7, 20 & 0 0 KOSO KENT INTROL SUPPLIES A DIVERSE RANGE OF PRECISION MANUFACTURED CONTROL, CHOKE, AND ROTARY VALVES FOR OIL AND GAS, PETROCHEMICAL AND POWER INDUSTRIES WORLDWIDE TABLE OF CONTENTS SERIES 0/7 SINGLE SEATED VALVE SERIES 20 DOUBLE SEATED VALVE 7 SERIES 0 THREE WAY VALVE 9 SELECTION GUIDELINES DIMENSIONS

3 02 TOP AND BOTTOM GUIDED VALVES Top guided control valves have been used for process control sce the 940 s. Prior to the 940 s control valves were basic and were unable to produce accurate control of the process fluid. Top guided valves were developed to give accurate and stable control; they were the first valves to offer a characterised plug. The origal designs were produced as a sgle seated valve. But these were later developed to double seated constructions for high capacity applications, and threeway constructions for splittg or mixg flows. SERIES 0/7 Traditionally top guided valves were used the vast majority of process applications, however, for todays high performance applications the top guided valves maly tend to be used low rated services. The series 0 control valve is a robust, heavy section sgle seated globe valve with a contoured plug to accurately control the flow through the valve. The series 7 is the angle body version. SERIES 20 The series 20 valve corporates two seats which provides a high capacity capability. The guidg of the plug enables the valve to control higher energy flows a stable manner. The double seated plug is herently balanced and therefore enables economical actuation of larger valves than on a sgle seated design. SERIES 0 The series 0 three way control valves are designed around the series 0 body construction. They are unbalanced valves and primarily used for proportional blendg (mixg) of two flows. When flowed reverse they can be used for flow splittg duties. QUALITY MANUFACTURING Matag the highest standards of quality throughout design, production and customer service is the cornerstone of Koso Kent Introl s philosophy. Our plant is accredited accordance with Quality Management System ISO 900 and Environmental Management System ISO 400. In addition all products, where applicable, conform to ATEX, PED and all other applicable EU Directives and are CE marked accordgly. The company s standard manufacturg experience cludes NACE MR0.75, NORSOK, API 6A specifications and dividual customer specifications. Our house spection and testg facilities clude hardness testg, NDE, PMI, gas and flow testg. Safety is the key element everythg we do, with all employees undergog both general and specific Health and Safety trag. SERIES The series three way valve is used for flow splittg duties. The basic body construction is based on the series 20 valve. The valve has one let and two outlets for proportional splittg of the process. The plug is herently balanced. SERIES 2 The series 2 three way control valves are designed around a cage guided balanced plug construction. They are used for the proportional splittg of flows where actuator sizg is a problem. Flow is from under the valve and is diverted through the straight outlet connections.

4 PRODUCT SERIES 0/7, 20 & 0 0 SERIES 0/7 SINGLE SEATED GLOBE VALVES The series 0/7 control valve is a robust, heavy section sgle seated globe/angle valve with a contoured plug to accurately control the flow through the valve. The trim has a high rangeability and gives Class V shut off capability through metal to metal seatg. For bubble tight shut off, Class VI, the plug can be fitted with a PTFE face. SCOPE OF DESIGN END CONNECTION SIZES /2 to 2 (5mm to 00mm) as standard END CONNECTION STYLES Flanged Socket Weld Threaded Butt Weld VALVE BODY RATINGS ANSI 50 to ANSI 600 Higher on request DESIGN STANDARD ANSI B6.4/PED Certified NORSOK/ASME VIII INHERENT CHARACTERISTIC Lear Equal Percentage Quick Open SEAT LEAKAGE Class III as standard Class IV, V special lapped Soft Face Seat for Class VI shut off MATERIAL CONSTRUCTION Available most cast materials FEATURES Top guided with no bottom guide to obstruct the seat bore and potentially trap debris All trim components are removable from the top Large range of trim CV s per valve size PERFORMANCE High flow capacity Tight shut off Excellent flow control rangeability Cast body proportioned to withstand high pipe stresses without distortion TRIM DESIGNS CONTOURED TRIM AS SHOWN The contoured plug is designed with a specially profiled valve plug head. The plug head profile determes the flow characteristic through the valve, and offers a smooth profile to the flow leadg to a high pressure recovery. The trim is most suited to low pressure drop duties and is used the majority of control applications. CONTOURED TRIM SOFT FACED A variation of the standard contoured plug is the soft faced option. The plug head is manufactured with a clamped on shroud which locks the soft faced rg position. When the soft face contacts the seatg pot it deforms the softer rg ensurg a high degree of closure. The soft faced plug is used on duties where bubble tight shut off is required. Contoured plug

5 04 TABLE. CV VALUES FOR SERIES 0/7 TRIMS VALVE SIZE mm TRIM SIZE CONTOURED TRIM Equal % Lear Quick open TABLE 2. CONTOURED CV VALUES FOR 2 (2 25mm) VALVE SIZES VALVE SIZE mm TRIM SIZE CONTOURED TRIM Equal % Lear Quick open * ** * Only available valve size /4 (20mm) and (25mm) ** Only available Valve size (25mm) For contoured trim with soft face CV =

6 PRODUCT SERIES 0/7, 20 & 0 05 MICROSPLINE TRIM The microsple trim design is a seat guided construction, capable of handlg high pressure drops, without stability problems. This trim design has an herent flow characteristic of Mod. =%, and has excellent rangeability. It is an ideal selection for the control of very low flow rates. For very high pressure drop applications, or flows which would potentially cavitate there are multistage options of this design (5 stages maximum), and there are also tungsten carbide and advanced ceramic options for pressure drops greater than 00 bar (450 psi). The illustration adjacent represents a sgle stage design. The flow is controlled by one or more flutes mached to a parallel plug nose. In order to achieve the very low flow control and high rangeability, the plug and seat are manufactured as matched pairs to give a gravity slide fit. TABLE. MICROSPLINE CV VALUES VALVE SIZE mm TRIM SIZE CHARACTERISTIC REF MOD. EQUAL % No No. 0.5 No No No No No No No No. 0.0 No No No No No No On MultiStage Trim Designs the No. 00 and No. 0 trims require a./2 body. Multisple trims only available sizes No.00 to No.6.

7 06 MULTISTAGE MICROSPLINE TRIM The trim design presented below right is a MultiStage Sple trim. There are 2 Stage, Stage and 5 Stage designs available as standard dependg on pressure drop and potential for cavitation. The fluid passes through the flow path generated by corporatg angled flats onto the surface of the plug, together with a cut out on the ternal diameter of the seat. The pressure drop is apportioned across the stages of letdown so that the pressure drop progressively reduces as it passes through the stages of the trim. This gives excellent resistance to cavitation on high pressure drop applications. For very high pressure drop applications the plug and seat sert would be manufactured from tungsten carbide or Advanced Ceramic material. A Tcut section is used to counter any misalignment between the valve stem and actuator. TABLE 4. RANGEABILITY FOR SERIES 0/7 TRIMS TRIM SIZE REFERENCE No. 00 to No. 5 No. 6 to No. No. to No. 5 to 6 4 to 2 to MAXIMUM RANGEABILITY 50: 0: 50: 40: 55: 55: 4 to 6 70: STATIC PRESSURE P HIGH RECOVERY VALVE TRIM } } STAGE STAGE 2 } S MSPLINE STAGE PRESSURE DROP STAGE to 2 0: P v CAVITATING FLOW P vc VENA CONTRACTA VALVE INLET VALVE OUTLET Stage pressure drop CAVITATION EXPLAINED Cavitation occurs only liquid service. In simple terms, cavitation is the twostage process of vaporisation and condensation of a liquid. Vaporisation is simply the boilg of a liquid, which is also known as FLASHING. In a control valve this vaporisation takes place because the pressure of the liquid is lowered, stead of the more common occurrence where the temperature is raised. As fluid passes through a valve just downstream of the orifice area, there is an crease velocity or ketic energy that is accompanied by a substantial decrease pressure or potential energy. This occurs an area called the VENA CONTRACTA. If the pressure this area falls below that of the vapour pressure of the flowg fluid, vaporisation (boilg) occurs. Vapour bubbles then contue downstream where the velocity of the fluid begs to slow and the pressure the fluid recovers. The vapour bubbles then collapse or implode. Cavitation can cause a CHOKED FLOW condition to occur and can cause mechanical damage to valves and pipg. 5 Stage MultiSple Trim

8 PRODUCT SERIES 0/7, 20 & 0 07 SERIES 20 DOUBLE SEATED GLOBE VALVES The series 20 valve corporates two seats which results a higher capacity capability than the Series 0. The guidg of the plug enables the valve to control higher energy flows a stable manner. Double seated valves are herently balanced and therefore enables economical actuation of larger valves than with a sgle seated design. The design can be used for medium and low pressure applications where tight shut off is not important. For high capacity applications where high pressure drops occur then the series 20 valve can be fitted with the HF style trim. SCOPE OF DESIGN TRIM DESIGNS END CONNECTION SIZES.5 to 24 (40mm to 600mm) END CONNECTION STYLES Flanged VALVE BODY RATINGS ANSI 50 to ANSI 600 as standard,higher ratgs on request DESIGN STANDARD ANSI B6.4/PED Certified NORSOK/ASME VIII INHERENT CHARACTERISTIC Lear Quick Open Equal Percentage SEATING Metal to Metal for up to Class III shut off MATERIALS CONSTRUCTION Available most cast materials FEATURES Top and bottom guided Anticavitation/low noise trim option for high pressure drop applications All components serviceable from the top Multi trim sizes available per valve size CONTOURED TRIM The contoured plug is designed with a specially profiled valve plug head. The plug head profile determes the flow characteristic through the valve, and offers a smooth profile to the flow leadg to a high pressure recovery. The trim is most suited to low pressure drop application and is used the majority of control applications. HIGH FRICTION HIGH CAPACITY TRIM The high friction trim has been developed for higher pressure drop applications and where high capacity flows are required. The trim is manufactured with high friction style extended seat rgs to ensure low pressure recoveries. This means that the trim is ideal for preventg the onset of cavitation and reducg noise levels generated as a result of both liquid and gas/vapour flows. PERFORMANCE High flow capacity Mimum differential plug areas to reduce actuator force requirements Excellent flow control rangeability Cast body proportioned to withstand high pipe stresses without distortion

9 0 TABLE 5. SERIES 20 CV VALUES VALVE SIZE mm TRIM SIZE CONTOURED TRIM Equal % Lear Quick open HIGH FRICTION HF Equal % Lear TABLE 6. RANGEABILITY VALUES FOR SERIES 20 CONTOURED AND HF TRIMS TRIM SIZE MAXIMUM RANGEABILITY 2 to 4 to 6 to 2 4 to 24 0: 40: 45: 50:

10 PRODUCT SERIES 0/7, 20 & 0 09 SERIES 0, & 2 THREE WAY VALVES SCOPE OF DESIGN END CONNECTION SIZES /2 to 2 (40mm to 00mm) nomal bore END CONNECTION STYLES Flanged VALVE BODY RATINGS ANSI 50 to ANSI 600 as standard, higher ratgs on request DESIGN STANDARD ANSI B6.4/PED Certified NORSOK/ASME VIII INHERENT CHARACTERISTIC Lear SEATING Metal to Metal for up to Class V shut off MATERIALS CONSTRUCTION Available most castable materials FEATURES Top guided plug with additional skirt guidg through the seat rgs effective on both seats Most components serviceable from the top Multi trim sizes available PERFORMANCE High flow capacity Mimum differential plug areas to reduce actuator force requirements (Series and 2 valves Excellent flow control rangeability SERIES 0 The series 0 three way control valves, image A, are designed around the series 0 body construction. They are unbalanced valves and primarily used for proportionalblendg (mixg) of two flows. When flowed reverse they can be used for flow splittg duties. SERIES The series three way valve, image B, is used for flow splittg duties. The basic body construction is based on the series 20 valve. The valve has one let and two outlets for proportional splittg of the process. The plug is herently balanced. SERIES 2 The series 2 three way control valves are designed around a cage guided balanced plug construction. They are used for the proportional splittg of flows where there would otherwise be high unbalanced forces actg on the plug. Flow is from under the valve. Image B Image A

11 0 TRIM DESIGNS SERIES 0A MIXING (BLENDING) SERVICE When used on mixg service the series 0 valve has two separate lets and one common outlet. The flows are proportionally blended to one stream by control of the valve plug position. The standard plug is a lear V port design and provides a high flow capacity, coupled with high rangeability. SERIES 0B SPLITTING (DIVERTING) SERVICE When flowed reverse the series 0 valve can be used for splittg the flows. On this duty the valve has one common let and flow is proportionally split between the two outlets. The total outlet capacity is constant irrespective of the plug position. Mixg (Blendg) Service SERIES SPLITTING (DIVERTING) SERVICE The series valve is based on the series 20 body pattern with an additional body rib serted to separate the flow streams. The under/over flow regime means that the plug is herently balanced meang that size for size a smaller actuator can be utilised when compared with usg a series 0 valve. SERIES 2 SPLITTING (DIVERTING) SERVICE The series 2 valve design is based on a series 0 body castg. A bottom flange is fitted on the bottom of the body as an let connection. The trim is cage guided with a balanced plug. Dependg on the plug position flow is proportionally directed to the left or right hand outlet branch. The trim design is either ported or HF. The balanced trim construction allows the potential for high flow rates while the actuator size is kept to a mimum. TABLE 7. SERIES 0/ DESIGN CV VALVES VALVE SIZE mm TRIM SIZE CHARACTERISTIC Lear Splittg (Divertg) Service Consult factory for CV Values of Series 2 Valves TABLE. SERIES 0/ RANGEABILITY TRIM SIZE MAXIMUM RANGEABILITY 2 to 4 to 2 4: 65:

12 PRODUCT SERIES 0/7, 20 & 0 SELECTION GUIDELINES VELOCITY LIMITATIONS In selectg a valve for either a liquid or gas/vapour application one of the major considerations is the effect of fluid velocity. High velocity could lead to operational problems cludg erosion, excessive vibration and stability. The followg tables dicate the maximum recommended velocity values for liquid and gas/vapour services. TABLE 9. RECOMMENDED MAXIMUM VELOCITIES FOR LIQUID FLOW TRIM DESIGN VALVE SIZE CARBON STEEL ALLOY STEEL BRONZE, CU, NI, ALLOY mm ft/s m/s ft/s m/s ft/s m/s Microsple 2 to 2 5 to Contoured/V ported 2 to 2 5 to to 6 0 to to to to 400 to HF to 2 25 to to to TABLE 0. RECOMMENDED MAXIMUM VELOCITIES FOR GAS/VAPOURS FLOWS TRIM DESIGN VALVE SIZE MAXIMUM INLET MAXIMUM OUTLET MAXIMUM OUTLET MACH. mm ft/s m/s ft/s m/s >95dBA >90dBA >5dBA NUMBER FOR REQUIRED NOISE LEVEL Microsple 2 to 2 5 to Contoured/V ported 2 to 2 5 to to 6 0 to to to to 400 to HF to to

13 2 MATERIALS OF CONSTRUCTION Valve trim materials are selected based on the process fluid, pressure drop, process contamation, etc. Listed below are the standard material used selectg the appropriate trim design and trim materials. On liquid flows it is always necessary to consider the potential for cavitation or flashg. TABLE. TRIM MATERIAL COMBINATIONS TYPICAL DUTY PLUG SEAT STEM GUIDE BUSH PACKING PARTS Standard Duty 6 st. st 6 st. st 6 st. st 440C st.st 6 st. st. NACE 6 st. st 6 st. st 6 st. st Stellite 6 st. st Acids Hastelloy B/C Hastelloy B/C Hastelloy B/C Stellite Hastelloy B/C Acids Alloy 20 Alloy 20 Alloy 20 Stellite Alloy 20 Seawater/Corrosive Monel 400 Monel K500 Monel K500 Monel K500 Monel 400 NACE/Seawater Duplex Duplex Duplex Stellite Duplex TABLE 2. OVERLAY OPTIONS PLUG SEAT Moderate pressure Gr.6 Stellite Face Gr.6 Stellite Face drop (5 bar/200psi) Moderate pressure Full Gr.6 Stellite Gr.6 Stellite Face drop (0 bar/400psi) TABLE. BONNET AND PACKING SELECTION COMPONENT BELOW 00 C 00 C TO 20 C 20 C TO 250 C 250 C TO 400 C ABOVE 400 C (50 F) (50 F to 4 F) (4 F to 42 F) (42 F to 752 F) (752 F) Bonnet Cryogenic Normalisg Standard Normalisg Normalisg Packgs PTFE Chevron PTFE Chevron PTFE Chevron Graphite Graphite (*) *Not on oxidizg services. STEM PACKINGS STANDARD BONNET GUIDE BUSH PLUG SEAT Bellows Bonnet for applications where gland leaks cannot be tolerated

14 PRODUCT SERIES 0/7, 20 & 0 DIMENSIONAL INFORMATION SERIES 0 SERIES 20 SERIES 0 SERIES TABLE 4. SERIES 0 DIMENSIONS FOR LOW RATED VALVES /2 /4 / mm 20mm 25mm 40mm 50mm 0mm 00mm 50mm 200mm 250mm 00mm 50mm 400mm 450mm 500mm 600mm ANSI 50 and PN0 & 6 F 7 /4 4 7 /4 4 7 /4 4 / / / 52 7 / / / / /4 40 G 6 / / / / 62 7 /6 0 9 / / / / /6 4 7 /6 4 K 7 /4 97 / / 276 / 5 5 / / / 562 ANSI 00 and PN25 & 40 F 7 / / 94 7 / / / /2 4 /2 6 5 / / / 70 0 / / / / G 6 / / / / 62 7 /6 0 9 / / / / /6 4 7 /6 4 K 7 /4 97 / / 276 / 6 5 / / / ANSI 600 and PN00 F 20 / 206 / / 25 /4 26 /4 7 5 / / /4 9 / / 0 49 / G 6 / / / / 62 7 /6 0 9 / / / / / /6 455 K 6 / 62 7 /6 0 9 / / / / / /6 455 ANSI 600 RTJ Series 0/0 F 20 / 206 / / 25 /4 26 / / / 5 24 / 6 0 / / 2 ANSI 600 RTJ Series 20/ F 9 7 / 25 /4 26 / / / 5 24 / 6 0 / / 2 Standard Bonnet Series 0/0 L 5 / / / / / 6 20 / / 276 / / /2 94 Normalisg Bonnet Series 0/0 L /4 222 /4 222 /4 222 /2 292 / / / 9 7 / /6 67 Bellows Bonnet Series 0/0 L 2 / / / / / /6 465 / / / / /6 9 Standard Bonnet Series 20/ L 2 / / / / / / / 270 / / 7 20 / / 5 22 / / / Normalisg Bonnet Series 20/ L 2 / / 65 6 / / /4 756 / /4 9 / / / /2 45 Bellows Bonnet Series 20/ L 5 / 4 5 / / / / / / / / / / / 654 Valve Stroke A / 2 / 2 / 2 / 2 / 2 /2 /2 2 / /4 57 /2 9 /2 9 /2 9 / Series 0 to ANSI 600 M 2 5 / / / 67 /4 / 6 4 / 5 / / / / 25 Series 20 to ANSI 600 M 5 / / / / 29 /2 4 7 / 44 / / / / /4 46 /4 75 Bonnet Mount Dia (All) A 2 / 54 2 / 54 2 / 54 2 / 54 2 / 54 2 /6 7 2 /6 7 9 / / / / / / / / /4 46 Stem Up Position A 4 5 / / / / / / / 4 7 / / Stem Conn. Dia A / 9.5 / 9.5 / 9.5 /2 2.7 / / 6 / /4. /4. NOTE: Face to face dimensions comply with ANSI ISA S75.0. All dimensions will be confirmed the event of an order.

15 4 TABLE 5. SERIES 0 DIMENSIONS FOR HIGH RATED VALVES DESCRIPTION DIM mm 20mm 25mm 40mm 50mm ANSI 900/500 F ANSI 2500 F Standard Bonnet L ANSI 900/ Normalisg Bonnet L ANSI 900/ Standard Bonnet L ANSI Normalisg Bonnet L ANSI CL to Base M ANSI 900/ CL to Base M ANSI Bonnet Mount Dia ANSI 900/ Bonnet Mount Dia ANSI Stem Conn. Dia 2 2 ANSI 900/ Stem Conn. Dia ANSI Net Weight kg ANSI 900/500 Net Weight kg ANSI 2500 TABLE 6. SERIES 0 VALVE WEIGHTS KG (STANDARD BONNET) SERIES RATING mm 40mm 50mm 0mm 00mm 50mm 200mm 250mm 00mm 50mm 400mm 450mm 500mm 600mm 0 ANSI ANSI ANSI ANSI ANSI ANSI ANSI ANSI ANSI TABLE 7. LEAKAGE CLASS VALVE DESIGN SEATING STYLE ANSI LEAKAGE MAXIMUM ALLOWABLE CLASS LEAKAGE Series 20 Metal to Metal Class III 0.% Rated Capacity Series 0, 0,, 2 Metal to Metal Class IV 0.0% of Rated Capacity (Series 2 valve fitted with resilient seal) Series 0, 0,, 2 Metal to Metal with lapped seats Class V ml/m of water per (Series 2 valve fitted with resilient seal) ch of port diameter per PSI differential Series 0 Metal with Resilient Seat Class VI Bubbles

16 KOSO KENT INTROL LIMITED ARMYTAGE ROAD BRIGHOUSE WEST YORKSHIRE HD6 QF TELEPHONE +44 (0) FACSIMILE +44 (0) WEBSITE KOSO INDIA PRIVATE LIMITED J & 2, MIDC, AMBAD, NASHIK42200 MAHARASHTRA, INDIA. TELEPHONE FACSIMILE enquriy@koso.co. WEBSITE Koso Kent Introl Limited and Koso India Private Limited are part of the KOSO Group of companies. The company s policy is one of contual development and the right is reserved to modify the specifications contaed here without notice.