DEP7 SG Iron Excess Pressure Valve

Transcription

1 Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. opyright 2013 P7 SG Iron xcess Pressure Valve TI-P H Issue 10 escription The P7 is an SG iron direct acting bellows sealed excess pressure valve. The standard version has an PM diaphragm limited to 125 and is suitable for steam and water applications. lso available for oil applications is a Nitrile rubber diaphragm (suffix 'N' i.e. P71N which is limited to 90 ). Note: To protect the actuator diaphragm on steam applications a WS4 water seal pot must be installed in the downstream pressure signal line to the actuator. Refer to TI-S12-03 for further details. Standards The products listed below comply with the requirements of the uropean Pressure quipment irective 97 / 23 / and carry the when so required. ertification This product is available with a manufacturers' Typical Test Report. Note: l l c e r t i fi c a t i o n / i n s p e c t i o n r e q u i r e m e n t s m u s t b e s t a t e d a t the time of order placement. vailable types: N15 to N50 screwed connections and N15 to N100 flanged connections. The P7 is also available in a choice of 6 pressure ranges (suffix 1-6): Upstream pressure ranges: Range Valve type ctuator Spring Pressure range (bar) PN type colour N15 - N40 N50 - N80 N100 Rating 1 P71 11 or 11N Yellow P72 12 or 12N Yellow P73 13 or 13N lue P74 14 or 14N lue P75 15 or 15N lue P76 15 or 15N Red mark Pressure / temperature limits Temperature Steam 100 saturation curve G F Pressure bar g The product must not be used in this region. -- Flanged N 1092 PN25 --G Flanged N 1092 PN16 --F Flanged SM 150 Note: In the case of liquid service, this product is to be used only on intermittent duty. pplications such as continuous pump recirculation may cause valve and pipework damage due to cavitation which is not covered under the terms of our warranty. ody design conditions PN25 Maximum design pressure 25 bar 100 Maximum design temperature 17.5 bar g Minimum design temperature 0 Maximum operating temperature PM diaphragm 125 Nitrile diaphragm 90 Minimum operating temperature (ambient) 0 Note: For lower operating temperatures consult Spirax Sarco Maximum differential pressure N15 - N50 N65 - N bar 20 bar esigned for a maximum cold hydraulic test pressure of 38 bar g Note: With internals fitted, test pressure must not exceed 25 bar g Sizes and pipe connections ½", ¾", 1", 1¼", 1½" and 2" Screwed: SP (S 21 parallel), NPT also available N15, N20, N25, N32, N40, N50, N65, N80 and N100 Standard flanges: N 1092 PN16 or PN25 Flanges available on request: SM 150 and JIS Screwed ½" to 2" Flanged N15 to N100 Kvs values Size N Kvs Note: The Kvs values shown above are full capacities and should be used for safety valve sizing purposes where they are required. Page 1 of 8

2 Materials No. Part 1 ody Material N15 to N50 SG iron IN 1693 GGG 40.3 N65 to N100 SG iron NG JS LT 2 onnet SG iron IN 1693 GGG Valve seat Stainless steel S S29 N15 Stainless steel 4 Valve seat gasket N20 and N25 Mild steel N32 to N50 Reinforced exfoliated graphite 5 Valve head Stainless steel S S29 6 Valve head screw N15 and N20 Stainless steel S Valve head seal rlon ush N25 to N20 Stainless steel S S29 9 ush (part of item 10) N25 to N100 Stainless steel S S29 10 alancing bellows assembly N25 to N100 ISI 316L 11 alancing bellows gasket N25 to N100 Reinforced exfoliated graphite 12 onnet gasket Reinforced exfoliated graphite 13 onnet nuts Steel IN 267 Pt13 Gr. 8 N15 to N40 M10 14 onnet studs N50 and N65 M12 Steel IN 267 Pt13 Gr. 8.8 N80 and N100 M16 15 Pillars Zinc plated steel S M07 16 Pillars nuts Zinc plated steel S 3693 Gr Spring adjuster Zinc plated cast iron IN 1691 GG25 18 Spring(s) hrome vanadium 19 ush (part of item 20) PTF / steel composite 20 Sealing bellows assembly Stainless steel ISI 316L 21 Sealing bellows gasket N15 and N20 Stainless steel 'S' type N25 to N100 Reinforced exfoliated graphite 22 lamp nut N25 to N100 Zinc plated steel S M07 25 Lock-nut Zinc plated steel S M07 26 Spring plate Zinc plated steel S 1449 Pt 1 HR14 27 Needle bearing Steel 28 Setting nut Zinc plated steel S M07 29 earing locator Zinc plated steel S M07 30 djuster sleeve Zinc plated steel 31 Mounting plate (not shown) Zinc plated steel S 1449 Pt 1 HR14 32 Housing Types 11(N) to 14(N) Steel IN 1514 St W24 Type 15(N) Steel S N S355 J2G3 33 Housing screws Types 11(N) to 12(N) Zinc plated steel S 3692 Gr. 5.6 Types 13(N), 14(N) and 15(N) Zinc plated steel S 3692 Gr Housing nuts Types 11(N) to 12(N) Zinc plated steel S 3692 Gr. 5.6 Types 13(N), 14(N) and 15(N) Zinc plated steel S 3692 Gr Spindle guide Stainless steel S S29 36 iaphragm PM fabric reinforced or suffix 'N' Nitrile fabric reinforced 37 Hexagon headed bolt Stainless steel S Sealing washer Fibre 39 iaphragm clamp Stainless steel STM 351 F8M 40 Piston Zinc plated carbon steel S 1449 Pt 1 HR14 41 Spindle Zinc plated carbon steel S M07 42 Mounting nuts Zinc plated steel S 3692 Gr oupling Zinc plated steel 44 Thread insert N15 and N20 Stainless steel T Self-locking nut N25 to N100 Zinc plated steel S 1449 R4 46 Washer Type 12(N) only Zinc plated steel S 1449 R4 47 irclip Zinc plated steel 48 Spindle seal 'O' ring PM or suffix 'N' Nitrile 49 earing bush PTF / steel composite 50 Housing seal 'O' ring PM or suffix 'N' Nitrile 51 Vent plug Plastic 52 oupling clamp Zinc plated steel STM 216 Gr. W 53 Spring Spring steel S 5216 Gr. M4 54 lamp screw Zinc plated steel S 4168 Gr Page 2 of 8

3 N15 to N N65 and N N25 to N50 (Parts 42 and 46 are not shown) Page 3 of 8

4 Sizing and selection for steam applications The sizing chart below can be used to determine the K v value of the valve for steam applications by plotting: - Upstream pressure. - Maximum valve pressure drop. - Maximum steam load. Where the K v value is known, the chart can be used to determine pressure drop across the valve for any given flowrate. Kv sizing example: Maximum flowrate kg/h Upstream pressure 9 bar g (10 abs) Maximum pressure drop 0.5 bar raw a horizontal line - at 10 abs. t intersection with 0.5 pressure drop draw a vertical line -. raw a vertical line - F at kg/h. t intersection G, read the required K v = 28. Valve size required N50 having the next highest K v of 40. xample line G F Note: The sizing chart is empirical and should not be used for critical applications. Page 4 of 8

5 Sizing and selection for water applications The sizing chart below can be used to determine the K v value of the valve for water applications by plotting: - Maximum flowrate. - Maximum valve pressure drop. Where the K v value is known, the chart can be used to determine pressure drop across the valve for any given flowrate. Kv sizing example: Maximum flowrate 10 m 3 /h. Maximum allowable pressure drop 0.3 bar. raw a horizontal line - at 10 m 3 /h. raw a vertical line - at 0.3 bar pressure drop. t intersection, read the required K v = 19. Valve size required N40 having the next highest K v of 24. xample line Note: The sizing chart is empirical and should not be used for critical applications. Page 5 of 8

6 Spare parts for the N15 and N20 (½" and ¾") valves The spare parts available for sizes N15 and N20 valves are detailed below. No other parts for these sizes are supplied as spares. vailable spares oupling iaphragm set iaphragm and sealing washer., Needle bearing Sealing bellows set Sealing bellows assembly, sealing bellows gasket, bonnet gasket and head seal., F, G, H ontrol spring(s) Seat / head set Seat, seat gasket, head, bonnet gasket and head seal. J, K, L, G, H Gasket set Sealing bellows gasket, bonnet gasket and seat gasket. F, G, K ctuator spindle guide assembly Spindle guide, bearing bush, spindle seal 'O' ring, housing seal 'O' ring and circlip. How to order spares lways order spares by using the description given in the column headed 'vailable spares' and state the size and type of valve. xample: 1 - Gasket set for a Spirax Sarco N15 P71 express pressure valve. How to fit spares Full fitting instructions are given in the Installation and Maintenance Instructions supplied with the spare(s). I P, R, S, T, V K L J H G I F R V P T S N15 and N20 Page 6 of 8

7 Spare parts for the N25 to N100 (1" to 2") valves The spare parts available for sizes N25 and N100 valves are detailed below. No other parts for these sizes are supplied as spares. vailable spares oupling iaphragm set iaphragm and sealing washer., Needle bearing Sealing bellows set Sealing bellows assembly and sealing bellows gasket, F ontrol spring(s) Seat/head set N25 to N50 Seat, seat gasket, head, self-locking nut, head seal and bonnet gasket. J, K, L, W, H, G Head set N65 to N100 Head, head seal, self-locking nut, bonnet gasket and balancing bellows gasket. L, H, W, G, M alancing bellows set N25 to N50 alancing bellows set N65 to N100 Gasket set N25 to N50 alancing bellows assembly, balancing bellows gasket, bonnet gasket, head seal and sealing bellows gasket. N, M, G, H, F alancing bellows assembly, balancing bellows gasket, N, M, G, H bonnet gasket and head seal. Sealing bellows gasket, bonnet gasket, seat gasket and balancing bellows gasket. I F, G, K, M Gasket set N65 to N100 Sealing bellows gasket, bonnet gasket and balancing bellows gasket. F, G, M ctuator spindle guide assembly Spindle guide, bearing bush, spindle seal 'O' ring, housing seal 'O' ring and circlip. P, R, S, T, V How to order spares lways order spares by using the description given in the column headed 'vailable spares' and state the size and type of valve. xample: 1 - Gasket set for a N25 P71 excess pressure valve. How to fit spares Full fitting instructions are given in the Installation and Maintenance Instructions supplied with the spare(s). L W H G M N I V P R T S F N25 to N100 Page 7 of 8

8 imensions (approximate) in millimetres Flanged Screwed Upstream pressure range N 1092 SM SP / NPT Size PN N N N N N N N N N P with flanged connections and Type 13 / 13N or 14 / 14N actuator 1 P with screwed connections and Type 13 / 13N or 14 / 14N actuator 2 Type 11 / 11 or 12 / 12N actuator arrangement Type 15 / 15N actuator arrangement ä ä Valve weight (kg) Valve size N15 N20 N25 N32 N40 N50 N65 N80 N100 Yellow spring Weight lue spring Red spring Reduction for screwed body Safety information, installation and maintenance For full details see IM-S12-10 supplied with the product. ctuator weight (kg) ctuator type 11 or 12 or 13 or 14 or 15 or 11N 12N 13N 14N 15N Weight Note: To calculate the total product weight add the valve and actuator weights together. Installation note: aution: To protect the actuator diaphragm on steam applications a WS4 series water seal pot must be installed in the upstream pressure signal line to the actuator, refer to TI-S12-03 for details. The valve should be mounted vertically downwards in a horizontal pipeline with the direction of flow as indicated by the arrow on the valve body. For applications with upstream temperatures below 125 the valve can alternatively be mounted vertically upwards. How to order xample: 1 off Spirax Sarco N40 P73 direct acting pressure reducing valve having flanged PN25 connections. Note: dd suffix 'N' if the Nitrile rubber diaphragm is required. i.e. P73N. Page 8 of 8