DRV7 and DRV7G SG Iron Pressure Reducing Valves
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- Egbert Pope
- 5 years ago
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1 Local regulations may restrict the use of this product to below the conditions quoted. n the interests of development and improvement of the product, we reserve the right to change the specification without notice. opyright 2013 RV7 and RV7G SG ron Pressure Reducing Valves T-P ssue 14 escription The RV7 is an SG iron direct acting bellows sealed pressure reducing valve. The standard version has an PM diaphragm and is suitable for steam, water and air applications. The RV7 is available with a Nitrile rubber diaphragm (suffix 'N') for oil applications. Nitrile rubber soft seated version (suffix 'G', limited to 90 ) is also available for applications that require tight shut-off. t is recommended that for these applications a maximum pressure turndown ratio of 10:1 is observed. 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 T-S12-03 for details. vailable types: RV7 and RV7G are available in 6 pressure ranges (suffix 1-6). ownstream pressure ranges: Range Valve type ctuator Spring Pressure range PN type colour Rating (bar) 1 RV7(G)1(N) 1 or 1N Yellow * RV7(G)2(N) 2 or 2N Yellow ** RV7(G)3(N) 3 or 3N lue RV7(G)4(N) 4 or 4N lue RV7(G)5(N) 5 or 5N lue RV7(G)6(N) 5 or 5N Red * N32 to N50 Range , N65 to N100 Range ** N65 to N100 Range Sizes and pipe connections ½", ¾" 1", 1¼", 1½", and 2" Screwed SP (S 21 parallel), NPT also available on request. N15, N20, N25, N32, N40, N50, N65, N80 and N100. Standard flanges: N 1092 PN16 and PN25 Flanges available on request: SM 150 and JS Pressure / temperature limits Temperature Steam saturation curve 100 G F Pressure bar g The product must not be used in this region. - - Screwed and flanged N 1092 PN G Flanged N 1092 PN F Flanged SM The RV7G is limited to 90. ody design conditions PN25 Maximum design pressure 25 bar 100 RV bar g Maximum design temperature RV7G 25 bar g Minimum design temperature 0 RV bar g Maximum operating temperature RV7G 25 bar g Minimum operating temperature 0 Note: For lower operating temperatures consult Spirax Sarco N15 - N50 25 bar Maximum differential pressure N65 - N 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 Screwed ½" to 2" Flanged N15 to N100 Kvs values Size N K vs Note: The K vs values shown above are full capacities and should be used for safety valve sizing purposes where they are required. Page 1 of 6
2 Materials No. Part Material 1 ody N15 to N50 SG iron N 1693 GGG 40.3 N65 to N100 SG iron NG JS LT 2 onnet SG iron N 1693 GGG Valve seat Stainless steel S S29 N15 Stainless steel 4 Valve seat gasket N20 and N25 Mild steel N32 to N50 Reinforced exfoiliated graphite 5 Valve head RV7 Stainless steel S S29 RV7G (soft seated) Stainless steel / Nitrile S S29 6 Valve head screw N15 and N20 Stainless steel S Valve head seal rlon ush N15 and 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 Stainless steel S 316 (L) 11 alancing bellows gasket N25 to N100 Reinforced exfoiliated graphite 12 onnet gasket Reinforced exfoiliated graphite 13 onnet nuts Steel N 267 Pt13 Gr. 8 N15 to N40 M10 14 onnet studs N50 and N65 M12 Steel N 267 Pt13 Gr. 8.8 N80 and N100 M16 15 Pillars Steel zinc plated S M07 16 Pillars nuts Steel zinc plated S 3693 Gr Spring adjuster ast iron zinc plated N 1691 GG25 18 Spring(s) hrome Vanadium 19 ush (part of 20) PTF / steel composite 20 Sealing bellows assembly Stainless steel S 316(L) 21 Sealing bellows gasket N15 and N20 Stainless steel 'S' type N25 to N100 Reinforced exfoiliated graphite 22 lamp nut N25 to N100 Steel zinc plated S M07 25 Lock-nut N32 to N50 Steel zinc plated S M07 N15 to N25, N65 to N100 Steel zinc plated S 3692 Gr Spring plate Steel zinc plated S 1449 Pt1 R14 27 Needle bearing Steel 28 Setting nut Steel zinc plated S M07 29 earing plate N32 to N50 Steel zinc plated S 1449 Pt1 R14 30 irclip N32 to N50 Steel zinc plated 31 Mounting plate N25 to N50 Steel zinc plated S 1449 Pt1 R14 32 ousing Types 1(N) to 4(N) Steel N 1514 St W24 Type 5(N) Steel S N S355 J2G3 33 ousing screws Types 1(N) and 2(N) Steel zinc plated S 3692 Gr. 5.6 Types 3(N), 4(N) and 5(N) Steel zinc plated S 3692 Gr ousing nuts Types 1(N) and 2(N) Steel zinc plated S 3692 Gr. 5 Types 3(N), 4(N) and 5(N) Steel zinc plated S 3692 Gr iaphragm PM fabric reinforced iaphragm suffix 'N' Nitrile fabric reinforced 36 ex. headed bolt Stainless steel S Sealing washer Fibre 38 iaphragm clamp Stainless steel STM 351 F8M 39 Piston Steel zinc plated S 1449 Pt1 R14 40 Spindle Steel zinc plated S M07 41 Mounting nuts Steel zinc plated S 3692 Gr oupling Steel zinc plated 43 Thread insert N15 and N20 Stainless steel T Self-locking nut N25 to N100 Stainless steel S RV7 and RV7G SG ron Pressure Reducing Valves Page 2 of 6
3 6 (N15 and N20 only) * * N15 and N N65 to N *Please note: Parts numbered 10 and 11 are for N25 to N100 only N N32 to N50 RV7 and RV7G SG ron Pressure Reducing Valves Page 3 of 6
4 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 are supplied as spares. The listed parts are for the following valve types: Valve assemblies ctuator assemblies RV7 RV7G Types 1 to 5 Types 1N to 5N Stainless steel seated Nitrile soft seated PM diaphragm Nitrile diaphragm vailable spares oupling iaphragm set iaphragm and sealing washer., Needle bearing Sealing bellows set Sealing bellows assembly, sealing bellows gasket and bonnet gasket., F, G ontrol spring(s) Seat/head set Seat, seat gasket, head, bonnet gasket and head seal. J, K, L, G, Gasket set Sealing bellows gasket, bonnet gasket and seat gasket. F, G, K ow 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 RV71 pressure reducing valve. ow to fit spares Full fitting instructions are given in the nstallation and Maintenance nstructions supplied with the spare(s). K L J G F N15 and N20 RV7 and RV7G SG ron Pressure Reducing Valves Page 4 of 6
5 Spare parts for the N25 to N100 valves The spare parts available for sizes N25 to N100 valves are detailed below. No other parts are supplied as spares. The listed parts are for the following valve types: Valve assemblies RV7 Stainless steel seated RV7G Nitrile soft seated ctuator assemblies Types 1 to 5 PM diaphragm Types 1N to 5N Nitrile diaphragm vailable spares oupling iaphragm set - iaphragm and sealing washer., Needle bearing Sealing bellows set, F Sealing bellows assembly, and sealing bellows gasket. ontrol spring(s) Seat / head set N25 to N50 (1 "to 2") J, K, L, W,, G Seat, seat gasket, head, self-locking nut, head seal and bonnet gasket. ead set N65 to N100 L, W,, G, M ead, self-locking nut, head seal, bonnet gasket and balancing bellows gasket. alancing bellows set N25 to N50 N, M, G,, W, F alancing bellows assembly, balancing bellows gasket, bonnet gasket, head seal, self-locking nut, sealing bellows gasket. alancing bellows set N65 to N100 N, M, G, W, alancing bellows assembly, balancing bellows gasket, bonnet gasket, self-locking nut and head seal. Gasket set N25 to N50 (1 "to 2") F, G, K, M Sealing bellows gasket, bonnet gasket, seat gasket and balancing bellows gasket. Gasket set N65 to N100 F, G, M Sealing bellows gasket, bonnet gasket and balancing bellows gasket. ow 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 N25 RV71 pressure reducing valve. W N F L G M J L M G K W N N65 to N100 ow to fit spares Full fitting instructions are given in the nstallation and Maintenance nstructions supplied with the spare(s). F N25 to N50 RV7 and RV7G SG ron Pressure Reducing Valves Page 5 of 6
6 imensions (approximate) in millimetres Flanged Screwed ctuator type Size N 1092 SM PN SP / NPT N N N N N N N N N RV with screwed connections and Type 1 / 1N or 2/2N actuator 2 RV with flanged connections and Type 1 / 1N or 2 / 2N actuator 1 Type 3 / 3N or 4 / 4N actuator arrangement Type 5 / 5N actuator arrangement Valve weight (kg) Valve size N15 N20 N25 N32 N40 N50 N65 N80 N100 Yellow spring Weight lue spring Reduction for Screwed body Red spring ctuator weight (kg) ctuator type 1 or 1N 2 or 2N 3 or 3N 4 or 4N 5 or 5N Weight Note: To calculate the total product weight add the valve and actuator weights together. Safety information, installation and maintenance For full details see the nstallation and Maintenance nstructions (M-S12-04) supplied with the product. nstallation note: aution - To protect the actuator diaphragm on steam applications a WS4 series water seal pot must be installed in the downstream pressure signal line to the actuator. Refer to T-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 downstream temperatures below 125 the valve can alternatively be mounted vertically upwards. ow to order xample: 1 off Spirax Sarco N40 RV73 direct acting pressure reducing valve having flanged PN40 connections. Note: dd suffix 'N' if the Nitrile rubber diaphragm is required. i.e. RV73N. RV7 and RV7G SG ron Pressure Reducing Valves Page 6 of 6
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