Direct Acting Pressure Reducing Valves - Filter
Direct Acting Pressure Reducing Valves - Filter
Direct Acting Pressure Reducing Valves - Filter
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➤<br />
D<br />
➤<br />
➤<br />
Flanged valves Screwed valves<br />
A1 ➤<br />
A2 ➤<br />
➤<br />
C<br />
Actuator weight kg (excluding valve)<br />
WS4 water seal pot = 1.7 kg (empty)<br />
WS4-3 water seal pot = 5.4 kg (empty)<br />
➤<br />
➤<br />
B<br />
➤<br />
Dimensions approximate in mm<br />
E<br />
➤<br />
➤<br />
➤<br />
Typical specification<br />
<strong>Pressure</strong> reduction shall be achieved using direct<br />
acting pressure reducing valves with stainless steel<br />
bellow stem seals and fully balanced trims for high<br />
closing differentials. Trim balancing shall be by plug<br />
balancing on sizes DN15 and DN20 and stainless steel<br />
balancing bellow on sizes DN25 to DN100.<br />
All valves shall be controlled by high quality chrome<br />
vanadium springs and fabric reinforced diaphragms.<br />
Valve bodies shall be either PN25 SG iron or PN40<br />
cast steel dependent upon the maximum operating<br />
pressure.<br />
Valve<br />
Connections<br />
BS 4504 PN40<br />
Upstream pressure range<br />
size Flanged Screwed 1 2 3 4 5 6<br />
A1 D A2 E B C B C B C B C B C B C<br />
DN15 130 97 88 38 537 305 511 250 426 208 426 168 411 143 411 143<br />
DN20 150 107 102 38 537 305 511 250 426 208 426 168 411 143 411 143<br />
DN25 160 117 134 51 546 305 520 250 435 208 435 168 420 143 420 143<br />
DN32 180 142 144 51 608 305 582 250 497 208 497 168 482 143 482 143<br />
DN40 200 152 150 62 608 305 582 250 497 208 497 168 482 143 482 143<br />
DN50 230 167 180 71 611 305 585 250 500 208 500 168 485 143 485 143<br />
DN65 290 187 - - 633 305 607 250 522 208 522 168 507 143 507 143<br />
DN80 310 202 - - 639 305 613 250 528 208 528 168 513 143 513 143<br />
DN100 350 237 - - 744 305 718 250 633 208 633 168 618 143 618 143<br />
Valve weight kg (excluding actuator)<br />
Valve size DN15 DN20 DN25 DN32 DN40 DN50 DN65 DN80 DN100<br />
Yellow / Blue spring<br />
DEP4<br />
Red spring<br />
11.0<br />
12.0<br />
12.4<br />
13.4<br />
14.6<br />
15.6<br />
19.8<br />
21.2<br />
21.2<br />
22.6<br />
25.2<br />
26.6<br />
35.5<br />
37.3<br />
41.3<br />
73.1<br />
58.3<br />
60.9<br />
Yellow / Blue spring 10.8 11.8 14.0 18.8 20.4 23.0 31.7 38.2 53.9<br />
DEP7 Red spring 11.8 12.8 15.0 20.2 21.8 24.4 33.5 40.0 56.5<br />
Reduction for<br />
screwed connections<br />
-1.7 -2.2 -2.2 -3.6 -3.9 -5.5 - - -<br />
Type 1 2 3 4 5<br />
Weight 12.3 6.5 3.9 2.5 2.6<br />
Some of the products shown may not be available in certain markets.<br />
Spirax-Sarco Limited, Charlton House,<br />
Cheltenham, Gloucestershire, GL53 8ER UK.<br />
Tel: +44 (0)1242 521361 Fax: +44 (0)1242 573342<br />
E-mail: enq@spiraxuk.attmail.com<br />
Internet: www.spirax-sarco.com<br />
© Copyright 1999 Spirax Sarco is a registered trademark of Spirax-Sarco Limited<br />
SB-S12-01 CH Issue 8<br />
DRV
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