Control systems Pressure reducing/surplussing valves
4
Materials DN15 to DN50
21
4.6 97
23
24
22
No.
Part
Material
Securing nuts
Steel
BS 3692 Gr. 8
Steel
BS 4439 Gr. 8.8
21
DN15 and DN20
M10 x 25 mm
Pilot valve housing
Securing studs
DN25 to DN50
M12 x 30 mm
DN80
M12 x 40 mm
22
Main diaphragm chamber
Cast steel
DIN 17245 GS C25
Securing nuts
Steel
BS 3692 Gr. 8
Steel
BS 3692 Gr. 8.8
DN15 and DN20
M12 x 50 mm
23
Main diaphragm
DN25 and DN32
M12 x 60 mm
Securing bolts
DN40 and DN50
M12 x 65 mm
DN80
M12 x 80 mm
24
Main diaphragms
Stainless steel
BS 1449 316 S31
For DN80 parts, see page 6
TI-P006-01 CTLS Issue 16
Page 5 of 12
DP143, DP143G, DP143H and DP143Y Pilot Operated Pressure Reducing Valves with Cast Steel Bodies
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