Control systems Pressure reducing/surplussing valves
4
DN15 to DN50
Materials
1 2 3 4 5 6
12
8 9
7
10 11
4.6 131
No.
Part
Material
1 2 3 4 5 6 7
Adjustment screw
Steel
BS 3692 Gr. 8.8
Adjustment lock-nut
Steel
BS 3692 Gr. 8
'C' washer
Stainless steel
BS 1449 304 S16
Spring housing
Cast steel
DIN 17245 GS C25
Top spring plate
Steel
BS 970 220 Mo7
Pressure adjustment spring
Stainless steel
BS 2056302 S25
Bottom spring plate
Steel
BS 970 220 Mo7
Securing nuts
Steel
BS 3692 Gr. 8
8
Spring housing
Steel
BS 4439 Gr. 8.8
Securing studs
DN15 to DN80
M10 x 30 mm
9
Pilot diaphragm
Stainless steel
BS 1449 316 S31
DIN 17245 GS C25 GP 240 GH + N
10
Pilot valve housing
Steel
11
Pilot valve plunger
Stainless steel
BS 970 431 S29
12
Spring housing cover
Stainless steel
BS 1449 304 S12
For DN15 to DN50, parts 13 to 30, see pages 4 and 5
For DN80 parts, see page 6
TI-P004-01 CTLS Issue 8
Page 3 of 12
SDP143 Pilot Operated Pressure Surplussing Valve with Cast Steel Body
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