44
Control systems Pressure reducing/surplussing valves
Materials (cont'd)
No.
Part
Material
9
Pilot valve chamber Pilot valve plunger
SG iron
DIN 1693 GGG 40.3
10 11 12 13 14 15 16 17 18 19 20 21 22
Stainless steel
BS 970 431 S 29 BS 970 431 S 29
Pilot valve seat with integral seal
Stainless steel + PTFE
Pilot valve ball
Stainless steel Stainless steel Stainless steel Stainless steel Stainless steel
AISI 420
Pilot valve spring
BS 2057 302 S 25 BS 1449 301 S 21 BS 1449 316 S 11 BS 970 431 S 29 BS 2056 302 S 25 BS 970 431 S 29 BS 970 431 S 29 BS 2871 C 106 ½ H DIN 1693 GGG 40.3
Pilot valve clip
Pilot filter cap gasket
Pilot filter cap
Pilot filter element
Brass
Main valve return spring
Stainless steel Stainless steel Stainless steel
Main valve
Main valve seat
Balance pipe assembly
Copper SG iron
Main valve body
Securing nuts
Steel Steel
BS 3692 Gr. 8
4.6 156
23
Main body
Securing studs
DN15 to DN32
M10 x 25 mm M12 x 30 mm
BS 4439 Gr. 8.8
DN40 and DN50
24
Main diaphragm chamber
SG iron
DIN 1693 GGG 40.3
Securing nuts
Steel Steel
BS 3692 Gr. 8
BS 3692 Gr. 8.8
25
Main diaphragm
Securing studs
DN15 to DN32
M12 x 50 mm M12 x 55 mm
DN40 and DN50 Phosphor bronze Hot brass stamping
26 27 28 29 30 32 33 34 35 36 37 38
Main diaphragms
BS 2870 PB 102
Main diaphragm plate
BS EN 12165 CW617N
Pushrod
Stainless steel
BS 970 431 S 29
Control pipe assembly
Brass and copper
Plug 1/8 " BSP
Steel Steel
Lock-nut
BS 3692 Gr. 8
Solenoid valve
Packless gland housing
Brass
BS 2874 CZ 121 ISO (BS) PF2C3 BS 970 431 S 29
Pilot valve plunger Pilot valve seat ring
Phenolic resin Stainless steel Stainless steel
Pilot valve closure member
AISI 440 B
Pilot valve housing
SG iron
DIN 1693 GGG 40.3
Securing nuts
Steel Steel
BS 3692 Gr. 8
39
Pilot valve housing
Securing studs
BS 4439 Gr. 8.8
DN15 to DN50
M10 x 25 mm
40 41 42 43 44
Locking ring
Brass
BS 2874 CZ 122 ISO (BS) PF2C3
Adjustment head
Phenolic resin Cadium plated
2 BA x ¾"
Adjustment head securing screws
Capillary tube
Copper PVC covered
Sensor
Brass
EN 12451 CW707R H130/170
TI-P470-08 CTLS Issue 5
Page 4 of 12
DP27T and DP27TE Pilot Operated Pressure/Temperature Control Valves with SG Iron Bodies
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