Control systems Pressure reducing/surplussing valves
4
Materials - DP27 and DP27Y (continued)
23
17
19
20 24 18
4.6 169
21 22
25 19
No.
Part
Material
17
Pilot filter element
Brass
18 19 20
Internal strainer
Stainless steel
ASTM A240 TP 304
Body gasket
Stainless steel reinforced exfoliated graphite
Main valve return spring
Stainless steel
BS 2056 302 S 26
21
Main valve
Stainless steel
BS 970 431 S 29
22
Main valve seat
Stainless steel
BS 970 431 S 29
23
Balance pipe assembly
Copper
BS 2871 C 106 ½H
24
Main valve body
SG iron
BS EN 1563 EN-GJS-400-18-LT (5.3103)
Securing nuts
Steel
BS 3692 Gr. 8
Steel
BS 4439 Gr. 8.8
25
Main body
Securing studs
DN15 to DN32
M10 x 25 mm
DN40 and DN50
M12 x 30 mm
TI-P470-01 CTLS Issue 13
Page 5 of 16
DP27, DP27E, DP27G, DP27GY, DP27R & DP27Y Pilot Operated Pressure Reducing Valves with SG Iron Bodies
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