Control systems Pressure reducing/surplussing valves
4
Materials DPP17E
2 1 3 4 5
12 6
8 7 9 11 13 14 16 10
15
4.6 121
* Note: This product is also available in cast steel.
No.
Part
Material
1 2 3
Adjustment screw
Steel
BS 3692 Gr. 8.8
Adjustment lock-nut
Steel
BS 3692 Gr. 8
Washer
Stainless steel
BS 1449 304 S 16
4 *
Spring housing
SG iron
DIN 1693 GGG 40
5 6 7
Top spring plate
Brass
BS 2872 CZ 122
Pressure adjustment spring
Stainless steel
BS 2056 302 S 25
Bottom spring plate
Brass
BS 2872 CZ 122
BS 4439 Gr. 8.8 BS 3692 Gr. 8
8
Spring housing securing studs and nuts
Steel M10 x 50 mm
9
Pilot diaphragms
Phosphor bronze
BS 2870 PB 102 1980
10 *
Pilot valve housing
SG iron
DIN 1693 GGG 40.3
11
Pilot valve plunger
Stainless steel
BS 970 431 S 29
12
Spring housing cover
Stainless steel
BS 1449 304 S 12 2A
Pilot valve and seat unit
Stainless steel
BS 970 431 S 29
13
Filter element (not shown)
Brass
14 15 16
Internal strainer
Stainless steel
BS 1449 304 S 16
Body gasket
Reinforced exfoliated graphite
Main valve return spring
Stainless steel
BS 2056 302 S 25
Materials continued on next page
TI-P208-01 CTLS Issue 4
Page 3 of 9
DPP17E and DPP17EE Pilot Operated Pressure Reducing Valves with SG Iron Bodies
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