Control systems Pressure reducing/surplussing valves
4
Materials
13
6
5
4
7
2
8
9
3
11
1
12
4.6 23
10
No.
Part
Material
DIN 1693 GGG 40.3 ELNP coated
1
Body assembly
SG iron
2 3 4 5 6 7 8 9
Pressure adjustment control spring
Silicon chrome
BS 2803 685 A55
Adjustment screw
Carbon steel
BS 970 230 M07
Plain washer
Stainless steel
Gr.18/10/3-4A
Adjustment knob
Mineral filled nylon 66
10B 140
Spirol pin
Chrome plated stainless steel
AISI 420
Spring plate
Cast iron
DIN 1691 GG 20
Spring housing
Aluminium
2ELNP coated
Upper gasket
Semi-rigid graphite laminated
10
Lower gasket
Semi-rigid graphite laminated
11
Bellows assembly
Stainless steel
316L
12 13
Bellows/pushrod assembly
Stainless steel/PTFE 15% graphite fill
316L
Printed cap
Polypropylene
Materials continued on next page
TI-P210-01 CTLS Issue 6
Page 3 of 7
BRV71 and BRV73 SG Iron Pressure Reducing Valves
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