44
Control systems Pressure reducing/surplussing valves
Available spares
Coupling
A
Diaphragm set Diaphragm and sealing washer.
W
B , C
Needle bearing
D
L
H
Sealing bellows set Sealing bellows assembly, and sealing bellows gasket.
E , F
G
Control spring(s)
I
M
Seat / head set DN25 to DN50 Seat, seat gasket, head, self-locking nut, head seal and bonnet gasket. Head set DN65 to DN100 Head, self-locking nut, head seal, bonnet gasket and balancing bellows gasket. Balancing bellows set DN25 to DN50 Balancing bellows assembly, balancing bellows gasket, bonnet gasket, head seal, self-locking nut, sealing bellows gasket. Balancing bellows set DN65 to DN100 Balancing bellows assembly, balancing bellows gasket, bonnet gasket, self-locking nut and head seal. Gasket set DN25 to DN50 Sealing bellows gasket, bonnet gasket, seat gasket and balancing bellows gasket. Gasket set DN65 to DN100 Sealing bellows gasket, bonnet gasket and balancing bellows gasket.
J, K, L, W, H, G
N
L , W , H , G , M
I
N , M , G , H , W , F
E
4.6 54
N, M, G, W, H
F
F, G, K, M
D
F, G, M
How to order spares Always order spares by using the description given in the column headed 'Available spares' and state the size and type of valve. Example: 1 - Gasket set for a Spirax sarco DN25 DRV7B1 pressure reducing valve. How to fit spares Full fitting instructions are given in the Installation and Maintenance Instructions supplied with the spare(s).
B
C
A
DN65 to DN100
TI-P204-01 CTLS Issue 15
Page 8 of 10
DRV7 and DRV7G SG Iron Pressure Reducing Valves
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