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Control systems Pressure reducing/surplussing valves
Spare parts
Available spares Maintenance kit A stand-by set of spares for general maintenance purposes and covers all spares marked * * Main diaphragm (2 off)
A B C
* Pilot diaphragm
(2 off)
Pilot valve seal assembly
* Pilot valve and plunger assembly
D, E
F, H
Main valve assembly
* Main valve return spring
G
Red
DP143, DP143G, DP143H 0.2 to 17 bar
J
Pressure adjustment spring
Grey
DP143, DP143G, DP143H 16 to 24 bar
K
Control pipe assembly
M, N
Balance pipe assembly
* Body gasket
O
(packet of 3)
* Set of spring housing securing studs and nuts
P
(set of 4)
4.6 102
* Set of pilot valve housing securing studs and nuts
Q
(set of 4)
(set of 10)
DN15 and DN20
(set of 12)
DN25 and DN32
R
Set of diaphragm chamber securing bolts and nuts
(set of 16)
DN40 and DN50
(set of 20)
DN80
T
Set of main body studs and nuts (DN80)
(set of 6)
V, W, X
Pushrod and main diaphragm plate assembly
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 pressure reducing valve.
Example: 1 - Main valve assembly for a Spirax Sarco DN15 DP143 pressure reducing valve.
How to fit See the Installation and Maintenance Instructions supplied with the pressure reducing valve. Further copies are available on request.
'Interchangeability of spares' is on page 12
TI-P006-01 CTLS Issue 16
Page 10 of 12
DP143, DP143G, DP143H and DP143Y Pilot Operated Pressure Reducing Valves with Cast Steel Bodies
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