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Control systems Pressure reducing/surplussing valves
Interchangeability of spares The following table shows how in certain sizes some parts are interchangeable. For example in the line headed 'Main diaphragm' the diaphragm used in the following sizes: DN15LC, DN15 and DN20 (½" and ¾") is common to these sizes by the letter 'a'. The letter 'b' indicates that sizes DN25 and DN32 (1" and 1¼")use one common diaphragm. Some parts, particularly pilot and main valve assemblies are specific to particular models e.g 'DP163G'. Interchangeability is therefore restricted to model type for some parts. Please note for storage purposes: The spare parts marked † are not of the same material as those for the DP143, consequently they are not compatible for interchangeability.
** DN15 (½")
Size
DN15LC (½")
DN20 (¾")
DN25 (1")
DN32 (1¼")
DN40 (1½")
DN50 (2")
DN80 (3")
Main diaphragm
a
a
a
b
b
c
c
d
Pilot diaphragm
a
a
a
a
a
a
a
a
Pilot valve seal assembly
a
a
a
a
a
a
a
a
Pilot valve and plunger assembly
a
a
a
a
a
a
a
a
Main valve assembly
a
b
c
d
e
f
g
h
Main valve return spring
a
a
a
b
b
c
c
d
Pressure adjustment spring
a
a
a
a
a
a
a
a
Control pipe assembly
† † † †
a
a
b
c
d
e
f
g
Balance pipe assembly
a
a
b
c
d
e
f
g
4.6 118
Body gasket
a
a
a
b
b
c
c
d
Set of spring housing securing studs and nuts
a
a
a
a
a
a
a
a
Set of pilot valve housing securing studs and nuts † Set of diaphragm chamber securing bolts and nuts †
a
a
a
b
b
c
c
d
a
a
a
b
b
c
c
d
Set of main body studs and nuts
†
−
−
−
−
−
−
−
a
** Not available for the DP163G
TI-P107-01 CTLS Issue 13
Page 14 of 14
DP163, DP163G and DP163Y Pilot Operated Pressure Reducing Valve with Stainless Steel Bodies
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