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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 screwed valves ½" and ¾"
is common to these sizes by the letter 'a', the letter 'c' indicates that one diaphragm is
common to the DN40 and DN50 valves. All spares are interchangeable with the DP17T and
where marked † are interchangeable with the 37D temperature control.**
** Note: This does not apply to DP17G soft seat pilot valve or main valve assemblies.
Screwed Flanged
*** ***
Size DN ½"LC ½" ¾" 1" 15LC 15 20 25 32 40 50
Maintenance kit a a a b f f a b c d e
Main diaphragm a a a b a a a b b c c
Pilot diaphragms † a a a a a a a a a a a
Pilot valve chamber
assembly
a a a a a a a a a b b
PTFE seals a a a a a a a a a a a
Main valve assembly † a b c d a b c d e f g
Internal strainer † a a a b f f a b c d e
Main valve return spring † a a a a a a a a a c c
Pressure adjustment
spring
a a a a a a a a a a a
Control pipe assembly † a a a b f f a b c d e
Balance pipe assembly a a a b f f a b c d e
Body gasket † a a a a a a a a a b b
Set of spring housing
securing studs and nuts
a a a a a a a a a b b
Set of main body studs
and nuts
† a a a a a a a a a b b
Set of diaphragm
securing bolts and nuts
† a a a a a a a a a b b
Pushrod and main
diaphragm plate
assembly
a a a b a a a b b c c
*** Not available for DP17G
6. Spare parts
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