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6. Spare parts
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 DP27T and where
marked † are interchangeable with the 37D temperature control.
Size DN
Screwed Flanged
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 assembly a a a a a a a a a b b
Pilot filter element 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 screen 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
†
†
†
†
†
†
†
†
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