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Control systems Positioners and controllers
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 marked † are interchangeable with the DP17 pressure reducing valve. Spares marked 'o' are interchangeable with the DP17T and DP17TE pilot operated pressure/temperature control valves.
Screwed Flanged ½"LC ½" ¾" 1" 15LC 15 20 25 32 40 50
Size DN
Maintenance kit
a a a b f
f
a b c
d e
Main diaphragm
†oaaabaaabbc
c
Pilot valve assembly
†oaaaaaaaaaaa
Pilot valve packless gland set
†oaaaaaaaaaaa
Main valve assembly
†oa bcda b c
d e f
g
Internal strainer
† o a a a b f
f
a b c
d e
Main valve return spring
†oaaabaaabbc
c
Control head
oaaaaaaaaaaa
'O' ring for sensor bulb adaptor
oaaaaaaaaaaa
Control pipe assembly
a a a b f
f
a b c
d e
Gasket set
†aaaaaaaaabb
4.4 54
Set of pilot valve housing securing studs and nuts
†aaaaaaaaabb
Set of main body studs and nuts
†oaaaaaaaaabb
Set of diaphragm securing bolts and nuts
†oaaaaaaaaabb
Set of control head securing screws
†oaaaaaaaaaaa
TI-P102-01 CTLS Issue 8
Page 8 of 8
37D and 37DE Pilot Operated Temperature Control Valve with SG Iron Body
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