Control valves
Pressure reducing/surplussing valves
4.6.113
Screwed
1⁄2"LC
1⁄2"
3⁄4"
1"
15LC
15
20
25
32
40
a
a
a
b
f
f
a
b
c
d
a
a
a
b
a
a
a
b
b
c
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
b
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
b
c
d
a
b
c
d
e
f
a
a
a
b
f
f
a
b
c
d
a
a
a
a
a
a
a
a
a
c
a
a
a
a
a
a
a
a
a
a
a
a
a
b
f
f
a
b
c
d
a
a
a
b
f
f
a
b
c
d
a
a
a
a
a
a
a
a
a
b
a
a
a
a
a
a
a
a
a
b
a
a
a
a
a
a
a
a
a
b
a
a
a
a
a
a
a
a
a
b
a
a
a
b
a
a
a
b
b
c
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)
* Pilot diaphragm
(2 off)
* Pilot valve assembly inclusive of filter element (Pilot valve chamber assembly for the DP27G and DP27GY)
A
B
C
E, F
E
K, L
M
N
O
P
Q
R
R1
S
T
V
Y
W
X1
X2
* Pilot filter element and cap gasket
(Not required for the DP27G and DP27GY)
Main valve assembly
* Internal strainer
Main valve return spring
Pressure adjustment spring (Not required for DP27R)
* Control pipe assembly
* Balance pipe assembly
* Body gasket (3 off)
Pilot valve block gasket (DP27R only)
Set of spring housing / actuating chamber cover securing studs and nuts
Set of main body studs and nuts
Set of diaphragm securing bolts and nuts
Pushrod and main diaphragm plate assembly
Type DP27E only
Solenoid valve complete
Replacement coil
Valve seat and core assembly
How to order spares
(packet of 3 off each)
DP27G and DP27GY only - PTFE seals (packet of 6)
DP27, DP27E and DP27G
DP27Y and DP27GY
0.2 to 17 bar
0.2 to 3 bar
(set of 10)
(set of 12)
(set of 4)
(set of 4)
Valve sizes
1⁄2" - DN32
DN40 and DN50
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 1" Spirax Sarco Type DP27 pressure reducing valve.
How to fit. See Installation and Maintenance Instructions supplied with the pressure reducing valve. Further copies are available on
request.
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 1⁄2" and 3⁄4" 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.**
** Note: This does not apply to the DP27G and DP27GY soft seat pilot valve or main valve assemblies.
Flanged
Size DN
50
Maintenance kit
Main diaphragm
† Pilot diaphragms
Pilot valve chamber assembly
Pilot filter element
Pilot filter cap gaskets
PTFE seals
† Main valve assembly
† Internal strainer
† Main valve return spring
Pressure adjustment spring
† Control pipe assembly
Balance pipe assembly
† Body gasket
Set of spring housing securing studs and nuts
† Set of main body studs and nuts
† Set of diaphragm securing bolts and nuts
Pushrod and main diaphragm plate assembly
TI-P470-01 CH Issue 10
DP27, DP27E, DP27G, DP27GY, DP27R and DP27Y Pilot Operated Pressure Reducing Valves with SG Iron Bodies
e
c
a
b
a
a
a
g
e
c
a
e
e
b
b
b
b
c
Not available for the DP27G or the DP27GY
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