44
Control systems Positioners and controllers
Materials No. Part
Material
14 15 16
Internal strainer
Stainless steel
BS 1449 304 S 16
Body gasket
Reinforced exfoliated graphite
Main valve return spring
Stainless steel
BS 2056 302 S 25
17
Main valve head
Stainless steel
BS 970 431 S 29
18
Main valve seat
Stainless steel
BS 970 431 S 29
20
Main valve body
SG iron
DIN 1693 GGG 40.3
BS 4439 Gr. 8.8 BS 1492 Gr. 8
21
Main body securing studs and nuts
Steel (M10 x 25 mm)
22
Main diaphragm chamber
SG iron
DIN 1693 GGG 40.3
BS 1492 Gr. 8.8 BS 1492 Gr. 8
23
Main diaphragm securing bolts and nuts Steel (M12 x 50 mm)
24
Main diaphragms
Phosphor bronze
BS 2870 PB 102
25
Main diaphragm plate
Hot brass stamping
BS EN 12165 CW617N
26
Push rod
Stainless steel
BS 970 431 S 29
27
Pipe assembly
Brass and copper
4.4 48
28 30 34 35 36
Plug 1" BSP
Steel
Lock-nut
Steel
BS 1492 Gr. 8
Packless gland housing
Brass
BS 2874 CZ 121
Pilot valve plunger
Bakelite synmould
S 67S
Pilot valve seat ring
Stainless steel
BS 970 431 S 29
37
Pilot valve closure member
Stainless steel
AISI 440 B
38
Pilot valve housing
SG iron
DIN 1693 GGG 40.3
BS 4439 Gr. 8.8 BS 1492 Gr. 8
39
Pilot valve housing securing studs and nuts Steel (M10 x 25 mm)
40
Locking ring
Brass
BS 2874 CZ 121
41
Control head
Bakelite synmould
S 67S
42
Control head securing screws
Stainless steel (2 BA x ¾")
43 44
Capillary tube
Copper PVC covered
Sensor
Brass
EN 12451 CW707R H130/170
Optional extras Conversion kit: A standard kit comprising of a solenoid valve and the necessary pipe and fittings for converting an existing 37D to a 37DE temperature control valve. Capillary tubes: Available in multiples of 2 m up to a max. of 14 m. Union kit: Comprising of union nipple (U), compression ring (V) and a gland nut (W). The union nipple is screwed ¾" BSP. Pockets: Are available in stainless steel. Union nipple U forms the top of the pocket and carries compression ring V and gland nut W. The union nipple is screwed ¾" BSP. Wall mounting bracket: Inclusive of cover.
Safety information, installation and maintenance For full details see the Installation and Maintenance Instructions (IM-P304-01) supplied with the product.
TI-P102-01 CTLS Issue 8
Page 2 of 8
37D and 37DE Pilot Operated Temperature Control Valve with SG Iron Body
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