Marerials

No. Part

14 Internal strainer

15 Body gasket

16

Main valve

return spring

17 Main valve

18

Main valve

seat

20

Main valve

body

Main body

21 securing studs

and nuts

22

Main diaphragm

chamber

Main diaphragm

23 securing bolts

and nuts

24 Main diaphragms

25

Main diaphragm

plate

26 Push rod

27 Pipe assembly

28 Plug 1" BSP

Material

43

Union

kit

W

V

U

W

V

4.4.23

30

34

Packless gland

housing

35

Pilot valve

plunger

36

Pilot valve

seat ring

37

Pilot valve

closure member

38 Pilot valve housing

Pilot valve housing

39 securing studs

and nuts

40 Locking ring

41 Control head

42

Control head

securing screws

43 Capillary tube

44 Sensor

Optional extras

BS 1492 Gr. 8.8

BS 1492 Gr. 8

BS 2870 PB 102

BS 2872 CZ 122

BS 970 431 S 29

BS 1492 Gr. 8

BS 2874 CZ 121

S 67S

BS 970 431 S 29

AISI 440 B

DIN 1693 GGG 40.3

42

37

38

15

16

17

Lock-nut

Stainless steel

Reinforced exfoliated graphite

Stainless steel

Stainless steel

Stainless steel

BS 2056 302 S 25

BS 970 431 S 29

BS 970 431 S 29

DIN 1693 GGG 40.3

BS 4439 Gr. 8.8

BS 1492 Gr. 8

Pocket

SG iron

Steel (M10 x 25 mm)

40

41

35

34

39

36

14

42

42

SG iron

DIN 1693 GGG 40.3

Steel (M12 x 50 mm)

Phosphor bronze

Brass

Stainless steel

Brass and copper

Steel

Steel

Brass

Bakelite synmould

Stainless steel

Stainless steel

SG iron

Steel (M10 x 25 mm)

Brass

Bakelite synmould

BS 4439 Gr. 8.8

BS 1492 Gr. 8

BS 2874 CZ 121

S 67S

37D version shown

Glass

pocket

Control valves

Positioners and controllers

Stainless steel (2 BA x 3⁄4")

Copper PVC covered

Brass

EN 12451 CW707R H130/170

1

7

212

4

25

28

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 3⁄4" BSP.

Pockets: Are available in copper with brass union nipple or

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 3⁄4" BSP.

Special long pockets are available having minimum length of

0.5 m and a maximum of 1 m. They are sealed at the top by a

rubber bung. Glass pockets are also available complete with

bracket and sealed by a rubber bung.

Wall mounting bracket: Inclusive of cover.

Safety information, installation and maintenance

For full details see the Installation and Maintenance Instructions

(IM-P102-04) supplied with the product.

How to order

Example: 1 off Spirax Sarco DN20 37D pilot operated temperature

control valve having a temperature range A. The flange connections

are to be ANSI 300.

BS 1449 304 S 16

Page 2 of 5

37D and 37DE Pilot Operated Temperature Control Valve with SG Iron Body

TI-P102-01 CH Issue 4

Page 2 of 5

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