Materials

No. Part

1

Body

2

Spring

housing

3

Cap

4

Valve seat

5

Valve

6

Diaphragm

7

'O' ring

8

'O' ring

9

'O' ring

Material

Stainless

steel

Stainless

steel

Stainless

steel

Stainless

steel

Stainless

steel

EPDM/PTFE

EPDM

EPDM

EPDM

Stainless

steel

Stainless

steel

Stainless

steel

Stainless

steel

Stainless

steel

Stainless

steel

Fluoraz

(FEPM) =

Werkstoff

No.

1.4404

1.4404

1.4571

1.4404

1.4404

1.4571

1.4571

1.4310

1.4404

AISI 300

series

AISI

Equivalent

316L

316L

316Ti

316L

316L

316Ti

316Ti

301*

316L

16

3

9

5

4

1

4.6.37

10

11 Top spring

plate

12 Spring

13 Adjustment

screw

14 V band

clamp

15 Flange (not

shown)

7

6

11

2

12

17

13

Piston

Control valves

Pressure reducing/surplussing valves

1.4404

316L

1.4301

304

* Not a direct equivalent, nearest AISI specification is given.

=

For hydrocarbon applications an optional soft seal is available in FPM (Viton) - please consult Spirax Sarco.

16 Soft seal

17 Spring clip

Stainless

steel

Page 2 of 5

TI-P186-01 CH Issue 10

SRV461S and SRV463S Stainless Steel Direct Acting Pressure Reducing Valves

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