Control valves

Pressure reducing/surplussing valves

ISO 9001

TI-S12-03

CH Issue 5

Cert. No. LRQ 0963008

Description

WS4

Water Seal Pot

To be used in conjunction with the DRV or DEP direct acting

pressure control valves when process temperature exceeds the

maximum operating temperature of the actuator.

For applications where there is rapid fluctuation of pressures or

loads the WS4-3 is recommended.

Available types

WS4 The WS4 is for normal applications up to a volume of 1 litre.

WS4-3

The WS4-3 has a larger 3 litre volume and is recommended

where there is rapid fluctuation of pressure or load.

B

A

Sizes and pipe connections

2

4

WS4

1

3

Screwed

Inlet

Screwed

Butt weld

Outlet Screwed

WS4

"

BSP Male BS 21

"

NPT Male

WS4-3

1⁄2" BSP Male BS 21

1⁄2" NPT Male

WS4

DN10

WS4-3 DN15

"

BSP Female BS 21 with 8 mm

compression fitting.

Pressure / temperature limits

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B

WS4-3

Steam

saturati

curve

on

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Pressure bar g

The product must not be used in this region.

Body design conditions

Maximum design pressure

Maximum design temperature

Minimum design temperature

Maximum operating pressure

for saturated steam service

Maximum operating temperature

Minimum operating temperature

PN25

25 bar g @ 120°C

225°C @ 21 bar g

0°C

21 bar g

225°C @ 21 bar g

0°C

Note: For lower operating temperatures consult Spirax Sarco

A

Dimensions / weights (approximate) in mm and kg

Designed for a maximum cold hydraulic test pressure of 40 bar g

Note: With internals fitted, test pressure must not exceed 25 bar g

Materials

No. Part

1

Housing

2

Connector

3

Coupling

4

Plug

5

Tube

Material

Carbon steel

Steel

Steel zinc plated

Steel

Carbon steel

A

WS4

127

WS4-3

127

Available spare

Part No. 3 - Coupling

B

Weight

157

1.6

365

5.4

DIN 1614 St W24

DIN 1629 St 52

How to order

Example: 1 off Spirax Sarco " WS4 water seal pot having screwed

BSP connections.

Local regulations may restrict the use of this product to below the conditions quoted.

In the interests of development and improvement of the product, we reserve the right to change the specification without notice.

© Copyright 2007

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