Control valves

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

Pressure reducing/surplussing valves

In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2016

TI-P006-01

CH Issue 13

DP143, DP143G, DP143H and DP143Y

Pilot Operated

Pressure Reducing Valves with Cast Steel Bodies

Description

The DP143, DP143G, DP143H and DP143Y pilot operated pressure reducing valves have been manufactured using cast steel.

DP143

DP143G

Available types

DP143H

DP143Y

Suitable for steam applications

Is a soft seal version available for compressed air and inert industrial gases. Note: It is not recommended

for oxygen service.

Is a high temperature version for use up to 350 °C.

Having a lower rate pressure control spring, making it suitable for steriliser/autoclave applications

Sizes and pipe connections

DN15LC - Low Capacity version, DN15, DN20, DN25, DN32, DN40, DN50 and DN80.

Standard flanges:

EN 1092 PN40, BS 10 Table 'J' and ANSI 300.

Available on request: ANSI 150 and JIS 20.

Kv values

The Kv maximum values shown below are full capacities and should be used for safety

valve sizing purposes only.

DN15LC DN15

DN20

DN25

1.0

2.8

5.5

8.1

For conversion:

Cv (UK) = Kv x 0.963

Cv (US) = Kv x 1.156

DN32

DN40

12.0

17.0

DN50

DN80

28.0

64.0

Note: Where the internal balance pipe is used the valve capacity will be reduced.

Page 1 of 7

Page 1 of 9

4.6.64