Steam

Control valves

Self-acting controls

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 2015

TI-P078-06

CH Issue 6

KA43, KB43 and KC43

Steel

Self-acting Control Valves

Description

The KA, KB and KC range of two-port valves are used in conjunction

with Spirax Sarco SA control systems to provide a self-acting

temperature control unit.

Alternatively, they can be used as electrically actuated

temperature control valves by fitting an EL7200 Series electric

actuator with a suitable temperature transmitter and controller.

Available types

KA43 Normally open with flanged connections.

KB43

Normally open with phosphor bronze pressure balancing

bellows with flanged connections.

KC43

Normallyopenwithstainlesssteelpressurebalancing bellows

with flanged connections.

Note: Pressure balancing bellows enables the valve to operate

against higher differential pressures.

Standards

These products fully comply with the requirements of the

European Pressure Equipment Directive 97/23/EC and carry

the

mark when so required.

Certification

As standard these products are available with a manufacturers’

Typical Test Report. Additionally, at extra cost, certification to

EN 10204 3.1 can be supplied. Note: All certification/inspection

requirements must be stated at the time of order placement.

Pressure / temperature limits

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A

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Size and pipe connections

KA43 DN15, DN20, DN25, DN32, DN40 and DN50

KB43 DN25, DN32, DN40 and DN50

KC43 DN32, DN40 and DN50

Standard flanges:

EN 1092 PN25 and EN 1092 PN40,

ASME 300 and BS 10 Table H.

The following flanges are available on request: ASME 150.

KA43

saturation

curve

C

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B

Pressure bar g

The product must not be used in this region.

A - B Flanged EN 1092 PN40, ASME 300 and BS 10 Table H.

A - C Flanged EN 1092 PN25 and ASME 150.

Body design conditions

Maximum design pressure

Maximum design temperature

Minimum design temperature

PN40

40 bar g @ 20°C

300°C @ 25.8 bar g

-10°C

300°C @ 25.8 bar g

300°C @ 10.0 bar g

Maximum operating temperature

Minimum operating temperature

A - B

A - C

KB43

and

KC43

0°C

Note: For lower operating temperatures consult Spirax Sarco

Maximum

differential

pressure

bar

Size DN15 DN20 DN25 DN32 DN40 DN50

KA43 17.0 10.0

4.5

3.0

2.0

1.5

KB43

-

-

10.0

9.0

8.2

6.9

KC43

-

-

-

16.0 16.0 13.8

Designed for a maximum cold hydraulic test pressure of 24 bar g

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