Steam

saturati

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-P078-04

CH Issue 7

KA51, KB51 and KC51

Bronze

Self-Acting Control Valves

Description

KA51

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

KA51 Normally open

KB51 Normally open + phosphor bronze pressure balancing bellows

KC51 Normally open + stainless steel pressure balancing bellows

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.

Note: All certification / inspection requirements must be stated at

the time of order placement.

Sizes and pipe connections

KA51 and KB51: 1", 11⁄4", 11⁄2" and 2" KC51: 11⁄2" and 2"

Screwed BSP (BS 21 parallel) or NPT connections.

Pressure / temperature limits

Pressure bar g

The product must not be used in this region.

KB51 and KC51

cur ve

on

Body design conditions

Maximum design pressure

Maximum design temperature

Minimum design temperature

Maximum operating temperature

Minimum operating temperature

Note: For lower operating temperatures consult Spirax Sarco

PN25

25 bar g @ 260°C

260°C @ 10.5 bar g

-10°C

260°C @ 10.5 bar g

11⁄4"

11⁄2"

2"

3.0

2.0

1.5

9.0

8.2

6.9

-

16.0

13.8

0°C

Size

1"

Maximum differential

KA51

4.5

pressure bar

KB51 10.0

KC51

-

Designed for a maximum cold hydraulic test pressure of 38 bar g

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