Description

The KX51 and KY51 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 EL3500 Series electric actuator with a

suitable temperature transmitter and controller.

Available types

KX51 Normally closed.

KY51 Normally closed.

The valve incorporates a pressure balancing bellows,

which enables the valve to operate against higer differential

pressures.

Optional extras

Fixed bleed bypass for water systems.

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

Optional

extra

KX51

Size 1"

4.5.40

KX51

1"

KY51

11⁄4" 11⁄2"

2"

11⁄4" 11⁄2"

2"

Screwed

BSP (BS 21 parallel) or NPT

Pressure/temperature limits

Steam

saturation

curve

Pressure bar g

The product must not be used in this region.

Optional extra

Body design conditions

Maximum design pressure

Maximum design temperature

Minimum design temperature

Maximum operating pressure for saturated steam service 17.5 bar g

KY51

Optional extra

Maximum operating temperature

Minimum operating temperature

1"

260°C @ 10.5 bar g

0°C

Size

differential

KX51

11⁄4"

11⁄2"

2"

Maximum

pressure bar

KY51

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

3.5

-

2.3

1.7

1.1

9.0

8.2

6.9

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

KX51 and KY51

Bronze

Self-acting Control Valves

PN25

25 bar g @ 120°C

260°C @ 10.5 bar g

-10°C

KX51

Sizes 11⁄4" - 2"

TI-P078- 03

CH Issue 10

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