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-P078-05
CH Issue 7
KX43 and KY43
Steel
Self-acting Control Valves
Description
The KX and KY 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
KX43 Normally closed
Normally closed. This valve incorporates a pressure
KY43 balancing bellows, which 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
A
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.
Size and pipe connections
KX43 DN15, DN20, DN25, DN32, DN40 and DN50
KY43 DN32, DN40 and DN50
Flanged EN 1092 PN25 and PN40, ASME 300 and BS 10 Table H.
The following flange connection is available on request: ASME 150.
KX43
DN40 and DN50
shown
Steam
saturation
curve
C
B
KY43
PN40
40 bar g @ 120°C
300°C @ 25.8 bar g
300°C @ 10.0 bar g
-10°C
300°C @ 25.8 bar g
300°C @ 10.0 bar g
0°C
Note: For lower operating temperatures consult Spirax Sarco
Body design conditions
Maximum design pressure
Maximum design
temperature
A - B
A - C
Minimum design temperature
Maximum operating
A - B
temperature
Minimum operating temperature
A - C
Size DN15 DN20 DN25 DN32 DN40 DN50
Maximum
differential
pressure bar KY43
-
-
-
9.0
8.2
6.9
KX43 12.0 7.0
3.5
2.3
1.7
1.1
Designed for a maximum cold hydraulic test pressure of 60 bar g
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