KA31, KA33, KB31, KB33 and KC31 Cast Iron Self-acting Control
The KA, KB, and KC 2-way control valves are used in conjunction with Spirax-Sarco thermostats for autonomous temperature control.
Available Types:- KA31 with single seat, normally open, threaded connections
- KA33 with single seat, normally open, flange connections
- KB31 with single seat, normally open, threaded connection, and balanced by phosphor bronze bellows membrane
- KB33 with single seat, normally open, flange connections, and balanced by phosphor bronze bellows membrane
- KC31 with single seat, normally open, threaded connections, and balanced by stainless steel bellows membrane.
The bellows membrane ensures that these devices can operate against a greater differential pressure.
Standards:
These products fully comply with the European Pressure Equipment Directive (PED).
Certificates:
These products are available with a Type Test Report. Certificates are provided only if explicitly specified when ordering.
Pressure and Temperature Limits:
see datasheet
Diameters and Connections:
Threaded connections BSP (BS 21 parallel) or NPT:- KA31: , , 1, 1 , 1 , and 2
- KB31: 1, 1 , 1 , and 2
- KC31: 1 and 2
Standard flanges according to EN 1092 PN16:
- KA33: DN15, DN20, DN25, DN32, DN40, and DN50
- KB33: DN25, DN32, DN40, and DN50
