|
.
walton ENGINEERING CO. LTD.
|
|
|
The valve body has three ports leading into flanged branches. Fluid flow through the valve is controlled by a rotor, the end shutters of which travel over two of the ports to direct flow to either the cooler or bypass branches, or to proportion the flow between the two. The rotor is driven by an electric actuator mounted on the valve; this is activated by a signal from the Walton electronic controller. Mechanical stops are provided to limit the travel of the actuator (60 degrees) with limit switches set to cut off supply to the motor before either motor or valve stops have been reached. In addition, a stop cast on the valve's front cover provides ultimate protection against the inlet port from being covered by the rotor. The actuator may be removed from the valve without breaking into the pressure tightness of the system. Alternatively, the actuator, its mounting and the valve's whole internal assembly can be removed without disturbing the valve's pipe connections. The ability to manually position the valve rotor is provided through a ‘flatted’ shaft protruding through the top cover of the actuator. The actuator requires a power supply of either 220/240V or 110/120V AC 50/60Hz 1 phase. |
Supplier of Temperature Control Valves and Optical ProjectorsCopyright © 2005 Walton Engineering Co. Ltd. |