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walton ENGINEERING CO. LTD.

Pneumatically Operated

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Applications (Pneumatic)

In a pneumatically controlled system, the valve and temperature sensor are independently located. The position of the controlling mechanism is determined by an air pressure signal supplied by a controller which in turn is regulated by a temperature sensor. Clean, dry air at 3-7 bar is required.

The principle advantages of pneumatic over direct operated valves are:

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Increased flexibility in application

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In sea water circuits the separation of the main operating mechanism from the circulating fluid will minimise corrosion problems.

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Increase in power and speed of operation

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The ability to sense the temperature remote from the valve.

Sizes range from 40mm (1.5") bore to 350mm (14") diameter.  The flow rates that these valves can accommodate are shown here.

The valve can be supplied to any one of six possible handings to suit the piping arrangement.

Provision for manual operation is a standard feature of the Walton pneumatically operated valve.

The 3-way valve body is of the standard Walton type and interchangeable with the bodies used for the range of direct operated valves.  This means that it is a simple matter to convert a valve from direct to pneumatic operation, and this can usually be achieved without removing the valve body from the system or modifying the pipework.

A description of the pneumatic controllers is shown here. 

 

Supplier of Temperature Control Valves and Optical Projectors
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