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The WCB is available with two actuation methods, either airtube or piston. The airtube type is preferred over the piston for several reasons. The reinforced neoprene airtube accurately reacts to small pressure changes as the design offers no resistance to movement. The airtube is corrosion resistant and no special coatings or treatments are required. Field service is simple and error free.

Retrofit kits are available to convert an existing single or dual piston actuated WCB to airtube actuation with no other modifications required. The airtube will give a smoother response therefore enhancing the control of the WCB.