Piston valve

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(Steam Eng.) a slide valve, consisting of a piston, or connected pistons, working in a cylindrical case which is provided with ports that are traversed by the valve.

See also: Piston

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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References in periodicals archive
In a piston pump, the piston is fitted with a non-return valve (the piston valve) and slides vertically up and down within a cylinder that is also fitted with a non-return valve (the foot valve).The disk is rotating to the piston is move on upward and downward.
It employs a high-performance CLASS 800 piston valve comprised of upper and lower valve rings made of alternating layers of stainless steel and graphite that provide tight sealing, suitable for PMA to 725 psig and PMO 725 psig.
The enhanced 810 Series angle body piston valve can be used in a variety of industrial applications including chemical, pharmaceutical, steam, food processing, water technology, and HVAC.
The company currently offers the Skinner, Gold Ring, R Series, Sinclair Collins and new Angle Body Piston Valve lines.
The range includes piston valve designs, piston inline designs and paddle designs for flow control, plus a float switch for level control.
Company's Angle Body Piston Valve line is ideal for applications in the steam and food processing, chemical, pharmaceutical and related industrial markets.
The angle body piston valve line has applications in the chemical, pharmaceutical, food processing, HVAC, and related industrial markets.
The piston valve sealing area does not come into contact with the flow medium.
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