Flush Piston Bottom Outlet Valves - invented by SchuF

SchuF is the inventor of the Piston Bottom Outlet Valve (Patent received in 1926). They are most commonly used to quickly drain or inject media into or out of vessels, tanks or reactors.

Ram Bottom Outlet Valve

Bottom outlet drain valve - Ram design with Super Closure feature, Photo:©SchuF


Download Piston Valve/ Ram valve documents


Applications for Piston/Ram Valves

Piston or Ram valves are most commonly used for dead space free draining and feeding of vessels, reactors and pipelines. They are particularly suited to highly viscous materials, or where rapid vessel drainage is important. They are widely used in the Pharmaceutical and Fine Chemicals, Petrochemical, Polymer, and Mineral Processing industries.

Drain Piston Valves

Piston Bottom Outlet Valves ready for testing, Photo:©SchuF


Key Characteristics of SchuF Ram Valves

  • All valves have full nominal bore

  • Available with 45°, 60°, or 90 degree outlet angle in the body

  • Modular design

  • Sealing to atmosphere always with adjustable loaded stuffing box

  • Valves have exchangeable seats

  • LeakTight © Sealing due to special SchuF process of manufacturing

  • A flushing connection is provided as standard

  • Available with either Radial or Positive seal

Ram Drain Valve Options

  • The Model 28 Valve is GMP and CIP compliant

  • A wafer type sampling valve can be inserted between valve body and vessel

  • Multiport valve variants are available

  • Manual, electric, pneumatic, and hydraulic actuation available


Drain Piston Valve

Flush Bottom Piston Valve, Photo:©SchuF


Ram Valve Model Numbers

Model Numbers 15, 26 and 28


Contact Us

For further information, pricing or a brochure, please contact us via e-mail: valves@schuf.com

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Video gallery
A video showing the operation of a recently-manufactured SchuF powder-sampling Valve is now available-please click the link below, which will take you to the Vimeo video-sharing website. The video will begin automatically. more