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Neles™ PZ Series Capping Valve

About Neles™ PZ Series Capping Valve

Neles™ PZ series capping valve offers a solution for automatic opening and closing of batch digester for chip fill. Capping valve increases digester chip fill process efficiency, safety, and reliability.

Technical Specifications

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Description

Neles™ PZ series capping valve offers a solution for automatic opening and closing of batch digester for chip fill. Capping valve increases digester chip fill process efficiency, safety, and reliability. A preloading device outside the body assists the ball to the metal seat with the desire pressure for thight and reliable sealing. The single piece Stemball™ has a rear stem and a support to prevent sideways movement of the ball when closing against chips.


Specifications
Design
Full bore ball valve
Size range
Size range: DN 500, 600, and 750 / NPS 20”, 24”, and 30”, bottom flange modified in accordance to digester top flange
Pressure classes
PN 16 & ASME 150
Temperature range
up to +200 °C / +390 °F
Features
  • Metal to metal seating offers long lasting tightness and low maintenance cost
  • PZ capping offers compact way of incorporating safety interlocks by two pressure sensors mounted on valve body to prevent unintentional valve operation when digester is pressurized
  • Valve lower flange is custom-made to match the digester top flange allowing easy installation to existing digester vessel
  • Applications:

    • Pulping
    • Chip fill process
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