Purple Valves
PRPLZ189

Forged Piston Check Valve

A forged steel piston check valve that uses a guided piston disc for tight, automatic shut-off against reverse flow.

Size1/2" to 4"PressureClass 800 to 2500PortFull portBodyPiston (lift) check
Overview

This forged steel piston check valve uses a closely guided piston-style disc that travels straight up and down against its seat, giving precise, quiet and tight non-return sealing. Forward flow lifts the piston clear of the seat, and on flow reversal it drops back into the bore to seal firmly, with optional dashpot damping to soften closure. Forged construction and compact threaded or socket-weld ends make it a strong choice for high-pressure steam, oil and process piping.

Technical Detail

Specifications

Size Range
1/2" to 4"
Pressure Rating
Class 800 to 2500
Temperature Range
-46°C to 232°C (-50°F to 450°F)
End Connections
Threaded (BSPT/NPT), Socket Weld, Flanged
Body Material
Forged steel (A105, LF2, F11, F22, F304/316 and special grades)
Ball / Disc / Wedge Material
Guided piston disc
Seat Material
Metal / API trims (Trim 1, 5, 8, 12, 16)
Port Type
Full port
Body Style
Piston (lift) check
Operation
Automatic (non-return)
Applications
High-pressure steam, oil, gas and process piping
Design Standard
API 602, BS 1868
Testing Standard
API 598
Face to Face Standard
ASME B16.10
At a Glance

Key Features

  • Guided piston disc for tight, quiet sealing
  • Forged steel body for high pressure
  • Threaded, socket-weld or flanged ends
  • Automatic non-return action
  • Class 800 to 2500 capability

Options

  • NACE compliant trim
  • Special materials on request
  • Soft or metal seating

Standards & Certifications

  • API 598
  • NACE compliant (optional)
  • API 602
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