True Union Ball Valves – Type 21

Chemline Type 21 True Union Ball Valve is a full port, blocking valve pressure rated at 16 bar (230 psi). Double stem o-rings provide for a high degree of safety on hazardous fluid applications. All sizes have an ISO standard actuator mounting platform for mounting of pneumatic or electric actuators.

Polyvinyl Chloride
Chlorinated Polyvinyl Chloride
Pigmented Polypropylene
Polyvinylidene Fluoride
  • Size:
    3/8" to 4"
  • Ends:
    Socket, Threaded, Butt, Flanged, ChemFlare™
  • Body:
    PVC, CPVC, PP, PVDF
  • Seats:
    PTFE
  • Seals:
    EPDM, FKM (VitonĀ®)

Features & Benefits

  • Full Port
    High capacity and low pressure drops.
  • Fully Blocking
    Downstream union nut may be safely disassembled for piping maintenance while valve is closed off under full system pressure.
  • Pressure rated to 230 psi
    Provides a high factor of safety.
  • Integral Actuator Mounting Platform
    Actuation is easy. Electric or pneumatic actuators may be mounted in the field.
  • Built-In Spanner Wrench
    Top of the handle is designed to be used as a tool for accessing internal parts.
Valve Specification Guide

Valve Specification Guide

Engineering specifications are crucial as they provide precision, clarity, quality assurance and compliance in your projects. Download to save you time and assure accuracy in your specifications.

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Valve Specification Guide

Chemical Resistance Guide

Corrosion resistance is an important factor in selecting the right material of construction for valves, pipe, tubing, fittings and more. Designed to easily navigate, this guide can be downloaded for easy reference.

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Materials of Construction Cover Photo

Materials of Construction

Understanding materials of construction is essential to the accurate selection of valves, pipe, tubing, fittings and more. Designed to easily navigate, this guide can be downloaded for easy reference.

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