Purple Valves
PRPLZ163

Wafer Concentric Butterfly Valve

Concentric resilient-seated wafer butterfly valve delivering reliable quarter-turn bubble-tight shut-off.

SizeDN50 to DN600 (2" to 24")PressurePN10 / PN16 / ANSI Class 150PortStandard BoreBodyWafer, concentric
Overview

The ZQV Wafer Concentric Butterfly Valve places the stem, disc and seat on a single common centreline, so the rubber seat is in continuous contact with the disc edge throughout the full quarter-turn travel for dependable bidirectional, bubble-tight sealing. The slim wafer body fits between standard pipe flanges to save space and weight, and the elastomer liner fully isolates the body from the medium for excellent corrosion protection. Fast 90-degree operation makes it well suited to on/off and throttling control on water, slurry, HVAC and general industrial lines.

Technical Detail

Specifications

Size Range
DN50 to DN600 (2" to 24")
Pressure Rating
PN10 / PN16 / ANSI Class 150
Temperature Range
-29°C to 120°C (-20°F to 250°F)
End Connections
Wafer (clamped between flanges)
Body Material
Ductile iron / WCB cast steel
Ball / Disc / Wedge Material
Ductile iron / stainless / nylon-coated disc
Seat Material
EPDM / NBR resilient liner
Stem Material
420 / 410 stainless steel
Port Type
Standard Bore
Body Style
Wafer, concentric
Operation
Lever
Applications
Water, slurry, HVAC and general industrial isolation and throttling.
Design Standard
API 609 / EN 593
Testing Standard
API 598
Face to Face Standard
ASME B16.10
At a Glance

Key Features

  • Concentric design for full disc-to-seat contact and bidirectional sealing
  • Elastomer liner fully isolates body from the medium
  • Slim wafer body saves space and weight
  • Fast quarter-turn operation

Options

  • Lever, gear, electric or pneumatic actuation
  • EPDM or NBR seat
  • Various disc coatings

Standards & Certifications

  • API 609
  • EN 593
  • ASME B16.34
  • API 598
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