Purple Valves
PRPLZ171

Butterfly Type Check Valve

A butterfly (dual-plate) wafer check valve providing lightweight, non-slam backflow protection in a short face-to-face body.

Size1/2"-24"PressureANSI Class 150 to 300PortFull PortBodyWafer Dual Plate
Overview

The Butterfly Type Check Valve is a non-return valve engineered to prevent reverse flow and protect pumps, compressors and downstream equipment from backflow and water hammer. Built with a cast carbon steel (wcb), with stainless and special grades available and a split butterfly (dual plate) discs with spring assistance, the valve opens automatically under forward line pressure and closes under the weight of the closure member or spring assistance the instant flow reverses. Supplied with wafer, with lug option available and rated to ANSI Class 150 to 300, it is designed and tested to recognised international standards for dependable, low-maintenance service across oil and gas, petrochemical, power and water applications.

Technical Detail

Specifications

Size Range
1/2"-24"
Pressure Rating
ANSI Class 150 to 300
Temperature Range
-46°C to 232°C (-50°F to 450°F)
End Connections
Wafer, with lug option available
Body Material
Cast carbon steel (WCB), with stainless and special grades available
Ball / Disc / Wedge Material
Split butterfly (dual plate) discs with spring assistance
Seat Material
Hardfaced (Stellite) / metal seat, with soft seat options
Port Type
Full Port
Body Style
Wafer Dual Plate
Operation
Automatic (non-return)
Applications
Oil and gas, petrochemical, power generation, water treatment and general industrial pipelines
Design Standard
API 6D, API 594, BS 1868
Testing Standard
API 598
Face to Face Standard
ASME B16.10
At a Glance

Key Features

  • Split butterfly dual-plate disc
  • Spring-assisted non-slam closure
  • Short wafer face-to-face dimension
  • Lightweight, low-cost installation
  • Carbon steel body

Options

  • NACE compliant
  • Special alloys (CF8M, 2205, LCC, LCB)
  • Soft or metal seat
  • RTJ flange facing

Standards & Certifications

  • API 6D
  • API 598
  • ASME B16.10
  • NACE MR0175 (optional)
Contact

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