Purple Valves
PRPLZ247

Pressure Sealing Screwed Gate Valve

Compact forged steel gate valve combining a self-energising pressure-seal bonnet with screwed-end connections for high-pressure small-bore isolation.

SizeDN15 to DN50 (1/2" to 2")PressureANSI Class 800 to 2500PortFull BoreBodyPressure-seal bonnet, forged body
Overview

The ZQV Pressure-Sealing Screwed Gate Valve pairs a forged steel body with a self-energising pressure-seal bonnet, giving leak-tight performance on small-bore, high-pressure lines without the bulk of a bolted-bonnet design. Threaded or socket-weld ends suit instrument, drain, vent and auxiliary piping, while the full-bore wedge provides positive on/off isolation. Rising line pressure energises the bonnet seal, so sealing integrity actually improves as conditions become more severe, making the valve ideal for steam, hydraulic and high-pressure process branch lines.

Technical Detail

Specifications

Size Range
DN15 to DN50 (1/2" to 2")
Pressure Rating
ANSI Class 800 to 2500
Temperature Range
-29°C to 538°C (-20°F to 1000°F)
End Connections
Threaded NPT / Socket Weld (SW)
Body Material
ASTM A105 / A182 F11 / F22 forged steel
Ball / Disc / Wedge Material
Stellite-hardfaced solid wedge
Seat Material
13Cr / Stellite hardfaced
Stem Material
Forged 410 stainless steel
Port Type
Full Bore
Body Style
Pressure-seal bonnet, forged body
Operation
Handwheel
Applications
Small-bore steam, hydraulic, drain, vent and high-pressure instrument isolation.
Design Standard
API 600 / 602
Testing Standard
API 598
Face to Face Standard
ASME B16.10
At a Glance

Key Features

  • Forged body with self-energising pressure-seal bonnet
  • Threaded or socket-weld ends for branch and auxiliary lines
  • Full-bore wedge for unrestricted small-bore flow
  • Hardfaced trim for high-pressure, high-temperature duty

Options

  • Threaded or socket-weld ends
  • Various forged body grades
  • Solid or flexible wedge

Standards & Certifications

  • API 602
  • ASME B16.34
  • ASME B16.11
  • API 598
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