Tel: 0086 18526404098 Email: zxn@zxnvalve.com
Language:

Gate Valves

Resilient seated and metal seated gate valves with rising or non-rising stem, ideal for water supply and fire protection systems.

Home › Products › Gate Valves
Gate Valve - Resilient Seated Type

Gate Valves

Resilient Seated / Metal Seated | DN50 - DN600

ZNX gate valves are designed for on/off service with minimal pressure drop. The gate moves up and down to fully open or close the flow path, providing an unobstructed straight-through passage when fully open. This makes them ideal for pipelines where full flow capacity and minimal turbulence are required.

Our resilient seated gate valves with EPDM encapsulated wedge are the preferred choice for drinking water systems, while metal seated versions are used in higher temperature steam, oil, and gas applications.

Technical Specifications

Size RangeDN50 - DN600 (2" - 24")
Pressure RatingPN10, PN16, PN25, ANSI 125/150
Body MaterialCast Iron, Ductile Iron, WCB, SS304, SS316
Wedge MaterialDuctile Iron + EPDM encapsulated, SS, Bronze
Seat MaterialEPDM, NBR, Bronze, SS (metal seated)
Stem TypeNon-Rising Stem (NRS), Rising Stem (OS&Y)
Stem MaterialSS416, SS304, SS316
ConnectionFlanged, Threaded, Socket Weld, BW
Working Temp.-10°C to +120°C (resilient), up to +425°C (metal seat)
StandardAPI 600, API 602, API 6D, EN 1171, EN 1984, AWWA C509/C515
TestingAPI 598, EN 12266, AWWA C509

Key Features

  • Full bore straight-through design for minimum pressure loss
  • EPDM encapsulated wedge for bubble-tight shutoff (resilient seated)
  • Ductile iron body with epoxy coating for corrosion resistance
  • Replaceable O-ring stem seal for leak-free operation
  • Backseat design allows stem seal replacement under pressure
  • Fusion-bonded epoxy coating inside and outside (NSF61 certified available)
  • Manual handwheel, gear operator, or electric actuator options

Applications

  • Municipal water supply and distribution networks
  • Fire protection and sprinkler system isolation
  • Sewage and wastewater treatment plants
  • Industrial plant isolation and main line service
  • Power plant cooling water and auxiliary systems
  • Steam, oil, and gas pipelines (metal seated type)
  • Building services and HVAC main shutoff
Request a Quote Download Spec Sheet

Product Series

Two stem configurations covering buried / compact installations and above-ground isolation duty.

Series 1

Non Rising Stem Gate Valve

DN50 - DN600 | PN10 / PN16 / ANSI 125-150 | NRS

In the non-rising stem (NRS) design, the stem threads are inside the bonnet in contact with the media. The handwheel rotates in place while the wedge travels up and down the stem — the stem itself never rises. This gives the most compact overall height, the standard choice for buried pipelines and manhole installations.

Technical Specifications

Size RangeDN50 - DN600 (2" - 24")
Pressure RatingPN10, PN16, ANSI 125/150
Body MaterialDuctile Iron GJS500-7, Cast Iron GJL250
Wedge MaterialDuctile iron, fully EPDM encapsulated
StemNon-rising, SS416 / SS304, bronze nut inside
ConnectionFlanged (DIN / ANSI / BS / JIS)
CoatingFusion epoxy 250μm, NSF/61 & WRAS available
Working Temp.-10°C to +80°C (drinking water grade EPDM)
StandardAWWA C509 / C515, EN 1074-1/2, BS 5163
OperationHandwheel, bevel gear (DN≥300), extension spindle for buried service

Key Features

  • Lowest overall height — fits shallow valve boxes and manholes
  • Standard for buried water mains with extension spindle
  • EPDM-encapsulated wedge for bubble-tight sealing
  • Triple O-ring stem seal, replaceable under pressure
  • Full-bore unobstructed waterway, C-factor friendly
Series 2

Rising Stem Gate Valve

DN50 - DN600 | PN16 / PN25 / ANSI 150 | OS&Y

In the rising stem — outside screw and yoke (OS&Y) — design, the stem threads sit outside the bonnet, away from the media. When opening, the stem and handwheel visibly rise, giving an instant visual indication of valve position. It is preferred for above-ground plants, fire protection and pump rooms where status must be checked at a glance.

Technical Specifications

Size RangeDN50 - DN600 (2" - 24")
Pressure RatingPN16, PN25, ANSI 150
Body MaterialDuctile Iron, WCB Carbon Steel, SS304/316
Wedge MaterialDuctile iron + EPDM (resilient) or solid SS / bronze (metal seated)
StemRising / OS&Y, ACME thread, SS416 / SS304
ConnectionFlanged, threaded (NPT/BSPT) for small sizes
Working Temp.-10°C to +120°C (resilient), up to +425°C (metal seated, WCB)
StandardAPI 600, API 602, EN 1171, EN 1984, UL/FM listed for fire service
TestingAPI 598, EN 12266 — 100% shell & seat tested

Key Features

  • Visible open/closed position — stem height tells status instantly
  • Threads outside the media — longer life on dirty / abrasive water
  • Backseat design allows seal replacement under pressure
  • UL Listed / FM Approved versions for fire protection
  • Metal seated WCB option for steam, oil and gas service

Download Our Product Catalog

Get the complete ZNX product brochure with detailed specifications, dimensions, materials and applications. Available in PDF format.

📄 Download Catalog (PDF)