Z45X Resilient Seated Gate Valve

  • Flat Bottom Design: Prevents debris accumulation, ensuring more reliable sealing performance.
  • Fully Rubber-Coated Disc: The entire gate disc is encapsulated in NBR rubber for zero leakage and corrosion resistance.
  • Low Operating Torque: Triple O-ring stem seal reduces friction for smooth, light operation with no leakage.
  • Compact & Lightweight: Small size and low weight for easy installation and maintenance.
  • Harsh Environment Compatibility: Corrosion-resistant internal parts suitable for sewage and challenging working conditions.

Model Series: Z45X-10 / Z45X-16  |  Pressure Class: PN10 / PN16  |  Size Range: DN50 ~ DN1000

Pressure Class
PN10 / PN16
Size Range
DN50 – DN1000
Temperature
≤80°C
Body Material
Ductile Iron / Cast Iron
Applicable Medium
Water
Oil
Non-Corrosive Fluids
Core Strengths
Resilient Seat Zero Leakage
EPDM/NBR rubber-coated gate provides bidirectional bubble-tight shutoff with no leakage in either flow direction.
Full Bore Corrosion-Free Design
Straight-through passage eliminates turbulence and pressure drop. Rubber coating prevents internal corrosion.
Low Operating Torque
O-ring seal and bronze thrust bearing reduce friction by over 50% compared to conventional gate valves.
Maintenance-Friendly Construction
Non-rising stem with O-ring stem seal allows easy in-line inspection and seal replacement without removal.
Product Overview

The Z45X resilient seated gate valve is a widely used industrial valve designed primarily for water supply, drainage, and oil pipeline systems. It features a unique elastic rubber-coated gate structure that achieves reliable sealing through the full encapsulation of the gate body with EPDM or NBR rubber material.

Unlike traditional metal-seated gate valves, the resilient seat design compensates for minor surface imperfections and thermal expansion, ensuring consistent zero-leakage performance throughout the service life. Available in PN10 and PN16 pressure classes with sizes up to DN1000, it is the preferred choice for municipal waterworks, fire protection systems, and industrial fluid control applications.

Performance Specifications
Model Nominal Pressure PN (MPa) Shell Test Pressure (MPa) Seal Test Pressure (MPa) Working Temperature (°C) Applicable Medium
Z45X-10 1.0 1.5 1.1 ≤80 Water, Oil
Z45X-16 1.6 2.4 1.76 ≤80
Main Component Materials
NO Part Name Material
1 Valve Body Gray Cast Iron, Ductile Iron, Cast Steel
2 Gate (Wedge) Ductile Iron Coated with EPDM or NBR Rubber
3 Internal Hex Socket Bolt Carbon Steel (Carburized / Hardened)
4 Seat Ring / Seal Ring Nitrile Rubber (NBR), EPDM
5 Bonnet (Cover) Gray Cast Iron, Ductile Iron, Cast Steel
6 Valve Stem Stainless Steel
7 O-Ring Stem Seal Nitrile Rubber (NBR), EPDM
8 Thrust Bearing Tin Bronze (Bearing Bronze)
9 Gland Bolts / Studs Stainless Steel
10 Gland (Packing Gland) Ductile Iron, Cast Steel
11 Dust Cover Nitrile Rubber (NBR)
12 Handwheel (Actuation Cap) Cast Iron
Main Dimensions — Manual Flanged (mm)
DN (mm) L (Face-to-Face) D₀ (Handwheel Dia.) H (Total Height)
50 178 175 240
65 190 175 270
80 203 200 310
100 229 200 330
125 254 240 380
150 267 270 460
200 292 305 530
250 330 360 680
300 356 360 720
350 381 360 830
400 406 450 950
450 432 450 1020
500 457 660 1250
600 508 660 1305
700 610 750 1550
800 660 850 1750
900 711 1950
1000 811 2170

Dimensions are for reference only. Contact us for certified dimensional drawings and custom sizes.

Structure Drawing

 

Structure drawing for reference only. Contact us for certified dimensional drawings.

Design & Manufacturing Standards
GB/T 12232
GB/T 13927
API 598
ANSI B16.5
GB/T 12234
ISO 5208
CJ/T 216
BS 5150
Installation & Maintenance Notes
  • Install vertically or horizontally as required. For underground applications, specify a buried extension spindle when ordering.
  • Ensure pipeline cleanliness before installation — debris can damage the rubber-coated seat during first operation.
  • Do not use the handwheel as a lifting point to avoid damaging the bonnet assembly and stem mechanism.
  • For valves installed but idle for extended periods, operate the handwheel periodically to prevent rubber seat sticking.
  • Inspect O-ring stem seals annually and replace if signs of aging or cracking are visible.
Typical Applications
  • Municipal Water Supply & Distribution Networks
  • Fire Protection Systems (Hydrant Lines, Sprinkler Mains)
  • Sewage Treatment Plants & Drainage Systems
  • Industrial Water Cooling Circuits
  • Oil Terminal Storage & Transfer Pipelines
  • Building Services (HVAC Chilled Water, Potable Water)
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