Z45X Rubber Resilient Seated Gate Valve
Z45X Rubber Resilient Seated Gate Valve
Z45X Rubber Resilient Seated Gate Valve
Z45X Rubber Resilient Seated Gate Valve
  1. Z45X Rubber Resilient Seated Gate Valve
  2. Z45X Rubber Resilient Seated Gate Valve
  3. Z45X Rubber Resilient Seated Gate Valve
  4. Z45X Rubber Resilient Seated Gate Valve

Z45X Rubber Resilient Seated Gate Valve

• Flanged resilient-seated gate valve with full NBR rubber coating for zero-leakage water sealing
• Dual pressure ratings: PN10 and PN16, DN50–DN600 size range
• HT200 ductile cast iron body with full internal/external epoxy coating
• NBR rubber encapsulated disc and seat for excellent wear and corrosion resistance
• Working temperature up to 80°C for municipal water, HVAC, and irrigation systems

Gaoshan Valve — Z45X Rubber Gate Valve

Model: Z45X  |  Pressure: PN10 ~ PN16  |  Connection: Flanged  |  Medium: Water

Pressure Class
PN10 – PN16
Size Range
DN50 – DN600
Temperature
≤80°C
Body Material
Ductile Cast Iron (HT200)
Applicable Medium
Water
Non-Corrosive Fluids
Core Strengths
Fully Coated NBR Rubber Seat
Entire body interior coated with NBR rubber lining provides bubble-tight zero-leakage sealing against waterborne sediment, sand, and particulate matter.
Epoxy Coating Corrosion Protection
Full epoxy coating on both internal and external surfaces delivers superior corrosion resistance for water service, extending service life in aggressive water environments.
Non-Rising Stem Design
Compact non-rising stem (NRS) construction minimizes installation height — ideal for underground vaults, valve chambers, and space-constrained applications.
Dual Pressure Rating Options
Available in both PN10 and PN16 pressure classes across DN50–DN600, covering municipal mains through industrial water distribution networks.
Product Overview

The Z45X is a flanged resilient-seated gate valve specifically engineered for water supply, distribution, and transmission systems. Featuring an innovative fully-coated NBR rubber seat design where both the body cavity and disc are lined with nitrile-butadiene rubber (NBR), this valve delivers exceptional sealing performance even in water containing sand, silt, and suspended solids — conditions where traditional metal-seated valves would fail.

Constructed from ductile cast iron (HT200) body and bonnet with full internal and external epoxy coating, 2Cr13 stainless steel stem, and NBR rubber gaskets, the Z45X offers outstanding corrosion resistance for long-term buried or submerged service. Available in sizes DN50 through DN600 at PN10 and PN16 pressure ratings with working temperatures up to 80°C, this series meets GB/T 12232 design standards and is widely deployed in municipal waterworks, irrigation networks, fire protection systems, and HVAC water circuits worldwide.

Performance Specifications
ModelNominal Pressure PN (MPa)Shell Test Pressure (MPa)Seal Test Pressure (MPa)Working Temperature (°C)Applicable Medium
Z45X-101.01.51.1≤80Water
Z45X-161.62.41.8
Main Component Materials
NOPart NameMaterial
1Valve Body, BonnetDuctile Cast Iron (HT200), Epoxy Coated
2Seal Ring (Seat)Full Epoxy Coat (Entire Cavity Lining)
3Disc (Gate/Wedge)HT200 Cast Iron + NBR Rubber Encapsulation
4Valve Stem2Cr13 Stainless Steel
5Gasket / PadNBR Rubber (Nitrile Butadiene Rubber)
Main Dimensions — Manual Flanged PN10/PN16 (mm)
Nominal Diameter DN (mm)L (Face-to-Face)H (Total Height)D0 (Handwheel Dia.)
50178270180
65190300180
80203320240
100229350240
125254400280
150267455280
200292560320
250330650360
300356770400
350381870500
4004061010640
4504321080640
5004571180640
6005081345640

Dimensions apply to both PN10 and PN16 pressure classes. Dimensions are for reference only. Contact us for certified dimensional drawings and custom sizes.

Structure Drawing

Z45X Rubber Resilient Seated Gate Valve — 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
ISO 5208
JB/T 308
Installation & Maintenance Notes
  • Install vertically or horizontally as required by pipeline orientation. Ensure adequate clearance for handwheel operation and maintenance access.
  • Flush the pipeline thoroughly before installation to prevent debris from damaging the NBR rubber-coated seal surfaces during initial commissioning.
  • Do not use the handwheel as a lifting point — excessive force can damage the bonnet assembly, stem threads, and NBR rubber seals.
  • For valves installed but idle over extended periods, operate the handwheel periodically (monthly recommended) to prevent the NBR rubber seat from bonding to the disc surface.
  • Inspect NBR gaskets during routine maintenance. Replace if signs of hardening, cracking, or permanent compression set are observed.
Typical Applications
  • Municipal Water Supply & Distribution Networks
  • Fire Protection Systems (Hydrant Lines, Sprinkler Mains)
  • Agricultural Irrigation Systems
  • HVAC Chilled Water & Hot Water Circuits
  • Process Water Treatment Plants & Cooling Towers
  • General Industrial Fluid Isolation & Flow Control
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