Resilient Wedge Gate Valve: Zero-Leakage Performance for Water & Waste Systems

Essential Specs:

Design Standard: AWWA C509 / C515, DIN 3352, BS 5163
Pressure Class: PN10, PN16, PN25, Class 125/150
Sealing: Zero-Leakage Resilient Sealing (EPDM/NBR)
Body Coating: Fusion Bonded Epoxy (FBE) – Drinking Water Safe

Engineered for Pure Water and Zero-Leakage Reliability

Traditional metal-seated gate valves have a major flaw in water systems: the bottom “groove” or “pit” required for the wedge to seat often collects sand, stones, and sediment, leading to seal failure.

Our Resilient Wedge Gate Valve solves this with a Flat-Bottom Design. The valve body is as smooth as a pipe, and the seal is achieved by the compression of a high-grade rubber-encapsulated wedge against the smooth valve floor.

Core Advantages:

100% Bubble-Tight Sealing: The high-quality EPDM encapsulation ensures zero leakage even at low pressure.
Self-Cleaning Flat Bottom: No groove at the bottom means no sediment buildup, ensuring a clear flow path and long service life.
Corrosion Resistance: Fully coated with Fusion Bonded Epoxy (FBE) both internally and externally, preventing rust and ensuring drinking water safety.
Lightweight & High Strength: Constructed from high-grade Ductile Iron, offering superior strength-to-weight ratio compared to old cast iron valves.

Key Design Features

EPDM Fully Encapsulated Wedge: The ductile iron wedge is fully bonded with vulcanized EPDM rubber, providing excellent memory and resistance to chemical attack.
Replaceable O-Rings: The stem sealing system uses multiple O-rings that can be replaced under full pressure (in the fully open position), minimizing maintenance downtime.
Drinking Water Certified: All internal materials and coatings are non-toxic and compliant with WRAS, NSF, or ACS standards.
Flexible Operation: Available with a handwheel, square operating nut (for underground T-key use), or electric/pneumatic actuators.

Technical Specifications

Feature	Standard Configuration	Optional Upgrades
Size Range	2″ – 24″ (DN50 – DN600)	Up to DN1200
Body Material	Ductile Iron (GJS 450-10 / A536)	Cast Steel (Special Order)
Wedge Material	Ductile Iron + EPDM / NBR	Viton (for high-temp/oil)
Stem Material	Stainless Steel 410 / 420	SS304 / SS316 / Monel
End Connection	Flanged, Threaded, Mechanical Joint	Grooved (for Fire Protection)

Primary Industrial & Municipal Applications

Potable Water Systems: Safe, leak-free distribution for drinking water.
Wastewater & Sewage: Resilient sealing prevents solids from damaging the seat.
Fire Protection (UL/FM): Essential for fire mains and sprinkler systems (often with Rising Stem/OS&Y).
Irrigation & HVAC: Efficient isolation for agricultural and commercial cooling systems.

Compliant with: AWWA C515, DIN EN 1171, API 600 (modified), and ISO 7259.

Resilient Wedge Gate Valve: Frequently Asked Questions

Q: Can this valve be used for hot steam?
A: No. Resilient wedge valves use rubber seals (EPDM/NBR) typically rated up to 70°C-120°C. For steam, please refer to our Metal Seated Gate Valve section.
Q: What is the benefit of Ductile Iron over Cast Iron?
A: Ductile Iron is much more resilient to “water hammer” and ground movement, making it the only choice for modern underground infrastructure.