Water Supply Resilient Gate Valve

Water Supply Resilient Seated Gate Valve(soft-seal gate valve)is a core on-off control component specially engineered for municipal potable water,urban water supply networks,building plumbing and wastewater pipelines.Different from traditional metal-seated gate valves,it adopts an integrally rubber-vulcanized wedge gate as the sealing core,delivering bubble-tight zero leakage under rated pressure.The whole valve body is coated with fusion bonded epoxy to resist rust and meet drinking water sanitation standards,making it the most widely adopted shut-off valve in global water supply systems.

Working Principle

The valve controls water flow via vertical lifting and lowering of the rubber-coated wedge driven by the valve stem and handwheel:

Fully Open State:Rotate the handwheel counterclockwise to lift the wedge completely out of the flow passage,forming a full straight bore with minimal fluid resistance and no flow dead zone;pipeline pigging is supported.

Fully Closed State:Clockwise rotation pushes the wedge downwards.The EPDM/NBR elastic rubber on the wedge compresses tightly against the valve body’s sealing surface.Rubber elastic deformation compensates minor machining errors,sediment abrasion and assembly deviation,realizing bidirectional leak-free shutoff.

Stem multi-layer O-ring sealing prevents external water seepage during long-term underground buried use.

Core Structural&Material Advantages

1 Sealing Performance

Integral vulcanized EPDM rubber wedge,high adhesion without peeling off;food-grade rubber formula complies with drinking water contact requirements.

Elastic self-compensation sealing eliminates the metal-to-metal scratch leakage defect of hard-seal gate valves,zero leakage test passed per GB/T13927,AWWA C509,EN593 standards.

Smooth bottom cavity without sediment accumulation grooves,anti-blocking for raw water containing fine silt.

2 Body&Anti-Corrosion

Valve body&bonnet:High-strength ductile iron,25%lighter than cast iron gate valves of the same specification,convenient for installation and hoisting.

Internal&external fusion bonded epoxy coating,acid&alkali resistant,prevents pipeline water contamination,suitable for underground buried pipelines.

Valve stem:Stainless steel 2Cr13/304,anti-rust,anti-torsion,low friction operation.

3 Operation&Maintenance

Ultra-low operating torque,labor-saving manual handwheel operation;optional gear box,electric/pneumatic actuator for automatic control.

Short face-to-face dimension,saves pipeline installation space,adapts to narrow well chambers.

Replaceable rubber wedge without cutting pipelines,greatly reducing post-operation maintenance cost.

Key Technical Specifications

Nominal Diameter:DN40~DN1200(NPS1.5”~48”)

Pressure Class:PN10,PN16,Class150

Applicable Medium:Tap water,raw river water,reclaimed water,fire-fighting water,neutral wastewater

Medium Temperature:0℃~80℃

End Connection:Flange RF/FF,butt weld

Operation Mode:Handwheel,gear operator,electric actuator,pneumatic actuator

Compliance Standards:AWWA C509,EN 1092,GB/T 24924,ISO9001,CE,WRAS drinking water certification

Main Application Scenarios

Municipal waterworks,urban main water supply pipelines and secondary water supply pump stations

High-rise residential,commercial complex building indoor water supply&fire protection piping

Urban sewage,rainwater collection and wastewater treatment plants

Agricultural irrigation,park landscape water circulation systems

Industrial circulating cooling water,food factory clean water pipelines

Underground buried valve wells and outdoor exposed pipe networks

Competitive Merits Over Traditional Metal-Seated Gate Valves

Zero leakage:Elastic rubber sealing achieves bubble-tight shutoff,while metal-seal valves inevitably drip after long-term wear.

Anti-corrosion&sanitary:Epoxy coating+food-grade rubber,no secondary pollution to drinking water.

Long service life:Rubber wedge absorbs sediment impact,less abrasion,service life 2–3 times longer than hard-seal valves.

Cost-effective:Lightweight structure reduces transportation and installation expense;simple replacement of wearing parts cuts maintenance investment.

Wide adaptability:Bidirectional sealing,works equally well for forward and reverse water flow.