Gate Valve
Gate valves isolate flow with a linear wedge or knife disc in flanged, wafer or threaded bodies from DN20 to DN2400. Ductile iron, WCB, SS304/316 or carbon steel with EPDM/NBR/PTFE or metal seats give bubble-tight shutoff, full bore, low pressure drop and corrosion resistance. Rising or non-rising stem, resilient/wedge/knife type, handwheel, gear, pneumatic or electric driven. For water, wastewater, oil, slurry, HVAC, power under DIN/ANSI/JIS/EN.
Rising Stem or Non-Rising Stem
A rising stem moves upward as the valve opens, giving operators a clear visual position indication. It suits surface pipework and valve stations, but enough vertical clearance must be reserved above the valve. A non-rising stem turns in place and needs little headroom, making it practical for buried lines, chambers, pits and low ceilings.
Gate Valve Types and Materials
Resilient-seated wedge gate valves provide tight shutoff in water and wastewater systems. Metal-seated gate valves suit higher temperatures, steam, oil and abrasive service. Knife gate valves use a thin blade to isolate slurry, sludge and fibrous media. Ductile iron is widely used for water service, WCB for higher strength, and SS304 or SS316 for corrosive environments.
Handwheel, gearbox, chain wheel, electric, pneumatic and hydraulic operation are available. Gate valves should be used fully open or fully closed, not for continuous throttling.
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FAQ
1
Which stem type should I choose?
Choose rising stem for visible position indication and non-rising stem where installation height is limited.
2
What is the difference between a gate valve and a knife gate valve?
A standard gate valve suits clean liquids; a knife gate valve cuts through solids, slurry and fibres.
3
Can a gate valve regulate flow?
No. Partial opening can cause vibration and seat damage
4
What information is needed for a quotation?
Please provide size, pressure class, medium, temperature, connection, stem type, seat and actuation.
Veyron Valve (Tianjin) Co., Ltd. We offer a diverse product range, specializing in butterfly valves, gate valves, and check valves. Our butterfly valve comes in wafer, lug, and flanged types, plus we supply chain wheels, joints, stainers, and more.
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