poster
HomeProductsGeneral-Purpose Valves (Gate Valves, Globe Valves, Check Valves)Gate
Gate

Gate

Working Principle: The valve stem drives the gate to move vertically up and down. When the gate is fully raised, the pipeline is straight and flow is unimpeded; when the gate falls, it presses against the valve seat, blocking the flow of media.

The media can flow in both directions without directional restrictions, and there are no flow direction requirements during installation.
Online Inquiry Contact Us

Product Description

Main Structural Classifications

 

1. By Gate Type

• Wedge Gate Valve: Single gate with wedge seal, excellent sealing performance, resistant to high temperature and pressure, most commonly used.

• Parallel Double Gate Valve: Suitable for low-pressure, normal-temperature water and steam media, wear-resistant and durable.

2. By Stem Structure

• Rising Stem Gate Valve: Exposed stem for easy identification of opening and closing status, corrosion-resistant and long service life.

• Non-exposed Stem Gate Valve: Stem not exposed, small footprint, mostly used for water supply and drainage, and underground pipelines.

3. Sealing Type

• Hard Seal: Metal seal, resistant to high temperature and pressure, wear-resistant, suitable for steam, oil, and high-temperature conditions.

• Soft Seal: Rubber/PTFE seal, zero leakage, corrosion-resistant, mostly used for sewage and tap water.

 

Core Advantages

 

1. Minimal flow resistance, straight internal passage without bends, low energy consumption for media transport;

2. Bidirectional sealing, usable in both forward and reverse flow directions, easy installation;

3. No media erosion of the sealing surface when fully open, long service life of the sealing surface;

4. Simple structure, low failure rate, easy maintenance, and wide range of applicable diameters.

 

Common Materials and Parameters

 

• Valve Body: Cast iron, ductile iron, WCB carbon steel, 304/316L stainless steel

• Pressure: PN10, PN16, PN25, PN40; Class 150~300

• Temperature: Soft seal ≤120℃, hard seal up to 425℃+

• Connection Methods: Flange, threaded, welded, wafer

 

Applicable Operating Conditions
Suitable for pipeline switching of pure, particulate-free media:

• Municipal water supply and drainage, fire protection, tap water projects

• Power plant steam, heating networks, oil and gas transmission

• Petrochemical, HVAC, compressed air, clean water, oil pipelines

Online Inquiry

Submit

Related Products

Gate

Gate

Working Principle: The valve stem drives the gate to move vertically up and down. When the gate is fully raised, the pipeline is straight and flow is unimpeded; when the gate falls, it presses against the valve seat, blocking the flow of media.

The media can flow in both directions without directional restrictions, and there are no flow direction requirements during installation.

Fluorine-Lined Gate Valve

Fluorine-Lined Gate Valve

Working Principle:
The valve stem drives the gate to rise and fall vertically, controlling the flow of the pipeline; the medium only contacts the fluoroplastic lining layer and does not directly contact the metal valve body, completely isolating it from acid and alkali corrosion; it allows bidirectional flow without flow direction restriction, and is only used for switching off, not for throttling or regulating.

Gate Valve

Gate Valve

Working Principle: The medium flows in from below the valve seat, passes through the throttling gap between the valve disc and the valve seat, and flows out from the outlet. The valve disc stroke is controlled by the rise and fall of the valve stem, changing the flow cross-sectional area to achieve both shut-off and throttling. When closed, the axial pressure of the valve stem presses against the sealing surface to achieve a tight seal.

Structural Features:
1. Unidirectional Flow: Medium enters from a lower position and exits from a higher position; cannot be installed in reverse, requiring directional control during installation.

2. Good Sealing Performance: Plane/conical surface seal, tight closure, low leakage.

3. Excellent Throttling Performance: Controllable stroke, suitable for small-amplitude pressure and flow adjustment.

4. Relatively High Flow Resistance: S-shaped flow path in the pipeline, resistance coefficient higher than gate valves and ball valves.

5. Short opening and closing stroke, simple structure, convenient maintenance and replacement of parts.

Check Valve

Check Valve

Working Principle: When the medium flows in the forward direction, the fluid pressure opens the valve disc/valve core, allowing the valve to open. When the medium flows in the reverse direction or the pressure reverses, the valve automatically closes and seals itself due to its own weight and the pressure of the reverse medium, completely blocking backflow without manual or electrical control.

Main Classifications and Structures:
1. Swing Check Valve: The valve disc swings around a pin. Commonly used in large-diameter applications, it has low flow resistance and smooth passage, suitable for water, steam, and oil.

2. Lift Check Valve: The valve disc moves vertically up and down along the valve stem, providing better sealing performance. Often used in small-diameter, high-pressure applications.

3. Wafer Check Valve: Ultra-thin structure, small size, low cost. It is clamped between two flanges for easy installation.

4. Butterfly Double-Disc Check Valve: Double-disc structure, sensitive opening and closing, good buffering, suitable for large-diameter water supply and drainage, and industrial pipelines.

5. Silent Check Valve: With a buffer structure, it reduces water hammer and noise. Commonly used in buildings and pump rooms.

+86 19858780995

+86 19858780995

+86 19858780995

+86 19858780995

19858780995@163.com