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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.
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Product Description

Main Classifications

 

1. By Structure

• Straight-through gate valve: Most commonly used, for straight-line pipeline installation

• Angle gate valve: For 90° turn pipelines, saving bends

• Direct-flow gate valve: Lower flow resistance, suitable for high flow rates

2. By Connection Method: Flange, Threaded, Welded

3. By Actuation Method: Manual, Pneumatic, Electric, Hydraulic

4. Sealing Type: Soft seal (PTFE), Hard seal (Alloy, Stainless Steel)

 

Core Advantages

 

• Reliable sealing, highly adaptable to high temperature and high pressure conditions;

• Excellent throttling and pressure reduction functions, suitable for pipelines requiring fine-tuning;

• Slow opening and closing, preventing water hammer impact;

• Simple structure, low failure rate, and low maintenance costs.

 

Common Materials and Parameters

 

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

• Seal: PTFE, hard alloy, wear-resistant weld overlay

• Pressure: PN16~PN100, Class 150~600

• Temperature: Soft seal: -20℃～180℃ Hard seal: -30℃～425℃

 

Applicable Industries and Operating Conditions


Widely used for water, steam, oil, gas, and weakly corrosive chemical media:

 

• Heating and power plant steam pipelines;

• Chemical, petrochemical, and oil refining pipelines;

• Water supply and drainage, HVAC, and fire protection systems;

• Compressed air, heat transfer oil, and hot water pipelines.

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Related Products

Fluorine-Lined Gate Valve

Fluorine-Lined Gate Valve

Basic Definition: A fluoropolymer-lined gate valve is a forced-seal shut-off valve in which the inner surfaces of the valve body, cover, disc, and seat—all in contact with the medium—are entirely lined with a layer of fluoroplastic (PTFE/FEP/PFA/TFM, etc.). Its core structure combines metal load-bearing with fluoroplastic corrosion protection.

Core Structure:
• Valve Body/Cover: Carbon steel/stainless steel shell, lined with fluoroplastic
• Valve Disc/Seat: Fully fluoropolymer-lined, flat/conical seal, axially moving
• Valve Stem: Rising stem or rising/rotating stem, with packing seal
• Actuation: Manual, worm gear, pneumatic, electric

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 Check Valve

Fluorine-Lined Check Valve

Main Performance Parameters

• Nominal Pressure: PN6～PN25

• Nominal Diameter: DN15～DN300

• Operating Temperature: -50℃～+150℃ (depending on lining material; PFA and TFM modified fluoropolymer linings can withstand temperatures up to 260℃)

• Sealing Class: Class VI, extremely leak-proof

• Applicable Media: Strong acids, strong alkalis, strong oxidizers, organic solvents, hydrofluoric acid, aqua regia, and other highly corrosive media

Structural Forms

1. Lift Type (H41F46): Compact structure, excellent sealing performance, moderate flow resistance, suitable for horizontal pipelines.

2. Swing Type (H44F46): Single-plate structure, large diameter, low flow resistance, suitable for high-flow, large-diameter pipelines.

3. Vertical Type (H42F46): Adapted for vertically upward-installed pipelines, unidirectional backflow prevention, dedicated to vertical operating conditions.

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.

+86 19858780995

+86 19858780995

+86 19858780995

+86 19858780995

19858780995@163.com