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Fixed Ball Valve

Fixed Ball Valve

Structural Features

• The valve core is a fixed shaft structure, positioned by bearings/sleeves at the top and bottom.

• The valve core itself does not move back and forth; sealing is achieved by the valve seat pressing against the valve core.

• It is a bidirectional sealing structure.

• Common connections: flange connection, welded connection.
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Product Description

Working Principle

1. Medium pressure prevents the valve core from pushing to one side, keeping it always centered.

2. Rotating the valve core 90° achieves full open/full close.

3. The valve seat has a built-in pre-tension spring, ensuring a seal even at low pressure.

4. More reliable sealing under high pressure, less prone to jamming and wear.

 

Main Advantages

1. Suitable for high pressure and large diameters. Pressures can reach Class 600, 900, 1500, and even higher. More stable than floating ball valves at large diameters.

2. Low torque and easy operation. The valve core is not pressurized, making manual/pneumatic/electric operation easier.

3. Long seal life. The valve core does not rub against or compress the valve seat, resulting in even wear, suitable for frequent switching.

4. Less prone to jamming. More durable than floating ball valves in media containing particles and impurities.

5. Optional bidirectional sealing. Achieves true bidirectional zero leakage, meeting the requirements of complex pipelines.

 

Applicable Operating Conditions

• Oil and gas, chemical, long-distance pipelines

• High temperature, high pressure, flammable and explosive media

• Large-diameter pipeline networks, circulation systems

• Media containing small amounts of particles, viscous media

 

Common Material Combinations

• Valve body: WCB/SS304/SS316/33316L/special alloy materials

• Valve core/seat: Hardened stainless steel/hard alloy overlay

• Seal: PTFE, filled PTFE, reinforced PTFE

• Applicable temperature: Approximately -29℃～200℃

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Related Products

Pneumatic Floating Ball Valve

Pneumatic Floating Ball Valve

Structural Features

• The ball has no lower support shaft; it is held only by the valve seats at both ends, allowing for slight floating under medium pressure.

• The valve stem is top-mounted, connecting to the ball, and is only responsible for rotation, not bearing axial pressure.

• Double-sided sealing: When closed, the ball is pushed towards the outlet valve seat by the medium pressure, forming a self-tightening seal.

• Simple structure: The valve body, ball, valve seat, valve stem, and stuffing box have few components, making maintenance convenient.

Working Principle

• Opening: Rotate the valve stem 90°, aligning the ball's through-hole with the pipeline, allowing smooth media flow.

• Closing: Rotate the valve stem 90° in the opposite direction, aligning the ball's through-hole perpendicular to the flow path; media pressure pushes the ball tightly against the outlet valve seat, with a tighter seal at higher pressures.

V-Type Ball Valve

V-Type Ball Valve

Structural Features

• V-shaped ball core: The hemispherical valve core has a V-shaped notch, which is the core component for regulation and shearing.

• Valve seat: It mates with the V-shaped notch to form a sealing surface. Soft seals (TFM, etc.) are suitable for clean media, while hard seals (welded or sprayed hard alloy) can be used in high-temperature, high-pressure, highly corrosive, or particulate-containing conditions.

Working Principle

• Regulation Function: As the valve core rotates, the overlap area between the V-shaped notch and the valve seat continuously changes, creating an equal percentage flow characteristic (opening degree and flow rate are logarithmically related), achieving high-precision control within the 30%-70% opening range.

• Shearing and Self-Cleaning: The V-shaped notch edge, in contact with the valve seat, cuts off fibers and small solid particles in the medium, preventing blockage; the relative movement between the valve core and valve seat during rotation scrapes away media residue on the sealing surface, achieving self-cleaning.

Thin Ball Valve

Thin Ball Valve

Structural Features

• Ultra-compact: 40%~60% shorter in length and 30%~50% lower in height than standard ball valves

• Lightweight: 30%~50% lighter, easier installation

• Connection: Mainly wafer type (clipped between two flanges), flange type is also available

• Opening and Closing: 90° rotation of the ball for quick shut-off/connection

• Low Flow Resistance: Full-bore design ensures smooth media flow and low pressure loss

• Excellent Sealing: Soft seal (PTFE/PPL) or metal seal, zero leakage

• Optional Features: Anti-static, fire-resistant structure, safety locking

Ceramic Ball Valve

Ceramic Ball Valve

Key Features:

1. Superior Corrosion Resistance: Zirconia/alumina ceramics are resistant to almost all acid, alkali, and salt media, and do not rust or corrode.

2. Ultra-High Wear and Erosion Resistance: The high hardness of the ceramic means it experiences almost no wear under particulate media and slurry erosion, resulting in a lifespan far exceeding that of stainless steel.

3. Stable Sealing and Non-Stuck-Up: The smooth ceramic surface does not scale or adhere, ensuring stable switching torque and preventing jamming.

4. Zero Leakage: Precision ceramic mating seals enable bidirectional sealing.

5. No Media Contamination: The ceramic's high inertness prevents metal ion precipitation, making it suitable for high-purity and clean environments.

Disadvantages: Relatively brittle, not resistant to severe impacts or sudden temperature changes; careful selection and installation are required.

+86 19858780995

+86 19858780995

+86 19858780995

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