Description of 3-Piece Screw End Ball Valve
A 3-piece ball valve is a type of valve with three main body components: two end caps and a central body that houses the ball. The screw end refers to threaded connections (usually NPT or BSP) at both ends, allowing it to be easily connected to pipelines.
Key features:
1. Design:
Three-piece body allows the middle section to be removed without disturbing the pipeline.
Contains a hollow, perforated, and pivoting ball that controls the flow.
2. Connection:
Screw/Threaded ends for easy installation or replacement.
3. Materials:
Commonly made from stainless steel (SS304, SS316), carbon steel, or brass.
4. Operation:
Quarter-turn operation (90°) with a lever or actuator.
Can be manual or pneumatic/electric actuated.
5. Sealing:
Soft seat (PTFE, RPTFE) or metal seat for tight shut-off.
6. Pressure & Temperature Range:
Can handle high pressures (up to 100 bar or more) and temperatures from -20°C to 200°C depending on material and seat type.
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Uses in Industry
3-piece screw end ball valves are widely used in industries that require reliable, leak-proof, and easily maintainable flow control.
1. Chemical Industry:
For handling corrosive or toxic liquids and gases.
Example: Acids, alkalis, solvents.
2. Pharmaceutical Industry:
For sanitary pipelines, especially in clean-in-place (CIP) systems.
Easy disassembly helps maintain hygiene.
3. Food & Beverage Industry:
For controlling liquids like juices, milk, syrups.
Hygienic design prevents contamination.
4. Oil & Gas Industry:
For controlling fuel, oil, or gas flow.
Can be used in high-pressure pipelines.
5. Water Treatment & Utilities:
For water, wastewater, or cooling system pipelines.
6. Industrial Process Piping:
Anywhere flow shut-off or regulation is needed with minimal pressure drop.
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✅ Advantages:
Easy maintenance (3-piece design allows removal without pipeline disconnection).
Durable and leak-proof.
Quick operation (quarter-turn).
Suitable for high-pressure and high-temperature applications.
