Product Overview
The PQ340H top-entry eccentric semi-ball valve is a high-performance industrial valve engineered for reliable flow control in demanding applications. Its unique double-eccentric design minimizes seal wear and delivers bubble-tight shut-off, making it ideal for handling abrasive media such as slurry, sewage, coal ash, and other fluids containing solid particles.
Key Features & Benefits
- Low Pressure Loss: Full-bore flow path ensures zero resistance when fully open, eliminating media buildup in the valve cavity.
- Reliable Sealing: The ball only contacts the seat at the final closing stage, reducing friction and wear, while self-polishing the seat surface for long-term tightness.
- Suitable for Abrasive Media: Ideal for fluids with fibers, small particles, or slurry, as the design resists clogging and erosion.
- High-Speed Flow Capability: Straight-through flow path and robust eccentric shaft ensure stable operation even in high-velocity flow conditions.
- Long Service Life: No easily worn components; the eccentric action eliminates seal friction during operation.
- Easy Maintenance: Top-entry design allows in-line repairs without removing the valve from the pipeline, reducing downtime.
- Versatile Applications: Suitable for water, wastewater, steam, gas, natural gas, oil, and other industrial fluids.
Design & Compliance Standards
- Design: GB/T 26146-2010 (Eccentric Ball Valves)
- Flange Connection: GB/T 9115 (or custom per customer requirements)
- Face-to-Face Dimension: GB/T 12221-2005 + company internal standards
- Pressure Testing: GB/T 13927-2008
Main Parts & Materials
| Component |
Gray Cast Iron |
Ductile Iron |
Cast Steel |
| Body |
Gray Cast Iron |
Ductile Iron |
Cast Steel |
| Bonnet |
Gray Cast Iron |
Ductile Iron |
Cast Steel |
| Stem |
2Cr13 |
2Cr13 |
2Cr13 |
| Seat |
Stainless Steel |
Stainless Steel |
Stainless Steel |
| Ball Crown |
Ductile Iron with rubber lining / Stainless Steel |
Stainless Steel |
Cast Steel with rubber lining / PF / Cast Steel |
| Half Ball |
Gray Cast Iron |
Ductile Iron |
Cast Steel |
Applications
- Water & Wastewater: Sewage treatment plants, raw water intake systems.
- Mining & Metallurgy: Slurry pipelines, ash handling systems.
- Power Generation: Cooling water systems, flue gas desulfurization (FGD).
- Oil & Gas: Pipeline transportation, refinery processes.
- General Industry: Any application requiring reliable shut-off for abrasive or particle-laden fluids.
Why Choose Our PQ340H Valve?
- Customization: Tailored solutions to meet specific project requirements (size, pressure, material, actuation).
- Quality Assurance: Manufactured under ISO 9001 quality management system, with all valves pressure-tested before shipment.
