Description
Piston Valve Manufacturer & Exporter in India
Unlike traditional globe or gate valves that rely on flat seat-to-disc contact, FlowBiz Piston Valves utilize a metallic piston traveling between two resilient sealing rings. This unique lower and upper ring design ensures that sealing occurs on the outer surface of the piston, effectively shielding the sealing area from direct media velocity, fluid erosion, and wire-drawing in high-pressure steam utility lines.
Engineering Advantages & Sealing Mechanism
- Burnished Piston Sealing: The stainless steel piston is surface-ground and burnished to slide smoothly through compressible graphite rings, creating a large, durable circumferential seal.
- Erosion-Protected Seat Design: Fluid passing through the valve never impacts the sealing face directly, preventing premature seat degradation during throttling operations.
- Self-Cleaning Action: As the piston slides through the rings, it automatically clears debris, scale, and particulate buildup from the internal chamber, maintaining an effective seal.
- Inline Seal Maintenance: Over long operation cycles, sealing compression can be easily restored by tightening the external gland nuts—eliminating line shutdowns for seat replacement.
Technical Specifications & Construction
Specification Parameter | Standard Engineering Range |
Nominal Sizes | 1/2" (DN15) to 8" (DN200) |
Pressure Ratings | Class 150, Class 300, Class 800 / PN16, PN25, PN40 |
Body Construction | Cast Carbon Steel (WCB), Forged Steel (A105), Stainless Steel (CF8M/SS316) |
Piston Material | AISI 304 / AISI 316 Stainless Steel (Hardened & Precision Ground) |
Ring Material | Expanded Graphite with SS Wire Reinforcement / KX-Rings / Reinforced PTFE |
Connection Ends | Flanged Ends (ASME B16.5), Screwed NPT/BSP, Socket Weld (SW) |
Design & Test Standards | Designed to ASME B16.34; Pressure tested to API 598 / EN 12266-1 |
Where FlowBiz Piston Valves excel
FlowBiz piston valves are specifically engineered for high-temperature steam lines, thermal fluid systems, boiler blowdown networks, and chemical transfer lines where zero stem leakage and long service intervals are mandatory.
Contact FlowBiz Exports for engineering drawings, thermal rating charts, or an instant commercial quote for your process requirements.