Description
In-Line Non Return Valve (NRV) Manufacturer & Exporter in India
FlowBiz Exports is a leading manufacturer, supplier, and exporter of high-precision In-Line Non Return Valves (In-Line Check Valves) engineered for automatic, linear backflow prevention in liquid and gas pipelines. Built with a compact cylindrical design, our in-line NRVs deliver smooth fluid dynamics, leak-proof sealing, and dependable performance across critical industrial flow applications.
Key Features & Engineering Excellence
Our in-line check valves feature an internal spring-loaded poppet or disc mechanism that opens when upstream pressure exceeds crack pressure and seals instantly upon flow cessation or backpressure.
- Straight-Through Flow Path: Linear internal geometry minimizes fluid turbulence and maintains low pressure drop across the valve body.
- Instant Backflow Protection: Spring-assisted closure ensures rapid shutting action before fluid reversal occurs, eliminating backflow and hammer shock.
- Space-Saving In-Line Design: Compact body installs directly into existing pipeline runs without altering pipe axis or alignment.
- Zero-Leakage Performance: Soft-seated and metal-seated sealing options guarantee tight shutoff for liquids, air, and technical gases.
Material Specifications & Manufacturing Range
FlowBiz manufactures in-line NRVs in high-grade corrosion-resistant metals and resilient seating materials:
- Body Materials: Stainless Steel (SS304, SS316, SS316L), Carbon Steel (A216 WCB), Forged Brass / Bronze, Forged Carbon Steel (A105), and Special Alloys.
- Seat Options: PTFE / Teflon, Viton (FKM), NBR, EPDM, and Metal-to-Metal.
- Size Range: 1/4 inch to 4 inches (DN8 to DN100) threaded/welded; up to 12 inches flanged.
- Pressure Ratings: PN10, PN16, PN40, Class 150, Class 300, Class 800, Class 1500, up to 3000 PSI high-pressure variants.
- End Connections: Female NPT / BSP Screwed, Socket Weld (SW), Tube Fittings, and Flanged Ends.
Testing & Quality Compliance
Every in-line non return valve undergoes strict pressure testing and seat integrity verification prior to dispatch:
- Design Standards: ASME B16.34, BS 5153 / API 6D specifications
- Inspection & Testing: API 598 / ISO 5208
- Thread Standards: ANSI B1.20.1 (NPT) / ISO 228 (BSP)
Industrial Applications
FlowBiz in-line check valves are widely used across diverse industrial sectors, including:
- Chemical & Process Piping Networks
- Compressed Air & Industrial Gas Systems
- Hydraulic & Pneumatic Control Circuits
- Water Treatment, Dosing & Filtration Plants
- Oil & Fuel Transfer Lines
Why Choose FlowBiz Exports?
Contact FlowBiz Exports today for technical specifications, custom crack pressure settings, or a fast price quotation for your requirement.