Forged Steel Valves

High Pressure Flanged Hex Body Non-Return Valve SS316

Flanged Check Valve
Flanged Inline Check Valve
Flanged Non-Return Valve (NRV)
Hex Body Flanged Check Valve
Description: high-pressure stainless steel flanged inline check valves. Features a rugged hex block body and ASME B16.5 flanges for secure, leak-free backflow prevention.
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Product Introduction

This industrial-grade stainless steel flanged inline check valve delivers superior backflow prevention for high-pressure and critical chemical process lines. Engineered with a robust split-body design from premium hex and round bar stock, it features integrated raised face (RF) flanges for a secure, bolt-on piping connection. With its corrosion-resistant construction and guided internal poppet, this non-return valve ensures low pressure drop, positive sealing, and maximum reliability in demanding environments.

Technical Specifications

Valve Type: Flanged Inline Lift Check Valve / Non-Return Valve
Body Design: Multi-piece split body / Machined hex bar stock
Material Construction: ASTM A182 F316 / F316L / F304 Stainless Steel
Connection Type: Flanged Ends (Inlet and Outlet)
Flange Facing: Raised Face (RF) / Ring Type Joint (RTJ) options
Flange Standards: ANSI/ASME B16.5, EN 1092-1, or JIS B2220
Pressure Ratings: Class 150, Class 300, Class 600, Class 1500 / PN16 to PN100
Size Range: 1/2", 3/4", 1", 1-1/2", 2" (DN15 to DN50)
Operating Temperature: -20°F to 400°F (-28°C to 204°C) with FKM; up to 600°F (315°C) with metal-to-metal seats
Cracking Pressure: Standard 1/3 psi to 10 psi (0.02 bar to 0.7 bar), custom springs available
Sealing Design: Self-aligning guided poppet with spring-assisted closure
Spring Material: Heavy-duty 316 Stainless Steel / Inconel X-750 (Optional)
Seat/Seal Material: Viton (FKM), PTFE, PEEK, or Metal-to-Metal
Flow Configuration: Straight-through horizontal or vertical inline flow
Body Manufacturing: Forged and precision CNC machined components
Surface Finish: Cleaned, descaled, and passivated finish
Applicable Media: Water, steam, oil, aggressive chemicals, and corrosive gases
Testing Guidelines: 100% factory hydro-pneumatic tested per API 598 / EN 12266-1
Traceability: Heat number and pressure class permanently stamped on the flanges/body
Compliance: NACE MR0175 / ISO 15156 compliant for sour gas service (Upon request)