High Pressure Stainless Steel Female Inline Check Valve

Product Introduction

This heavy-duty stainless steel inline check valve provides reliable, leak-tight backflow prevention in high-pressure and high-temperature piping systems. Utilizing a robust split-body design machined from premium hex bar stock, it features female threaded connections for seamless integration into instrumentation and process lines. Engineered to withstand aggressive media, it ensures unidirectional flow with minimum pressure drop.

Technical Specifications

• Valve Type: Inline Lift Check Valve / Non-Return Valve

• Body Structure: Three-Piece Split Body / Hex Bar Stock Design

• Material Construction: ASTM A182 F316 / F304 Stainless Steel

• Connection Type: Female Threaded (Inlet and Outlet)

• Thread Standards: NACE compliant NPT, BSPT, or BSPP (ISO 7/1 / ISO 228)

• Size Range: 1/4", 3/8", 1/2", 3/4", 1", 1-1/2", 2"

• Max Nominal Pressure: 3000 psi to 6000 psi (206 bar to 414 bar)

• Operating Temperature Range: -20°F to 400°F (-28°C to 204°C) with fluorocarbon seals; up to 600°F (315°C) with metallic seals

• Cracking Pressure: Standard 1/3 psi to 25 psi (0.02 bar to 1.7 bar) options available

• Poppet/Disc Design: Self-aligning guided poppet for stable sealing

• Spring Material: Heavy-duty 316 Stainless Steel / Inconel X-750 (Optional)

• Seal/Seat Material: Viton (FKM), PTFE, PEEK, or Metal-to-Metal for high temperatures

• Flow Pattern: Straight-through inline flow

• Orifice Sizes: Full flow design minimized to reduce fluid turbulence

• Surface Finish: Cleaned and passivated industrial/laboratory finish

• Applicable Media: Water, oil, gas, steam, and corrosive chemical fluids

• Traceability: Heat number and material grade laser-etched on the valve body

• Quality Testing: 100% factory tested for cracking and rescaled shell/seat tightness

• Design Standards: Conforms to ASME B16.34 instrumentation guidelines

• Certifications: NACE MR0175 / MR0103 compliant for sour gas applications (Upon request)