BSP Check Valve 304 Stainless Steel Non-Return 1/8"–1/2" Water Gas

304 Stainless Steel BSP Male Check Valve – One-Way Non-Return Flow Control

Engineered for reliable one-way flow control, this 304 stainless steel BSP male check valve prevents backflow in water, gas, and oil systems. Available in four standard BSP thread sizes — 1/8", 1/4", 3/8", and 1/2" — it is a durable, corrosion-resistant solution for plumbing, hydraulic, and industrial piping applications. Made in Mainland China.

Key Specifications

• Material: 304 Stainless Steel
• Thread Type: BSP (Male to Male)
• Available Sizes:
  • DN6 = 1/8" = 9.5 mm (0.374")
  • DN8 = 1/4" = 12.5 mm (0.4724")
  • DN10 = 3/8" = 16 mm (0.6299")
  • DN15 = 1/2" = 20 mm (0.7874")
• Compatible Media: Water, Gas, Oil
• Minimum Working Pressure: 0.12 MPa / 1.2 Bar / 17 PSI
• Maximum Working Pressure: 3 MPa / 30 Bar / 428 PSI
• Maximum Working Temperature: 120°C (248°F)
• Pressure Rating: Medium Pressure
• Package Includes: 1 × Check Valve

Why Choose This Check Valve?

• ✅ 304 Stainless Steel Construction – Highly resistant to corrosion, rust, and chemical exposure, ensuring long service life even in demanding environments.
• ✅ True One-Way Flow – Prevents costly backflow and cross-contamination in pipelines, protecting pumps, compressors, and other equipment.
• ✅ Wide Compatibility – Suitable for water, gas, and oil media across a broad pressure and temperature range.
• ✅ Standard BSP Threading – Fits seamlessly into existing BSP-threaded piping systems for quick, tool-assisted installation.
• ✅ Compact & Lightweight – Minimal footprint makes it ideal for tight spaces in residential, commercial, and industrial installations.
• ✅ Multiple Size Options – Choose the exact thread size you need, from 1/8" to 1/2", to match your specific piping requirements.

Ideal Applications

• Residential and commercial plumbing systems
• Hydraulic and pneumatic circuits
• Oil and fuel line protection
• Industrial water treatment and piping
• Compressed gas line management
• Pump outlet protection

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Frequently Asked Questions

Q: What thread standard does this BSP check valve use?

A: This check valve uses BSP (British Standard Pipe) male-to-male threading, which is a widely adopted standard in plumbing and hydraulic applications worldwide. Available sizes are 1/8", 1/4", 3/8", and 1/2" BSP.

Q: Is this stainless steel check valve suitable for use with gas and oil, or only water?

A: Yes — this valve is rated for use with water, gas, and oil. Its 304 stainless steel construction provides excellent chemical and corrosion resistance across all three media types, up to a maximum pressure of 3 MPa (30 Bar / 428 PSI) and a maximum temperature of 120°C.

Q: What is the minimum working pressure required for the valve to function correctly?

A: The minimum working pressure needed to actuate the check valve is 0.12 MPa (1.2 Bar / 17 PSI). Below this threshold, the valve may not open fully. Ensure your system's operating pressure meets or exceeds this minimum for reliable one-way flow control.

Q: How many check valves are included per order?

A: Each order includes 1 × BSP male check valve in your selected thread size. Please select your required size (1/8", 1/4", 3/8", or 1/2") before adding to your cart.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.