Air Compressor Relief Valves
Your Reliable Safety Solution
Air compressor relief valves are essential safety components that protect equipment and personnel by releasing excess pressure from the system. When operating conditions exceed safe limits, a relief valve automatically opens to prevent damage, maintain pressure control, and ensure operational compliance.
JHFOSTER supplies a wide selection of high-quality relief valves for industrial compressed air systems. Our inventory includes a broad range of sizes, pressure ratings, and connection types to suit your specific application and compressor model. With over 200 air compressor relief valves in stock, we help businesses across the Upper Midwest meet their safety, compliance, and performance needs—fast.
Whether you’re replacing a worn component or outfitting a new system, our team provides expert guidance and dependable parts from trusted brands.
Our Most Popular Air Compressor Relief Valves
These top-selling relief valves are known for their reliability, precise performance, and industry certifications. Each is designed to maintain safety and efficiency across a range of industrial applications.
| Brass Relief Valve – ¼” NPT, 150 psi Compact, corrosion-resistant safety valve ideal for shop compressors and small systems.  Get a Quote | Stainless Steel Relief Valve – ½” NPT, 300 psi High-pressure valve suitable for washdown or food-safe environments.  Get a Quote | Adjustable Pressure Relief Valve – ⅜” NPT, 50–175 psi Field-adjustable valve offering flexible protection across varying loads.  Get a Quote |
| Pop-Off Safety Valve – ¾” NPT, 250 psi Quick-acting valve for high-capacity rotary screw and piston compressors.  Get a Quote | ASME-Certified Relief Valve – 1″ NPT, 200 psi Code-stamped valve for regulated installations requiring compliance with pressure vessel codes.  Get a Quote | Temperature-Resistant Relief Valve – ¼” NPT, 180 psi Performs reliably in elevated ambient or system temperatures. Get a Quote |
| High-Flow Relief Valve – 1¼” NPT, 400 psi Engineered for large industrial systems needing rapid pressure offload. Get a Quote | Inline Relief Valve – ½” Tube Connection, 250 psi Compact inline option for skid systems and confined installations.  Get a Quote | Low-Pressure Relief Valve – ⅛” NPT, 75 psi Ideal for lighter-duty equipment or secondary protection zones. Get a Quote |
Air Compressor Relief Valve Features
Choosing the correct relief valve is critical for maintaining system safety and regulatory compliance. There are some key specifications and features to evaluate.
Pressure Ratings
Available in a wide range of ratings from 50 psi to 500+ psi, supporting everything from small compressors to high-capacity industrial systems.
Material Compatibility
- Brass – Corrosion-resistant and suitable for general industrial use.
- Stainless Steel – Ideal for harsh or sanitary environments.
- Steel – Durable and commonly used in high-pressure or rugged settings.
Size and Connection Types
- Offered in ⅛” to 2″ NPT and tube-style connections for compatibility with most compressor systems.
Certifications
- Many relief valves are ASME, CRN, or CE certified, meeting industry standards for safety and compliance.
Flow Rates
- Relief valves are sized for proper flow capacity, ensuring the system can release pressure fast enough to prevent over-pressurization.
Contact Us About Air Compressor Relief Valves
JHFOSTER proudly serves industrial customers across Minnesota, Iowa, North Dakota, South Dakota, and Wisconsin. We can ship to or bill any business located within the Upper Midwest.
Our team is ready to help you select the right relief valve for your compressed air system. We provide expert guidance and fast turnarounds for a wide range of needs, from replacing an existing part to specifying a component for a new system.
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