Discover the right blow off valve type for your system. Reduce downtime by up to 40% and ensure overpressure protection with our factory-direct, certified valves.
Target audience: Purchasing managers, technical directors, operations managers seeking reliable, cost-effective pressure relief solutions.
Get Free Quote in 24 HoursOverpressure incidents in industrial systems can lead to catastrophic equipment failure, production halts, and safety risks. Yet many buyers struggle with:
According to industry data, improper valve selection causes 23% of pressure-related accidents in process plants. It’s time to take control.
Blow off valves (also called pressure relief valves or safety valves) are critical components that automatically release fluid when pressure exceeds a set limit. Below we cover the main types used in industrial applications.
The most common type. Uses a spring to hold the disc against the seat. When inlet pressure overcomes spring force, the valve opens. Best for: clean fluids, steam, air, water. Limitation: may chatter near set pressure.
A small pilot valve controls the main valve. Offers precise set pressure, tight shut-off, and ability to handle high backpressure. Ideal for: gas systems, high-pressure steam, applications requiring frequent cycling.
Uses a bellows to isolate the spring from the process fluid. Prevents corrosion and compensates for backpressure. Used in: chemical, petrochemical, and corrosive media.
Designed to protect against thermal expansion in closed systems (e.g., pipelines, heat exchangers). Usually small, spring-loaded.
While often used interchangeably, safety valves open rapidly (pop action) for compressible fluids, while relief valves open proportionally for liquids. Blow off valves typically refer to valves for air or steam systems that release large volumes quickly.
Designed to your exact pressure, size, material, and connection requirements. Thriveon specializes in OEM blow off valves with short lead times.
Each type has specific advantages. Our engineering team can help you match the right valve to your system – contact us for a free consultation.
| Application | Recommended Type | Key Requirement |
|---|---|---|
| Boiler steam system | Spring-loaded / Pilot | ASME Section I |
| Compressed air line | Direct spring-loaded | Low cost, high capacity |
| Chemical reactor | Balanced bellows | Corrosion resistance |
| Pipeline thermal expansion | Thermal relief | Compact size |
| High-pressure gas storage | Pilot-operated | Accurate set pressure |
types of shut off valves types of air valves types of valves
Below are standard parameters for valves we manufacture. Customization available.
| Parameter | Available Options |
|---|---|
| Pressure Rating | 150 psi to 1500 psi (10 bar – 100 bar) |
| Size Range | ½” to 12” (DN15 – DN300) |
| Body Materials | Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel, Brass |
| Connections | Threaded (NPT/BSP), Flanged (ANSI/DIN), Butt Weld, Socket Weld |
| Temperature Range | -40°C to 400°C (-40°F to 752°F) |
| Certifications | ISO 9001, CE, ASME (Section I/VIII available on request), RoHS, REACH |
| Lead Time | Standard: 2 weeks; Custom/OEM: 4 weeks |
Need different spec? Email us at info@thriveonvalve.com – we deliver fast.
Thriveon supplies blow off valves to clients in 20+ countries, including the USA, Saudi Arabia, South Africa, and Italy.
“We switched to Thriveon’s blow off valves for our compressed air network. Their product quality exceeded our expectations and we reduced costs by 37%. Delivery was on time every time.”
– Robert K., VP Operations, Midwest Manufacturing USA
“Thriveon helped us design a custom pilot-operated valve for our high-pressure gas system. Their technical support saved us weeks of engineering time.”
– Ahmed M., Project Manager, Oil & Gas, Saudi Arabia
Certifications: ISO 9001:2015, CE, RoHS, REACH. ASME and other certifications available per request.
A blow off valve is typically used for air or steam systems where rapid, full-opening discharge is required. Safety relief valves are designed for liquid or gas systems with more controlled opening. However, the terms are often used interchangeably in industry.
For boiler systems, a spring-loaded safety valve (pop-type) meeting ASME Section I is recommended. Pilot-operated valves are suitable for large boilers with high pressures.
Absolutely. At Thriveon, we offer OEM custom blow off valves with pressure settings from 10 to 1000+ psi. Our engineers will work with your specifications. Minimum order quantity may apply.
Our standard valves are CE marked, ISO 9001 certified, and RoHS compliant. ASME certification (Section I/VIII) can be provided on request for applicable models.
Standard lead time is 2 weeks. Custom orders 4 weeks. We consolidate shipments to reduce freight costs – average door-to-door delivery to US ports is 25–30 days. We offer FOB, CIF, and DDP terms.
Yes, we offer free samples for qualified buyers. You pay only shipping. Contact us with your requirements and we will arrange a sample.
Selection depends on flow rate, set pressure, and pipe connection. Use our valve sizing calculator or send your system parameters to our engineering team for a recommendation.
Get factory-direct pricing, fast delivery, and expert selection support for your blow off valves. Limited-time offer: Free sample for first-time buyers (pay only shipping).
Or contact us directly: Tel: +86-311-86935302 | Email: info@thriveonvalve.com
Risk-free: 30-day money-back guarantee on all standard valves.
“We’ve been using Thriveon’s blow off valves for over a year now. Zero failures, and their tech support is exceptional. Highly recommend for anyone needing reliable pressure relief.”
“The custom pilot-operated valve we ordered arrived ahead of schedule. It performs perfectly in our high-pressure gas system. Cost savings of 30% compared to previous supplier.”
“Thriveon helped us transition from a European supplier with faster delivery and better pricing. The quality is top-notch – certified for our application.”
“We ordered a bulk of spring-loaded blow off valves for our compressor stations. Thriveon’s team ensured all valves were tested and documented. Excellent service.”
“Their inventory of standard sizes meant we got our valves in 10 days instead of waiting 8 weeks from other suppliers. Quality is as good as any premium brand.”
About the Author: David Chen
Senior Industrial Valve Engineer with 15+ years of experience in valve design, testing, and application engineering. David has helped over 200 clients worldwide select the right pressure relief valves for their systems. He leads the engineering team at Ningjin Thriveon Valve Co., Ltd., and is passionate about delivering safe, cost-effective solutions.
Connect: info@thriveonvalve.com
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+86-311-86935302
+86-311-86935302
Email Us:
info@thriveonvalve.com
South of Huanmadian Village Town, Ningjin County, Xingtai, Hebei Province, China 
