Eliminate system downtime and safety risks with precision-engineered over pressure relief valves built for harsh environments. Designed for procurement managers and plant engineers who demand reliability, fast lead times, and zero compromise on quality.
✅ 500+ valves shipped weekly to USA, Saudi Arabia, South Africa & Italy | ⏱ 15-day lead time
Every day without a reliable over pressure relief valve, your plant is exposed to:
You need a partner who delivers certified, repeatable quality — not just a valve, but peace of mind.
At Ningjin Thriveon Valve Co., Ltd., we combine 10+ years of valve engineering experience with ISO 9001-certified manufacturing to produce over pressure relief valves that outperform in the most demanding applications — from oil & gas to chemical processing and power generation.
We own the entire production chain — casting, machining, assembly, and testing. This vertical integration gives us 100% quality traceability and the ability to deliver standard valves in 15 days, custom designs in 25 days.
Every valve is tested to ASME Section VIII, API 527, and ISO 4126 standards. Our in-house lab performs 100% seat leakage testing, set pressure verification, and material certification. CE, RoHS, and ISO 9001 compliant.
Need a special flange rating, exotic alloy trim, or custom set pressure? Our engineering team — with over a decade of experience — designs valves to your exact specs. We support ASME B16.5, DIN, JIS, and GOST standards.
Inventory of 800+ units ready to ship. Standard lead time: 15 working days (vs. industry average of 8–12 weeks). We serve the USA, Saudi Arabia, South Africa, Italy, and 12+ other countries with reliable logistics.
No middlemen, no markups. Our pricing is 20–35% lower than European and American brands for equivalent quality. We accept T/T, L/C, and PayPal. Transparent pricing with no hidden fees.
Every order comes with free installation guides, CAD drawings, and a dedicated valve engineer assigned to your account. We answer inquiries within 4 hours during business days.
| Parameter | Standard Range | Custom Options |
|---|---|---|
| Size (DN) | DN15 – DN400 | DN6 – DN600 |
| Pressure Class | ASME 150# – 600# | ASME 900# – 2500# |
| Set Pressure Range | 0.5 – 50 bar | Up to 400 bar |
| Body Materials | WCB, CF8, CF8M | Monel, Inconel, Duplex SS |
| Trim Materials | 304 SS, 316 SS | Hastelloy, Stellite |
| End Connections | Flanged (RF, FF), Threaded | BW, SW, NPT, BSP |
| Compliance | ASME VIII, API 527, ISO 4126 | CE, CRN, ATEX (on request) |
| Leakage Rate | API 527 Class I | Class II – VI |
| Operating Temp | -29°C to +260°C | -196°C to +650°C |
| Lead Time (Standard) | 15 working days | 7 days (express) / 25 days (custom) |
steam pressure relief valve pressure relief safety valves pressure regulator with relief valve
"We replaced our previous German supplier with Thriveon's over pressure relief valves across two refinery units. Set pressure accuracy improved by 12%, and we saved 31% on total acquisition cost. Their engineering support made the transition seamless."
"Thriveon delivered 120 custom relief valves for our chemical expansion project in just 22 days — half the time our previous supplier quoted. The valves passed third-party inspection with zero non-conformances."
"We have been sourcing butterfly and relief valves from Thriveon for over 3 years. Their quality consistency and on-time delivery are exceptional. They understand our needs and always offer cost-effective solutions."
Safety valves open rapidly (pop action) for compressible fluids like steam or gas. Relief valves open proportionally for incompressible fluids like liquids. An over pressure relief valve can refer to either type. Thriveon manufactures both — including safety relief valves that combine both functions for multi-phase systems.
Set pressure should be equal to or less than the MAWP (Maximum Allowable Working Pressure) of the protected equipment per ASME Section VIII. For systems with multiple relief devices, staggered set pressures are used. Our engineers provide free sizing and selection — just share your operating pressure, temperature, and fluid properties.
Yes. All our over pressure relief valves are designed to ASME Section VIII Division 1 and tested per API 527. We provide full material traceability, pressure test reports, and a Certificate of Compliance with every shipment. CE, PED, and CRN certifications are also available.
Standard custom valves (exotic materials, special flanges, non-standard set pressures) ship in 25 working days. For urgent needs, we offer an express service that delivers in 7–10 days with a small expedite fee. Standard valves from stock ship within 15 working days.
We follow a 6-step quality protocol: (1) incoming material inspection with chemical analysis, (2) CNC machining with ±0.01mm tolerance, (3) subassembly testing, (4) 100% seat leakage test at 1.1x set pressure, (5) final functional test, and (6) third-party inspection on request. Our ISO 9001:2015 system ensures every valve meets the same standard.
We accept T/T (wire transfer), L/C (irrevocable letter of credit), PayPal, and Western Union for small orders. For first-time buyers, we typically require 30% deposit and 70% against shipping documents. Long-term partners enjoy flexible net-30/60 terms subject to credit approval.
Absolutely. We offer free samples for qualified buyers (you pay shipping). Sample valves are fully tested and certified. We also provide 3D CAD models and dimensional drawings for your engineering team to evaluate. Just submit an inquiry and we'll prepare a sample within 5 days.
All over pressure relief valves carry a 24-month warranty against manufacturing defects. We also offer a 10-year spare parts guarantee for every model we produce. If any issue arises, our engineers provide remote diagnosis within 4 hours and replacement parts ship within 48 hours.
📢 Limited-Time Offer: Free valve sizing & technical proposal for all inquiries received this month. No obligation, no pressure.
📞 Call/WhatsApp: +86-311-86935302 | ✉️ Email: info@thriveonvalve.com
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"Thriveon's relief valves are rock solid. We've been using them on our compressor stations for 2 years — zero failures, zero leaks. Their pricing is 40% less than what we paid before. Highly recommended for plant engineers who value reliability."
"Our company ordered 50 custom over pressure relief valves for a seawater desalination project. Thriveon delivered in 18 days — including Hastelloy trim and special flange facing. The quality exceeded our expectations. Will definitely order again."
"I've been sourcing valves for 15 years. Thriveon is one of the most responsive and technically competent suppliers I've worked with. Their valve sizing support saved us from a costly over-spec situation. Trustworthy partner."
"We needed a quick turnaround for a shutdown maintenance. Thriveon supplied 12 relief valves in 10 days express — all certified and ready to install. The only reason for 4 stars is we would like more regular stock updates on their website."
"First time buying from China with hesitation, but Thriveon changed my mind. Professional communication, fast shipping, and the valves are top quality. We installed them in our steam system and they passed inspection without any issues."
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Call us on:
+86-311-86935302
+86-311-86935302
Email Us:
info@thriveonvalve.com
South of Huanmadian Village Town, Ningjin County, Xingtai, Hebei Province, China 
