For over 15 years, we have been a trusted supplier of proportional relief valves to wholesalers, distributors, and large contractors worldwide. Our mission is to solve your supply challenges and help expand your market share. Partner with Beyond Fluid to achieve lasting business success.
Beyond Fluid offers proportional relief valves that open when system pressure reaches the set pressure and close when it falls below. Multiple springs are available to select different set pressure ranges. Back pressure (the pressure at the valve outlet) increases the set pressure of these valves.
These proportional relief valves open gradually with increasing pressure and do not have a rated capacity at a specific pressure rise (accumulation). A variety of end connections are available, including female/male NPT, BSPT, BSPP, metric threads, and double ferrule compression fittings.
These valves ensure precise pressure control and prevent spikes in hydraulic, gas, and fluid systems.
Feature:
Connection: Twin-ferrule | Pressure: 300 PSI, 6000 PSI | Size: 1/8"-1", 6 mm to 12 mm | Material: SS304, SS316
Connection: NPT, BSPT | Pressure: 300 PSI, 6000 PSI | Size: 1/8"-1", 6 mm to 12 mm | Material: SS304, SS316
Connection: NPT, BSPT | Pressure: 300 PSI, 6000 PSI | Size: 1/8"-1", 6 mm to 12 mm| Material: SS304, SS316
| NO. | Component | Materia |
|---|---|---|
| 1 | Body | 316 SS/A182 |
| 2 | Seat | 316 SS/A479 |
| 3 | O-ring | Fluorocarbon FKM |
| 4 | Gasket | PEEK |
| 5 | Seat Retainer | 316 SS/A479 |
| 6 | O-ring | Fluorocarbon FKM |
| 7 | Stem | 316 SS/A479 |
| 8 | O-ring | Fluorocarbon FKM |
| 9 | Bonnet | 316 SS/A479 |
| 10 | Spring Support | 316 SS/A479 |
| 11 | Spring | S17700 SS/AMS 5678 |
| 12 | Lock Nut | 17-4PH |
| 13 | Label | Polyester |
| 14 | Bonnet Cap | 316 SS/A479 |
| NO. | Component | Materia |
|---|---|---|
| 1 | Body | 316 SS/A182 |
| 2 | Seat | 316 SS/A479 |
| 3 | Retainer | 316 SS/A479 |
| 4 | Square sealing piece | Fluorocarbon FKM |
| 5 | Bonnet | 316 SS/A479 |
| 6 | O-ring | Fluorocarbon FKM |
| 7 | Spring Support | 316 SS/A479 |
| 8 | Spring | S17700 SS/AMS 5678 |
| 9 | Lock Nut | 17-4PH |
| 10 | Label | Polyester |
| 11 | Bonnet Cap | 316 SS/A479 |
| NO. | Component | Materia |
|---|---|---|
| 1 | Body | 316 SS/A182 |
| 2 | Gasket | 316 SS/A479 |
| 3 | Seat | 316 SS/A479 |
| 4 | Bonnet Disc | 316 SS/A479+FKM |
| 5 | Stem | 316 SS/A479 |
| 6 | Retainer | 316 SS/A479 |
| 7 | Quad Seal | Fluorocarbon FKM |
| 8 | O-ring | Fluorocarbon FKM |
| 9 | Bonnet | 316 SS/A479 |
| 10 | Spring Support | 316 SS/A479 |
| 11 | Spring | S17700 SS/AMS 5678 |
| 12 | Lock Nut | 17-4PH |
| 13 | Sleeve | 304SS/A240 |
| 14 | Label | Polyester |
| 15 | Bonnet Cap | 316 SS/A479 |
| Series | RA3 | RA4 | RL3, RL4 |
|---|---|---|---|
| Inlet Working Pressure | 6000 psig (413 bar); up to 8000 psig (551 bar) during relief |
6000 psig (413 bar) | 300 psig (20.6 bar) |
| Outlet Working Pressure | 1500 psig (103 bar) | 2500 psig (172 bar) | 225 psig (15.5 bar) |
| Set Pressure | 50 to 6000 psig (3.5 to 413 bar) | 50 to 1500 psig (3.5 to 103 bar) | 10 to 225 psig (0.7 to 15.5 bar) |
| Seal Material | Fluorocarbon FKM Buna N Neoprene Ethylene propylene Perfluorocarbon FFKM |
Fluorocarbon FKM Buna N Neoprene Ethylene propylene |
Fluorocarbon FKM Buna N Neoprene Ethylene propylene |
| Temperature °F (°C) |
FKM | Buna N | Neoprene | Ethylene propylene | FFKM | RA4 Buna N | RA4 Neoprene | RL Buna N | RL Neoprene |
|---|---|---|---|---|---|---|---|---|---|
| −40 (−40) | — | ||||||||
| −30 (−34) | — | ||||||||
| −10 (−23) | — | ||||||||
| 0 (−17) | — | ||||||||
| 10 (−12) | |||||||||
| 25 (−4) | 6000 (413) | ||||||||
| 30 (−1) | 6000 (413) | 6000 (413) | |||||||
| 40 (4) | 6000 (413) | 6000 (413) | |||||||
| 50 (10) | 225 (15.5) | 225 (15.5) | |||||||
| 70 (20) | 225 (15.5) | 225 (15.5) | |||||||
| 150 (65) | 5580 (384) | 5580 (384) | 5580 (384) | 5580 (384) | 3000 (207) | 1500 (103) | |||
| 200 (93) | 5160 (355) | 5160 (355) | 5160 (355) | 5160 (355) | 1500 (103) | 1500 (103) | |||
| 250 (121) | 4910 (338) | 4910 (338) | 4910 (338) | 4910 (338) | |||||
| 275 (135) | — | 4660 (321) | |||||||
| 300 (148) | — | ||||||||
Note: Outlet pressure should not exceed inlet pressure.
Relief valves OPEN when system pressure reaches the set pressure and CLOSE when system pressure falls below the set pressure.
❗ For valves not actuated for a period of time, initial relief pressure may be higher than the set pressure.
Every proportional relief valve is tested for set and resealing performance.
| Series | Test Set Pressure psig (bar) |
Minimum Resealing Pressure as a Percentage of Set Pressure, % |
|---|---|---|
| RA3, RA4 | 100 to 200 (6.8 to 13.7) | 50 |
| RA3, RA4 | 850 to 1000 (58.5 to 68.9) | 84 |
| RL3, RL4 | 10 to 20 (0.7 to 1.3) | 50 |
| RL3, RL4 | 175 to 225 (12.0 to 15.5) | 91 |
High-Pressure Valves (RA3 and RA4 Series)
The effect of system back pressure is minimized by the design of these high-pressure valves.
Low-Pressure Valves (RL3 and RL4 Series)
System back pressure increases the set pressure of the valve. To compensate, multiply the back pressure by 0.8 and subtract the result from the desired set pressure. Use the result to pre-set the valve while back pressure is equal to atmospheric pressure.
Relief valves are proportional relief valves that open gradually as the pressure increases. Consequently, they do not have a capacity rating at a given pressure rise (accumulation), and they are not certified to ASME or any other codes.
❗ Some system applications require relief valves to meet specific safety codes. The system designer and user must determine when such codes apply and whether these relief valves conform to them.
❗ Beyond Fluid proportional relief valves should never be used as ASME Boiler and Pressure Vessel Code safety relief devices.
❗ Beyond Fluid proportional relief valves are not “Safety Accessories” as defined in the Pressure Equipment Directive 2014/68/EU.
At Beyond Fluid, we pride ourselves on our comprehensive expertise in engineering and designing proportional relief valves. From the initial concept to the final product, our team is equipped to transform your ideas into tangible, high-quality hydraulic solutions. Our commitment to innovation ensures that we deliver not just products, but value-driven solutions tailored to your needs.
Beyond Fluid has over 15 years of experience supplying proportional relief valves to wholesalers, distributors, and large contractors. We offer reliable quality, excellent service, on-time delivery, and competitive prices. Our commitment to advanced technology, precision engineering, and strict quality standards ensures we meet the diverse needs of customers worldwide.
We take pride in producing high-quality proportional relief valves. Our comprehensive range of products is designed for optimal performance and durability, with both standard and customized solutions. We aim to be your long-term trusted partner to expand your market presence.
When you choose Beyond Fluid, you ensure precision and reliability, backed by our strict Quality Assurance Program.
Beyond Fluid ensures reliability with a 99.99% on-time delivery rate and quick response to urgent orders through stocked materials.
Our robust manufacturing and supply chain enable us to offer competitive prices, helping clients expand their market reach.
Our expert engineers offer design, CAD, and technical support, while our trained sales team ensures fast, efficient 24-hour responses.
“We’re literally satisfied with Beyond Fluid’ always on-time delivery and exceptional handling of requests. Their commitment to timely service is evident and consistently reliable. Their swift response and guaranteed on-time delivery make them my preferred choice.”
“We can always count on Beyond Fluid’s quality. During a 2018 visit, their advanced facilities and stringent quality controls made a lasting impression on us. Their timely responses to requests for drawings or technical support further solidify my trust. We really love to place our orders to those suppliers like Beyond Fluid.”
Here are a few real most popluar questions from our clients.
Yes, Beyond Fluid's proportional relief valves are fully compatible with other big brands, like Swagelok and can be easily integrated into existing systems, offering customers flexibility and ease of use.
Sure, we provide OEM services for several leading global brands in instrumentation valve and fittings, significantly reducing their production costs and helping them gain greater market share.
Our instrumentation proportional relief valves follow strict quality control protocols and meet industry-leading standards, ensuring consistent performance and dependable reliability.
If you receive defective products, no worries! We offer a customer-friendly policy: we’ll either send a free replacement or issue a credit right away. We're committed to making things right for you.
Sure, we can provide samples of instrumentation valves or fittings for evaluation firstly. Besides, we have the capaiblity to manufacture according to specific requirements.
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