Product Overview
The Swagelok SS-RL4S8 is a precision-engineered proportional relief valve designed for accurate pressure control in demanding industrial fluid and pneumatic systems. Manufactured by Swagelok, a globally recognized leader in high-quality instrumentation and process components, this valve operates on a direct spring-loaded poise principle, allowing for smooth, proportional modulation of relief pressure in response to system demands. Unlike simple on/off relief valves, the SS-RL4S8 provides continuous, variable pressure regulation, making it ideal for applications requiring fine-tuned overpressure protection and stable system pressure maintenance. Its robust 316 stainless steel construction ensures excellent corrosion resistance and long-term durability in aggressive environments, while the compact, panel-mountable design facilitates easy integration into complex hydraulic and pneumatic circuits.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Proportional Relief Valve (Hydraulic / Pneumatic) |
| Model Designation | SS-RL4S8 |
| Operating Pressure | Up to 3000 psig (207 bar) – dependent on spring range and seat configuration |
| Mounting & Connection | 1/4 in. Swagelok tube fitting (SS-RL4S8), panel mountable |
| Body Material | 316 Stainless Steel |
| Seat & Seal Material | PCTFE / PTFE (standard); other options available |
| Flow Coefficient (Cv) | 0.08 (typical for 1/4 in. proportional relief valve) |
| Adjustment Mechanism | Knurled knob with locknut, proportional spring loading |
Engineering Features & Advantages
- Precision Proportional Control: The spring-loaded poppet design enables smooth, continuous adjustment of relief pressure, allowing for precise system tuning and stable overpressure protection without abrupt pressure spikes.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, the SS-RL4S8 features a robust 316 stainless steel body and high-quality internal components that resist wear, corrosion, and fatigue.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original Swagelok SS-RL4S8 specifications, ensuring drop-in replacement without modification to existing piping or mounting hardware.
- Leak-Tight Performance: Swagelok’s proven tube fitting technology and precision-machined seat provide reliable sealing, minimizing fugitive emissions and fluid loss.
- Versatile Compatibility: Suitable for use with a wide range of liquids and gases, including hydraulic oils, water, air, and inert gases, making it adaptable to diverse process and pneumatic applications.
Typical Industrial Applications
The Swagelok SS-RL4S8 proportional relief valve is commonly employed in hydraulic power units, pneumatic control panels, chemical injection systems, and analytical instrumentation where precise pressure relief and
PRODUCT IMAGES
SWAGELOK SS-RL4S8 Proportional Relief Valve
⚡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
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- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine SWAGELOK SS-RL4S8 Metering Valve. This US-made hydraulic component features a precise needle design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.