Product Overview
The Swagelok SS-4R3A is a precision proportional relief valve engineered for accurate, adjustable overpressure protection in high-purity and general industrial fluid and pneumatic systems. Manufactured by Swagelok, a global benchmark in instrumentation-grade fluid system components, this valve operates on a direct spring-loaded poppet principle in which the relief set point is established by compressing a calibrated spring against the poppet. As system pressure rises, the poppet lifts proportionally off its seat, modulating flow to vent excess pressure and re-seating automatically once pressure falls below the set point. The SS-4R3A serves as a critical safety and pressure-control element in analyzer systems, sampling panels, pilot plants, and hydraulic power units where dependable, repeatable cracking pressure and leak-tight reseal are mandatory.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Proportional Relief Valve (Hydraulic / Process & Pneumatic Valve) |
| Model Designation | SS-4R3A |
| Body Material | 316 Stainless Steel (SS prefix designation) |
| End Connection | 1/4 in. Swagelok Tube Fitting (4 designation) |
| Operating Pressure | Standard Industrial Grade (adjustable relief range up to rated bar) |
| Adjustment Method | Threaded adjusting cap with calibrated spring preload |
| Mounting & Connection | Standard ISO / Manufacturer Interface (panel or inline mounting) |
| Sealing Principle | Spring-loaded poppet with proportional lift and automatic reseat |
Engineering Features & Advantages
- Precision Performance: The calibrated spring and poppet design deliver accurate, repeatable cracking pressure and smooth proportional flow modulation, minimizing system pressure spikes and protecting downstream instrumentation.
- Leak-Tight Reseal: Precision-machined poppet and seat geometry ensures reliable bubble-tight shutoff after relief, reducing media loss and maintaining system integrity.
- Corrosion-Resistant Construction: 316 stainless steel wetted parts provide excellent resistance to aggressive media, making the valve suitable for corrosive fluid and gas service.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with stable performance across repeated pressure cycles.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original OEM Swagelok SS-4R3A standards for drop-in service and maintenance.
Typical Industrial Applications
The Swagelok SS-4R3A proportional relief valve is widely deployed in analytical instrumentation and sampling systems, pilot and process plants, hydraulic power units and test stands, and pneumatic control panels. It is also commonly specified in chemical and petrochemical processing, oil and gas instrumentation skids, and semiconductor or high-purity gas delivery systems where precise overpressure
PRODUCT IMAGES
SWAGELOK SS-4R3A Proportional Relief Valve
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- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine SWAGELOK SS-4R3A Regulator Valve. This US-made hydraulic component features a precise pressure-reducing design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.