Pipe-Lok Vales & Fittings Company delivers precision-engineered instrumentation fittings and valves trusted for reliability, safety, and performance in industrial applications with a strong focus on engineering excellence and quality control.
Designed for economical corrosion resistance in low to moderate pressure chemical and water treatment systems. PP pressure relief valves are used for acids, alkalis and aqueous media where lightweight non-metallic construction is preferred.
High-Performance Flow & Safety Instrumentation Solutions
Polypropylene is a lightweight thermoplastic with good resistance to many acids, alkalis and aqueous chemical solutions.
| Element | Weight Percentage (%) |
|---|---|
| Base Polymer | Polypropylene |
| Water Absorption | Very low |
| Chemical Resistance | Good for many acids and alkalis |
| Service Nature | Non-metallic thermoplastic |
| Typical Color | Natural / grey as supplied |
| Metal Content | None in base polymer |
*Composition limits are indicative for the listed grade family; applicable product specifications may vary depending on valve component and product form.
PP offers useful stiffness, low density and chemical resistance for non-metallic pressure relief valve applications.
| Property | Typical / Minimum Value |
|---|---|
| Tensile Strength | 25 - 35 MPa typical |
| Elongation | 50 - 200% typical |
| Hardness | Approx. 70 - 85 Shore D |
| Density | Approx. 0.90 g/cm3 |
| Temperature Capability | Up to approx. 90 deg C depending on design |
*Mechanical requirements depend on product form, heat treatment and applicable ASTM/ASME specification. Confirm final values against the material specification used for the pressure relief valve component.
High-performance material specifications for our complete Pressure Relief Valve range.
Designed for demanding pressure systems where material compatibility, corrosion resistance and reliable pressure protection are essential.
Used in dosing, filtration and chemical treatment systems.
Suitable for many acids, alkalis and aqueous solutions.
Used in corrosive wet process and rinse systems.
Applicable for lightweight non-metallic pressure protection.
Used in low to moderate pressure chemical utility services.
Suitable for selected wastewater and neutralization systems.
Pipe-Lok Vales & Fittings manufactures high-quality alternatives to the following standard industry part numbers
| Swagelok Part No. | Pipe-Lok Vales & Fittings Equivalent | Availability |
|---|---|---|
| SS-4R3A | Available | Ready to Ship |
| SS-4R3A1 | Available | Ready to Ship |
| SS-4R3A5 | Available | Ready to Ship |
| SS-4R3A5-BU | Available | Ready to Ship |
| SS-4R3A5-EP | Available | Ready to Ship |
| SS-4R3A5-KZ | Available | Ready to Ship |
| SS-4R3A5-NE | Available | Ready to Ship |
| SS-4R3A5-RT | Available | Ready to Ship |
| SS-4R3A-BU | Available | Ready to Ship |
| SS-4R3A-EP | Available | Ready to Ship |
| SS-4R3A-KZ | Available | Ready to Ship |
| SS-6R3A-MM | Available | Ready to Ship |
| SS-8R3A-MM | Available | Ready to Ship |
| SS-R4M8F8 | Available | Ready to Ship |
| SS-R4M8S8 | Available | Ready to Ship |
| SS-R4S8 | Available | Ready to Ship |
| SS-R4S12MM | Available | Ready to Ship |
| SS-RL3M4-F4 | Available | Ready to Ship |
| SS-RL3M4F4-RT | Available | Ready to Ship |
| SS-RL3M4-S4 | Available | Ready to Ship |
| SS-RL3S4 | Available | Ready to Ship |
| SS-RL3S4-SC11 | Available | Ready to Ship |
| SS-RL3S4-EP | Available | Ready to Ship |
| SS-RL3S4-MO | Available | Ready to Ship |
| SS-RL3S4-KZ-11002 | Available | Ready to Ship |
| SS-RL3S6MM | Available | Ready to Ship |
| SS-RL3S8MM | Available | Ready to Ship |
| SS-RL4M8F8 | Available | Ready to Ship |
| SS-RL4MR8 | Available | Ready to Ship |
| SS-RL4S8 | Available | Ready to Ship |
| SS-RL4S12MM | Available | Ready to Ship |