Lined Safety Valve
PTFE / PFA-lined pressure safety and relief valves engineered for corrosive chemical and acid service — providing automatic overpressure protection without exposing metal to aggressive process media.
What Is a Lined Safety Valve?
Lined safety valves are spring-loaded pressure relief devices with a complete internal PTFE or PFA lining applied to all wetted parts — inlet nozzle, disc, body, and guide — preventing corrosion and media contamination in aggressive chemical services. When process pressure exceeds the set point, the valve opens automatically to vent excess pressure and reseats at a predetermined blowdown pressure. Critical for protecting vessels, reactors, heat exchangers, and pipelines handling HCl, H₂SO₄, HF, chlorine, and other corrosive media.
Key Features
- ✔️ Corrosion-Resistant Lining - PTFE/PFA lining protects against highly corrosive chemicals
- ✔️ Reliable Overpressure Protection - Automatically relieves excess pressure for enhanced system safety
- ✔️ Leak-Tight Sealing - Precision-engineered seat minimizes process leakage
- ✔️ Chemical Service Ready - Ideal for acids, alkalis, solvents, and aggressive process media
- ✔️ Long Service Life - Durable lined construction reduces maintenance and extends operational life
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Technical Specifications
| Parameter | Details |
|---|---|
| Size Range | 1/2"×1" to 4"×6" (DN15×DN25 to DN100×DN150) |
| Set Pressure Range | 0.5 bar to 40 bar (7.5 psi to 580 psi) |
| Temperature Range | -20°C to +180°C (PTFE / PFA Lining) |
| Lining Materials | PTFE, PFA, PVDF |
| Body Materials | Carbon Steel (WCB), Stainless Steel (CF8M), Ductile Iron |
| Inlet / Outlet | Flanged (ANSI 150# / 300#), Threaded (NPT / BSP) |
| Orifice Type | API Standard Orifices: D, E, F, G, H, J, K |
| Bonnet Type | Open / Closed / Bellows Sealed (for corrosive/toxic media) |
| Design Standards | API 526, ASME Sec. VIII Div.1, EN ISO 4126 |
| Testing Standards | API 527, ASME PTC 25 |
| Certifications | CE PED, ISO 9001:2015, ATEX (optional) |
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