Plast-O-Matic RVDT Series Polypropylene Relief Valve for Ultra-Pure Water & Concentrated Etchants | 5-100 psi Pressure Range | 1/4" NPT Female | Ideal for Semiconductor, Pharmaceutical & Chemical Processing

Series RVDT in-line pressure relief valves feature a wetted flat PTFE diaphragm to resist both chemical attack and salt crystallization problems. A large active diaphragm area provides for smooth, chatter-free operation. Maximum inlet pressure 150 psi. One valve design functions as a relief valve, by-pass valve, back-pressure valve and anti-siphon valve. PTFE diaphragm - no wetted metal or elastomeric parts. Unique PTFE diaphragm is excellent for use with highly aggressive liquids and also provides the ultimate in contamination-free sealing. Rugged thermoplastic construction is ideal for a broad range of industrial applications. Large diaphragm area delivers more sensitivity and less pressure drop under flow conditions. Patented Fail-Dry safety feature provides visual warning of seal malfunction and permits the valve to continue operation until a scheduled maintenance can be planned. Non-leaching feature of PTFE makes it ideal for use with ultra-pure water and concentrated etchants, as in the semiconductor industry. Made of Polypropylene.