AP Tech AP1810S 3PW MV4 FV4 1 Pressure Regulator

APTech AP1810S 3PW MV4 FV4 1 Pressure Regulator is a diaphragm-type process-gas regulator designed for ultra-high-purity service in semiconductor equipment and other clean-gas systems. Configured as a 3-port regulator (3PW), it uses FV4 (1/4-inch face-seal female) and MV4 (1/4-inch face-seal male) connections, enabling compact installation in gas-delivery racks and tool enclosures. Variants of the model appear in supplier catalogs as AP1810S-3PW-MV4-FV41, reflecting the same base valve with different port codes. In APTech documentation, FV4 denotes a 1/4-inch female face-seal port and MV4 denotes a 1/4-inch male face-seal port, supporting standard 1/4-inch process-gas tubing in downstream lines. Some marketplace listings describe a 316 stainless steel body for this family, offering corrosion resistance in demanding environments. The regulator's role is to provide controlled downstream pressure for regulated gas feeds in wafer fabrication processes and is commonly found in used semiconductor equipment inventories, highlighting its suitability for precise gas control in deposition and etching workflows. As a diaphragm regulator, the AP1810S delivers clean gas paths with a flexible membrane rather than a piston seal, a configuration well-suited to high-purity applications, and its compact form factor helps it fit into tight cleanroom layouts alongside APTech or compatible stage assemblies.