PFA-Lined Valves & Fittings

A PFA-lined valve or fitting puts the mechanical strength of 316L stainless steel and the chemical inertness of PFA into one part: the metal shell carries line stress and pressure, while the wetted surface is a continuous layer of high-purity PFA, so strong acids, caustics, solvents and ultrapure water only ever touch fluoropolymer. It solves two problems at once — metal valves corrode and shed metal ions, and all-plastic valves cannot take the temperature, pressure and piping loads.

The category covers 14 series: semiconductor-grade flanged diaphragm, ball and check valves and flanged fittings (HG/T 20592 flanges, dimensionally the same as EN 1092-1 PN16); Tri-Clamp diaphragm, tee, tank-bottom, sampling and ball valves designed to BPE, plus lined tees, elbows, reducers and sight glasses; and PFA-lined hoses, hose adapters, filter housings and vent breathers, vessels and agitators, and injection-moulded PFA fittings. Every series has a JIUNYUAN ordering code — pick the size, connection and actuation and you have an orderable part number.

Typical duty: chemical delivery in fab CDS (chemical distribution systems), ultrapure fluid lines in wet processing, wet lines in display and solar manufacturing, and corrosive service in pharmaceutical and fine-chemical plants. Most series are rated to +150 °C (ball valves +120 °C, hoses +100 °C) and from vacuum to 1.0 MPa at 20 °C. The PFA resin can be specified as an ultra-pure grade from a leading international supplier or as a cost-effective high-purity grade, with material certificates.