The valve body and disc surface are fully lined with imported PTFE material, offering excellent chemical inertness against acids, alkalis, solvents and other aggressive media. It also provides a very low coefficient of friction and excellent anti-stick properties, making it suitable for viscous or crystallizing fluids. The compact wafer design allows direct installation between pipe flanges, saving space – particularly ideal for retrofit projects or confined areas. The disc features a quick-closing design, effectively reducing water hammer impact and protecting downstream equipment.

Manufactured in strict compliance with ISO 9001 and PED requirements, the valve body is precision-cast in carbon steel WCB, and the PTFE lining is firmly bonded through a high-temperature sintering process to ensure no peeling or blistering over long-term service. Every valve undergoes 100% shell strength and seat leakage tests before shipment, accompanied by traceable material certificates and lining thickness inspection reports. The series covers sizes DN50 to DN300, pressure ratings PN10/PN16, and a temperature range of -20°C to 180°C, compatible with ANSI, DIN and other flange standards.

Currently, Lipin Valve’s PTFE-lined check valves have been installed in multiple chemical plants and pharmaceutical intermediate production lines in China, delivering responsive operation and reliable sealing, with extended maintenance intervals. The company also offers customized lining thickness and special connection configurations, and can supply matching counter-flanges and fasteners upon request. For technical data and selection assistance, please contact our sales team.