Ventilating valve Type 595 socket fusion PP-H PN10

  Datasheet (PDF)

The Georg Fischer PROGEF Standard ventilating valve Type 595 is engineered specifically for reliable air intake in industrial thermoplastic piping networks. Designed to protect piping systems, tanks, and process equipment from negative pressure and vacuum collapse during drainage, emptying, or rapid pump shutdowns, this aerating valve responds quickly when internal pressure drops below atmospheric levels. Manufactured from high-grade polypropylene homopolymer (beta-PP-H), the valve exhibits outstanding chemical resistance, high rigidity, and excellent stress crack resistance, making it an ideal choice for industrial water treatment, chemical dosing lines, and wastewater treatment installations.

Operating reliably at a nominal pressure rating of PN10 (10 bar at 20 degrees Celsius), the PROGEF Type 595 features a highly sensitive opening threshold calibrated between 10 and 80 mbar. The internal mechanism relies on a durable stainless steel spring encapsulated with a protective HALAR fluoropolymer coating, preventing chemical corrosion caused by aggressive media or harsh ambient fumes. Sealing integrity is maintained across demanding operating conditions through precision-moulded elastomeric gaskets available in EPDM or FKM. The exterior assembly includes a rugged protective cap made of glass-fibre-reinforced polypropylene (PP-GF) or POM, safeguarding the internal breather components against dirt, debris, and atmospheric contamination.

Featuring metric socket fusion spigot ends compatible with standard PP-H fittings from d16 up to d110 (DN10 to DN100), the valve provides homogeneous, leak-tight joints through heat fusion. Its compact design facilitates radial installation and removal without disassembling adjacent piping sections, drastically reducing system downtime during scheduled inspections and routine maintenance. Designed for an operational service life of up to 25 years at 20 degrees Celsius, the PROGEF Type 595 ventilating valve ensures continuous process integrity in demanding industrial chemical and utility environments.