Pressure retaining valve type 586 PVC-U d16-63mm

  Datasheet (PDF)

The Georg Fischer pressure retaining valve type 586 PVC-U is an engineered system component designed to maintain constant upstream operating pressure and protect piping installations from overpressure. Featuring metric union ends with solvent cement sockets for outer diameters from 16 mm to 63 mm, the valve incorporates a high-performance PTFE/EPDM diaphragm and integrated stainless steel mounting inserts. It delivers reliable pressure retention from 0.5 bar to 9.0 bar (7 psi to 130 psi).

Technical specifications

The type 586 valve operates as a direct-acting back pressure regulator to keep upstream line pressure stable under fluctuating flow rates. The assembly functions without an external power source, utilising a spring-loaded diaphragm mechanism to control relief and bypass flow reliably.

• Standard pressure setting range: 0.5 bar to 9.0 bar (7 psi to 130 psi)
• Alternative low-pressure range: 0.3 bar to 3.0 bar (4 psi to 44 psi) available on request
• Diaphragm configuration: chemical-grade PTFE facing backed by resilient EPDM
• Sealing options: high-grade EPDM or FKM internal O-rings
• Fastening: integrated M6 or M8 stainless steel mounting inserts for secure base support
• Instrumentation options: optional integrated manometer available on request

Materials and standards

Constructed entirely from industrial-grade unplasticised polyvinyl chloride, the valve body provides robust mechanical strength and outstanding chemical resistance against corrosive media. All internal wetted components conform to strict ISO metric dimensional standards for industrial thermoplastic pressure systems.

The composite diaphragm combines the universal chemical resistance of PTFE with the elastic recovery of EPDM. Integrated metallic inserts eliminate tensile stresses in the plastic housing during rigid anchoring to mounting brackets, ensuring durable service in chemical dosing, water processing, and industrial manufacturing plants.

Installation and jointing

Installation into metric pipework is performed using true-union ends with solvent cement sockets according to metric piping standards. The three-piece union design allows radial installation and fast removal from the pipeline without disturbing adjacent pipe runs.

Joints are assembled using solvent cement and primer compatible with rigid PVC-U systems. For accurate setup, technicians adjust the setpoint via the top adjustment mechanism, with the option to install a pressure gauge directly into the valve body to verify calibration.