PP-H Pneumatic Ball Valve Type 546 Pro FO

  Datasheet (PDF)

The Georg Fischer PROGEF Standard PP-H Type 546 Pro pneumatic ball valve provides automated flow isolation configured for fail-safe-to-open (FO) operation in chemical processing, industrial utilities, and water treatment systems. Manufactured from beta-polypropylene homopolymer (beta-PP-H) with serrated metric fixed flanges, this valve is engineered for demanding industrial environments requiring robust chemical resistance, full bore flow, and process safety.

Technical specifications

The Type 546 Pro fail-safe-to-open assembly combines a single-acting pneumatic actuator with a high-integrity industrial valve mechanism. Driven by a 5.6 bar NAMUR pilot interface, internal spring packs automatically rotate the ball to the fully open position upon air pressure failure to prevent overpressure in critical systems.

• Actuator operation: Single-acting pneumatic actuator configured for fail-safe-to-open (FO) spring return service.
• Operating speed: Rapid 90-degree actuation cycle completed within 1 to 2 seconds.
• Control interface: Standardised NAMUR interface (VDI/VDE 3845) operating at 5.6 bar nominal control pressure.
• Pressure rating: Nominal operating pressure rated at 10 bar (PN10).
• Safety stem design: Integrated predetermined breaking point in the valve stem to prevent internal component damage from torque overloads.
• Dimensional range: Available for pipeline diameters from d20 mm to d63 mm (DN15 to DN50).

Materials and standards

Constructed entirely from industrial-grade thermoplastics, this assembly offers superior chemical compatibility and mechanical longevity. The body is moulded from isotactic beta-PP-H, featuring PTFE ball seats backed by elastomeric compensation rings in EPDM or FKM to maintain bubble-tight sealing.

All units undergo factory leak testing in accordance with ISO 9393-2 and EN 12266 leak rate A requirements. The actuator housing is manufactured from flame-retardant glass-fibre reinforced polypropylene (PP-GF) with stainless steel threaded inserts. The beta-PP-H piping components comply with pressure-bearing standards and are designed for a 25-year operational service life with water at 20 degrees Celsius.

Applications

This fail-safe-to-open pneumatic ball valve is engineered for process piping systems where uninterrupted flow or line depressurisation is mandatory during power or pneumatic supply failure. It is widely specified in aggressive chemical handling, industrial effluent systems, semiconductor manufacturing, and municipal or industrial water treatment facilities.

BigWeld supplies the Georg Fischer PROGEF Standard Type 546 Pro series across Europe as an authorised Georg Fischer distributor, providing engineers and plant installers with verified technical documentation and sizing support.