PP-H Pneumatic Diaphragm Valve DIASTAR TenPlus FC d20-63

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The Georg Fischer PROGEF Standard DIASTAR TenPlus FC pneumatic diaphragm valve is engineered for fine flow regulation and bubble-tight bi-directional shut-off in pressurized industrial piping systems. Featuring a beta-PP-H (polypropylene homopolymer) body with metric true union socket fusion ends, this valve is designed for conveying aggressive chemical fluids, demineralised water, and industrial wastewater. Designed for an operational life of 25 years with water at 20 degrees Celsius, the PROGEF DIASTAR TenPlus valve delivers dependable linear control and long-term mechanical strength across demanding process installations.

The pneumatic actuator operates in Fail Safe to Close (FC) mode, utilizing a preloaded galvanised steel spring pack to close the valve automatically upon loss of pilot air pressure. The housing, moulded from glass-fibre reinforced polypropylene (PP-GF), provides outstanding resistance to atmospheric corrosion without requiring supplementary protective coatings. The pneumatic pilot air connection indexes in 90 degrees increments, streamlining air line routing in tight technical spaces. An integrated optical position indicator on the actuator dome clearly displays the open or closed status during visual inspections.

The internal body geometry prevents sediment accumulation and minimizes operating pressure drop. The true union design with socket fusion ends facilitates rapid pipeline dismounting without disturbing adjoining pipe spools. A heavy-duty central union nut secures the actuator directly to the valve body, completely eliminating exposed metallic screws and external corrosion risks. The valve provides a nominal working pressure rating up to 10 bar at 20 degrees Celsius across both flow directions, operating with EPDM, FKM, or PTFE/EPDM diaphragms selected according to chemical compatibility requirements.