DIASTAR TenPlus Diaphragm valve FC PP-H

  Datasheet (PDF)

The Georg Fischer PROGEF Standard DIASTAR TenPlus pneumatic diaphragm valve is engineered for demanding industrial flow control and chemical process automation. Operating in Fail Safe to Close (FC) mode, this normally closed valve is powered by a preloaded galvanised steel spring assembly inside a rugged glass-fibre reinforced polypropylene (PPGF) housing. The valve body is precision-moulded from beta-PP-H (isotactic polypropylene homopolymer) with SDR11 metric butt fusion spigots, supporting standard butt fusion and non-contact infrared (IR) welding in high-integrity piping systems.

Featuring an innovative flow-optimised internal profile, the DIASTAR TenPlus minimises dead space and turbulence, delivering up to double the flow volume of earlier generation diaphragm valves. This hydraulic contour ensures high Kv values and linear flow characteristics for precise throttling or on/off isolation. Rated for a bidirectional working pressure of up to 10 bar at 20 degrees Celsius, the valve maintains bubble-tight shut-off in both flow directions. High-performance diaphragm membranes in EPDM and PTFE/EPDM ensure long service life and exceptional chemical compatibility.

Routine maintenance and installation are streamlined by the central union nut design, which replaces conventional multi-bolt bonnets. This engineering solution provides uniform circular compression onto the diaphragm, eliminating local stress peaks and doing away with the need for periodic bolt retorquing under temperature cycles. The PPGF actuator integrates a high-visibility optical position indicator for immediate visual monitoring, while the pilot air port rotates in 90 degrees increments to simplify pneumatic hose connections in tight valve manifolds.

Designed for a 25-year service life in water treatment, chemical distribution, and industrial process plants, this valve complies fully with ISO hydrostatic standards. BigWeld supplies authentic Georg Fischer piping solutions across Europe, providing reliable flow control for engineers and industrial piping installers.