Pneumatic Diaphragm Valve PP-H PN10 DIASTAR Ten DA d20-63

  Datasheet (PDF)

The Georg Fischer PROGEF Standard DIASTAR Ten DA is a pneumatically actuated diaphragm valve built for throttling and isolation duties in automated industrial fluid networks. The body is moulded from isotactic beta-nucleated polypropylene homopolymer (beta-PP-H) and is rated for working pressures up to 10 bar (PN10) across metric diameters d20 to d63 mm (DN15 to DN50). Face-to-face dimensions follow EN 558 and the assembly is built to EN ISO 16138, so the valve drops into existing process layouts handling aggressive chemicals, demineralised water and industrial effluents.

The actuator housing is glass-fibre reinforced polypropylene (PPGF), a corrosion-resistant choice for humid and chemically loaded plant rooms. In double-acting mode the actuator uses control air for both the opening and the closing stroke, giving precise stem positioning and balanced actuating forces. An integrated optical position indicator shows valve status at a glance, and the control air port rotates through 90 degrees to simplify pneumatic tubing routing on compact skids. The central union nut assembly replaces external metal bolts, so nothing corrodes on the outside of the valve and the diaphragm is clamped evenly around its full circumference.

Beta-nucleated PP-H gives the body high impact strength, thermal stability and broad resistance to acids, alkalis and inorganic salts, with the range dimensioned for a 25-year service life in industrial distribution systems. The optimised internal flow path delivers high flow coefficients with minimal pressure loss, while the metric socket fusion spigots create a homogeneous, permanent joint into SDR 11 piping using standard socket fusion equipment.

As an authorised Georg Fischer distributor, BigWeld supplies the DIASTAR Ten DA series with EPDM or PTFE/EPDM diaphragms for chemical manufacturing, municipal and industrial water treatment and process cooling installations.