Data sheet ERHARD non slam nozzle check valve

ERHARD non slam nozzle check valve The innovative non-return valve for maximum economy An optimised flow cross-sectional area as well as a valve disc and valve stem gasket designed for minimum flow resistance ensure minimum head losses with the ERHARD non slam nozzle check valve. This enables highly economic operation especially in pumping stations. Valve disc, spring and closing travel have been engineered in such a way [2] that the ERHARD non slam nozzle check valve reacts that quickly even in highest flow delays (e. g. in a vertical line) that only minimal return flow velocities occur, with...

Brief specifications: • Valve disc (DN80-300): inc-free bronze / elastomer KTW / W270 z • Valve ring (DN350-600): .4404 / elastomer KTW / W270 1 • Internal body: zinc-free bronze • Guiding stem: tainless steel s • Guiding bush: igh-performance polymer h • Body: uctile cast iron d • Spring: tainless steel s • Protection outside: RHARD EKB fusion bonded epoxy E • Protection inside: RHARD vitreous enamel E Dimensions and weights Nominal size DN We need the following data for preparing a quotation: • Nominal size DN • Temperature range • Position of installation • Pressure rating PN • Flow velocities...

Diagrams valid for cavitation free operation. DN 100 PN 40, Zeta-value at 5 m / s: 0,63 Pressure loss [mbar] Pressure loss [mbar] Pressure loss [mbar] Pressure loss [mbar] Pressure loss [mbar] Pressure loss [mbar]

Diagrams valid for cavitation free operation. DN 350 PN 10 / 16 Pressure loss [mbar] Pressure loss [mbar] Pressure loss [mbar] Pressure loss [mbar] Pressure loss [mbar] Zeta-value with increasing speed Zeta-value with decreasing speed Pressure loss Dp

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