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Model HMC-SR - Quick Relief Valve, To Avoid Water Hammer



This valve protects pumps and pipes from pump startup and shutoff pressure surges due to power failure. Pump off means valve normally closed. If pump starting cause pressure surge, the pilot smoothly opens the valve to limit pressure rising.

  • To eliminate pumping electric power failures surge causing abrupt variations on flow speed and pressure.

  • new shaft/diaphragm/seal disc assembly
  • fully center guided shaft
  • only one moving assembly (Shaft-Diaphragm-Seal disc) upstream and downstream ports on valve cover for an easy maintenance
  • easy assembly, compactness and disassembly
  • head loss and cavitation risks reduction
  • wide hydraulic profile
  • excellent corrosion and cavitation strenght
  • conformity with both European and American standards
  • multiple function covers
  • perfect seal
  • removable seat

  • water supply and distribution
  • fire protection systems
  • water treatment
  • high-rise buildings
  • fuel stock plants
  • water supply stations (airports, marine and fluvial ports)
  • sport centers (swimming pools, pleasure grounds)
  • pump stations

  • high hydrodynamic section globe body, without stagnation pockets
  • open pass 100% of nominal diameter
  • standard ductile cast iron casting
  • epoxy-polyester resin powder painting
  • entirely guided travel shaft/diaphragm/seal disc assembly
  • standard stainless steel seal seat with cavitation risks reduction, bronze on request
  • stainless steel bolts
  • brass shaft
  • stainless steel guide shaft
  • double neoprene, nylon reinforced diaphragm
  • NBR, nylon reinforced diaphragm
  • easy disassembly due to the new ports design on the valve cover
  • easy maintenance and access to internal parts without removing the valve from the pipeline
  • purchased valve function can easily be changed with simple pilot circuit modifications
  • shaft indicator

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