pressure vacuum relief valve sizing

...Vacuum Relief Valve Model Number:Air & Vacuum Relief Valve Material:Plastic Product name:Drip Irrigation System Usage:Farm Garden Agriculture Size:1/2'' Max working pressure:150 psi Sealing Pressure:5-6 psi Air outtake flow:0-50cubic meter per hour@0-6psi Air intake flow:from 6 to 0 psi Garden Irrigation Dual Acting Continuous Air Vacuum Relief Valve features: How to work? Air Vacuum Relief

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... bronze Plug head Aluminum bronze plug Aluminum bronze+rubber piston SST bonnet Copper alloy item size H H M 1/2” 47 113 1/2”

...relief valve Threaded NPT, BSPT, flanged or Tri-clover SPECIFICATION Product Name 900 Series Safety relief valve Threaded NPT, BSPT, flanged or Tri-clover size 15-50mm Brand KUNKLE Model 900 SERIES Connections Threaded NPT, BSPT, flanged or Tri-clover Temperature range -320° to 800°F (-195° to 427°C) Pressure range 3 to 1400 psig (0.2 to 96.5 barg) Vacuum...

1.Basic information: Item Name Air relief valve Material Plastic Standard NPT,BSP Pressure Normal Pressure Temperature Normal Temperature Packing Color Box SIZE 3/4",1",2" Delivery port Ningbo by sea 2.Advantages: Advanced aerodynamic design Big inlet size...

...pressure 0.7 MPa Max temprtature 　 100 C Net Size 1350*2150 MM E-heater 380V/6kW*4 pcs T/P Valve max 6bar,120 C inclusive Vaccum valve 　 inclusive Temp Gauge DN15 Pressure Gauge DN15 Return Water Inlet DN25 vacuum relief valve DN20 Circulation Water Inlet DN65 Circulation Water