Cla-Val Pacific's 50-05 and 650-05 Pressure Relief, Air Release and Vacuum Breaker Valves are used to prevent surges during deep well pump start; and vacuum formation during pump shut-down operations. In operation, the valve is in the open position when the pump is started, discharging all of the air in the pump column and piping to atmosphere. As water begins to flow through the valve, the air release valve senses the change and closes, causing the main valve to close slowly through an adjustable restriction.
Product Advantages - Relieves air from the pump column on pump start-up
- Eliminates line surges caused by the starting of Deep Well Pumps
- Opens to relieve the vacuum formed in the pump column on pump shut-down
- Relieves excess pressure to atmosphere to prevent the pressure at the pump discharge from going to shut-off head
