Vacless Systems Inc SVRS | Center Port Position | SVRS-30
The anti entrapment safety function is achieved by allowing ambient air to rapidly fill the pump suction side, in the event of a high vacuum occurrence, causing it to loose prime providing for the quick release of an entrapment.
Electronic pump shut-off with center or offset port installation, limit switch, and control box with 5-10V DC power supply and time delay relays for Suction Lift or Submerged Suction installations.
The winterization function is achieved by simply removing the SVRS until all of the water in the pump is fully drained.
Vacless Electrical Breathers provide immediate vacuum relief upon entrapment by allowing atmospheric air to rapidly fill the pump pot while simultaneously turning off the pump. Electrical units include a three minute time delay restart and audible alert.
The pump starts and runs the normal filtration cycle using 110VAC, 220VAC or 3 PH power supply. After 15 seconds, utilizing a delay relay, a 5-10V DC circuit becomes energized. Upon entrapment, the vacuum level inside the pot is elevated creating a differential pressure across the seal. Atmospheric air pushes the seal compressing a spring until the O-Ring crosses grooves that allow atmospheric air to rapidly fill the pot making the pump loose prime quickly freeing the entrapment. The entire travel of seal occurs within milliseconds causing the shoulder to strike a pin plunger of a snap acting normally closed electrical switch to the open position. The plunger will spring back momentarily to normal operating condition. As the plunger is depressed, the 28V DC control circuit becomes open and causes a normally closed switch to open and turn the pump off. To prevent false shutdown of the pump during start-up surges the 5-10V DC control circuit is equipped with a delay relay. This relay is responsible for postponing the energizing of the 5-10V DC transformer and precludes switching off the pump even if the plunger is depressed.
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