Product Details
- RotationR.H.
- Gallons Per Hour (GPH)7.0 GPH
- Max Pressure (PSI)100 PSI
- RPM1725 RPM
Description
The A1YA 7912 model has a unique circuit that exhibits a dependable cut-off, a high
single pipe lift capacity and automatic two pipe purging.
The pump circuit contains a positive displacement involute gear set and two controlling valves.
The fuel from the gear set flows across the cone valve causing a pressure differential
sufficient to overcome the spring force of the diaphragm valve. This causes the
diaphragm valve to close and the fuel is then routed to the piston chamber. When
the level of this flow causes the piston chamber pressure to rise above that of the
opposing spring force, the piston opens and flow passes through the nozzle. The
piston spring is adjusted such that a given nozzle pressure can be maintained while
any resulting excess fuel is metered through the seal chamber and then back to the
inlet on single pipe, and the tank on two pipe installation.
Cut-off speed is regulated by adjusting the cone valve to a level which gives the
necessary pressure drop to open the diaphragm valve. This in turn reduces the piston
chamber pressure and the piston shuts off the nozzle.