23
|
46
Pump Components—Drive Side with PA-Transmission
Feature
Feature
Description
Description
1 Lift point
This provides access for a lift or hoist to position the pump assembly into the install location.
2 External pressure relief valve
This pressure relief valve is set to open at approximately 650 psi (45 bar) at the factory. When open, the valve flows about
100 gpm (379 l/min), and resets when the pressure reduces to approximately 580 psi (40 bar).
Alternatively, you can choose to substitute the external pressure-relief valve with one with the same specifications as the
valve supplied by Waterous, or employ a speed-governor system that limits the pump speed to 3450 rpm when the
high-pressure discharge is enabled.
Note:
The discharge plumbing for the
external
high-pressure relief must be directed away from people to avoid injury and
equipment to avoid damage. It is the responsibility of the installer to make sure that a high-pressure control system
for the high-pressure discharge is installed and operating properly before the pump is placed into service.
3 Thermal relief valve
This opens when circulating water reaches a predetermined temperature, allowing cooler water to replace it.
4 Oil-fill cap
This is where oil is added to the pedestal.
5 Cooling line
This circulates water from the pump to cool the oil in the transmission.
6 Transmission
This provides an increase in the drive-line speed that is required by some applications—PA-transmission shown.
7 Plate cooler
This cools the oil during operation.
