Direction Of Rotation; Orientation; Protection From Too High Pressures; Building Up The Pump Unit With Jaw Coupling - Danfoss APP Series Installation, Operation And Maintenance Manual

Operation guide
4. Building up the
pump unit with jaw
coupling
D
© Danfoss | 2023.03
Installation, Operation and Maintenance APP 53-92 pumps

3.4 Direction of rotation

Is indicated by an arrow engraved in the flange
of the pump.

3.5 Orientation

APP 53-92 can be mounted/orientated in steps of
45 degrees. Please see Data sheet 521B1340.

3.6 Protection from too high pressures

The pump should be protected against too high
pressure by means of a safety valve or a pressure
relief valve.
The valve outlet must not be connected directly to the pump suction line.
It must be connected directly to the drain.
Outlet
3-5 mm
0.12-0.20 inch

4.1 Mounting

1. Mount the coupling flush with the pump
shaft end or maximum 1 mm offset from
the pump shaft end. Ensure an air gap
between coupling parts of 3-5 mm (0.12-0.2
inch).
2. Mount the bell housing on pump. Secure
nuts with the right torque.
3. Measure the longest distance "A" from top
of bell housing to the button of coupling
claw.
The opening characteristics of the valve must not
result in peak pressures higher than 100 barg
(1450 psig).
The valve should be placed as close to the pump
as possible.
We recommend to install flexible soft hoses both
in the inlet and outlet lines.
Outlet
Inlet
IMPORTANT
When using jaw coupling it is critiacal
that the recommended measure-
ments are kept.
A: Elastic coupling
B: Bell housing
C: Motor shaft
D: Pump flange
4. Mount the coupling on motor shaft. Ensure
the coupling and motor flange are not in
contact with each other.
5. Measure from motor flange to the top of
the coupling. That measurement "B" shall
be 3-5 mm (0.12-0.2 inch) shorter than the
measurement "A".
("A" and "B" can be found on the next
page).
180R9346 | AQ240486503020en-001702 | 49
Inlet