11
The pump must operate with the axis of the pistons horizontal in order to ensure that all
its moving parts are properly lubricated.
The pump-motor assembly must be securely fastened to a sufficiently large and strong
base.
All the electrical connections must be made by specialized technicians.
If the motor is directly coupled, make sure that:
–
The drive shaft is perfectly aligned with the pump shaft.
–
The steady pin is of the prescribed length.
–
The connection coupling is the right size.
If a reduction gear is used, the recommendations given in the previous point also apply
with reference to the coupling between drive shaft – output shaft and layshaft - pump
shaft.
4.3 V-belt transmission
The pump can be controlled by a system of V-belts or timing belts.
Minimum diameter of driven pulley (on pump shaft)):
≥ 250 mm.
The radial load on the shaft must not exceed 7500 N.
Consult technical manuals or contact the
“Bertolini Technical Service”
if the sizing is
different.
If pulleys are used for coupling, check that:
–
There is no play between shafts and pulleys.
–
The pulleys are parallel and aligned.
–
The belts are pre-tensioned to the correct value. Excessively tight belts will lead to
early wear on the bearings.
4.4 Hydraulic connections
The body of CHX series pumps features two 3/4” GAS inlets and four 1/2” GAS outlets,
2 of which can be used for a pressure gauge and safety valve. There is also a union for
connecting the drainage outlet of the cooling circuit to a zero-pressure vessel or to the
suction circuit, so as to re-circulate the fluid.
COOLING CIRCUIT
DRAINAGE
Summary of Contents for 74.1030.97.3
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