Varisco S.p.A.
Z.I. Nord - Terza Strada, 9 - 35129 PADOVA – ITALY
Tel.+39.049.8294111 Email: [email protected]
Fax+39.049.8076762 Web: www.variscospa.com
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8.4 LUBRICATION
8.4.1 IN GENERAL
The Nova Rotors progressing cavity pump is supplied with lubricant for about 3250 working hours.
In case of replacement of parts involving lubrication, it is advisable to re-lubricate. To this purpose,
see the table below:
Universal joints: VN 2461 C
Chrome steel joints (Universal joint and Pin joint): Agip SM2 - Esso Beacon Q2
AISI stainless steel joints (Universal joint and Pin joint): Agip SM2 - Esso Beacon Q2
Bearings: Agip MU3
Rubber stators for food: Agip vaseline 1718
Steel Universal Joints
Molycote VN 2461 C
Chromed steel, universal joint and pin joint
Agip SM2 - Esso Beacon Q2
Stainless steel, universal and pin joints
Agip SM2 - Esso Beacon Q2
Bearings
Agip MU3
Food grade stators
Agip vaseline 1718
8.4.2 BEARINGS
The male shaft bearings are greased at NR. In case they were removed, their seat shall be filled with
grease according to the table above.
8.4.3 PROPELLER SHAFT JOINTS
Pin joints with sleeve are to be periodically lubricated.
Moreover, every time parts were replaced with original spare parts, their grease shall be replaced.
IMPORTANT: The pumps that uses sleeves over joints for food are supplied with food-compatible
grease.
8.4.4 MOTOR VARIATOR
See Service Manual
8.5 MALFUNCTIONING
Below you can find a synthetic table
Malfuntioning References:
A
The pump does not work
F
The pump stops
B
The pump does not intake G
Faulty stator
C
Wrong delivery
H
Faulty rotor
D
Uneven flow
I
The seal leaks
E
Noisy pump
J
Low delivery pressure
A B C D E F G H I J POSSIBLE
CAUSE
1
X
X
New stator and rotor are stuck together
2
X
X
Faulty electrical contact
3
X
X
X
X
X
Excessive delivery pressure
4
X
X
X
X
Unknown matter in the pump
5
X
X
X
X
X
High temperature, the stator squeezed
6
X
X
X
Stator of wrong material. Check the order
7
X
X
X
X
X
Product granulometry too high.
8
X
X
X
X
X
X
X
The product sediments when the pump is stopped
