Voith IPV Series - Voith Internal Gear Pumps in Operation; Operating Data

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Voith Turbo H + L Hydraulic GmbH & Co. KG 25000057510-TED-ENX-04
11 Voith internal gear pumps in
operation
This section describes indications of pump wear, and the measures necessary to x
them.
11.1 Operating data
Protectthepumpsduringoperationbyeffectivelylteringthepressureuid
to prevent any foreign bodies entering the system (see chapter 17.8)!
11.1.1 Factorsthatinuencethelossofpressurein
the suction piping during operation
If the input pressure falls below the pressure specied in chapter 5.2, check the
following points:
• the ow speed in the suction piping (speed changes) the suction height (level
difference changes between the oil level and pump),
• the suction lter (increased lter contamination),
• the oil viscosity (oil temperature changes),
• the suction cross-section (if necessary, the suction valve opening, and whether
the valve was fully open).
11.1.2 Suction pressure
During operation with mineral oil, the input pressure in the suction nozzle of the
pump must be between 0.8 and 3 bar (measured as the absolute pressure).
During start-up mode, an absolute pressure of up to 0.6 bar is permitted temporarily.
In the suction piping, the ow speed of 1 m/s (in suction mode) or 1.5 m/s (inlet with
slight over-pressure of up to 3 bar max.) must not be exceeded! Risk of cavitation!
The ow speed is only intended as a reference guide. The key factor is the suction
pressure!
Internal gear pumps
Operation
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