12 | VT 4.10, VT 4.16, VT 4.25, VT 4.40, VX 4.10, VX 4.16, VX 4.25, VX 4.40
4 PUMP DESCRIPTION
This chapter explains the assemblies and components of the pump and how they work.
The following information is intended to help you understand how the pump works. This information can help to
avoid dangers and errors due to incorrect operation.
4.1 GENERAL DESCRIPTION OF THE PUMP
The pump is a classic dry-running rotary vane vacuum pump.
It consists of a housing, the eccentrically installed rotor (2), the radially
moving vanes (3) and the inlet and outlet (4+6).
When the rotor turns, gas flows through the intake filter (5) into the
enlarging chamber (1) until it is shut off by the next slide valve. The
enclosed gas is then compressed until the relief valve (6) opens against
atmospheric pressure.
4.2 SIZES
Several pumps of different sizes are listed in these operating instructions because they
• work according to the same principle of action,
• have the same intended use,
• are subject to the same legal and normative requirements,
• have a similar construction,
• have similar physical characteristics
• and are also very similar in terms of maintenance/service/commissioning.
4.3 VARIANTS
4.3.1 VARIANTS VT 4.10-4.40
Within the VT 4.10-4.40 series, a distinction is made between 2 variants.
The VT 4.40/0-90 is a special version with a larger scoop chamber for more suction volume.
4.3.2 VARIANTS VX 4.10-4.40
Note on the series
Series X sliders are characterised by extremely long slider service lives.
Becker guarantees a slide valve service life of 20,000 operating hours or a maximum of 3 years for this pump.
X series intake filters have a removable cover (pre-filter) that extends the service life of the filter at
extended by regular cleaning.
Within the VX 4.10-4.40 series, a distinction is made between 2 variants.
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