VT 4.25 Motor 41624427275 1Ph 230 V 50/60 Hz

The Becker VT 4.25 is a dry-running rotary vane vacuum pump with a pumping speed of 25 m³/h at 50 Hz (30 m³/h at 60 Hz) and a vacuum down to 150 mbar absolute. It works oil-free, is air-cooled and comes with inlet filter and vacuum regulating valve already fitted. Ehrler & Beck advises on selection, accessories and service.

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Pumping speed 25 m³/h 50 Hz 30 m³/h 60 Hz
Ultimate pressure 150 mbar
Rated motor power 0.8 kW 50 Hz 1 kW 60 Hz

Available variants
Motor variant	Motor order number
3Ph 400 V 50 Hz / 230/460, 208, 400 V 60 Hz, UL/CSA	41784407275114IL
3Ph 200/350 V 50 Hz / 220/380–400, 200/350 V 60 Hz, UL/CSA	41684453275114IL
3Ph 190–255/330–440 V 50 Hz / 190–290/330–500 V 60 Hz, IP55	41614498275003CY
3Ph 190–255/330–440 V 50 Hz / 190–290/330–500 V 60 Hz, IP54	41614498275
1Ph 230 V 50/60 Hz (selected)	41624427275

Becker VT 4.25 – oil-free rotary vane vacuum pump for rough vacuum

The VT 4.25 delivers 25 m³/h at 50 Hz and 30 m³/h at 60 Hz and reaches a vacuum of 150 mbar absolute. The installed motor power is 0.75–0.8 kW at 50 Hz and 0.9–1.0 kW at 60 Hz (depending on the motor). The sound pressure level is 62 dB(A) (50 Hz) or 67 dB(A) (60 Hz), the weight with motor approx. 26–29 kg, depending on the motor. Dimensions 494 × 260–270 × 299 mm (L × W × H), suction connection G 3/4".

Dry-running rotary vane principle

The pump is designed for continuous operation in the rough vacuum range. Its self-lubricating vanes run without oil – there is no oil change, and the conveyed air stays free of oil. This makes the VT 4.25 a solution for applications that require a clean environment. The operating point can be set with the integrated vacuum regulating valve.

Design and equipment

The motor drives the rotor directly via the motor shaft – this keeps the pump compact and makes installation easier. The robust design is intended for long running times even under demanding conditions, and maintenance can be carried out on site.

Large integrated inlet filter
Combined vacuum regulating and safety valve
Noise-optimised blow-off valve
Base with vibration dampers

Versions and accessories

VX 4.25: X series: same size with low-wear special vanes, 100 mbar absolute
External inlet filter: accessory, on request
Acoustic hood SH 19: accessory, on request
Further combinations: on request

Advice and service

Ehrler & Beck supports you in selecting the right size, supplies accessories and spare parts and carries out maintenance and repair.

Pumping speed 50Hz	25
Pumping speed 60Hz	30
Ultimate pressure	150
Rated motor power 50Hz	0.8
Rated motor power 60Hz	1
Weight	29
Length	49.4
Width	27
Height	29.9
Inlet connection flange	G 3/4"
Noise level	62 dB(A)
Cooling method	Air cooling
Oil type	Oil-free

Convert units: vacuum and pressure units · Nm³/h to m³/h

Further technical data

Motor	Data
Motor order number	41624427275
Pump types according to Becker	VT/VX 4.25 \| DT/DX 4.25/0-80 \| T/X 4.25 DV
Phases	1~ (single-phase)
50 Hz	0.80 kW (1.1 hp) · 230 V · 1350 min⁻¹ · 6.4 A
60 Hz	1.00 kW (1.3 hp) · 230 V · 1600 min⁻¹ · 7.2 A
Version	CE IP54 • ISO F • PTO
Motor data according to	Becker Motor Specifications for Pumps and Blowers (09/2026), item 2-12

Additional technical data

Technical data	Value
Design	Rotary vane vacuum pump, dry-running (oil-free), air-cooled
Pumping speed 50 Hz / 60 Hz	25 / 30 m³/h
Vacuum (absolute)	150 mbar
Installed motor power 50 Hz / 60 Hz	0.75–0.8 / 0.9–1.0 kW
Sound pressure level 50 Hz / 60 Hz	62 / 67 dB(A) (DIN EN ISO 3744, 1 m)
Weight with motor	approx. 26–29 kg (depending on the motor)
Dimensions L × W × H	494 × 260–270 × 299 mm (with eye bolt; housing 253 mm)
Suction connection	G 3/4"
Reference data	1000 mbar, 20 °C, tolerance ±5 %

Product name	Part number
Carbon vane kit	901349 00007
Filter element	909505 00000
Blow-off valve	727502 06000
Contact pressure spring	009000 16300
Bolt (index C, D)	029600 16400
Insulation pad (index C, D)	741300 27601
Sealing ring	948021 00000
Gasket	008900 16500
Spacer tube (index B)	068002 16500
Spacer	068000 27600
Spacer (index B)	068000 27500
Filter cover (index B)	004803 27600
Filter cover (index C, D)	004804 27600
Front hood (index C, D)	006832 27600
Foot	015100 27600
Foot (variant 1~ motor)	015101 27600
Foot (variant 1~ motor)	515101 27600
Housing	000101 16400
Housing (variant /0-06, without filter)	000100 16400
Unit hood (index B)	006802 27600
Unit hood (index B)	006805 27500
Unit hood (index C, D)	006831 27500
Rubber spacer (index C, D)	968104 00000
Rubber moulded part	951920 00000
Rubber moulded part	951921 00000
Rubber moulded part	951922 00000
Rubber washer (index B)	741300 27600
Hood (variant 1~ motor)	906806 27500
Hood 1~ (variant /0-06, without filter; index B)	006808 27500
Hood 3~ (variant /0-06, without filter; index B)	006809 27500
Hex socket screw	945320 00000
Hex socket screw	945328 00000
Hex socket screw	945373 00000
Socket head screw (index C, D)	945318 00000
Socket head screw (index C, D)	945319 00000
Cable (variant 1~ motor)	742002 30000
Cable grommet (index B)	951906 00000
Edge protection	964110 00000
Rotor	020000 16400
O-ring	913161 00000
Key	947713 00000
Eye bolt (index B)	548800 16300
Eye bolt (index C, D)	948806 00000
Side cover	000710 16500
Side cover (variant /0-06, without filter)	000707 16500
Tension sleeve	952009 00000
Tension disc	016800 16500
Star tolerance ring	911012 00000
Washer	949451 00000
Washer	949454 00000
Vacuum regulating valve	736001 99613
Fan with hub	502301 16400
Valve poppet (index B)	833903 99597
Shaft end screw	901804 00000
Toothed lock washer	949203 00000

Version / accessory	Description
VX 4.25	X series: same size with low-wear special vanes, 100 mbar absolute
External inlet filter	Accessory, on request
Sound enclosure SH 19	Accessory, on request
Further combinations	on request