U 4.250

Becker U 4.250 – outdated model

Becker no longer lists the U 4.250 in its current range: its documents are in the archive of the Becker download centre, and the Becker product range catalogue 01/2026 lists only the U 4.400 and the U 4.630 in the U 4 series. Becker names no successor. In the Ehrler & Beck range, it lies between the Becker U 5.201 (200 m³/h at 50 Hz) and the Becker U 5.301 (300 m³/h); both reach an ultimate pressure of 0.1 mbar.

Technical data

According to the Becker data sheet of 02.07.2014, the U 4.250 delivers 244 m³/h at 50 Hz and 276 m³/h at 60 Hz (tolerance ±5 %); the ultimate pressure is 3 mbar (SA/K) or 0.5 mbar (F/K) absolute. The three-phase motor has a power of 7.5 kW at 50 Hz and 9.0 kW at 60 Hz (efficiency class IE3). Sound pressure level 73 / 76 dB(A) at 50 / 60 Hz. The pump weighs 110 kg without motor; the motor weighs 55 (UL/CSA motor: 71) kg. Overall length with motor 1097 or 1088 mm, width 531 mm, height 355 mm. Suction connection G 2", exhaust connection G 1 1/2"; oil filling 7 l (Becker Lube M 100, S 100 or SL 100). A non-return valve and a PT100 temperature sensor are built in.

Order numbers

Becker assigned a separate order number to each combination of version and motor (pump with motor):

Versions

Becker listed the versions U 4.250 GB with gas ballast valve, U 4.250-25 with oil-water cooler, U 4.250-51 with oil bath heater, level sensor and thermostat, and U 4.250 (FV 250) with inlet filter FV 250. For pumps in service, Ehrler & Beck supports you with service and with the selection of a current model.

Pumping speed 50Hz	244
Pumping speed 60Hz	276
Ultimate pressure	0.5
Rated motor power 50Hz	7.5
Rated motor power 60Hz	9
Motor efficiency class	IE3
Length	109.7
Width	53.1
Height	35.5
Inlet connection flange	G 2"
Outlet connection flange	G 1 1/2"
Noise level	73 dB(A)
Cooling method	Air cooling