Becker · U 4.20

U 4.20

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Oil-Lubricated Rotary VaneOEM data

Image: Becker

Pumping speed: 20.4 m³/h
Max. vacuum: 1.33 mbar
Motor power: 0.746 kW
Noise level: 67 dB(A)

Headline ratings converted to common units for comparison; the table below shows each figure exactly as published.

Technical data

Source: Becker product page · retrieved 2026-10-01

As published	US; SCFM	US	US; dB(A)	US; without Motor
Open Flow SCFM Pumping speed	12 SCFM oem source Source · 2026-10-01
Maximum Vacuum Max. vacuum		1 Torr Torr oem source Source · 2026-10-01
Horsepower Motor power		1 hp oem source Source · 2026-10-01
Noise Level dB(A) Noise level			67 dB(A) oem source Source · 2026-10-01
Weight without Motor Weight				44 lbs lbs oem source Source · 2026-10-01

Original extracted values are shown with their source and review status. Multiple values under the same condition remain separate for review.

Explore the parts

U 4.20, pulled apart

This model’s parts, by where they sit

Our drawing of the machine type, with the U 4.20's own parts from Becker's lists. Side view along the shaft. Oil-free (dry) pumps have no exhaust box oil, sight glass or oil filter; their exhaust filter is a dust filter.

Reviewed operating performance · 60 Hz

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Documents

View Data Sheet (U 4.20)datasheet · 2 pp
View Operating Manual (U 4.20)manual · 6 pp
View Maintenance Guide (U 4.40)other · 16 pp
Download Spare Parts List (U 4.20)parts-list · 8 pp

Documents open on the manufacturer’s site.

Service parts · 51

Kit1

Vanes (Kit) 215 003300 10700 NOZZLE90058300003

Filtration2

Seals and gaskets1

Dichtung / Gasket / Joint / Guarnizione / Junta94802200000

Fittings and hardware22

Valves5

Housing and covers4

Cooling2

Rotating parts1

Rotor 21102000140300

Lubrication1

OIL SIGHT GLASS90730200000

Motor and drive1

SOCKET HEAD SCREW /5 Special design - motor94531900000

Piston and diaphragm parts1

SOCKET HEAD SCREW - DIN4762 M6x75 1) 2) 3) 4)94537100000

Other parts10

Part numbers from Becker’s parts lists, shop and instruction manuals. Open a part for its other models, replacements and suppliers.

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Parts diagrams

Exploded views from Becker’s own documents, with each position and part number as printed. Select a part to see what it fits, who sells it and what replaces it.

Exploded view · Download Spare Parts List (U 4.20), page 751 positions · own page

Click a part or its number. Drag to move, pinch or Ctrl + scroll to zoom. Arrows step through positions in the manufacturer's numbering (not an assembly sequence). The manufacturer's drawing shows the parts already pulled apart and gives no assembled positions; Vac & Air does not invent them. Positions were placed automatically from the manufacturer's numbering.

Select a part on the drawing or in the list to see its number, what it fits and where to get it. Turn on “select several” to build one quote for many parts.

Select several

Pos.	Part number	Description	Qty
	00010040300	Pump Body 210 916800 10000 COVER
	02000140300	Rotor 211
	90058300003	Vanes (Kit) 215 003300 10700 NOZZLE
	00070040300	Lid 216 912300 00000 CONNECTING SCREW
	94537100000	SOCKET HEAD SCREW - DIN4762 M6x75 1) 2) 3) 4)
	94537600000	SOCKET HEAD SCREW 301 947700 10000 woodruff key
	94762800000	STRAIGHT PIN 303 948801 00000 eye bolt
	94580500000	THREADED PIN
	94691700000	STUD
	94850700000	SPRING WASHER
	94710500000	SECHSKANTMUTTER 57 947105 00000 HEX.NUT
	90180700000	Screw
	94920300000	ZAHNSCHEIBE 18 949203 00000 TOOTHED SPRING WASHER
	01680005000	CLAMPING DISC 16 016800 16300 CLAMPING DISC
	53750026200	Valve
	96541300000	Oil separating element (1x)
	94561800000	THREADED PIN
	91287100000	VERSCHLUSSSCHRAUBE / LOCKING SCREW / BOUCHON / VITE DI CHIUSURA / TORNILLO DE CIERRE
	72750399628	BLOW-OFF VALVE
	94562000000	THREADED PIN
	86780099559	FLOAT
	00500140300	Sieve
	50370140300	Cover
	94531900000	SOCKET HEAD SCREW /5 Special design - motor
	94532000000	INNENSECHSKANTSCHRAUBE 19 945320 00000 SOCKET HEAD SCREW
	00500040300	Sieve
	94822700000	Seeger-lockring
	53750118900	NON RETURN VALVE
	06810040300	Stütze / Support pillar / Support intermediaire / Supporto / Apoyo
	94562300000	THREADED PIN
	94130500000	RUBBER BUFFER
	01680240300	clamping disc
	95312500000	NOZZLE
	94840200000	HOHLSCHRAUBE / HOLLOW SCREW / VIS CREUSE / VITE ESAGONALE / TORNILLO HUECO
	92150050000	HANDLE
	96020140300	cooler
	56870199683	Gasballastventil, komplett / Gas ballast valve / l’este d’air / valvola di zavoratrice /
	51200040300	Leitung / Pipe / Tuyau / Condotto / Conducto
	94802200000	Dichtung / Gasket / Joint / Guarnizione / Junta
	91230000000	CONNECTING SCREW
	00940019000	HOLLOW HOLDING SCREW
	94800200000	Aluring / ALUMINIUM RING / BAGUE ALU / ANNELLO ALLUMINIO / ANILLO DE ALUMINIO
	74000101000	Filter / Filtre / Filtro
	96020440300	Kühler / COOLER / REFROIDISSEUR / RAFFREDDATORE / REFRIGERADOR
	01220140300	Leitung / Pipe / Tuyau / Condotto / Conducto
	01220240300	Leitung / Pipe / Tuyau / Condotto / Conducto
	53751018900	Rückschlagventil / NON-RETURN-VALVE / SOUPAPE ANTI-RETOUR / VALVOLA NON RITORNO / VÁLVULA ANTIRRETORNO
	00240040300	HOUSING FOR OIL SEPARATION
	90730200000	OIL SIGHT GLASS
	95122100100	VERSCHLUSS-SCHRAUBE / LOCKING SCREW / BOUCHON / VITE DI CHIUSURA / TORNILLO DE CIERRE
	91230600000	CONNECTING SCREW

Positions and part numbers as printed in Becker’s Download Spare Parts List (U 4.20), page 7 · view the source document