VACUUBRAND · VACUUBRAND Rotary vane pumps

RE 2.5

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Oil-Lubricated Rotary VaneOEM data

*Photo shows the Rotary vane pumps series, not necessarily this exact model. Image: VACUUBRAND

Ultimate pressure: 0.3 mbar
Pumping speed: 2.3 m³/h

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

Technical data

Source: VACUUBRAND product page · retrieved 2026-10-06

As published	Value
Ultimate vacuum Ultimate pressure	3 x 10-1 mbar oem source Source · 2026-10-06
Pumping speed	2.3 m3/h oem source Source · 2026-10-06

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

Same family: RC 6, RE 6, RE 9, RZ 2.5, RZ 6, RZ 9

Explore the parts

RE 2.5, pulled apart

This model’s parts, by where they sit

Our drawing of the machine type, with the RE 2.5's own parts from VACUUBRAND'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

Rotary vane pumps ENbrochure
Instructions for repair: rotary vane pumps RE/RZ/RC 2/2.5/5/6/8/9/16drawing · 73 pp
Repair manual RC 6manual · 88 pp
Repair manual RE 2.5, RE 6, RZ 2.5, RZ 6manual · 84 pp
Repair manual RE 9, RZ 9manual · 88 pp

Documents open on the manufacturer’s site.

Service parts · 102

Kit2

Rotating parts14

Seals and gaskets11

Fittings and hardware15

Filtration5

Piston and diaphragm parts2

Valves9

Lubrication1

Oil separato r R 2.5 / R 6637171

Housing and covers11

Motor and drive9

Other parts23

Part numbers from VACUUBRAND’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 VACUUBRAND’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 · Instructions for repair: rotary vane pumps RE/RZ/RC 2/2.5/5/6/8/9/16, page 5933 positions

The positions on this drawing haven’t been placed yet: choose a position in the list for its part. Drag to move, pinch or Ctrl + scroll to zoom.

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
	638850	Shaft coupling for RC
	639463	Rubber fo o t with thread M 6x8
	3121066	Rubber foot with thread M6x18
	639125	Orifice 0.2mm
	637135	Ro to r fo r R 2.5 / R 6
	639016	Vane L50
	639779	Housing cover 1-cyl. C
	637025	Ro to r high vacuum stage RC 6
	637137	Rotor high vacuum stage RZ 6
	639780	Housing cover insert 1-cyl.
	638440	Inlet and outlet valve D24, PTFE 0.5
	639016	Vane L50
	639092	O-ring, 140mm x 3mm, FPM
	639188	Vane L20
	637343	Head cover chemistry diaphragm pump (large)
	638142	A bso rbent felt
	639016	Vane L50
	639092	O-ring, 140mm x 3mm, FPM
	637005	Motor for R 6, 230 V / 50-60 Hz
	637134	Screw M 4x25mm
	637775	Diaphragm clamping disc for chemistry diaphragm pumps, large
	638142	A bso rbent felt
	636787	Shaft coupling for R 2.5 / R 6
	637028	Diaphragm PTFE (large), quadratic hole
	637147	Shaft seal unit for R 2.5 / R 6, complete
	637171	Oil separato r R 2.5 / R 6
	636787	Shaft coupling for R 2.5 / R 6
	637147	Shaft seal unit for R 2.5 / R 6, complete
	637738	Diaphragm support disc 8.2mm, large
	644370	Valve spring
	636450	Oil no n-return valve plate
	637005	Motor for R 6, 230 V / 50-60 Hz
	638456	Shim 0.1mm
	639106	Fo am rubber insert
	638142	A bso rbent felt
	639106	Fo am rubber insert
	639223	Gas ballast cap
	639499	Eccentric unit, complete, 2-cyl.
	637161	Oil-pump vane R 2.5 / R 6
	639223	Gas ballast cap
	639572	Hose PTFE DN 10/8mm, length 184mm
	660000	Clamping ring, aluminum, KF DN 10/16
	638858	Bent hose PTFE DN 10/8mm
	639092	O-ring, 140mm x 3mm, FPM
	660000	Clamping ring, aluminum, KF DN 10/16
	660190	External centring ring KF DN 10/16, with sealing ring NBR
	638859	Bent hose PTFE DN 10/8mm
	639175	Small flange KF DN 16, suctio n side R2 - R6
	648723	Sieve unit (suctio n po rt) KF DN 16
	660190	External centring ring KF DN 10/16, with sealing ring NBR
	639175	Small flange KF DN 16, suctio n side R2 - R6
	639848	Tolerance ring 12x12mm
	648723	Sieve unit (suctio n po rt) KF DN 16
	637134	Screw M 4x25mm
	639175	Small flange KF DN 16, suctio n side R2 - R6
	644005	External centring ring KF DN 10/16, with sealing ring NB R
	637134	Screw M 4x25mm
	637171	Oil separato r R 2.5 / R 6
	644000	Clamping ring, aluminum, KF DN 10/16
	637171	Oil separato r R 2.5 / R 6
	639223	Gas ballast cap
	644370	Valve spring
	639106	Fo am rubber insert
	644370	Valve spring
	644384	Valve seat sea
	636450	Oil no n-return valve plate
	640309	Orifice 0.25mm
	644384	Valve seat sea
	636377	Oil no n-return valve plunger
	637161	Oil-pump vane R 2.5 / R 6
	639188	Vane L20
	636450	Oil no n-return valve plate
	637172	Cross coupling
	639097	Catch po t, plastic, small
	636025	Oil non-return valve plunger
	637161	Oil-pump vane R 2.5 / R 6
	636303	Oil non-return valve spring
	637172	Cross coupling
	640187	Filter fo r o il mist separato r, ceramic, fo r RC
	636024	Oil non-return valve housing
	636025	Oil non-return valve plunger
	636997	Shaft seal unit fo r RC 6, co mplete
	636303	Oil non-return valve spring
	638836	Inlet and o utlet valve D24, FFKM
	636024	Oil non-return valve housing
	636447	Oil no n-return valve spring
	639572	Hose PTFE DN 10/8mm, length 184mm
	638857	Ho se P TFE DN 10/8mm, length 83mm
	638859	Bent hose PTFE DN 10/8mm
	639572	Hose PTFE DN 10/8mm, length 184mm
	636452	Splash pro tectio n
	636376	Oil no n-return valve ho using

Positions and part numbers as printed in VACUUBRAND’s Instructions for repair: rotary vane pumps RE/RZ/RC 2/2.5/5/6/8/9/16, page 59 · view the source document