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March 12, 2010


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Catalog :: All Categories :: Vials :: Scintillation Vials :: Direct-Drive High Vacuum Pumps, Welch*

Direct-Drive High Vacuum Pumps, Welch*

These compact, lightweight direct-driven, two-stage rotary vane high vacuum pumps range in free air displacement from 51 to 320L/min. with ultimate pressure to 1x10^-4torr. Pumps are portable and feature low noise levels. Use on freeze dryers, vacuum ovens, or concentrators, or for degassing. Built-in oil anti-suckback mechanism keeps the pump isolated from the rest of the vacuum system whenever the motor stops. A gas ballast valve inhibits vapors from condensing in the pump chamber. All pumps are thermal overload protected.
All 115V models are CSA certified. All 230V models are CE approved.

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Free Air

Ultimate

Tubing

Oil

Shipping

Displacement,

Pressure,

Needed, I.D.,

ISO

Capacity,

Dimensions,

Weight,

L/min. (cfm)

Torr

mm (in.)

Flange

L (qts.)

L x W x H, cm (in.)

Electrical

kg (lbs.)

Welch No.

VWR Catalog #

Unit

List Price

LabShop Price

Qty

Model 8905

51 (1.8)

2 x 10^-3

11.1 ( 7/16)

NW16

0.42 (0.4)

36.8 x 13 x 21.3 (14 x 5 x 8 13/32)

115V, 60Hz, 1Ph

11.1 (24.5)

8905A

54970-515

Each

~~$2,046.24~~

$2,046.24

Model 8907

70 (2.6)

1 x 10^-4

20.6 ( 13/16)

NW25

0.7 (0.73)

42.4 x 16.5 x 24.3 (16 23/32 x 6 1/2 x 9 19/32)

115V, 60Hz, 1Ph

18 (40)

8907A

55009-084

Each

~~$2,218.31~~

$2,063.03

62 (2.2)

1 x 10^-4

20.6 ( 13/16)

NW25

0.7 (0.73)

42.4 x 16.5 x 24.3 (16 23/32 x 6 1/2 x 9 19/32)

230V, 50Hz, 1Ph

18 (40)

8907C-02

54970-622

Each

~~$2,458.03~~

$2,322.84

Model 8912

108 (3.8)

1 x 10^-4

20.6 ( 13/16)

NW25

0.7 (0.73)

42.4 x 16.5 x 24.3 (16 23/32 x 6 1/2 x 9 19/32)

115V, 60Hz, 1Ph

18.6 (41)

8912A

55009-086

Each

~~$2,427.87~~

$2,257.92

90 (3.2)

1 x 10^-4

20.6 ( 13/16)

NW25

0.7 (0.73)

42.4 x 16.5 x 24.3 (16 23/32 x 6 1/2 x 9 19/32)

230V, 50Hz, 1Ph

18.6 (41)

8912C-02

54970-624

Each

~~$2,690.13~~

$2,542.17

Model 8917

173 (6.1)

1 x 10^-4

20.6 ( 13/16)

NW25

0.7 (0.73)

46.5 x 16.5 x 24.3 (18 13/32 x 6 1/2 x 9 19/32)

115V, 60Hz, 1Ph

21.8 (48)

8917A

55009-088

Each

~~$2,649.72~~

$2,464.24

143 (5.1)

1 x 10^-4

20.6 ( 13/16)

NW25

0.7 (0.73)

46.5 x 16.5 x 24.3 (18 13/32 x 6 1/2 x 9 19/32)

230V, 50Hz, 1Ph

21.8 (48)

8917C-02

54970-626

Each

~~$2,935.52~~

$2,774.07

Model 8920

218 (7.7)

3 x 10^-4

20.6 ( 13/16)

NW25

1.3 (1.4)

20.5 x 7.1 x 10.7 (52 3/32 x 17 29/32 x 27 19/32)

115V, 60Hz, 1Ph

26.6 (58.5)

8920A

54970-540

Each

~~$3,165.90~~

$3,165.90

Model 8925

320 (11.3)

3 x 10^-4

20.6 ( 13/16)

NW25

1.2 (1.25)

21.2 x 7.1 x 10.7 (52 13/16 x 17 29/32 x 27 19/32)

115V, 60Hz, 1Ph

31.3 (69)

8925A

55009-070

Each

~~$3,546.94~~

$3,546.94

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