Vacuum Pump

Welch model

1400N

1402N

1376N

1374N

Free Air Displacement

CFM

0.9

5.6

10.6

23

L/min

25

160

300

650

Ultimate Pressure (Torr)

1 x 10^-4

1 x 10^-4

1 x 10^-4

1 x 10^-4

Gas Ballast

Yes

Yes

Yes

Yes

Pump RPM

580

525

525

510

Motor Horsepower

1/3

1/2

1

1-1/2

Oil Capacity,qt.(liters)

0.62(0.59)

2.25(2.1)

2.5(2.37)

1.25(1.2)

Tubing Needed,I.D. in.

7/16

13/16

13/16

1-5/8

ISO Exhaust & Intake Flange

NW 16

NW 25

NW 25

NW 40

Dimessions

L x W x H in.(cm)

17.8x9x12.6

(45.2x22.9x32)

19.3x14.1x15.4

(49x35.3x39.1)

19.3x12.3x15.6

(49x31.2x39.6)

26x13.7x18.8

(66x34.8x47.6)

Weight, lbs (kg)

58(26)

112(51)

156(71)

220(100)

Ship Weight, lbs (kg)

68(31)

128(58)

177(81)

231(105)

Shipping Carton Dimensions

L x W x H in. (cm)

20.6x13.8x14.4

(52.3x35x36.5)

22.6x15x18.3

(57.5x38x46.5)

23.4x17.7x18.9

(59.5x45x48)

27.8x16.2x20.9

(70.6x41.2x53)