Section 03 - Specifications; Specification Chart - Welch 8905 Owner's Manual

3.01 Specification Chart

SPECIFICATION
Free Air Displacement
CFM (L/min) @ 60Hz
(L/min) m3h @ 50Hz
Normal Pumping Speed
CFM (L/min) @ 60Hz
(L/min) m3h @ 50Hz
Guaranteed Ultimate Pressure* Torr
Water Vapor Tolerance (capacity), Torr
Water Vapor Tolerance (capacity), g/hr
Sound Level dBA
Motor/Pump Speed
RPM @ 60Hz
RPM @ 50Hz
Motor Voltage 50/60Hz Single Phase
Current 115V (230V) @ 60Hz
Current 230V @ 50Hz
Motor Horsepower
Oil Capacity , quarts (liters)
Intake Connection
Tubing needed, I.D.
in inches
in mm
Exhaust Connection
Gas Ballast Connection
Pump Weight
lbs.
Kg.
Overall Dimensions
Length (inch / cm)
Width (inch / cm)
Height (inch / cm)
Shipping Weight
lbs.
Kg.
Shipping Carton Dimensions
Length (inch / cm)
Width (inch / cm)
Height (inch / cm)
Exhaust Filter (Optional) Cat. No.
Oil Type Cat. No.
* Partial measurement based upon the American Vacuum Society Test Procedure No. AVS 5.1-1963
using a trapped McLeod Gauge.
Section 3: PUMP SPECIFICATIONS
8905
1.8 (52)
(43) 1.5
1.5 (43)
(36) 1.3
2 x 10
30
56
3450
2875
3.8A (1.9A)
1.2A
1/4
0.42 (0.4)
Unibarb for
3/16" and 7/16"
I.D. Hose,
Threaded for
3/4"-20
3/16 or 7/16
5 or 11
3/4"-20 Thread
10-32 Thread
24.5
11.1
14.5 / 36.8
5.1/ 13
8.4 / 21.3
26
11.8
21 / 53.3
6.5 / 16.5
11.2 / 28.6
1416B / 1417
8995P / 8995G
8920
7.7 (218)
(182) 10.8
7.4 (210)
(175) 10.5
-3
3 x 10
6 15
180
54
1725
1425
6.8A (3.4A)
3.4A
1/2
1.3 (1.2)
Unibarb for
9/16" and 13/16"
I.D. Hose,
Threaded for
1-1/8"-20
9/16 or 13/16
14 or 20
1"-20 Thread
10-32 Thread
58.5
26.6
20.8 / 52.8
7.1 / 17.9
11.0 / 27.9
71
32.2
29 / 73.7
10 / 25.4
14 / 35.6
1417P-10 / 1416C
8995P / 8995G
12
8925
11.3 (320)
(266) 16.0
10.0 (283)
(236) 14.2
-4 -4
4 x 10
15
180
55
1725
1425
10.0A (5.0A)
5.0A
3/4
1.2 (1.1)
Unibarb for
9/16" and 13/16"
I.D. Hose,
Threaded for
1-1/8"-20
9/16 or 13/16
14 or 20
1"-20 Thread
10-32 Thread
63
31.3
22.2 / 56.4
7.1 / 17.9
11.0 / 27.9
77
34.6
29 / 73.7
10 / 25.4
14 / 35.6
1417P-10 / 1416C
8995P / 8995G