Welch Vacuum 8925 Direct Drive Rotary Vane Pump - Manual (Page 13)

13
* Partial measurement based upon the American Vacuum Society Test Procedure No. AVS 5.1-1963
using a trapped McLeod Gauge.
SPECIFICATION 8907 8912 8917
Free Air Displacement
CFM (L/min) @ 60Hz 2.6 (70) 3.8 (108) 6.1 (173)
(L/min) m3h @ 50Hz (56) 3.68 (86) 5.37 (138) 8.63
Normal Pumping Speed
CFM (L/min) @ 60Hz 2.3 (64) 3.4 (96) 5.3 (150)
(L/min) m3h @ 50Hz (53) 3.2 (80) 4.78 (125) 7.51
Guaranteed Ultimate Pressure* Torr 1 x 10 -4 1 x 10 -4 1 x 10 -4
Water Vapor Tolerance (capacity), Torr 19 12 12
Water Vapor Tolerance (capacity), g/hr - - -
Sound Level dBA 50 50 50
Motor/Pump Speed
RPM @ 60Hz 1725 1725 1725
RPM @ 50Hz 1425 1425 1425
Motor Voltage 50/60Hz Single Phase
Current 115V (230V) @ 60Hz 4.6A (2.3A) 4.6A (2.3A) 4.6A (2.3A)
Current 230V @ 50Hz 2.1A 2.1A 2.1A
Motor Horsepower 1/2 1/2 1/2
Oil Capacity , quarts (liters) 1.0 (0.95) 0.9 (0.86) 0.8 (0.76)
Unibarb for Unibarb for Unibarb for
7/16" and 13/16" 7/16" and 13/16" 7/16" and 13/16"
Intake Connection I.D. Hose, I.D. Hose, I.D. Hose,
Threaded for Threaded for Threaded for
1-1/8"-20 1-1/8"-20 1-1/8"-20
Tubing needed, I.D.
in inches 7/16 or 13/16 7/16 or 13/16 7/16 or 13/16
in mm 11 or 20 11 or 20 11 or 20
Exhaust Connection 1"-20 Thread 1"-20 Thread 1"-20 Thread
Gas Ballast Connection 10-32 Thread 10-32 Thread 10-32 Thread
Pump Weight
lbs. 40 41 48
Kg. 18 18 22
Overall Dimensions
Length (inch / cm) 18.8 / 47.7 18.8 / 47.7 18.8 / 47.7
Width (inch / cm) 6.5 / 16.6 6.5 / 16.6 6.5 / 16.6
Height (inch / cm) 9.6 / 24.4 9.6 / 24.4 9.6 / 24.4
Shipping Weight
lbs. 46 46 53
Kg. 21 21 24
Shipping Carton Dimensions
Length (inch / cm) 28.9 / 73.5 28.9 / 73.5 28.9 / 73.5
Width (inch / cm) 10.8 / 27.5 10.8 / 27.5 10.8 / 27.5
Height (inch / cm) 13.7 / 35.0 13.7 / 35.0 13.7 / 35.0
Exhaust Filter (Optional) Cat. No. 1416C / 1417P-7 1416C / 1417P-7 1416C / 1417P-7
Oil Type Cat. No. 8995P / 8995G 8995P / 8995G 8995P / 8995G