Vacuum Pumps, Direct Drive High Vacuum Compact, Gem, Medium and Large
Overview
The Direct Drive High Vacuum Compact, Medium and Large vacuum pumps use a two stage rotary vane oil sealed technology. The Direct Drive High Vacuum Gem Model 8890 vacuum pump uses a two stage “rotating rotor within a rotor” or gerotor technology. These compact, portable pumps are recommended for many laboratory applications, including centrifugal concentrators, vacuum ovens, freeze dryers and transfer lines.
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 in the compact, medium and large models.
Model:
cfm, L/min
Torr
mbar
Compact 8905
1.8, 51
2×10-3
2.7×10-3
Gem 8890
1.1, 31
1×10-1
1.3×10-1
Medium 8907
2.6, 73
1×10-4
1.3×10-4
Medium 8912
3.8, 108
1×10-4
1.3×10-4
Medium 8917
6.1, 173
1×10-4
1.3×10-4
Large 8920
7.7, 218
3×10-4
4×10-4
Large 8925
11.3, 320
4×10-4
5.3×10-4
Features of the Direct Drive High Vacuum Pumps:
Compact, lightweight and portable
Quiet operation
Thermal overload protection
Oil anti-suckback mechanisms to keep pump isolated from system when motor stops
Compact, Medium and Large Direct Drive models use rotary vane and have gas ballast valves to inhibit vapors from condensing in pump
GEM Direct Drive uses gerorator technology and has the advantage of not overheating when run continuously at any pressure
Specifications (Click here):
Vacuum Pumps, Direct Drive High Vacuum Compact, Gem, Medium and Large
Specifications
Model:
Compact 8905
Gem 8890
Medium 8907
Medium 8912
Medium 8917
Free Air Displacement at 60 Hz: (cfm, L/min)
1.8, 51
1.1, 31
2.6, 73
3.8, 108
6.1, 173
Ultimate pressure: (Torr, mbar)
2×10-3, 2.7×10-3
1×10-1, 1.3×10-1
1×10-4, 1.3×10-4
1×10-4, 1.3×10-4
1×10-4, 1.3×10-4
Sound level: (dBA)
56
58
50
50
50
Motor, pump speed (rpm):
3450
3450
1725
1725
1725
Motor horsepower:
1/4
1/4
1/2
1/2
1/2
Oil capacity: (qt, L)
0.42, 0.4
0.48, 0.45
1.0, 0.95
0.99, 0.86
0.8, 0.76
Tubing needed, ID: (in, mm)
3/16 or 7/16, 5 or 11
3/8
7/16 or 13/16. 11 or 20
7/16 or 13/16. 11 or 20
7/16 or 13/16. 11 or 20
Intake connection:
Unibarb
3/8 hose barb
Unibarb
Unibarb
Unibarb
Exhaust connection:
Threaded 3/4-20
Threaded 3/4-20
Threaded 1-20
Threaded 1-20
Threaded 1-20
Dimensions: W×D×H (in, mm)
14.1×5.1×8.4, 359×130×213
14.5×5.1×18.4, 368×130×213
18.5×6.5×9.6, 471×165×243
6.8×13.8×8.8, 471×165×243
6.8×13.8×8.8, 471×165×243
Weight: (lbs, kg))
24.5, 11.1
24.5, 11.1
40, 18
40, 18
48, 22
Power: (V, Hz, Ph)
115, 60, 1
115, 60, 1
115, 60, 1
115, 60, 1
115, 60, 1
Specifications
Model:
Large 8920
Large 8925
Free Air Displacement at 60 Hz: (cfm, L/min)
7.7, 218
11.3, 320
Ultimate pressure: (Torr, mbar)
3×10-4, 4×10-4
4×10-4, 5.3×10-4
Sound level: (dBA)
54
55
Motor, pump speed (rpm):
1725
1725
Motor horsepower:
1/2
3/4
Oil capacity: (qt, L)
1.3, 1.2
1.2, 1.1
Tubing needed, ID: (in, mm)
9/16 or 13/16, 14 or 20
9/16 or 13/16, 14 or 20
Intake connection:
Unibarb
Unibarb
Exhaust connection:
Threaded 1-20
Threaded 1-20
Dimensions: W×D×H (in, mm)
20.5×7.1×10.7, 521×179×272
21.2×7.1×10.7, 538×179×272
Weight: (lbs, kg))
58.5, 26.6
69, 31.3
Power: (V, Hz, Ph)
115, 60, 1
115, 60, 1
Number
Description
Price $
8905A
Direct Drive Compact 8905 High Vacuum Pump, flow rate 1.8 cfm, 51 L/min, vacuum 2×10-3 Torr, 2.7×10-3 mbar, supplied with hose adapter and charge of vacuum pump oil, does not include exhaust filter
2,166.04
8890A
Direct Drive GEM 8890 High Vacuum Pump, flow rate 1.1 cfm, 31 L/min, vacuum 1×10-1 Torr, 1.3×10-1 mbar, supplied with exhaust filter 1417
2,166.04
8890A-75
Direct Drive GEM 8890 High Vacuum Pump Kit, flow rate 1.1 cfm, 31 L/min, vacuum 1×10-1 Torr, 1.3×10-1 mbar, supplied with tubing, gauge, Model 1421 vacuum regulator, Model 1416B exhaust mist eliminator, collection flask
2,475.21
8907A
Direct Drive Medium 8907 High Vacuum Pump, flow rate 2.6 cfm, 73 L/min, vacuum 1×10-4 Torr, 1.3×10-4 mbar, supplied with hose adapter and charge of vacuum pump oil, does not include exhaust filter
2,578.54
8912A
Direct Drive Medium 8912 High Vacuum Pump, flow rate 3.8 cfm, 108 L/min, vacuum 1×10-4 Torr, 1.3×10-4 mbar, supplied with hose adapter and charge of vacuum pump oil, does not include exhaust filter
2,887.71
8917A
Direct Drive Medium 8917 High Vacuum Pump, flow rate 6.1 cfm, 173 L/min, vacuum 1×10-4 Torr, 1.3×10-4 mbar, supplied with hose adapter and charge of vacuum pump oil, does not include exhaust filter
3,145.31
8920A
Direct Drive Large 8920 High Vacuum Pump, flow rate 7.7 cfm, 218 L/min, vacuum 3×10-4 Torr, 4×10-4 mbar, supplied with hose adapter and charge of vacuum pump oil, does not include exhaust filter
3,351.56
8925A
Direct Drive Large 8925 High Vacuum Pump, flow rate 11.3 cfm, 320 L/min, vacuum 4×10-4 Torr, 5.3×10-4 mbar, supplied with hose adapter and charge of vacuum pump oil, does not include exhaust filter
3,738.29
8995P-11
DirecTorr® Premium Vacuum Oil, low vapor pressure, no additives or inhibitors, higher viscosity formula for higher rpm and direct drive pumps, 1 liter, inquire about larger gallon and drum quantities
109.44
8995G-11
DirecTorr® Gold Vacuum Oil, exceptionally low vapor pressure, high stability in chemical environments, low back streaming, 1 liter, inquire about larger gallon and drum quantities
60.02
1421D
Vacuum Regulator used to control vacuum level between 6.3” Hg and 29.9” Hg, inlet accepts 1/4” ID vacuum hose, stainless steel
293.04
1421
Vacuum Regulator used to control vacuum level between 6.3” Hg and 29.9” Hg, inlet accepts 1/4” ID vacuum hose, for Direct Drive GEM 8890
224.86
1423B
Separator or liquid trap for use on inlet to inhibit injestion of liquid or particles by pump, or on exhaust to collect vapors expelled by the pump, accepts 1/4” ID vacuum hose
140.38
1430A
Hands free maintained on/off pump operation, no adaptors or special connection needed, plug directly into the power source outlet, 115V, 60HZ only
112.17
1430B
Hands free momentary on/off pump operation, no adaptors or special connection needed, plug directly into the power source outlet,115V, 60HZ
161.78
1430C
Hands free momentary on/off pump operation with IEC connections, no adaptors or special connection needed, plug directly between the IEC power outlet and supplied line cord, 90 – 230V
161.66
1417
Standard exhaust filter, screw in type, filters to 0.3 micron particle size, for Direct Drive Compact 8905, Direct Drive Gem 8890, DuoSeal 1399 and 1400 (included as standard with Gem 8890)
153.80
1417P-7
Standard exhaust filter, screw in type, filters to 0.3 micron particle size, for Direct Drive Medium 8907, Direct Drive Medium 8912 and Direct Drive Medium 8917
282.56
1417P-10
Standard exhaust filter, screw in type, filters to 0.3 micron particle size, for Direct Drive Large 8920, Direct Drive Large 8925, DuoSeal 1376, 1402 and 1405
360.44
1417P-20
Standard exhaust filter, screw in type, filters to 0.3 micron particle size, for DuoSeal 1397 and 1374
527.99
1417L
Replacement filter element for exhaust filter 1417
77.14
1417R
Replacement filter element for exhaust filter 1417-7
115.46
1417G
Replacement filter element for exhaust filter 1417P-10
144.40
1417H-01
Replacement filter element for exhaust filter 1417P-20
177.14
1417A
Directional exhaust filter, screw in type, 360° swivel outlet with tubing connector, for Direct Drive Medium 8907, Direct Drive Medium 8912, Direct Drive Medium 8917, Direct Drive Large 8920, Direct Drive Large 8925, DuoSeal 1376, 1402 and 1405
,
406.07
1417A-01
Gasket replacement exhaust filter 1417A
43.17
1417G
Element for exhaust filter 1417A
144.40
1417C-02
Directional exhaust filter, screw in type, 360° swivel outlet with tubing connector, for DuoSeal 1400
413.66
1417B
Directional exhaust filter, screw in type, 360° swivel outlet with tubing connector, for DuoSeal 1374 and 1397
621.44
1417C-01
Gasket replacement exhaust filter 1417C
43.07
1417H
Element for exhaust filter 1417B
200.86
1416B
Exhaust mist eliminator for Direct Drive Gem 8890, for applications in which conventional exhaust filters saturate, separates oil mist and returns oil to pump
Inquire
1416C-01
Exhaust mist eliminator for DuoSeal 1380, 1376, 1402, 1405, for applications in which conventional exhaust filters saturate, separates oil mist and returns oil to pump
589.18
1416C
Exhaust mist eliminator for Direct Drive Medium 8907, Direct Drive Medium 8912, Direct Drive Medium 8917, Direct Drive Large 8920 and Direct Drive Large 8925, for applications in which conventional exhaust filters saturate, separates oil mist and returns oil to pump
474.38
1416H
Exhaust mist eliminator for Direct Drive Compact 8905, for applications in which conventional exhaust filters saturate, separates oil mist and returns oil to pump
Inquire
1416D
Hermatically sealed oil mist eliminator, prevents vacuum pump gases from escaping into the lab environment, coalesces oil mist and allows it to drain back into pump, stainless steel, borosilicate microfiber element and fluoroelastomer gasket, exhaust port accepts 13/16 ID hose, needs adaptor kit for pump
765.55
1416E
Pump adaptor kit for 1416D oil mist eliminator
209.30
1417Y-05
Replacement element for 1416D oil mist eliminator
152.75
541922-NW16
Coaxial trap, ISO NW 16, reduces oil backstreaming, stainless steel, to 4 cfm or 140 L/min, 3.75 inches Ø, specify copper or stainless steel element
Inquire
541922-NW25
Liquid nitrogen or dry ice cold trap, removable 3 quart center well for dry ice and alcohol slurry, cold temperature up to 12 hours depending on vapor load, straight tube connections, 10 inches Ø, 7/16 inch OD tubing required
Inquire
1393J
Exhaust connectors to hose for Direct Drive Compact 8905, Direct Drive Gem 8890 and DuoSeal 1400
Inquire
1393K
Exhaust connectors to hose for Direct Drive Medium 8917, Direct Drive Large 8920, Direct Drive Large 8925, DuoSeal 1402 and 1405
70.88
1393F
Exhaust connectors to ISO flange for Direct Drive Compact 8905, Direct Drive Gem 8890 and DuoSeal 1400
46.11
1393G
Exhaust connectors to ISO flange for Direct Drive Medium 8917, Direct Drive Large 8920, Direct Drive Large 8925, DuoSeal 1402 and 1405
81.59
302201
ISO NW 16 aluminum hinged clamp for Direct Drive Compact 8905 and DuoSeal 1400
22.11
302202
ISO NW 25 aluminum hinged clamp for Direct Drive Medium 8907, Direct Drive Medium 8912, Direct Drive Medium 8917, Direct Drive Large 8920, Direct Drive Large 8925, DuoSeal 1402 and 1405
25.05
303101
ISO NW 16 centering rings, stainless steel with fluoroelastomer o-ring, for Direct Drive Compact 8905 and DuoSeal 1400
16.23
303102
ISO NW 25 centering rings, stainless steel with fluoroelastomer o-ring, for Direct Drive Large 8920, Direct Drive Large 8925, DuoSeal 1402 and 1405
24.96
8905K-06
Unibarb inlet connector for Direct Drive Compact 8905, hose ID 3/16 and 7/16 inch
80.36
8907K-06
Unibarb inlet connector for Direct Drive Medium 8907, Direct Drive Medium 8912 and Direct Drive Medium 8917, hose ID 7/16 and 13/16 inch
84.73
8920K-06
Unibarb inlet connector for Direct Drive Large 8920 and Direct Drive Large 8925, hose ID 9/16 and 13/16 inch
104.57
726021
Dial vacuum gauge for measuring vacuum level, brass, 2 inches diameter, 1/8 inch male NPT connection
42.49
726020
Dial vacuum gauge for measuring vacuum level, brass, 2.5 inches diameter, 1/4 inch male NPT connection
