Piston Pumps
LEYBOLD ROTARY PISTON PUMPS:
Leybold Rotary Piston Pumps are available in 5 compact models designed for dependable performance and long operation life. There are the single stage E series models: E75, E150, and E250; and then theres the two stage DK series models: DK-100 and DK-200. The DK series operates on the same principle as the E series, but uses pistons to achieve lower ultimate pressures. Leybold Rotary Piston Pumps are equipped with a gas ballast valve, which permits limited amounts of air to enter the compression chamber, hence inhibiting the compression vapors without incurring the generally deleterious results that can occur when condensate becomes mixed with the pump oil.
E SERIES:
| TECHNCIAL DATA | Value | E75 | E150 | E250 |
|---|---|---|---|---|
|
Displacement
|
CFM
|
50
|
100
|
171
|
|
Ultimate Partial Pressure, Without
Gas-Ballast Valve aproximately
|
Torr
|
2 x 10-2
|
2 x 10-2
|
2 x 10-2
|
|
Ultimate Total Pressure, With
Gas-Ballast Valve aproximately
|
Torr
|
2 x 10-1
|
2 x 10-1
|
2 x 10-1
|
|
Water Vapor Tolerance
|
Torr
|
45
|
45
|
45
|
|
Gas Ballast Flow
|
CFM
|
2.0
|
5.3
|
5.3
|
|
Oil Capacity- Pump Plus Gear Housing
|
qt
|
2.9
|
5.7
|
8.9
|
|
Motor (T.E. F.C. 60Hz)
|
hp
|
3
|
5
|
7.5
|
|
Rotational Speed of Pump
|
rpm
|
540
|
540
|
540
|
|
Nominal Rotational Speed of Motor
|
rpm
|
1800
|
1800
|
1800
|
|
Weight
|
lb
|
380
|
580
|
830
|
|
Intake Flange
|
|
KF50
|
3-inch ANSI
|
3-inch ANSI
|
|
Exhaust Flange
|
|
KF50
|
KF-50
|
3-inch ANSI
|
DK SERIES
| TECHNICAL DATA | Value | DK-100 | DK-200 |
|---|---|---|---|
|
Displacement
|
CFM
|
68
|
132
|
|
Compression Ratio Between Stages
|
|
2:1
|
4:1
|
|
Ultimate Partial Pressure, Without
Gas-Ballast Valve, Approximately
|
Torr
|
1 x 10-4
|
1 x 10-4
|
|
Ultimate Total Pressure, With
Gas-Ballast Valve, Approximately
|
Torr
|
2 x 10-3
|
2 x 10-3
|
|
Water Vapor Tolerance
|
Torr
|
20
|
20
|
|
Maximum Gas Ballast Flow
|
CFM
|
2.95
|
3.53
|
|
Oil Capacity- Pump Plus Gear Housing
|
qt
|
2.5
|
4.6
|
|
Motor (T.E. F.C. 60Hz)
|
hp
|
5
|
7.5
|
|
Rotational Speed of Pump
|
rpm
|
540
|
540
|
|
Nominal Rotational Speed of Motor
|
rpm
|
1800
|
1800
|
|
Weight
|
lb
|
560
|
830
|
|
Intake Flange
|
|
3-inch ANSI
|
3-inch ANSI
|
|
Exhaust Flange
|
|
KF50
|
3-inch ANSI
|
