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  • EDWARDS

BOC EDWARDS QDP40 & QDP-80 DRY PUMPS 

   The QDP pumps operate at pressures between atmospheric and ultimate vacuum with no lubricating or sealing fluid in the pumping chamber. This ensures a clean pumping system

without back-migration of oil into the system being evacuated. QDP pumps have enclosed, water-cooled motors and are therefore suitable for applications in clean environments where
fan cooling is unacceptable. The QDP pumps are each fitted with a gas system, exhaust-silencer and check-valve. The pump is fixed to the framework by vibration isolators. The framework has castors and leveling feet. The QDP pumps are four-stage, positive displacement rotary pumps in which pairs of  intermeshing rotors (of different profiles mounted on common shafts) are held in correct phase relation by a pair of timing-gears. The timing-gears and the adjacent double-row angular contact ball-bearings, are oil lubricated. The pump shafts and rotors are made from cast-iron. The internal and external shaft-seals on the motor drive-shaft are made of polytetrafluoroethylene (PTFE). Bearings are located on the high vacuum end of the shaft, near to the pump-inlet. These bearings are packed with perfluoropolyether (PFPE) grease.
 
 
TECHNICAL DATA 
VALUE
QDP40 
 QDP80
Mass
KG 
172
202
Motor Rating
kW 
2.2
4 / 6
Warm up Time 
MINUTES 
15
15
Inlet Connections
ISO 
40
63
Outlet Connections 
NW 
40
40
Vacuum System Maximim Leak Rate 
 mbar.ls-1
1 x 10-5
1 x 10-5
Exhuast System Maximm Leak Rate
 mbar.ls-1
1 x 10-5
1 x 10-5
Ambient Operating Temp Range 
 Celcius 
5 to 40
5 to 40
Maximum Ambient Operationg Humidity 
RH 
90%
90%
Protection Degree
- 
IP44
IP44
Pressure Level (at 1 meter) 
 dB(A)
< 70
< 70 
 
 
 
BOC EDWARDS IQDP-40 & IQDP-80 DRY PUMPS
 
   The IQDP pump is a four-stage, positive displacement rotary pump in which pairs of intermeshing rotors (of different profiles mounted on common shafts) are held in correct phase relation by a pair of timing-gears. The timing-gears and the adjacent double-row angular contact ball-bearings, are oil lubricated. The low vacuum stage of the IQDP pump has an indirect cooling system, all other stages are air-cooled by natural convection and radiation. In the secondary circuit of the indirect cooling system, coolant circulates around the pump-body by natural convection. In the primary circuit, cooling-water is circulated through copper coils to extract heat from the coolant. In operation, the pump is maintained at a constant temperature by a TCV (thermostatic control-valve) which controls the supply of cooling-water to the primary circuit in the pump. The pump-motor is cooled by water flowing through a cooling jacket which surrounds the motor. The pump-motor cooling circuit is separate from the pump cooling circuit. The cooling-water supply and return pipelines are connected to the pump by connectors on the end of the IQ system. A surface temperature sensor is fitted to the pump-motor. The output of the sensor is monitored by the Sensor Monitoring Module and is used to provide a warning of cooling system failure. 
TECHNICAL DATA 
VALUE 
IQDP-40 
IQDP-80 
Typical Peak Pumping Speed 
50 Hz
60 Hz
 
CFM 
 
44 m3h-1
55 m3h-1
 
80 m3h-1
96 m3h-1
Displacement (Swept Vol.)
50 Hz
60 Hz
 
CFM 
 
52.0 m3h-1 
62.4 m3h-1
 
91.5 m3h-1
109.8 m3h-1
Typical Ultimate Vacuum with
Shaft Seals Purge Only
50 Hz
 
60 Hz
 
mbar
Pa
 
mbar
Pa 
 
5 x 10-2
5
 
3 x 10-2
3
 
3 x 10-2
3
 
1 x 10-2
1
Maximum Continuous Inlet
Pressure 
 
mbar
Pa 
 
1 x 103
1 x 105
 
1 x 103
1 x 105
Inlet Connection 
- 
ISO40 Bolted 
ISO63 Bolted 
Outlet Connection 
- 
NW40 
NW40