Varisco S.p.A.
Z.I. Nord - Terza Strada, 9 - 35129 PADOVA – ITALY
Tel.+39.049.8294111 Email: export@variscospa.com
Fax+39.049.8076762 Web: www.variscospa.com
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The fluid coming from the stator/rotor group is conveyed to the central body, and then ejected
through the outlet.
3 BRIEF DESCRIPTION OF THE PRODUCT
3.1 MAIN TECHNOLOGICAL FEATURES OF PROGRESSING CAVITY PUMPS
• Steady capacity, proportional to motor speed.
• Self-priming, with a min. suction of 4 mt, depending on the number of stages and rpm of the
pump.
• Pumping of non-homogeneus products, containing gas and abrasive or solid and fibrous
material in the fluid.
• Pumping of very high viscous liquids.
• Dosage of liquids.
• No inlet or delivery valves.
• Centrifugation-free pumping with low-tension stress in the pumped material.
• High pumping pressure (6 BAR for each stage). Pumps may have one up to four stages,
according to the pressure required:
(1)
(4)
3.2 CLASSIFICATION
Progressing cavity pumps are divided into two main categories, according to the coupling between
pump and motor:
• Progressing cavity pumps WITH BEARING HOUSING.
• Progressing cavity pumps CLOSED COUPLED.
3.3 MOTORS
Motors can be of different kinds; the pump can be fitted to:
• Electric motors
• Hydraulic motors
• Gearmotors
• Torque converters
01 Outlet
02 Rotor
03 Stator
04 Connecting Rod
05 Hollow shaft
06 Pump body
07 Shaft seal
08 Bearing housing
09 Close coupled
10 Male shaft
11 Shaft joints
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