LEISTRITZ Screw Pumps were conceived in the 1920’s. By 1926, LEISTRITZ received the patents for a Twin Screw Pump, which incorporated the Hydraulic Balance of Screw Thrust Forces. These pumps featured a two start main screw and a three start idler screw. The hydraulic balance of thrust forces was accomplished by ulitilizing the end faces of the pumping screws as hydraulics pistons. LEISTRITZ Screw Pumps of today still feature very much the same principles.
LEISTRITZ Screw Pumps have been improved most progressively, ever since their inception, with regard to their internal efficiency. Also, continuous improvements were made with respect to the applied manufacturing methods and to the selection of materials.
Advantages
LEISTRITZ Screw Pumps of today embody a good number of outstanding advantages, some of which are:
- hydraulic balance of thrust forces
- flow discharge free of pulsation
- flow discharge without froth generation
- minimum service requirement
- high suction lift
- high compactness
- steady and continuous flow discharge
- flow discharge free of turbulence
- extreme service longevity
- high self priming capability
- very low noise generation
- low system weight
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L2 Series
An extremely rugged two-rotor pump without timing gears and with only one shaft seal. With no contact between rotors and liner, the L2 pump is ideal in handling fluids with high or low viscocity, with poor lubricity and abrasives.
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L3 Series
A simplified three rotor screw pump with total hydraulic balancing and built-in releif valve as standard features. The cartridge-style pump models are simple to maintain and allows customized pump casings for direct fit replacement of older pumps.
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L4 Series
The two rotor timed pump with external bearing allows pumping of practicaly any liquid. As standard features it has integral shafts and rotors as well as replacable liners. The multi-phase version of the pump has extremely short and stiff rotors for handling up to 100% gas at high pressures. The design allows for total customization with various seal material and mounting options.
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L5 Series
This five rotor single flow pump has a very high capacity paired with an extreme suction lift capability. The pump is very efficiently used as a transfer pump or unloading pump for heavy oils and asphalt.
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Robuschi