The single vane impeller of the Screw Centrifugal pump creates a single channel flow, allowing for larger solids passage. The large solids passage provides better solids handling capabilities than any other pump type. The steep head-capacity curve provides ample reserve pressure to clear temporary clogs.
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Screw Pumps
Flowserve Twin Screw Pumps (TSP)
The Flowserve TSP is a double suction, twin screw pump designed for continuous service in high viscosity applications. With the design characteristics of positive displacement, pulse-free flow, and high suction lift/self-priming capabilities, it delivers smooth, constant flow across a wide range of viscosities, temperatures, and pressures.
Industries
- General Industry
- Chemicals
- Oil & Gas
Industry Sectors
- Pulp & Paper
- Other Industries
- Basic (Organic & Inorganic)
- Specialty (Fine & Consumer)
- Petrochemicals
- Upstream Exploration & Production
- Midstream Transportation
- Downstream Processing
Operating Parameters
- Flows to 2550 m3/h (11200 gpm)
- Pressures to 100 bar (1450 psi)
- Temperatures to 450°C (850°F)
- Viscosities to 200 million SSU
Features and Benefits
- Double-Suction Design provides balanced hydraulic loads by channeling incoming flow to the screw inlets at each end of the pump
- External Bearings and AGMA 11 Timing Gears are in separate oil reservoirs to eliminate exposure to the pumped fluid
- Versatile ISO 21049/API 682 Seal Chamber readily accommodates multiple seal types and meets HSE regulations without modification
- Split Bearing Bracket Construction facilitates easy maintenance of individual bearings and mechanical seals
- Modular Non-Welded Casing is available in multiple standard and specialty alloys
- Nozzles integral to the outer casing insulate the inner casing from piping loads, helping to maintain a non-contacting shaft design
- Screws integral with shaft to prevent deflection during high loading
Flowserve Multiphase Twin Screw Pumps (MP1)
The Flowserve MP1 is a double suction, twin screw pump designed for continuous service in high viscosity applications where multiple phases are expected. With its unique double case design, it acts inherently as a separator to run multiphase products up to 100% gas void fractions at a wide range of flow rates, pressures, and viscosities.
Industries
- General Industry
- Oil & Gas
Industry Sectors
- Food & Beverage
- Other Industries
- Upstream Exploration & Production
- Midstream Transportation
Operating Parameters
- Flows to 2250 m3/h (10000 gpm)
- Pressures to 50 bar (720 psi); custom designs for higher pressures
- Temperatures to 450°C (850°F)
- Viscosities to 8000cP
- Gas void fractions up to 100%
Features and Benefits
- Double-Suction Design provides balanced hydraulic loads by channeling incoming flow to the screw inlets at each end of the pump
- External Bearings and AGMA 11 Timing Gears are in separate oil reservoirs to eliminate exposure to the pumped fluid
- Versatile ISO 21049/API 682 Seal Chamber readily accommodates multiple seal types and meets HSE regulations without modification
- Split Bearing Bracket Construction facilitates easy maintenance of individual bearings and mechanical seals
- Modular Non-Welded Casing is available in multiple standard and specialty alloys
- Nozzles integral to the outer casing insulate the inner casing from piping loads, helping to maintain a non-contacting shaft design
- Screws integral with shaft to prevent deflection during high loading
- Unique dual case design retains liquid for operation at high GVF in multiphase applications
Trillium Screw Centrifugal Pump
The Trillium Screw Centrifugal pump is equipped with a classic single vane screw centrifugal impeller.
Trillium applies advanced pump design technology to increase product performance, reduce cost and improve lead time. The long-established screw centrifugal design provides clog-resistant pumping for trouble free movement of solids, and fibrous and stringy materials. The steep head-capacity curve produced by the impeller provides additional head to help push through any partial blockages.
The combination of a low NPSH requirement and large solids channels provides a powerful pump for handling thick sledges. The steep head-capacity curve of the Screw Centrifugal pump also allows for pumping of varying sludge consistencies without the need to change speed. An additional benefit is the reserved head for clearing temporary line blockages.
Consistent impeller to liner clearance is imperative to the performance of the pump. As the pump components wear, clearance between the impeller and liner can be adjusted to ensure optimal performance.
Key features/benefits
- High efficiency
- Low NPSH requirements
- Steep head/capacity curve
- Flushless tandem mechanical seals
- Adjustable liners
- Large solids passage
- Solids Passage: 2.5 – 4.75 in
- High Chrome Iron impeller & liner
- ASTM A532 Class III Type A
Applications
- Sludges
- Raw & unscreened sewage
- Paper stock & wood chips
- Wet well cleanup
- Crystalline compounds
- Bacterial Floc
- Easily damaged fruits & vegetables
- Coal
Configurations
- Horizontal
- Vertical
- Submersible
- Prerotation
Processes
- Materials handling (Industrial)
- Water and waste water
Netzsch Multi Screw Pumps (MSP)
The Netzsch family of NOTOS Multi Screw Pump (MSP) has a superior quality to meet the demands of high standards of our customers. Having the NETZSCH High Efficiency Unique Design (HEUD), the multiple screw pump covers a wide range of applications. The pumps are designed to work with low to high lubricant fluids, low to high viscosity, shear sensitive and/or chemically aggressive media.
Material
- Housing: cast iron
- Screws: nitride steel
- Bushings: bronze
- Optional materials upon request
Characteristics
- Hydraulically balanced
- High suction power (up to 8 m.a.s.l.)
- Quiet operation
- Continuous flow without pulsation
- Flow without turbulence
- Mechanical seal under suction pressure
- No foaming
- Low maintenance
- Low lifecycle cost
- Long lifetime in service
- Hydrodynamic bearings
Netzsch 2 NS – Two Screw Pump
This Netzsch pump operates with a drive screw intermeshing with a driven screw transferring torque from one to the other. The screws are surrounded by the pump housing made of ferrous material. The screw geometry and the housing form the pumping chamber. Rotation, screw diameter, and screw pitch define the pump‘s flow rate. The product lubricates the internals. Four special bushings keep the screws aligned. The axial force resulting from the pumping motion is practically nil due to the pump’s hydraulic balancing.
The NOTOSTM Two Screw Pumps have a drive screw intermeshing with a driven screw, transferring torque from one screw to the other.
- Flow up to 500 m/h³ (2200 gpm)
- Pressure up to 16 bar (230 psi)
- Temperature up to 300°C (570°F)
- Viscosity up to 12,000 cSt
The main advantages are hydraulically balanced, quiet operation, long lifetime in service and flow without pulsation.
Netzsch 3 NS – Three Screw Pump
This Netzsch pump operates with a drive screw intermeshing with two driven screws transferring torque from one to the other. The screws are surrounded by the pump housing made of ferrous material. The screw geometry and the housing form the pumping chamber. Rotation, screw diameter, and screw pitch define the pump‘s flow rate. The product lubricates the internals. Four special bushings keep the screws aligned. The axial force resulting from the pumping motion is practically nil due to the pump’s hydraulic balancing.
The NETZSCH Three Screw Pumps have one drive screw intermeshing with two driven screws, transferring torque from one screw to the others.
- Flow up to 200 m/h³ (880 gpm)
- Pressure up to 80 bar (1160 psi)
- Temperature up to 300°C (570°F)
- Viscosity up to 10.000 cSt
The main advantages are high efficiency, easy maintenance, lightweight, small footprint and pulsation free operation
Netzsch 4 NS – Four Screw Pump (Geared Twin)
Two shafts with four screws rotate inside a cartridge. The screws do not touch each other, and do not touch the cartridge. Therefore there is no metal-to-metal contact in this pump type. Synchronization of the two shafts is effected by a pair of timing gears remote from the pump chamber. The fluid is pumped from the extremities towards the center. The pumping chamber is formed by the four screws and the cartridge.
The Netzsch NOTOSTM Four Screw Pumps (Geared Twin Screw Pumps) have two shafts with four screws rotating inside a cartridge with timing gears. No contact metal against metal.
- Flow up to 1500 m/h³ (6600 gpm)
- Pressure up to 80 bar (1160 psi)
- Temperature up to 300°C (570°F)
- Viscosity up to 50.000 cSt
The main advantages are that there is no metal contact, complies with API 3rd edition, small footprint and long operational lifetime.