None, Pump Only Screw Pumps
Last Updated: April 1, 2025
Description
Screw pumps are a type of positive displacement pump that utilize a rotating screw-shaped rotor to move fluid between the screw threads. These pumps are known for providing the highest flow rates among positive displacement pumps and can handle a wide range of liquids and consistencies at various flows and pressures.
Working Principle
Screw pumps operate by using a rotating screw-shaped rotor that moves fluid between the threads of the screw. This design allows the pump to be self-priming and to have a high tolerance for entrained air. The fluid velocities inside the pump are generally small, which minimizes churning or foaming. The even compression of the process gas across the entire length of the screw ensures consistent temperature distribution, enhancing thermal efficiency and stability.
Applications
Screw pumps are commonly used in water and wastewater treatment applications. They are particularly effective in handling untreated sewage, excess sludge, or concentrated slurries, which require higher power motors due to their viscosity. Additionally, screw pumps are utilized in chemical and pharmaceutical processes where maintaining the integrity of the process gas is crucial.
Advantages over other Screw Pumps
Screw pumps provide the highest flow rates of all positive displacement pumps, making them suitable for applications requiring large volumes of fluid transfer. Their ability to handle a wide range of liquids and consistencies, along with their self-priming capability and high tolerance for entrained air, sets them apart from other types of screw pumps.
Limitations
One limitation of screw pumps is that their efficiency depends on the rotor turning at a rate that allows each cavity to fill completely. If this condition is not met, the pump may not operate at full capacity. Additionally, the viscosity of the fluid and the lift required can affect the speed and power needed for operation.
Considerations
When considering screw pumps, it is important to evaluate the initial costs, operating expenses, and maintenance requirements. The durability and accuracy of the pump are crucial factors, as is the cost of replacement and maintenance. Ensuring that the pump operates at the correct speed and power for the specific application will help maintain efficiency and reduce long-term costs.
from jbj Techniques Limited
Non lubricating low and medium viscosity and corrosive fluids. Suitable for water, light chemical and petrochemical products, fuel and heavy oils. Admissible delivery pressure (continuous) 10 bar at 1000 to 3600 rpm. [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 580.2
- Liquid Flow: 2640.0
- Media Temperature: 32 to 572
from jbj Techniques Limited
Non lubricating low and medium viscosity and corrosive fluids. Suitable for water, light chemical and petrochemical products, fuel and heavy oils. Admissible delivery pressure (continuous) 16 bar at 1000 to 3600 rpm. [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 580.2
- Liquid Flow: 5280.0
- Media Temperature: 32 to 572
from jbj Techniques Limited
For hydraulic or lubricating oils. Maximum pressure 40 bar or 200 bar (depending by flow meter dimension). [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 580.2 to 2900.8
- Liquid Flow: 1848.0
- Media Temperature: 5 to 302
from jbj Techniques Limited
For hydraulic oils, lubricating oils. Special version for heavy fuel. Allowable delivery pressure (continuous) up to 16 bar from 1000 to 3600 rpm (viscosity < 10 cSt) or up to 40 bar ( > 10 cSt) [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 580.2
- Liquid Flow: 10.8
- Media Temperature: 32 to 302
from jbj Techniques Limited
For hydraulic oils, lubricating oils. Admissible delivery pressure: 10 bar. Standard valve setting: 6 bar. Main field of application: Low pressure lubrication systems, auxiliary filtration systems, cooling systems. [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 145.0
- Liquid Flow: 5.5 to 42.2
- Media Temperature: 32 to 212
from jbj Techniques Limited
Handled fluid Fuel oil HFO - DO - LSMGO hydraulic and Lube oils. Viscosity range from 1,2 to 5000 cSt. Pump speed from 750 to 3600 rpm. Rotation (viewed from coupling end) CW (Std version; CCW on demand). [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 232.1
- Liquid Flow: 52.8
- Media Temperature: 32 to 302
from jbj Techniques Limited
For hydraulic oils, lubricating oils. Special version for heavy fuel. Allowable delivery pressure (continuous) up to 16 bar from 1000 to 3600 rpm [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 232.1
- Liquid Flow: 52.8
- Media Temperature: 32 to 302
from jbj Techniques Limited
For cooling lubricants with low viscosity and minimum lubricating properties (min. oil 4%). Admissible delivery pressure (continuous) 100 bar at 2900 rpm. [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 580.2
- Liquid Flow: 171.6
- Media Temperature: 32 to 248
from jbj Techniques Limited
For hydraulic oils, lubricating oils. Admissible delivery pressure (continuous) 120 bar at 2900 rpm. [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 580.2
- Liquid Flow: 171.6
- Media Temperature: 32 to 248
from jbj Techniques Limited
For hydraulic oils, lubricating oils. Admissible delivery pressure (continuous) up to 30 bar at 1800 rpm. [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 435.1
- Liquid Flow: 1267.2
- Media Temperature: 32 to 248
from jbj Techniques Limited
For hydraulic oils, lubricating oils. Special version for heavy fuel. Allowable delivery pressure (continuous) up to 16 bar from 1000 to 3600 rpm (vertical arrangement). Allowable delivery pressure (continuous) up to 16 bar from 750 to 1800 rpm (horizontal arrangement). [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 232.1
- Liquid Flow: 1267.2
- Media Temperature: 32 to 302
from jbj Techniques Limited
For hydraulic oils, lubricating oils. Special version available for heavy fuel oils. Allowable delivery pressure (continuous) up to 16 bar from 750 to 1800 rpm. [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 232.1
- Liquid Flow: 2640.0
- Media Temperature: 32 to 302
from jbj Techniques Limited
Handled fluid Fuel oil HFO - DO - LSMGO hydraulic and Lube oils. Viscosity range from 1,2 to 5000 cSt. Pump speed from 750 to 3600 rpm. Rotation (viewed from coupling end) CW (Std version; CCW on demand). [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 232.1 to 580.2
- Liquid Flow: 10.8
- Media Temperature: 32 to 302
from SEEPEX Inc.
SEEPEX BTEI range pumps are a further development of the BTI and BTE pumps. They have individually adjustable supply tanks, which replace additional storage in the system. Conveying Medias. For highly viscous to semi-solid products that tend to bridge. Properties. Conveying capacity: 0.5 m ³/h... [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 525.0
- Liquid Flow: 440.0
- Discharge Size: 10.000
from KRAL AG
The new generation Series K has been thoroughly reengineered. As the most sold universal pump series K offers a number of benefits. The pump prevents the accumulation of residue forming fluids by locating the leakage hole before the ball bearing. Secondly, KRAL offers the advanced quality of SiC... [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 232.0
- Liquid Flow: 1.5 to 13.0
- Discharge Size: 0.980
from SEEPEX Inc.
SEEPEX BTI range pumps offer a rectangular hopper with an integrated and adjustable bridge breaker. Conveying Medias. For highly viscous to semi-solid products that tend to bridge. Properties. Conveying capacities: 100 l/h – 130 m ³/h (0.44 USGPM – 572 USGPM). Pressure: up to 36 bar... [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 525.0
- Liquid Flow: 572.0
- Discharge Size: 10.000
from KRAL AG
Model EML/EMS 11. KRAL Oil Burner - Supply Station. Type EML for extra light fuel. Type EMS for heavy fuel oil. Pressure stage up to 40 bar. From 300 to 7500 l/min. Oil burner pump station as basic module consisting of : Screw pump with built-in safety valve, largely sized suction filter and... [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 580.2
- Liquid Flow: 79.2 to 1980.0
- HP: 1.47 to 10.05
from SEEPEX Inc.
SEEPEX BTQ range pumps have a wide square inlet and an identical footprint to the BN range pumps. Conveying Medias. For medium to highly viscous products with low flowability. Properties. Conveying capacity: 50 l/h – 100 m ³/h (0.22 – 440 USGPM). Pressure: up to 24 bar (350 psi). [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 350.0
- Liquid Flow: 440.0
- Discharge Size: 6.000
from KRAL AG
KRAL Double Stations DKC/DMC. The new, compact KRAL double stations with numerous functions. Based on 40 years of experience supplying double stations to leading booster module manufacturers KRAL is now releasing its new reengineered design. The completely new design of these stations allows KRAL... [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 232.1
- Liquid Flow: 26.4 to 75.0
- Discharge Size: 2.000
from SEEPEX Inc.
The BTM range pumps have an integrated macerating device in the compression zone which allows for easy processing in subsequent processes. Conveying Medias. For products with large pieces of fruits and vegetables. Properties. Conveying capacity: 0.25 m ³/h – 130 m ³/h (1.1 USGPM... [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 350.0
- Liquid Flow: 572.0
- Discharge Size: 10.000
from SEEPEX Inc.
SEEPEX open hopper pumps handle viscous to semi-solid products with low or no flowability. They come in 10 ranges with multiple variations within each range and are suitable for nearly all industrial sectors. For highly viscous, semi-solid and shear-sensitive products that tend to bridge. Conveying... [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 525.0
- Liquid Flow: 572.0
- Discharge Size: 10.000
from SEEPEX Inc.
SEEPEX BTHE range pumps feature a large open hopper with vertical walls. The centric and edge running ribbon screw ensures an optimum product inflow to the pump's conveying elements. Conveying Medias. For highly viscous to semi-solid products that tend to bridge. Properties. Conveying capacity: 0.5... [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 525.0
- Liquid Flow: 572.0
- Discharge Size: 10.000
from SEEPEX Inc.
SEEPEX metering pumps achieve a metering accuracy of ±1%. They ’re used wherever low to highly viscous media, media containing solids and chemically corrosive media are processed and all with low pulsation and to the exact drop. Key Facts. Conveying Capacity 0.2 l/h - 1,000 l/h 0.053... [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 348.0
- Liquid Flow: 5.4
- Discharge Size: 0.750
from SEEPEX Inc.
SEEPEX BTVE range pumps are designed with an enlarged rectangular open hopper and a sliding compression casing. Conveying Medias. For highly viscous and semi-solid products that tend not to bridge. Properties. Conveying capacity: 0.5 – 120 m ³/h (2.2 – 530 USGPM). Pressure: up to 36... [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 525.0
- Liquid Flow: 530.0
- Discharge Size: 10.000
from SEEPEX Inc.
SEEPEX BT range pumps have a large rectangular open hopper with a compression zone and auger feed screw. Conveying Medias. For highly viscous products with low flowability. Properties. Conveying capacities: 100 l/h – 300 m ³/h (0.44 USGPM – 1,320 USGPM). Pressure: up to 36 bar (525... [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 525.0
- Liquid Flow: 1320.0
- Discharge Size: 10.000
from SEEPEX Inc.
SEEPEX food pumps are used in the pharmaceutical, food, cosmetic and chemical industries or wherever a clean, sterile and hygienic atmosphere is needed. They comply with the most stringent hygiene regulations like FDA, 3-A Sanitary Standards and EHEDG and are also maintenance-friendly. Key Facts. [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 348.0
- Liquid Flow: 572.0
- Discharge Size: 6.000
from SEEPEX Inc.
SEEPEX BTEX range progressive cavity pumps with their robust design and reinforced components are used in extreme conveying applications in the agriculture and biogas industries. Conveying Medias. Products commonly found in the agriculture and biogas industries. Properties. For extreme conveying... [See More]
- Power Source: NoSourceIncluded
- Discharge Size: 10.000
- Discharge Pressure: 120.0
- Pump Housing Material: Cast Iron (optional feature); Stainless Steel (optional feature); HDPE
from SEEPEX Inc.
SEEPEX BTES range pumps have large hopper lengths and a shuttered closing system making them ideal for silo discharge systems. The pumps also ensure simple maintenance even when the silo is full. Conveying Medias. For highly viscous to semi-solid products from silo systems. Properties. Conveying... [See More]
- Power Source: NoSourceIncluded
- Discharge Pressure: 350.0
- Liquid Flow: 572.0
- Discharge Size: 10.000