Rubber Lobe Pumps
Sludge Lobe Pump
The rubber lobe pump specified for sludge handling duty.
View specifications →Progressing Cavity Pumps
SKPG Progressing Cavity Pump
A single screw rotor turning inside a stator, moving viscous and solid laden media at a steady rate in any mounting position.
Overview
What This Pump Does
The SKPG progressing cavity pump, often called a screw pump, is used for pumping high viscosity liquid including slurry with solids. It can be used in almost all branches of industry for low to highly viscous media with or without solids.
The pump gives steady low pulsation delivery, self primes even with air or gas liquid mixtures up to 8.5 mWS, installs in any position, has a large spherical entrance port and can be reversed to change delivery direction.
| Working Principle | Single Screw, Cavity |
|---|---|
| Main applications | Oil, Slurry, food |
| Driver | Electric motor |
| Power Specs | 380/415 V 3phase; 220/240 V 1phase;50hz/60hz |
| Max. permissible fluid temperature | 120/350°C |
| Type of connection | Flange |
Key Benefits
What A Screw Pump Does Differently
Steady Low Pulsation Flow
Sealed cavities carry the medium from suction to discharge, which keeps delivery smooth for dosing and filter feed.
High Self Priming
Priming to 8.5 mWS, even with air or gas liquid mixtures, so the pump recovers after a line drains.
Any Mounting Position
Installation possibilities in all positions let the layout follow the plant instead of the pump.
Solids Pass The Inlet
A large spherical entrance port lets solid laden media enter rather than bridge at the suction.
Application Scenarios
Where It Is Installed
Sludge And Polymer Feed
Dosing and dewatering feed where steadiness of flow decides the result.
Viscous Food And Chemical Media
Pastes, preparations and viscous chemicals moved without shear.
Oil And Slurry Transfer
Oil, slurry and food duty as listed on the data sheet, with material chosen for the medium.
Who It Is For
- Wastewater plants feeding dewatering equipment
- Food processors moving pastes and preparations
- Chemical plants with viscous media
- Mining operations handling slurry
Problems It Solves
Viscosity stalls the pump
Positive displacement action moves the same volume per revolution regardless of viscosity.
Pulsing flow upsets the process
Low pulsation delivery protects instruments, filters and dosing accuracy downstream.
No space for a horizontal set
The pump can be installed in any position, which solves awkward plant layouts.
Technical Features
How It Is Built
- Single screw cavity working principle
- Maximum permissible fluid temperature 120 or 350 degrees Celsius depending on build
- Mechanical seal or gland packing
- Cast iron, stainless steel or bronze casing and internal parts
- Flanged connections, horizontal installation as standard
- Reversible direction of rotation and delivery
Specifications
Technical Data
Published SKPG data. Viscosity at pumping temperature and particle size are what move the selection, so send both with the flow.
| Working Principle | Single Screw, Cavity |
|---|---|
| Main applications | Oil, Slurry, food |
| Driver | Electric motor |
| Power Specs | 380/415 V 3phase; 220/240 V 1phase;50hz/60hz |
| Max. permissible fluid temperature | 120/350°C |
| Type of connection | Flange |
| Installation position | Horizontal |
| Casing/Inner parts material | Cast iron, Stainless Steel/Cast iron, Stainless steel, Bronze |
| Shaft seal type | Mechanical seal,gland packing |
| Maxmium Free passage fiber | 6 m |
| Maximum viscosity | 100X104CST |
| Maximum drive rating | 22 kW(30hp) |
| Maximum caliber | 8 inch(200mm) |
| Maximum discharge-side pressure | 1.2mpa (12bar) |
| Flow rate range | 1-150 m3/h ( 16.6-1660 l /m) |
Materials And Process
What Goes Into Every Unit
Materials
- Cast iron or stainless steel casing
- Stator material selected for the medium
- Rotor in hardened material
- Mechanical seal or gland packing
Manufacturing And Assembly
- Casing and rotor machining
- Stator fitting and clearance setting
- Test run before dispatch
- Packing with documentation
Quality Control
- Rotor and stator fit checked at assembly
- Performance test before dispatch
- Factory acceptance test record with the order
Customization Options
- Stator material for the medium
- Mechanical seal or gland packing
- Mounting position and drive arrangement
- Flange sizes and standard
Compared With Other Options
| Rubber lobe pump | The lobe pump is more compact and faster to service. The screw pump handles higher viscosity with smoother flow. |
|---|---|
| Centrifugal pump | A centrifugal pump loses head as viscosity rises and cannot pass the same solids. |
Use Guide
Commissioning A Progressing Cavity Pump
Never Run Dry
The stator depends on liquid for lubrication. Fit dry run protection where the suction can empty.
Check Direction
Confirm rotation before the first run, since the pump is reversible and delivery follows the direction.
Start Against An Open Line
Open the discharge before starting. A closed valve builds pressure immediately on a positive displacement pump.
Monitor Stator Wear
A gradual drop in flow at the same speed is the normal sign the stator needs replacing.
Answers
SKPG Progressing Cavity Pump FAQ
What viscosity can it handle?
Low to highly viscous media, with or without solids. Send the viscosity at pumping temperature for the selection.
What is the temperature limit?
The data sheet gives 120 degrees Celsius standard and 350 degrees on the high temperature build.
How much self priming?
Up to 8.5 mWS, including with air or gas liquid mixtures.
Can it be mounted vertically?
Installation is possible in all positions, which is one of the published features.
What connection is supplied?
Flanged connections, with horizontal installation as the standard arrangement.
Related Equipment
Related Equipment From The Same Line
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View specifications →Need SKPG Progressing Cavity Pump Sized For Your Duty Point
Send viscosity, solids size and flow and we will confirm the pump, the stator material and the drive.