Centrifugal Pumps
SKWS High Temperature Centrifugal Pump
Horizontal pump rated for pressurised circulation to 240 degrees.
View specifications →Centrifugal Pumps
SKWR Horizontal Hot Water Pump
For pressurised cyclic transport of high temperature water in metallurgy, chemical and process plants, where a standard water pump would be at its limit.
Overview
What This Pump Does
The SKWR is the hot water build of the horizontal platform, rated for fluid up to 120 degrees Celsius. It is used for pressurised circulation rather than open transfer, which is where temperature and system pressure act on the seal at the same time.
Hydraulics, footprint and materials follow the SKW family: 1.5 to 1500 m3/h, head to 150 m, drives to 160 kW, with cast iron, stainless steel or bronze wetted parts.
| Working Principle | Centrifugal |
|---|---|
| Main applications | Water |
| Driver | Electric motor |
| Power Specs | 380/415 V 220v,3phase;50hz/60hz |
| Max. permissible fluid temperature | 120°C |
| Type of connection | Flange |
Key Benefits
Designed For Hot Circulating Duty
120 Degree Fluid Rating
Published for pressurised cyclic transport of high temperature water, not simply tolerated at it.
Seal Arrangement For Heat
Hard alloy mechanical seal faces, or a packing gland where the plant prefers to manage a gland on hot duty.
Compact Horizontal Set
Close coupled construction keeps the installation small inside a crowded boiler or process house.
Material Choice
Cast iron, stainless steel or bronze casing and impeller depending on the water chemistry.
Application Scenarios
Where It Is Installed
Metallurgy Plant Circuits
Pressurised hot water circulation on process cooling and heating loops.
Chemical Plant Heating
Hot water circuits feeding jacketed vessels and exchangers.
District And Building Heating
High temperature circulation where the circuit is closed and pressurised.
Who It Is For
- Process plants running pressurised hot water circuits
- Boiler house and energy centre contractors
- Metallurgy and chemical operations
- Maintenance teams replacing a pump that fails on hot duty
Problems It Solves
Standard pumps fail at temperature
An 80 degree rated pump on a 110 degree circuit destroys seals. A pump rated to 120 degrees removes the cause rather than the symptom.
Pressurised circuits stress the seal
Seal faces and arrangement are specified for the combination of temperature and system pressure.
Water chemistry attacks the casing
Material choice lets the casing match the treated water rather than a generic specification.
Technical Features
How It Is Built
- Maximum permissible fluid temperature 120 degrees Celsius
- Close coupled horizontal construction
- Mechanical seal with hard alloy faces or packing gland
- Free passage 0.2 mm, maximum specific gravity 1.1
- Flanged connections to 500 mm caliber
- Drive ratings to 160 kW
Specifications
Technical Data
SKWR data sheet figures. On pressurised circuits, state system pressure as well as temperature so the seal arrangement is correct.
| Working Principle | Centrifugal |
|---|---|
| Main applications | Water |
| Driver | Electric motor |
| Power Specs | 380/415 V 220v,3phase;50hz/60hz |
| Max. permissible fluid temperature | 120°C |
| Type of connection | Flange |
| Installation position | Horizontal |
| Casing/Impeller material | Cast iron, Stainless steel/Cast iron, Stainless steel, Bronze |
| Shaft seal type | Mechanical seal; Packing gland |
| Free passage | 0.2 mm |
| Maximum gravity | 1.1 |
| Maximum drive rating | 160kW(215hp) |
| Maximum caliber | 20 inch(500mm) |
| Maximum head | 150m |
| Flow rate range | 1.5-1500 m3/h ( 25-25000 l /m) |
Materials And Process
What Goes Into Every Unit
Materials
- Cast iron casing and impeller
- Stainless steel option
- Bronze impeller option
- Hard alloy seal faces
Manufacturing And Assembly
- Casting and machining at the works
- Impeller balancing
- Assembly and hydraulic test
- Documentation and export packing
Quality Control
- Hydraulic test before dispatch
- Seal arrangement verified against the stated duty
- Factory acceptance test record issued
Customization Options
- Material selection for treated or untreated water
- Mechanical seal or packing gland
- Motor rating and supply voltage
- Flange standard to suit the circuit
Compared With Other Options
| SKWS high temperature pump | The SKWS is rated to 240 degrees. Choose it when the circuit runs above the 120 degree limit of the SKWR. |
|---|---|
| Heat transfer magnetic drive pump | For thermal oil or unattended high temperature duty, a magnetic drive pump has no seal at all, but at much smaller flows. |
Use Guide
Commissioning A Hot Water Pump
Vent Fully
Air in a hot circuit collects at the pump. Vent before the first start and after any refill.
Raise Temperature Gradually
Bring the circuit up in stages rather than in one step so the seal and casing heat evenly.
Check Expansion
Confirm the circuit has proper expansion and pressurisation before running hot.
Record Hot Duty
Note flow, pressure and current at working temperature, which is the only meaningful baseline on a hot circuit.
Answers
SKWR Horizontal Hot Water Pump FAQ
How hot can the water be?
Maximum permissible fluid temperature is 120 degrees Celsius on this model.
What if my circuit runs hotter?
Use the SKWS horizontal or SKGS vertical high temperature models, which are rated to 240 degrees.
Is it suitable for thermal oil?
No. For hot oil use the magnetic drive heat transfer line, which is rated to 350 degrees and has no shaft seal.
Which seal is recommended for hot water?
A mechanical seal with hard alloy faces is standard. On some plants a packing gland is preferred because it can be adjusted on site.
Does the pump need special pipework?
It needs properly supported pipework, venting and expansion on a closed circuit, like any hot water pump.
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View specifications →Need SKWR Horizontal Hot Water Pump Sized For Your Duty Point
Send circuit temperature, system pressure and flow, and the seal arrangement will come back with the model.