Key Features
- Corrosion-resistant material options: SS304, SS316L, Duplex 2205, Super Duplex 2507 and SS904L are available for different wastewater conditions.
- Fully submersible installation: The pump and motor operate as one submerged unit, reducing the need for a separate surface pump room.
- Multiple hydraulic configurations: The impeller and internal passage can be selected according to the required flow, head, solids size and fibrous content.
- Wide performance range: Different discharge diameters, motor powers and operating speeds are available for municipal and industrial wastewater projects.
- Automatic coupling option: Guide-rail and automatic coupling systems are available for applicable models, simplifying installation and removal from wastewater sumps.
- Customized electrical configuration: Voltage, frequency, phase, cable length and motor-protection requirements can be selected according to the project.
How Does a WQP Submersible Sewage Pump Work?
The WQP pump is installed below the liquid level. When the motor starts, it drives the impeller directly and creates a pressure difference at the pump inlet. Wastewater enters through the suction opening, passes through the impeller and pump casing, and is discharged into the connected pipeline.
The impeller and internal passage affect the pump’s ability to handle suspended solids and fibrous material. The solids-handling capability must be checked according to the impeller type, free passage, discharge diameter and characteristics of the wastewater.
The selected operating point should also be verified on the pump performance curve. Continuous operation outside the recommended range may increase vibration, energy consumption, clogging risk and component wear.
Stainless Steel Material Options
SS304 provides general corrosion resistance and may be suitable for relatively mild wastewater with limited chloride content.
SS316L normally provides better chloride resistance than SS304 and can be considered for moderately corrosive industrial wastewater.
Duplex 2205 offers higher strength and improved resistance to chloride-related corrosion, making it suitable for more demanding wastewater conditions.
Super Duplex 2507 may be considered for seawater, high-chloride wastewater and other highly saline conditions, subject to liquid analysis.
SS904L may be selected for certain acidic or aggressive industrial liquids after technical compatibility review.
Material compatibility cannot be determined from the application name alone. The liquid’s chemical composition, concentration, pH, chloride level, temperature, solids content and cleaning chemicals should be reviewed before the final material is confirmed.
The pump casing, impeller, shaft, fasteners, mechanical seals and elastomers may require different material combinations. Selecting a stainless steel pump does not automatically mean that every internal component is manufactured from the same stainless steel grade.
Information Required for Pump Selection
To recommend a suitable WQP stainless steel sewage pump, please provide:
- Required flow rate
- Required head or complete pipeline information
- Wastewater source and application
- Liquid temperature
- pH and chemical composition
- Chloride or salinity level
- Maximum solids size
- Solids concentration
- Presence of fibres, rags or other stringy material
- Sump depth and installation method
- Discharge-pipe diameter and length
- Available voltage, phase and frequency
- Required cable length
- Daily operating hours and expected starting frequency
The pump should not be selected from maximum flow, maximum head or motor power alone. The required duty point must be checked on the corresponding performance curve.
FAQ
What is the difference between a WQP stainless steel sewage pump and a cast-iron WQ pump?
The main difference is the material configuration. A WQP stainless steel pump is selected when the wastewater requires greater corrosion resistance than a standard cast-iron pump can provide. The hydraulic design, impeller type, motor power and solids-handling capability must still be confirmed for the actual application.
Which stainless steel grade should I choose?
SS304 may be suitable for relatively mild wastewater, while SS316L normally provides better resistance in chloride-containing environments. Duplex 2205, Super Duplex 2507 or SS904L may be considered for more demanding conditions. Final selection requires information about the liquid composition, pH, chloride level and temperature.
Can the WQP pump handle long fibres and solids?
Applicable configurations can handle wastewater containing suspended solids and fibrous material, but the allowable solids size and fibrous content depend on the impeller type, pump passage and discharge diameter. These conditions should be confirmed before selecting a model.
Can this pump handle sand, slag or abrasive slurry?
A WQP sewage pump is not automatically suitable for abrasive slurry. High concentrations of sand, slag or mineral particles can cause rapid wear. These applications should be evaluated for an abrasion-resistant slurry-pump configuration.
Can you provide 60 Hz and customized voltage?
Voltage, frequency and phase can be selected according to the destination country and motor configuration. Availability must be confirmed for the selected pump model.
Request a WQP Pump Selection
Send SLAPK your required flow, head, wastewater composition, solids information, voltage and installation method. Our engineering team will review the operating conditions and recommend a suitable WQP stainless steel sewage pump with technical data and a performance curve.
Button text: Send Your Pump Parameters
