Ⅰ.Flow requirements
Determine the flow range: first of all, it is necessary to specify the liquid flow rate that needs to be transported per hour or per minute, usually in cubic metres per hour or cubic feet per minute.
Reserve margin: the pump model selected should be able to cover the flow requirements, and reserve a certain margin to cope with possible future increases.
Ⅱ. Head Requirements
to determine the head range: head is the height or pressure of the liquid being pumped up, according to the system's operating conditions to determine the required head range.
Performance curve matching: When selecting a progressive cavity pump, ensure that its performance curve covers the head required by the system.
Ⅲ.Temperature and pressure
Liquid temperature: Consider the effect of the temperature of the liquid on the pump material and working performance.
System Pressure: Determine the maximum working pressure in the system, including pipeline pressure, filters and valves to bring the pressure loss and the pressure requirements in the fluid transport.
Ⅳ.The media characteristics
fluid properties: to understand and assess the characteristics of the liquid to be transported, including viscosity, corrosivity, chemical properties and solids content.
material compatibility: according to the chemical properties of the liquid selection of pump materials, such as stainless steel, cast iron, alloy steel, etc., to ensure that the pump material can resist the corrosion and wear of the liquid.
Ⅴ.The pump material selection
corrosion resistance: choose pump materials with good corrosion resistance to extend the service life of the pump.
Abrasion resistance: Considering the abrasion problems that may be encountered during the long-term use of the pump, select materials with good abrasion resistance.
Ⅵ.Efficiency and energy consumption
high efficiency: selecting a high-efficiency screw pump can reduce energy consumption and operating costs.
Energy consumption assessment: Evaluate the energy consumption of the pump under different working conditions to ensure that it can work economically and efficiently during operation.
Ⅶ.Maintenance and service
Maintainability: Select pumps that are easy to maintain and service, including easy-to-replace parts, high availability of spare parts and technical support.
Service support: consider the after-sales service and technical support capabilities provided by the manufacturer or supplier.
Ⅷ.Brand reputation
Brand selection: choose manufacturers with a good brand reputation, they provide products usually have higher quality and reliability.
User evaluation: Check user evaluations and reference cases to understand the actual performance and user experience of different brands.
Ⅸ.Other factors
Driving method: Select the driving method such as electric motor, diesel engine or pneumatic according to the site conditions.
Installation size: Calculate the required installation size to ensure that the pump can be adapted to the site installation conditions.
Special requirements: For occasions with special requirements (such as explosion-proof, sealing performance, etc.), select a screw pump with the appropriate characteristics.
