The 2-inch progressing cavity pump is one of the most common centrifugal pump types and is used to pump various fluids in various industries, water supply, agriculture, and municipal utilities. Thanks to its unique design, which ensures efficient fluid transfer, this pump enjoys great popularity among industrial and residential customers due to its robustness, durability, and ease of maintenance.
In this article, we cover everything you need to know about 2-inch piston pumps —from their design and performance to benefits, installation methods, maintenance tips, and factors that influence choosing the best model.
Introduction to the screw pump
A centrifugal pump is a dynamic pump that uses centrifugal force to move fluid from the suction port to the discharge port. The impeller rotates at high speed, transferring kinetic energy to the fluid. The volute converts this kinetic energy into pressure, causing the fluid to exit the discharge port at a controlled pressure.
A 2-inch progressive cavity pump has a 2-inch (approximately 5 cm) outlet , which determines the pump’s flow rate and performance. This size is ideal for pumping water in medium-sized industrial facilities, garden and yard irrigation systems, and for water circulation in cooling and heating systems.
2-inch screw pump frame
The screw pump consists of the following main components:
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Pump casing:
Typically made of cast iron, steel, or bronze, it directs the fluid flow and converts kinetic energy into pressure. The volute design reduces turbulence and increases pump efficiency. -
Impeller:
The heart of the pump, responsible for transferring energy to the fluid . Impellers can be closed, semi-open, or open and are made of bronze, steel, or durable plastic. -
Shaft:
Transfers power from the motor to the impeller. The shaft is typically made of stainless steel, which offers excellent corrosion resistance. -
Bearings and seals:
Bearings reduce shaft friction and seals prevent fluid leaks. -
Electric motors:
Electric pumps use variable-horsepower electric motors (from 1 to 5 hp for models with a 2-inch piston diameter) to transfer power to the pump shaft. Diesel or gasoline pumps also use internal combustion engines.
How a 2-inch screw pump works
When the pump is switched on, the impeller begins to rotate. During rotation, centrifugal force draws the fluid in the center of the impeller into the blades and pushes it against the volute wall. This reduces the pressure in the center of the impeller, allowing more fluid to flow through the suction port. The fluid eventually exits the pump outlet under high pressure.
This cycle is repeated continuously, maintaining a steady flow of fluid throughout the system.
Advantages of 2-inch screw pumps
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High efficiency and smooth flow:
The spiral design reduces pressure drop and improves fluid delivery efficiency. -
Easy installation and maintenance:
The pump has a simple structure and is convenient to maintain , and the parts can be easily replaced. -
FOR MEDIUM TO LARGE VOLUMES:
The 2-inch diameter opening ensures a good balance between output pressure and water flow. -
Corrosion and abrasion resistance:
Pumps made of cast iron or stainless steel have an extremely long service life. -
Wide range of applications: Can be used
for water supply, industrial and agricultural water supply, heating and cooling systems and small-scale wastewater treatment.
Using a 2-inch screw pump
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Agricultural irrigation systems and greenhouses
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Water transport in cities and industrial facilities
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Pumping water from a well or pond
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Water cycle in cooling towers and heating, ventilation and air conditioning systems
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Supply of low-viscosity chemical liquids (steel models)
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Oil refineries and food processing
Important points when choosing a 2-inch progressive cavity pump
Before purchasing, you should carefully check the following parameters:
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Flow rate: the amount of water pumped
by a pump per unit of time (liters/minute or cubic meters/hour). -
Head:
The difference in height between the pump inlet and outlet. The higher the head, the more power the pump requires. -
Casing and impeller material:
Cast iron is suitable for clean water, but stainless steel is recommended for aggressive or chemical liquids. -
Motor type:
Single-phase motors are suitable for domestic use, while three-phase motors are suitable for industrial use. -
Operating medium temperature:
When used in heating or cooling systems , the permissible temperature range of the pump must be taken into account. -
Brand and customer service:
Choosing a reliable brand with readily available parts can reduce maintenance costs in the long run.
Maintenance and care of screw pumps
Regular maintenance of a screw pump extends its service life and prevents costly breakdowns. Here are some important maintenance tips:
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Check the oil level in the bearings regularly.
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Clean the inlet filter and keep it free of solid particles.
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Check the condition of the mechanical seal and make sure there are no leaks.
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Use the correct voltage and avoid voltage fluctuations.
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Store the pump in a dry, moisture-free place.
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If the system is not used for a long period of time, the pump fluid must be completely drained .
2-inch vortex pump from a well-known brand on the Iranian market
The Iranian market offers numerous domestic and foreign brands of 2-inch screw pumps with various specifications. Among the most popular are:
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Pompilian
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Lion
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stroke
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Possibilities
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The Iranian bomb and Tavangostar
Each brand produces different models of 2-inch screw pumps with cast iron or steel casings and motors of different sizes.
Price of a 2-inch vortex pump
The price of these pumps depends on the casing material, brand, motor power, and country of manufacture. In 1404, the price of a 2-inch screw pump ranged from 10 to 40 million tomans
. Iranian cast iron pumps are more economical, while steel or European pumps, although more expensive, are more durable and efficient.
Finally
Thanks to advanced technology and reliable operation, 2-inch progressive cavity pumps are ideal for pumping water and light liquids in industry, agriculture, and construction.
Selecting the right pump based on flow rate, water pressure, fluid type, and motor power is crucial for system efficiency . Regular maintenance and inspections also extend the life of the system and help avoid costly repairs.
If you are planning to purchase a 2-inch piston pump, it is recommended that you purchase it from a reputable dealer with reliable customer service and carefully review the system specifications before making a final decision.