TPOW Volute Type Split Casing Double Suction Pump

TPOW Volute Type Split Casing Double Suction Pump


What is a TPOW volute type split casing double suction pump?

A TPOW volute type split casing double suction pump is a unique model of centrifugal pump for transporting clear water from one location to another at any flow and lift head required by the user within the spectrum performance range. It features a pump casing that is either radially or axially split relative to the pump shaft to facilitate quick access to the internal components for repair and maintenance. Further, the pump casing is a volute type casing, designed with a gradually enlarging flow path to help convert the kinetic energy of water into static pressure as it directs it into the discharge nozzle. The manufacturers of TPOW volute type split casing double suction pumps also develop the units with a double suction impeller to allow water to enter from either side simultaneously, minimizing cavitation and enabling higher flows. The TPOW volute type split casing double suction pump can lift water to a maximum head of 150 meters at a capacity of up to 400 liters per minute.

TPOW volute type split casing double suction pump

Figure: TPOW volute type split casing double suction pump

Components of a TPOW volute type split casing double suction pump

Electric motor

The electric motor is the source of power for the TPOW volute type split casing double suction pump. Electric motors have two main types: an alternating current (AC) motor, which runs on alternating current, or a direct current (DC) motor, which uses a direct current. The TPOW volute type split casing double suction pump can use either a single-phase AC or a three-phase AC induction motor.

Casing

The casing is a stationary component housing the rotor assembly and carrying the suction and discharge ports. It contains the pumped liquid and directs the flow in and out of the pump. The pump casing also serves as a pressure containment vessel. The pump casing for the TPOW volute type split casing double suction pump is a volute type casing. A volute casing is spiral-shaped to facilitate the conversion of the high kinetic energy of the pumped water into static pressure as the impeller discharges the liquid through the casing’s nozzle. Additionally, the pump casing is either radially or axially split to allow easier disassembly and maintenance of internal pump components.

Showing the volute casing design

Figure: Showing the volute casing design.

Showing an axially split pump casing

Figure: Showing an axially split pump casing.

Coupling

TPOW volute type split casing double suction pump manufacturers employ a long coupling to help with the quick dismantling and servicing of the pump. The coupling connects the motor’s driver shaft with the rotating pump shaft to ensure the transfer of mechanical torque to the pump head with minimal losses. The long coupling design allows access to the pump head without removing the motor. It also provides ample space between the pump and motor, protecting against water ingress in case of seal failure.

Shaft

The shaft is a rotary mechanical component centrally located within the pump and riding on bearings. Its primary purpose is to carry the rotor and connect it to the motor drive shaft via the coupling. The manufacturers of TPOW volute type split casing double suction pumps create the shaft using high-grade materials, such as stainless steel and alloy steel, to enhance their strength and ability to overcome corrosion and vibrations.

Impeller

The impeller is the main rotary component in a TPOW volute type split casing double suction pump. It features a series of backward-curved vanes. Its primary purpose is to move fluid through the pump by increasing its kinetic energy. This pump uses a closed-type radial flow impeller with a double-suction design to achieve a high flow rate and minimize cavitation.

Showing a double-suction impeller design

Figure: Showing a double-suction impeller design

Bearings

The primary role of the bearings is to support the pump shaft or the rotor assembly and to align them correctly with the fixed ends under the action of radial and axial forces. Bearings also enhance smooth rotation of the pump shaft while countering axial and lateral loads.


How does a TPOW volute type split casing double suction pump work?

A TPOW volute type split casing double suction pump operates by converting the mechanical energy of an impeller into kinetic energy of water and then fluid pressure to move it to the desired location. When the electric motor starts, the mechanical torque is transferred to the impeller via the pump shaft and the coupling. As the impeller rotates, a vacuum is created inside the pump and water flows into the pump casing and towards the impeller’s eye due to the external atmospheric pressure. As soon as the water enters the impeller’s eye, the centrifugal force acting on the impeller blades moves it radially outwards, away from the impeller center of rotation, at high tangential velocity. The swirling flow at the exit of the impeller then enters into the volute chamber, where the liquid’s kinetic energy converts into a high-pressure head as the velocity decrease due to the gradually expanding flow path. The pumped liquid then exits the pump under elevated pressure and flows to the designated location.

Types of TPOW volute type split casing double suction pumps?

Horizontal TPOW volute type split casing double suction pump

A horizontal TPOW volute type split casing double suction pump has a horizontally oriented shaft, typically with a between-the-bearings design (i.e., where the shaft and the impeller suspend between bearings on either end). Because of the horizontal orientation, this pump is easier to install and maintain. It can be easily coupled with various prime movers, e.g., a turbine, electric motor, or engine. The low headroom requirement of a horizontal TPOW volute type split casing double suction pump also makes it suitable for indoor applications where the vertical space is limited. However, this pump has a limited NPSH and low working temperature and pressure.

TPOW Volute Type Split Casing Double Suction Pump

Figure: Showing a horizontal TPOW volute type split casing double suction pump.

Vertical TPOW volute type split casing double suction pump

A vertical TPOW volute-type split casing double suction pump consists of a vertically oriented shaft that overhangs a radial bearing. It can be with a flexible, rigid, or close coupling. The vertical TPOW volute type split casing double suction pump has a variable NPSH, making it suitable for various applications. However, it may not be easy to install and maintain because it requires a lot of headroom. The overhung shaft also causes challenges at high suction pressure as it becomes challenging to balance the axial thrust. However, TPOW volute-type split casing double suction pump manufacturers fit the units with a support structure to balance the forces, including the overhung mass, rotor dynamic, and hydraulic loads.

Showing a vertical TPOW volute type split casing double suction pump

Figure: Showing a vertical TPOW volute type split casing double suction pump.

Applications of a TPOW volute type split casing double suction pump

A TPOW volute type split casing double suction pump is widely used in water treatment plants, irrigation, drainage pumping station, power station, water circulation of air-conditioning, industrial water supply systems, fire systems, and the shipping industry. Typical uses of the pump include the following:

  • TPOW volute type split casing double suction pumps are used to pump water at a high flow rate and medium pressure in domestic and industrial water supply systems.
  • They are used to supply a large flow of water to sprinkler systems in farmland irrigation.
  • They are used as circulator pumps to move hot water in pipes around buildings so that it is readily available for use, eliminating the need to run the tap and therefore saving a lot of water and money.
  • They are also used for urban water supply and urban drainage.
  • They are also used to supply water for air conditioning purposes.
  • They discharge wastewater from mines, drainage pumping stations, and iron and steel metallurgy.
  • They are also used to support fire extinguishing equipment.

Advantages of a TPOW volute type split casing double suction pump

  • It has a simple and compact structure, which is space-saving.
  • It has low noise due to the use of a double volute structure, rigid rotor, and precision bearings.
  • It has high energy and hydrodynamic efficiency.
  • It has strong cavitation resistance.
  • It has minimal maintenance requirements.
  • The split casing allows easier pump disassembly and maintenance when needed.
  • It is highly reliable.
  • It has independent motor and pump shafts; hence only one is replaced if damaged

Disadvantages of a TPOW volute type split casing double suction pump

  • It is unfit for highly viscous fluid and those with a significant percentage of suspended solids.
  • Due to the volute casing design, the pump is subject to unbalanced thrust around the impeller.
  • The vertical variant of the pump occupies more installation headroom.
  • These pumps are challenging to repair due to their structure.

Troubleshooting a TPOW volute type split casing double suction pump

The motor doesn’t run

  • The motor is poorly installed. Ensure the pump is installed to the TPOW volute type split casing double suction pump manufacturers’ standards.
  • There is a tripped circuit breaker or a blown-out fuse. Inspect and reset the circuit breaker if necessary. Inspect the pump for a blown-out fuse and replace it.
  • The motor is defective. Inspect the motor and replace it if necessary.

The pump discharge is insufficient

  • The impeller or check valve is clogged. Inspect and clear any blockage in the valve or impeller.
  • The pump is operating in reverse. Ensure that the motor rotates in the direction indicated by the TPOW volute type split casing double suction pump manufacturer using the arrow on the pump casing. Be sure to reverse the motor polarities.
  • There is air in the pump or suction pipework. Be sure to fill the pump or piping network with water to drive out the air.

The pump’s driver is overloaded

  • The pump speed is too high. Ensure the pump operates within the speed range specified by the manufacturer of the TPOW volute type split casing double suction pump.
  • Some pump parts are experiencing extreme mechanical friction. Inspect the pump assembly for any deflection or obstruction and correct it.
  • Faulty pump motor. Inspect the motor for defects and repair or replace it if necessary.

The pump vibrates excessively or produces noise

  • The pump impeller is partially clogged. Inspect and clean the impeller.
  • There are foreign materials present in the TPOW volute type split casing double suction pump. Disassemble the pump and clean it.
  • The mounting plate and the foundation lack sufficient rigidity. Reinforce the foundation, and mount the TPOW volute type split casing double suction pump tightly.
  • Some pump components are loosely mounted in the pump body. Tighten any loose parts to the torque level recommended by the TPOW volute type split casing double suction pump manufacturer.
  • Some TPOW volute-type split casing double suction pump components are unbalanced. Inspect and rebalance the parts if necessary.
  • The impeller is damaged or worn out. Repair or replace the impeller.

Summary

A TPOW volute type split casing double suction pump is a particular model of centrifugal pump primarily used for transporting clear water from one location to another at any flow and lift head required by the user. It features a pump casing that is either radially or axially split relative to the pump shaft to allow easier access to internal components. The pump’s casing is of volute type to help convert the kinetic energy of water into static pressure as the impeller moves water into the discharge nozzle. The manufacturers of TPOW volute type split casing double suction pumps chose a double suction impeller because it allows water to enter from either side simultaneously, thereby minimizing cavitation due to reduced speed at the inlet. TPOW volute type split casing double suction pumps are widely used in irrigation farmlands, water treatment plants, power stations, etc. They can efficiently generate high flow rates and fluid pressure and are highly reliable.