The rotary motion of the motor is converted to reciprocating motion by the eccentric cam mechanism which causes the volume displacement to transfer the fluid at a constant rate.

This type is used for applications in which durability is paramount such as those requiring 100% duty cycle or involving an important process, but where pulsation is not an issue.

Motor-Driven Metering Pump Tacmina

Tacmina offers a Motor-Driven Metering Pump that utilizes a unique mechanism to convert rotary motion into reciprocating motion. The eccentric cam mechanism ensures a constant rate of fluid transfer by displacing the volume effectively.

When durability is crucial and pulsation is not a concern, this pump type is the ideal choice. It is particularly suitable for applications requiring a 100% duty cycle or involving critical processes.

Model Selection Points

When selecting a Motor-Driven Pump, there are five pump head variations available. It is essential to choose the one that best suits your specific application requirements.

Direct Drive Diaphragm Type

The Direct Drive Diaphragm Type employs a single diaphragm, either made of rubber or PTFE, to transfer fluids. This model is well-suited for tasks such as water treatment, sewage processing, or the injection of boiler or air conditioning chemicals.

Double Diaphragm Type

The Double Diaphragm Type offers an added diaphragm rupture alarm sensor. By selecting the appropriate buffer fluid in the intermediate chamber, the loss incurred in case of diaphragm rupture can be minimized. This model provides a high level of safety when transferring toxic fluids, and the diaphragm’s lifespan is extended due to the distributed stress applied to the front diaphragm.

Hydraulic Diaphragm Type

The Hydraulic Diaphragm Type utilizes operating oil, such as silicone, in the cavity between the diaphragm and the piston. It features an embedded relief (safety) mechanism and is particularly effective for fluids that should not come into contact with the open air.

This High-Precision Type ensures a constant volume discharge, even in the presence of pressure fluctuations on the injection side. It is commonly employed in high-pressure applications, such as petrochemical processing, as it can handle higher pressures compared to the Direct Drive Diaphragm Type or the Double Diaphragm Type.

Hydraulic Double Diaphragm Type

Similar to the Double Diaphragm Type, the Hydraulic Double Diaphragm Type shares many features with the Hydraulic Diaphragm Type. It includes an additional diaphragm and eliminates the need for a bulkhead inside the pump chamber on the fluid transfer side. This design is suitable for metering injection in high-pressure lines, particularly for high viscosity fluids or slurries.

Plunger Type

The Plunger Type operates by transferring fluid through volume displacement inside the cylinder using the reciprocating motion of the plunger. It is capable of high-precision, high-pressure injection without being affected by pressure fluctuations.

The Plunger Type is an excellent choice for applications that demand precise and high-pressure fluid transfer.