What is the structure of the planger pump and the benefits of Dispenser?

Planger pumps are an important facility used in many industries. In this section, we will explain in detail the mechanism, type, scope of application, maintenance, etc.

What is a planger pump?

Planger pumps have a mechanism to quantitatively push liquids using piston-like parts called plangers, and can suction and discharge liquids. It is used in a wide range of industrial applications, including the injection of chemicals, the transportation of oil, and the processing of Food.

Structure and structure of planger pump

The planger pump transports the liquid by the planger round-trip motion within the cylinder. When the planger retreats, the liquid is inhaled (Filling) into the cylinder, and as it moves forward, the liquid is discharged.



For example, a planger pump used in water treatment facilities plays a role in pushing the water inside the cylinder to high pressure with the movement of the planger and sending it to the process of purifying sewage. The high pressure generated by the piston movement enables efficient liquid transfer and purification treatment.

Benefits of Planger Pump

The planger pump is very accurate because it manages the discharge volume in the cylinder volume. Since the liquid is pushed out at high pressure, the discharge speed is also high. On the other hand, because it is a simple mechanism, it has the advantage of being easy to maintain and high durability.

　◎　High discharge accuracy
　◎　The discharge speed is fast
　◎　Easy maintenance
　◎　High durability

Type of planger pump

１） High-pressure planger pump

Planger pump with increased pressure with special structure. High-pressure cleaning equipment and water cutters use high-pressure planger pumps to generate strong water flow, remove dirt, and cut hard materials such as metals.

２） Low pressure planger pump

For high-pressure planger pumps for functions such as cleaning and cutting, those used in processes intended to supply liquids are distinguished from low-pressure planger pumps. Low pressure planger pumps are suitable for cooling water supply systems and agricultural irrigation. Cooling water supply systems provide a large amount of water with a planger pump for efficient cooling of industrial processes and large machinery. In agricultural irrigation, a large amount of water is supplied evenly with a planger pump to water a wide range of fields.

Musashi Engineering Planger Pump

The Company manufactures JUSTROPUMP, a low-pressure planger pump aimed at quantitative discharge and supplying liquids. Planger pumps are used primarily in the Filling process in the food industry and in the Industry electronic components.

・Precision and quantitative discharge of low viscosity liquid materials
・High-speed dispensing by high cycle speed.

How to choose a planger pump

１） Check the liquid material and the contact material

We propose the material of the pump body and the material of the O-ring according to the liquid material used. If there are concerns about chemical resistance, etc., Please feel free to cuntact us.

２） Check the amount of Filling

Check the minimum discharge and maximum discharge that you want to cover with a single pump. The volume exceeding the capacity of the pump cannot be discharged in a single suction, but the larger the pump is, the more the resolution of the discharge becomes. We have a lineup of 2 types, 5 mL and 13 mL, but we can produce up to 250 mL size.

３） Select the drive method

Planger driving is the cheapest and most common in air drive. The planger operates by switching the air ON / OFF according to the timing of suction and discharge.

Refer to the dedicated pump controller ME-5000P

 

In the case of air drive, the discharge amount and discharge rate are adjusted by opening and closing the micrometer or speed controller attached to the pump body. Therefore, if the amount of Filling varies frequently depending on the application or variety, it is recommended to use a motor to control the volume inside the pump. We also sell motor-driven products on a custom order basis.

Demerits of planger pumps

１） The adaptable material viscosity range is narrow

The planger pump is not suitable for transporting medium to high viscosity liquid materials because it sucks liquid at the negative pressure generated in the cylinder due to the movement of the planger.

２） The operating speed of the planger cannot be controlled.

The operating speed of the planger affects the discharge time. An air-driven planger pump can be adjusted to shorten or extend the discharge time overall, but the speed of movement during strokes from the start to the end of the planger movement is not constant. Consequently, even though the amount of liquid that the pump finally exhales, it cannot be used for applications such as Line dispensing at a constant speed for a certain period of time.

３） Filling and discharge are always set once at a time.

As a general rule, the amount filled at one time will not be accurate unless all of the planger pumps are discharged at once. It is not possible to stop halfway to discharge or change the amount of discharge halfway.

Dispenser, a planger pump type

Our Dispenser and MPP series apply planger pumps to Dispenser to ensure superior durability and high-precision discharge in response to changes in the viscosity of liquid materials. In addition, we have resolved the disadvantages of the planger pumps mentioned above.

１） A wide range of adaptable material viscosity

Since the liquid material is pressurized, materials with high viscosity that cannot be inhaled with a normal planger pump can also be discharged from Filling. As a result, it can be used for quantitative discharge of liquid materials such as adhesives and greases.

２） The operating speed of the planger can be controlled.

The planger is motor-driven and capable of discharge operation at a constant speed, so it can also be used for Line dispensing and percussion applications of adhesives. It is possible to manage the discharge speed optimally without changing the discharge amount.

３） The amount of Filling and discharge can be set separately.

The motor's stroke volume (vomit) and speed can be stored up to 400CH, allowing the liquid material filled in a single operation to be arbitrarily split and discharged. As a result, it is possible to automatically apply multiple patterns to a single workpiece.



Our MPP series is a volume measurement digital control Dispenser that accurately quantitatively discharges liquids with varying viscosity. In addition to being able to set the discharge volume by volume and weight, it also boasts excellent durability due to its unique planger method.

MPP-5-S for precision application and MPP-5-M for large-capacity discharge contribute to the stability and improvement of application processes in a wide range of fields.

 

・The discharge amount can be set by volume and weight.
・Excellent durability with proprietary planner method

 

・Digital Dispenser, which is 10 times larger than the previous year.
・The head can be selected according to the pump size lineup.