Many different types of businesses rely on dosage pumps. Anyone in the pulp and paper, electroplating, water treatment, and mining industries can use these. A dosing pump serves multiple purposes, even in the medical pharmaceutical sector. Even for relatively basic chemical reactions, like changing the chlorine or pH level in pool water, the fundamental goal of utilizing a dosing pump is to induce flow and reaction in a body of fluids.
Although acids are commonly introduced into water to initiate chemical reactions, you can also use flocculants. This will ensure that sediments sink to the bottom. Additionally, flocculating substances can alter the water’s chemical makeup, rendering it acceptable for consumption. However, dosing is useful in making a wide range of products and is not limited to altering water’s properties.
Although a dosing pump is useful for biocides, corrosion inhibitors, metering fluids, and high-temperature and high-pressure fluids like boiler feed, they often require component changes during manufacturing. For example, they switch from low-quality plastic dosing pipes to stainless steel, aluminum, or polypropylene.
Important features: The pump’s structure
The three components of the pump are the cylinder block, the transmission box, and the motor.
The transmission box comprises a crank connecting rod, stroke-regulating, and turbine worm mechanisms. One has to turn the adjusting hand wheel to alter the plunger (piston) stroke. This will apply a high adjustment stroke, which changes the eccentricity of the moving shaft.
The packing seals, discharge valve group, pump head, plunger, and suction valve group form the cylinder body.
The working principle
The rotation of the eccentric wheel and spindle is due to the motor driving the worm through the coupling and decelerating the worm gear. The eccentric wheel drives the bow connection rod’s sliding adjustment seat. This allows for reciprocating motion. Inhalation of liquid occurs when the plunger slowly returns to the dead point, creating a vacuum in the pump chamber. Expulsion of fluid occurs when the plunger advances toward the dead point, closing the suction valve and opening the discharge valve. The liquid is continuously and quantitatively discharged via the pump’s reciprocating.
Flow control
You can vary the pump’s flow size by turning the hand wheel, which drives the adjustment screw. This changes the distance between the bow-type connecting rod, which changes the plunger’s (piston’s) movement within the pump chamber. With a precision of 95%, you can adjust the handwheel’s scale to find the plunger stroke.
The characteristics of the pump
The pump is highly efficient; for example, it precisely measures and transports fluids, does not leak, and has excellent safety features. Additionally, it allows for random selection of flow from zero to a maximum value range and pressure from normal to an allowable range.
There is no noise, the operation is smooth, the volume is small and easy to maintain, and the weight is light. Additionally, you can use it in parallel with no problems whatsoever.
Considerations before dosing pump installation
You may be dealing with hazardous chemicals throughout the dosage process. For this reason, you must follow all necessary safety procedures before handling any substances involving high temperatures or pressure. When not handled properly, there is a high chance of operator error, pumping inaccuracies, leakage, and major accidents.
Prior to commencing any chemical dosing procedure, you must refer to the product specification and manual provided by the manufacturer. Feel free to ask for assistance if you have any questions or are stuck. Express Drainage Solutions is the company you call if you need help with dosing pump installation.
Prioritizing safety at all times
- Before you install a product, make sure you read the instructions and specifications carefully.
- Environment: Which location will you be carrying out the dosing pump installation? What else is near?
- Think about safeguards for storage.
- Personal protective equipment is essential for operators and anyone in the immediate vicinity.
- Are the chemicals you’ll use compatible with your work? Consider their corrosiveness, toxicity, and other properties.
Installing Dosing Pumps
Exceptional precision
Installing the parts correctly is crucial for the best results when using dosing pumps. This is because they can work with a high level of precision. To avoid corrosion or accidents, ensure that the metered chemical is completely compatible with the dosing pumps and all their parts, including holding tanks.
Specialized parts
For the majority of dosing pumps, specialized components are necessary for the dosing of chemicals with extremely high corrosiveness, pressures, or temperatures. For instance, to facilitate replacement or disinfection for repeated use, the medical sector makes use of flexible plastic dosing pipes.
Locate the installation area
Due to the potential for heat buildup or corrosive chemical accumulation, which could harm nearby structures and equipment, it is important to locate the pump and its components before dosing pump installation. Installing the dosing pump too close to the water meter is a typical error that leads to sludge accumulation and rust in a relatively short time.
In order to avoid siphoning, the pump should be set below the dosage point and adjacent to the compressed air line. Additionally, this prevents sunlight and other harsh weather conditions from harming the pump. These can eventually shatter the outer layer of the metering system.
It is best to store dosing pumps in a protective shed or dedicated cabinet, even though they are often corrosion-resistant.
Product container
An additional critical issue is the product container or holding tank. If the bulk containers are backup stock or will only be used for a short time, store them away from the site. The precise location of storage is irrelevant if bulk handling equipment is readily available. Be careful not to overhandle chemicals that require instant and constant usage and have a short shelf life. Store these close to the dosing pump.
Best place to put a dosing pump
Dosing pump installation on a wall is often a fast and simple process. While the majority of manufacturers provide detailed instructions to help with installation, a few opt for a more hands-on approach by providing dosing pump installation videos to show how to fit the system.
But, on occasion, minor problems may emerge during dosing pump installation that can affect the system’s ultimate performance. If the installer is aware of what to look for, they can usually easily fix these minor problems.
Tips for your dosing pump installation
- Install a back-pressure valve at the pressure side’s terminal. This ensures the pump receives the correct pressure for precise dosing and stops fluid from reentering the system.
- Supply a short hose for suctioning. No suction height greater than one meter is allowed for pumps that include automated air vent valves.
- Make sure your suction hose is straight and free of airlocks or joints.
- Gas-containing liquids should have a positive inlet installed.
- Make sure not to run dry.
- Put a valve in the suction line if the pump has a positive inlet.
- Replacing the pallet tank before running out ensures the dosing system doesn’t contain gas or air. It is best to use a suction pipe that has a level switch.
- Put a pressure gauge on the pump’s pressure side and, if needed, a pulsation dampener on the same side to prevent pulses.
- Get the pump near the pallet tank.
- Degassing is necessary for removing air and gas from the tubing and pump. Putting gas in the pump will not get it to work normally.
Conclusion
To maintain the safe disinfection of drinking water, it is important to use motor-driven, peristaltic, solenoid metering pumps selectively for their particular applications. This will allow for the proper chemical supply. Remote monitoring, special applications, or further control for various purposes is possible with advanced instrumentation options.