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En Ok Pool Reform within Swimming pool water treatment On this page we carry out a precise study of: Peristaltic dosing pump for precise dosing of chemicals In swimming pools, in turn we will show you different models available with different flow rates/pressures to adapt to each need.
What is a dosing pump
Una dosing pump It is responsible for injecting a fluid in small quantities with precise control of the dosed volume. A bomb This type must guarantee the same result in measurements made by different operators over time.
As we already know, metering pumps are optimal when it comes to injecting a chemical or fluid with precision.
In addition to this, they are suitable for handling high pressures and low flow rates.
Metering pumps are widely used in various industries, among them: oil and gas, chemical industry, cosmetics, pharmaceutical, food and beverage industries.
On some occasions, pumps must be installed in classified areas, for this reason there are ATEX type pumps that comply with the standards established for working in potentially explosive atmospheres.
Types of dosing pumps
Some of the pumps have automatic flow control which can be done by means of a frequency converter or by varying the stroke of the pump.
And, depending on the fluid and operating pressure, the pump head can be made of one material or another. The most common are: Polypropylene, PVC, stainless steel, PVDF, among others.
There are two specific types of metering pumps: diaphragm pumps and peristaltic pumps.
Both types of metering pumps will typically provide many years of reliable and efficient use. When deciding which one to use, you need to know how each type works and what the maintenance will be to make the best decision for your needs.
What are peristaltic dosing pumps?
- Peristaltic pumps, also known as hose pumps, It is the hydraulic type element which allows the displacement of different types of fluids. These fluids are contained in a flexible “C”-shaped tube inside the cover.
What are diaphragm pumps
- The membrane pump or diaphragm pump It is a type of positive displacement pump, generally alternative, in which the increase in pressure is carried out by the push of elastic walls - membranes or diaphragms - that vary the volume of the chamber, increasing and decreasing it alternately.
What is a peristaltic pump
What is a peristaltic dosing pump?
Peristaltic pump what is it
A peristaltic pump is a type of self-priming hydraulic pump that achieves pumping action for a variety of fluids by moving a system of rollers against a flexible tube. In this way, pumped fluids contained within a flexible tube within a circular pump casing are never exposed to air by the moving mechanical parts and the roller design prevents siphoning by providing a constant seal in the pump tube. pumping.
Peristalsis process: How the peristaltic pump pumps fluids
A peristaltic pump is a type of hydraulic pump used to pump a variety of fluids.
- The fluid is contained within a flexible tube within a circular pump casing.
- . A rotor with a number of rollers, shoes or wipers attached to the outer circumference compresses the tube.
- As the rotor turns, the part of the tube under compression closes, forcing pumped fluid to move through the tube.
- Furthermore, as the tube is reopened, flow is induced into the pump, this process is known as peristalsis.
What is the pool pH regulator?
If you are interested in the pH meter for swimming pools, that is, with the device that automatically controls and regulates the pH (which is the acidity of the pool) contact uss and let us advise you.
What is ph: Coefficient that indicates the degree of acidity or basicity of water.
With the automatic pool pH meter: PLet's finish How to raise pool pH / pH under pool.
It must be kept in mind that: without the proper pH balance, the disinfection of the water will be zero, applying disinfectant treatment will be of no use.
How the automatic pH regulator for swimming pools works
The device is autonomous and when the probe detects that the pH parameter is incorrect, it injects liquid contained in a bottle (liquid pH correctors).
Treatments compatible with the pool pH regulator:
any type of treatment (salt, chlorine, oxygen...).
What we will get with the pool ph regulator
- Autonomy: The pH regulator has an automatic ignition system.
- Convenience: Reduction of maintenance operations
- Accuracy in water parameters: Visual pool status indicator
- Optimal and constant control: controlled pH values, since they are very unstable for multiple reasons.
- Clean and crystal clear water, without color change.
- We will avoid algae and dirt
- Decreased filtration time
- Savings on chemicals
- We will avoid damaging the pool liner, since acidic water damages it.
Automatic pH controller
This video demonstrates how the automatic pH regulator is capable of detecting when the PH of the water needs to be modified and, using a pump, pouring the necessary solution to establish the appropriate value.
What is peristaltic dosing pump used for?
What is the peristaltic dosing pump used for?
Easy to set up and maintain, peristaltic pumps are ideal for handling abrasive fluids and shear-sensitive fluids in a variety of applications.
Peristaltic pumps are also known as tube pumps or roller pumps. They provide a reliable and simple solution for moving almost any fluid in a wide variety of markets and applications.
Peristaltic pumps can transfer, dose or meter a variety of fluids, including cosmetic lotions, abrasive slurries or sodium hypochlorite.
Peristaltic pumps offer a flexible solution for chemical processing, wastewater applications, food beverages and much more. When combined with variable speed drives or a PLC, pump flow can be adjusted to precisely meter or dose fluids.
At the core of the pump is an elastomeric hose or tube that contains the fluid, virtually eliminating the possibility of product contamination. Albin Pump manufactures a variety of hose materials to meet the chemical compatibility required in each application.
Where are peristaltic pumps used?
If we want to dose fluids or liquid pastes with great precision, peristaltic pumps are the ideal element.
Perfect for multiple applications and used in numerous industrial processes, the operation of a peristaltic pump It moves fluids through a movement similar to that of our digestive system. That is why they are called peristaltic, and we are going to tell you what they are and how they work.
La definition of a peristaltic pump It can be made as an electrical element used for pumping liquids, fluids or pastes, whose operating principle is carried out through the compression and decompression of a tube or hose, to facilitate the movement of the fluid through it.
Unlike other types of pumps, They can function without containing fluids inside them, since they do not need any refrigeration. At the same time, they must be located at the lower level of the liquid to be pumped and are perfect for pumping all types of liquids and liquefied pastes.
How a peristaltic pump works
Peristaltic pump
Peristaltic pump with continuous regulation (from 10 to 100%) of the flow.
This regulation is obtained by varying the speed of the motor through a potentiometer placed on the front panel of the pump.
El operation of a peristaltic pump, having a volumetric character, are perfect for obtaining great precision when pumping and dosing fluids. For this reason, they are used in sectors as different as food, chemical, pharmaceutical and widely used in wastewater purification systems.
Peristaltic metering pump dimensions
Technical characteristics
- • Equipment produced in accordance with the law
- • Polypropylene box.
- • Standard power supply: 90 ÷ 260 Vac 50-60 Hz
- • On request provision for level probe (excluding level probe).
How a peristaltic pump works
The operation of a peristaltic pump is based on the principle of peristalsis
Peristalsis is a phenomenon that consists of the contraction and relaxation of a tube, producing the movement of a particle inside (just as our digestive tube works).
A peristaltic pump is composed of an electric motor, a C-shaped elastic tube or hose, which connects the inlet and outlet of the pump body, a rotor composed of two or more rotating skates or rollers, and an outer cylinder. that rises and falls in the direction of the longitudinal axis of the pump body.
When the pump is running, the rollers rotate on the peristaltic pump hose and pressure from the first roller is produced on the tube, creating a depression that produces such a suction of the fluid that it propels it towards the outlet of the pump. When the drive is created, it is the second roller that starts the operation again.
To understand this phenomenon, we can imagine a toothpaste tube and the compression we perform on it to move the toothpaste towards the outlet. This is what the pump rollers actually do, they press the hose, thus producing the movement of fluid toward the pump outlet.
What is peristaltic hose
La peristaltic hose, or the tube, is the only component of the pump that is in contact with the fluid and must be compatible with it, having the necessary mechanical conditions to be able to resist the compression and friction movements that are continually being carried out on it. It is usually completely elastic to allow for deformation and is made of PVC or silicone-like materials.
As for the rollers, depending on the flow to be driven, there will be 2 in those models that maximize a flow, or more can be installed depending on what we want to minimize the pulsations of the driven fluid.
Principles of operation of peristaltic pump
- The pump hose is compressed successively by two pressure shoes that are located on a rotating wheel. The first shoe, by pressing on the walls of the hose, creates a vacuum and draws the pumped liquid into the hose.
- Once the pumped liquid has entered the hose, the second roller passes over the hose and pushes the liquid towards the pump outlet.
- When the shoe on the discharge side is separated from the hose, the opposite shoe is already in compression, thus preventing any backflow.
- The pumped fluid is successfully introduced and expelled due to the rotation of the wheel.
Benefits of the peristaltic pump
Advantages of the peristaltic pump
PROS of the peristaltic pump
- To start, name that Peristaltic pumps are easy to set up, operate and maintain without specialized training. These pumps do not require compressed air nor do they depend on valves not clogging. The peristaltic pumping action is ideal for handling abrasive and shear-sensitive fluids.
- Sealless design:Peristaltic pumps do not have seals, which prevents problems such as leaks of corrosive chemicals and ongoing maintenance.
- Low maintenance costs: Peristaltic pumps have fewer mechanical parts than other pump technologies, which reduces the service required due to wear and tear on parts, and their lack of valves, seals and stuffing boxes makes them economical to maintain. Actually, the only spare part is the hose or tube, a relatively low cost item that can be easily changed in a short time.
- Additionally, the only part of the pump in contact with the fluid being pumped is the inside of the tube or hose, which facilitates sterilization and cleaning of the internal surfaces of the pump.
- Dry running and self-priming: Peristaltic pumps do not require the pumped fluid to be continuously present; Pumps can run dry, without downtime or costly repairs. Hose or tube recovery creates a powerful self-priming action and allows pumps to move liquids that contain trapped air or can release gases.
- Gentle pumping action: Peristaltic pumps have a smooth, low-shear pumping action, ideal for shear-sensitive products including flocculants and broths.
- Althigh suction ure: The powerful suction provided by the recovery of a reinforced hose gives the hose pumps suction lift capabilities of up to 9,5 m of water.
- Abrasion resistant: Hose life is not related to the abrasive qualities of a product. The hose only fails due to fatigue or chemical action.
- Solids handling: Verderflex hose pumps can pump sludge containing up to 80% inorganic solids or 15% organic sludge.
- Reversible: Peristaltic pumps are reversible and can be used to empty lines or clear blockages No Slip The pumps have no internal backflow, providing precise dosing without slipping.
- And finally, it is worth mentioning that the dosage is precise: The pumps are precise in dosing; They have a repeatability of ±1% and measurement capabilities of ±5%.
Advantages of duplex industrial peristaltic pumps
Industrial peristaltic pumps offer numerous benefits compared to other pumping systems:
- They spin without limit dry
- They are reversible
- They are very self-priming
- They perfectly resist abrasion
- They work with chemical products, corrosives, solids, abrasives, products with gases...
- They offer excellent dosing precision
- Accepts very viscous fluids
- They do not have valves or mechanical closures.
- What is a dosing pump
- What is a peristaltic pump
- What is peristaltic dosing pump used for?
- How a peristaltic pump works
- Benefits of the peristaltic pump
- What are the different types of peristaltic pumps?
- Buy peristaltic pool pump
- Peristaltic pump useful life
- How to install dosing pumps
- Pool peristaltic dosing pump maintenance
- Most common breakdowns in the pool peristaltic pump
What are the different types of peristaltic pumps?
Industrial peristaltic pumps
What is an industrial peristaltic pump
La peristaltic pump It is a type of positive displacement pump that advances fluid by compressing a flexible tube or hose similar to our digestive system. The fluid is sucked in by the compression of the hose and displaced by the passage of the roller or shoe.
Duplex Peristaltic Pump Details
Duplex pumps are equipped with two hydraulic heads coupled to a motor. This type of pump has some important features compared to other assemblies, for example;
- They double the pumping capacity without increasing the rotation speed
- They can pump the same product or different products separately into two different channels.
- Very compact version with direct coupling and vertical mounting
- Very robust design thanks to the inclusion of the bearing box
- This design undoubtedly allows us to achieve maximum flow rates of up to 50 m3/h without using a pump with dimensions beyond what is acceptable to maintain correct, fast and simple maintenance, which in the end allows us to have very controlled and reduced associated costs. .
Pressure-dependent peristaltic pumps
What are pressure-dependent peristaltic pumps used for?
This type of pumps are used in different types of fluids such as:
- Composite fluids: ground fruit, olive pomace, paper pulp, polymers or resins with quartz, etc.
- Fluids sensitive and fragile to cutting: They can be fruit salads, purees, emulsions, fruit juices, eggs, cosmetics, vegetable oils, etc.
- Corrosive and abrasive fluids: Such as mud, sediments, inks, cements, pygmies, fertilizers, hydrocarbons...
High pressure peristaltic pump
- All the high pressure peristaltic pumps They can operate with up to 16 bar and are commonly called “hose pumps”, since that is what the reinforced tubes included in them are called. In addition, the covers are prepared with lubricant to avoid scorching the outside of the tube and dissipate heat.
Low pressure peristaltic pump
- All the low pressure peristaltic pumps They use rollers and do not have reinforced tubes, which is why they are often known as “tube pumps.”
- In addition, they have dry covers, unlike high-pressure peristaltic covers, which use lubricant to prevent scorching.
Buy peristaltic pool pump
How to choose a dosing pump for swimming pools?
To select a dosing pump, the following aspects must be considered:
- Required capacity: required capacity in terms of the required injection flow rate (l/hr).
- Hydraulic calculation: determine the pressure that the pump must overcome.
- Pump material: required resistance against working flow (corrosion, erosion, viscosity, etc.).
Next, in this section you can buy a peristaltic dosing pump for the precise dosing of chemicals in swimming pools.
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Peristaltic pump useful life
How long do peristaltic pumps last?
Actual useful life peristaltic dosing pump
Most manufacturers estimate the useful life of a peristaltic metering pump at 4-8 years.
What does the duration of the peristaltic dosing machine depend on?
- Actual peristaltic pump life may vary depending on environment, liquid, flow rate, etc.
- Additionally, because they are highly customizable from tube material to roller size, it is difficult to pin down the lifespan of each pump or tube.
Useful life of flexible tube peristaltic dosing pump
As a general rule, sIt is recommended to create a preventive maintenance plan to check the hose every 200 to 1000 hours depending on the severity of the pump environment.
Durability flexible tube peristaltic pool pump
- For typical water quality applications, flexible tubing life should last well over 1000 hours of operation.
- However, for corrosive experiments with acidic pH or abrasive slurries, be sure to check the tubing closer to the 200 hour mark.
How to install dosing pumps
Installation Safety Tips
Installation and operation of dosing pumps.
- Installation should only be performed by a qualified technician, many subsequent system problems are the result of improper installation.
- It is necessary that the electric motor has overcurrent protection, regardless of the thermomagnetic or blade switch.
- Check the magnitude of power required by the electric motor to avoid voltage drops when connecting the dosing pump.
- The electrical installation must be done with conductors of adequate diameter, which depends on the power of the motor and the distance at which the transformer is located.
- All electric motors leave the plant ready to connect to the specified voltage. If a change in the voltage connection is required, check the motor plate for the new connection.
- Never run the metering pump dry as this may cause mechanical damage.
- Respect the manufacturer's specifications and technical recommendations. Do not use a pump for any purpose other than its intended purpose.
It is recommended to use the following safety implements for the installation of a dosing pump:
- Overalls or fire-retardant shirt and pants.
- Leather or cowhide gloves.
- Safety helmet.
- Have some communications equipment agreed upon with the boss in charge of the power line.
- Safety shoes with non-slip soles without steel point.
- Cup-type hearing protectors or similar.
- Lumbar protector.
- Safety glasses.
Astralpool peristaltic dosing pump installation
Diagram of a typical installation for a peristaltic dosing pump
- A) Union joint
- B) Power plug
- C) Filter
- D) Tank with additive
Peristaltic dosing pump installation procedure
- Install the pump away from heat sources, in a dry place with a maximum ambient temperature of 40°C while the minimum operating temperature depends on the liquid to be dosed, which must always remain in a fluid state.
- Respect the regulations in force in the different countries regarding electrical installation. If the power cable is not equipped with an electrical plug, the equipment must be connected to the power network using an all-pole isolating switch that has a minimum distance. between the contacts 3 mm. Before accessing the connecting devices all circuits must be interrupted.
- Locate the pump as indicated in figure 4, keeping in mind that it can be fixed, both below and above the level of the liquid to be dosed within the maximum limit of 2 meters. The injection point must always be placed higher than the liquid to be injected.
- In the case of liquids that give off aggressive vapors, do not install the pump on the tank, unless the tank is hermetically closed.
- Insert the tubes fully with their corresponding conical fittings and lock them with their ferrules to secure them.
- Before fixing the delivery pipe to the installation, prime the dosing pump, as indicated in the sequence. In case of difficulty priming the pump, aspirate from the delivery connection with a normal syringe and with the pump running, until the liquid is seen rising in the syringe or delivery tube. For the delivery connection-syringe connection, use a piece of aspiration tube.
- Avoid useless curves, both in the delivery pipe and in the suction pipe.
- Apply a steel fitting with a 3/8″ female gas thread in the installation duct to be treated, at the most appropriate point to inject the product to be dosed. This splice is not included in the supply. Screw the injection valve into the fitting, using Teflon as a gasket (Fig. 8), connect the tube to the conical fitting of the injection valve, and secure it with the ferrule G. The injection valve is, in turn, a check valve. .
Injection valve assembly diagram
Installation of the injection valve of the pool peristaltic pump
- A – Installation to be treated
- B – Valve pusher
- C – Polypropylene gasket
- D – Lip valve
- E – Double threaded 3/8” gas joint
- G – Pipe fixing flange
- M – Conical plug for the tube
- N – 3/8” female gas joint
- T – Polypropylene tube
Start-up of the pool peristaltic pump
Dosing of harmful and/or toxic liquids
To avoid damage to people or things resulting from contact with harmful liquids or inhalation of toxic vapors, as well as in compliance with the instructions contained in this leaflet, the following rules must be taken into account.
- Operate according to the manufacturer's recommendations of the liquid to be used.
- Check that the hydraulic part of the pump is not damaged or broken and use the pump only if it is in perfect condition.
- Use tubes suitable for the liquid and the operating conditions of the system, introducing, if necessary, internal PVC protective tubes.
- Before deactivating the dosing pump, the hydraulic part must be neutralized with a suitable reagent
Disassembly of the pool peristaltic pump
How to disassemble the pool peristaltic pump
For the possible disassembly of the pump or in any case before carrying out interventions on it, it is necessary:
1. Make sure that it is electrically disabled (both polarities) by disconnecting the conductors from the mains contact points through the opening of the omnipolar switch with a minimum distance between the contacts of mm 3 (Fig. 4).
2. Eliminate in the most appropriate way (with the utmost attention) the pressure existing in the delivery tube
Pool peristaltic dosing pump maintenance
How to prime the pool peristaltic dosing pump
Priming the metering pump
Tutorial of the pump priming operation in the process of putting into use and maintenance work of the PRIM RX EVOLUTION dosing pump
How to prevent the pool dosing peristaltic pump
Care of the peristaltic pool dispenser
- Periodically check the level of the tank containing the solution to be dosed, to prevent the pump from running empty; Although in this case the equipment does not suffer any damage, it is advisable to carry out this control to avoid damage caused by the lack of additive in the installation.
- Check at least every 6 months the operation of the pump, the tightness of the screws and gaskets, for particularly aggressive liquids carry out even more frequent checks, in particular check the concentration of the installation additive; A reduction in said concentration could be caused by wear of the crushing tube (which in this case must be replaced).
- The firm recommends periodically cleaning the hydraulic part (valves and filter). It is not possible to say what is the time interval in which said cleaning should be carried out, because it depends on the type of application. You can't even say what type of reagent should be used, since it depends on the additive used.
- The pump hose or tube weakens over time until it degrades, and the flow rate decreases over time due to constant compression (this is called fatigue). It's not just the hose and feed rate that decreases over time, but also the pump motor. The motor of a peristaltic pump is constantly under a load that uses more power and consumes more energy.
- The fatigue aspect of pump hoses means that there is always a chance that the hose will leak or break. To help prevent this from happening, manufacturers rate hoses for a specific number of hours they should be used. Be sure not to overestimate the life of the hoses, as this could increase the risk of leaks or ruptures.
How to preserve the pool peristaltic pump if we use sodium hypochlorite
Take care of the peristaltic dosing pump using sodium hypochlorite
Considering all of the above, we can suggest how to intervene if the pump works with sodium hypochlorite (the most common case):
- Check that it is electrically deactivated (for both polarities), disconnecting the conductors from the mains contact points through an omnipolar switch with a minimum distance between the contacts of 3 mm.
- esconnect the delivery pipe of the installation.
- Remove the suction tube (with filter) from the pond and immerse it in clean water.
- Feed the dosing pump and run it with water for 5 – 10 minutes.
- With the pump disconnected, immerse the filter in a hydrochloric acid solution and wait for the acid to finish its cleaning action.
- Power the pump again, running it with hydrochloric acid for 5 minutes, making a closed circle with suction and delivery submerged in the same pond.
- Repeat the operation with water.
- Connect the dosing pump to the installation again.
Clean the hydraulic part of the pool peristaltic pump
The manufacturer recommends periodically cleaning the hydraulic part (valves and filter)
It is not possible to establish the time intervals within which to carry it out because it depends on the type of application, or even what reagent to use because it depends on the additive used.
Procedure to clean the hydraulic part of the pool peristaltic pump
- Ensure that it is electrically deactivated (both polarities) by disconnecting the conductors from the mains contact points through an omnipolar switch with a minimum distance between the contacts of mm 3.
- Disconnect the delivery line from the system
- Remove the suction tube (with filter) from the tank and immerse it in clean water
- Turn on the dosing pump and let it run with water for 5 – 10 minutes
- And, with the pump off, immerse the filter in a hydrochloric acid solution and wait for the acid to finish its cleaning action.
- Turn the pump back on by running it with hydrochloric acid for 5 minutes creating a closed circle (with suction and delivery submerged in the same container) g. repeat the operation with water
- Reconnect the dosing pump to the system.
Most common breakdowns in the pool peristaltic pump
Mechanical breakdowns peristaltic dosing pump
First of all, emphasize that Thanks to the fact that the system is very robust, no real mechanical breakdowns occur in the peristaltic dosing pump. of swimming pools.
Liquid losses in the peristaltic dosing pump
- In some circumstances fluid leaks may occur due to a splice or ferrule to fix loose tubes, or more simply due to the breakage of the crush tube.
- In these cases the components must be replaced.
- Once the leak has been eliminated, it is necessary to clean the dosing pump, eliminating possible additive residues, which, when stagnant, could chemically attack the pump case.
Mechanical breakdowns in the peristaltic dosing pump: the switch is ON, that is, the green LED is on and the pump rotates but does not introduce the additive into the installation.
- Check the crushing, suction and delivery pipe. If expansion is noted in said tubes, check the corresponding table for compatibility of the additive with the type of tubes installed in the pump.
- Check the clogging status of the filter and check valve.
- Check the condition of the injection valve.
Electrical breakdowns in the peristaltic dispenser
❶ Switch ON (green LED OFF) = the pump does not rotate
- Check the regularity of the power supply (socket, plug).
- If the pump remains inactive, a professional should be called.
❷ Switch ON (green LED ON) = the pump does not rotate
- Check the position of the flow regulation knob.
- If by changing the regulation the pump continues without turning, a professional should be called.
Attention when removing the dosing pump from the installation: Be careful when removing the tube from the delivery connection, because the residual additive contained in the tube may escape. Also in this case, if the box comes into contact with the additive, it must be cleaned.
For this reason, we invite you to visit Boyser Pump, experts in industrial peristaltic pumps for applications in responsibility, reliability and precision services.