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What is a Dosing Pump?

A Dosing Pump is a type of Positive Displacement Pump offering low flow rates, high accuracy and control for repeatable product dosing. When fluid enters a dosing pump, a selected amount of product will enter the pump chamber and disperse one chemical fluid into another such as water to allow the dosing to take place.

They are also referred to as metering pumps and are typically used for chemical or pharmaceutical applications but their versatility means they can be used in almost any industry. There are a variety of pump ranges that are classified as dosing pumps including Diaphragm pumps, peristaltic pumps and Lobe pumps being the most common on the market.

How Does a Dosing Pump Work?

Dosing Pumps are generally operated either manually, digitally or through analogue signal feedback from fluid accessories on the system such as flow meters or sensors. They are also becoming more frequently controlled by a signal from a central control system such as SCADA where operators can monitor and control their process systems from a central control room.

Applications for Dosing Pumps

Dosing Pumps can be used for a plethora of applications in almost every industry, below are some examples of where Tapflo&#;s range of Dosing Pumps can be used:

• Water Treatment Industries: Legionella Control, Disinfection, & pH Correction
• Leisure Industries: pH Correction & Dosing, Chlorine Dosing (Redox or Free Chlorine-based) & PAC or Flocculant Dosing
• Industrial Process Industries: CIP (Clean in Place), Waste Water Treatment, Biocides (Such as Sodium Hypochlorite, Sodium Bromide & Isothiazalone), Corrosion &#; Inhibitors & Descalers for Cooling Towers, Pipework, Valve and Pump Systems
• Food, Beverage & Dairy Industries: CIP, Flavourings & Additives
• Poultry & Farming Industries: Transfer a variety of chemicals, such as hydrogen peroxide, and additives into water supplies to ensure the welfare of livestock.
• Agricultural Industries: Irrigation, Chemigation & Fertigation utilising chemicals such as Nitric Acid
• Wash Down Applications: Pumping of various detergents & waxes in vehicle wash applications for example

Benefits of our Dosing Pump

• High dosing accuracy across a high range of flow rates
• Pulsed, low Pulse or Pulseless Flow
• High Discharge Pressures
• Easy operation
• Robust and reliable product
• The long service life of wear parts
• Low maintenance and operational costs
• Low energy consumption
• Dry running
• High suction lift
• Solids passage
• Leakage free
• Feedback and easy system integration
• Customisation to specific applications
• Various onboard controls and features to make your life easier

Types of Dosing Pumps Available from Tapflo UK

Tapflo offers a comprehensive range of Chemical Dosing Pumps both big and small to satisfy almost any dosing or metering requirement. Typical materials available for Tapflo&#;s range of Dosing Pumps are but are not limited to PP, PVC, PE, PTFE, PVDF, Stainless Steel AISI 316L & Hastelloy C. Take a look below at some of the most common Tapflo pumps ideal for dosing operations.

Peristaltic Pumps:  Our High-Pressure Peristaltic Pump (up to 15 bar) and Low-Pressure Peristaltic Pump (up to 4 bar) with flow rates from as low as 1 l/hr. Hose & insert materials can be catered to almost any application and even the pump casing can be supplied in numerous materials to ensure that even when the hose leaks the pump can be protected from corrosion by the pumped media. Hose leak detection can be provided upon request also.

Low Energy Air-Operated Diaphragm Pumps: Provide consistent, low pulsating flow rates with high volumetric efficiency making them ideal for batching and metering applications. Available in HDPE/PTFE, Metal and Sanitary series of products they can be catered to almost any application.

We can also supply Precision Mag Drive Gear Pumps, Mechanically Sealed Lobe Pumps and Solenoid and Motor-Driven Diaphragm or Piston Pumps with traditional electric motors or stepper motors.

Tapflo&#;s SLES Mixing and Dilution Unit

Tapflo UK&#;s SLES unit is a newer product to the range that was introduced after recognising the expensive cost of buying SLES already diluted for use. Instead of customers buying the product at 27% concentration they can save money by buying it at 70% concentration and diluting the product themselves for the process line. A revolutionary system for companies that use Sodium Laurel Ether Sulfate commonly found in shampoo, shower gel and soap products. This unit uses a Centrifugal pump to mix the SLES concentration with water and fitted with a PLC controller for accurate flow rate and batch control.

Bespoke Dosing Pumps

Tapflo can also supply bespoke or catalogue dosing skids and systems to allow for drop-in solutions with limited on-site integrations and commissioning where time is of the essence.

A variety of accessories such as suction lances, injection nozzles, pulsation dampeners, back pressure & relief valves, tanks, control panels & controllers, probes, flow meters and filters can also be provided on request to make sourcing your dosing equipment easier. We really do have the solution for any application you need dosing!

Our sales team are always happy to help with any pump queries, so don&#;t hesitate to get in touch.

Trash Pump Buyer's Guide

How to Pick the Perfect Trash Pump

Water pumps are meant to pump clear water. But when you introduce debris and other solids to the mix, things can get clogged or damage your pump. That's where trash pumps come in.

They're capable of passing water that other pumps just can't handle. There are many types of water pumps you'll need to choose from, depending on your situation.

In this article, you'll learn about the different types of trash pumps and which applications work best for each.

Electric Submersible Trash Pumps

If you simply need to pump small amounts of greywater around the home with solids in it (like in flooded window wells with sand and leaves), then an electric submersible trash pump may be right for you.

They are as easy to use as attaching the hose and dropping it wherever compact areas you may need it. Just keep in mind that the function of these pumps are extremely limited, so if you need to move large amounts of dirty water with solids involved, we definitely recommend a semi-trash pump or better.

Semi-Trash Pumps

For more Heavy Duty Chemical Centrifugal Pumpinformation, please contact us. We will provide professional answers.

Semi-trash pumps get their name from the fact they can pass small debris, but not much more than that. The pump housing just isn't large enough to pass larger items.
Semi-trash pumps are typically used to pump clean or slightly muddy and sandy water.

The largest items any of our semi-trash pumps can pass is about 5/8 of an inch. You'll want to use a hose with a strainer so the hose doesn't get clogged with any items too big to pass through. The strainer just sifts the debris that the pump can handle and leaves out the stuff that's too big.

Traditional Trash Pumps

Trash pumps are made to handle debris and solids such as leaves, pebbles, and twigs. With larger impeller veins and pump housing, trash pumps can pass solids like those mentioned above.

The pump does not grind these up as they enter the impeller, but leaves them intact and sends them on their way. You'll want to use a hose with a strainer for trash pumps too. In the event the pump does get clogged though, there are easy cleanouts, which you can open up by hand and remove any items too big.

Diaphragm Pumps

Diaphragm pumps work entirely differently than other trash pumps. Instead of using centrifugal force, the pump has a diaphragm that is pushed up and down, creating a vacuum effect.

When the diaphragm goes up, it creates a vacuum, sucking in water. When the diaphragm is pushed down, it ejects the water that was just suctioned into the pump. It essentially acts like a piston in a combustion engine, alternately drawing in and then ejecting out.

Diaphragm pumps are most commonly used to pump sludge and extremely abrasive liquids. A common example would be draining a pond because it can handle the muck and mud on the bottom, as well as the water, leaves, and weeds.

Shop All Diaphragm Trash Pumps

PTO Trash Pumps

PTO trash pumps are beloved by farmers and workers in the agricultural industry because they attach to a tractor's power take-off driveshaft and are powered by the tractor's massive gas engine. They attach quickly, prime in seconds, and are virtually maintenance-free because they don't have an engine of their own.

How to Pick the Perfect PTO Trash Pump

Industrial Trailer-Mounted Trash Pumps

Sometimes you need the power of ten industrial trash pumps in places you can't really carry it to. The natural solution is an industrial-grade, trailer-mounted trash pump. You no longer have to imagine a pump that boasts a 6" inlet size, can pump up to
2,750 GPM (gallons per minute) and can lift that water 150 feet high with these behemoths.

Armed with a venturi dry prime centrifugal pump and a water-cooled, turbo-charged diesel engine, the possibilities are virtually endless with an industrial, top-tier trash pump like these. Don't let the price tag fool you, they're worth every penny for the toughest water pumping applications on construction sites, mining operations, sewer bypass projects, and much more.

Shop All Trailer-Mounted Trash Pumps

By Jim O.

Water Pump Expert

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