A dosing metering pump injects measured amounts of chemicals into water and process lines.
Stroke or speed sets the dose. Therefore, it suits chlorination, boilers and pools.
What is a dosing metering pump?
A positive displacement pump traps a fixed volume of liquid and pushes it to the outlet with each turn or stroke. Gear, lobe, screw and rotary vane pumps turn continuously, while dosing pumps use a diaphragm or plunger.
Flow stays nearly steady as pressure changes. Therefore, these pumps suit thick liquids, accurate dosing and drum transfer, where centrifugal pumps struggle.
Further reading
- Gear pumps (Wikipedia)
- Metering pumps (Wikipedia)
- Pump types and principles (Wikipedia)
Key terms explained
- Viscosity
- How thick a liquid is. Thick liquids suit positive displacement pumps.
- Relief valve
- A valve that protects the pump if the outlet is blocked.
- Shear-sensitive
- Liquids that are damaged by rough pumping, such as some foods.
- Metering
- Delivering a set, measured volume.
Features and benefits
- Handles thick liquids.
- Steady flow at changing pressure.
- Accurate dosing on metering types.
- Self priming on many types.
- Manual options for drums.
Technical specifications
| Product | Dosing metering pump |
|---|---|
| Type | Diaphragm or plunger, confirm with quote |
| Output and pressure | Confirm with quote |
| Supplier | Sparks Plumbing Experts Ltd, Nairobi |
| Supplier | Sparks Plumbing Experts Ltd, Nairobi |
Sizes, grades and ratings depend on stock and model. Tell us what you need, and we will confirm before you order.
Applications of a dosing metering pump
- Fuel and oil transfer. Moves diesel, lube oil and fuel oil.
- Food processing. Moves syrups, creams and sauces.
- Water treatment. Doses chlorine and chemicals.
- Paints and resins. Moves thick coatings.
- Molasses. Transfers molasses in sugar and feed plants.
- Drum emptying. Hand and barrel pumps empty drums.
- Cosmetics. Moves creams gently.
- Boiler dosing. Injects treatment chemicals.
- Swimming pools. Doses chlorine and pH chemicals.
- Workshops. Transfers oils and coolants.
- Agriculture. Injects fertiliser.
- Breweries. Moves yeast and wort.
How to choose and install
- Choose by viscosity, flow and pressure.
- Fit a relief valve on the outlet.
- Never close the outlet with the pump running.
- Choose seals and materials for the liquid.
Why choose Sparks Plumbing Experts
- Pumps sized to your dutyShare your flow, head or borehole data, and we match a pump to it.
- Controls and accessoriesControl boxes, level controls and fittings complete the installation.
- Water, fuel and chemical pumpsOur range covers borehole, transfer, fuel and chemical duties.
- Performance data on requestAsk for the performance curve of the model we propose before you decide.
- Visit or collect in NairobiOur store is at KCB Building, Enterprise Road, in the Industrial Area, so you can see parts before you buy or collect your order.
- Quotes your wayAsk for prices by phone, WhatsApp, email or the online quote form, whichever suits you on site.
- Over 1,600 products in one placeOur catalogue covers 55 categories, so one supplier can handle most of your parts list.
- Help choosing the right partSend a nameplate photo, a drawing or the old part, and we help you match size and specification.
- Single items or project quantitiesWe price a single replacement part just as readily as a full site order.
- Supply across East AfricaWe serve customers across Kenya, and we also supply buyers in Uganda and Tanzania.
Related products and accessories
Browse more: Industrial Pumps · Fuel Pumps · Hoses, Flexible Pipes & Irrigation · Valves.
Ordering from Sparks Plumbing Experts
We supply customers across Kenya, and we also serve buyers in Uganda and Tanzania. You can collect from our store at KCB Building, Enterprise Road, Nairobi, or ask us about delivery to your site. Send your quantities and specifications, and we will reply with prices and availability.
Request a Quote WhatsApp 0726 086 895
Frequently asked questions
How do I set a dosing pump?
Adjust stroke or speed, then measure output with a calibration tube.
What details do you need to quote positive displacement pumps?
Tell us the liquid, flow rate, head or pressure, temperature, power supply and any model number or nameplate photo. A photo of the old part, a nameplate or a drawing also helps. Then call or WhatsApp 0726 086 895, or use the quote form on this page.
Do you deliver positive displacement pumps outside Nairobi?
Yes. We supply customers across Kenya, and we also serve buyers in Uganda and Tanzania. Delivery or courier arrangements are agreed when you confirm the order.
How much does a positive displacement pump cost in Kenya?
The price depends on the model, size, materials and quantity. Therefore, send your list with a quote request and we will reply with current figures.
Why must the outlet not be closed?
Pressure builds quickly and can damage the pump or pipes.
Can these pumps handle solids?
Some screw and lobe pumps can. Gear pumps need clean liquids.
How is flow adjusted?
By speed, or stroke length on dosing pumps.
Are they self priming?
Many are, within limits. Confirm the model.
Which seal material do I need?
It depends on the liquid. Tell us what you pump.
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Positive displacement pumps price in Kenya
Prices change with size, model and quantity. Request a quote from Sparks Plumbing Experts for current figures.
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