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Pumps
Metering & Dosing Pumps
Metering pumps add chemicals at an accurate, adjustable rate for water treatment, cooling towers, boilers, swimming pools and process lines. Seven Star LLC, an independent supplier in Muscat, supplies metering and dosing pumps from Blue-White, SEKO, Walchem, ProMinent, Grundfos and KRACHT to customers in Oman and the GCC.
Read the full category guide- 21 products
- 8 brands
Category guide
About Metering & Dosing Pumps
Metering pumps add chemicals at an accurate, adjustable rate for water treatment, cooling towers, boilers, swimming pools and process lines. Seven Star LLC, an independent supplier in Muscat, supplies metering and dosing pumps from Blue-White, SEKO, Walchem, ProMinent, Grundfos and KRACHT to customers in Oman and the GCC.
Types of metering pump in this category
Solenoid diaphragm pumps such as the ProMinent gamma/ XL, SEKO Tekna TPG and Walchem EWN-Y and EHE dose small volumes against pressure. Digital diaphragm pumps like the Grundfos DME and Walchem IX give wide turndown and flow control. Peristaltic pumps such as the Blue-White FLEXFLO A1, A5 and M3 and SEKO Kronos handle off-gassing chemicals like sodium hypochlorite. Mechanical and multi-diaphragm pumps (Blue-White CHEM-FEED C2, C3, CD3 and C-600P, SEKO Spring MS1) cover larger flows, and KRACHT gear metering pumps dose viscous liquids.
How to select a metering pump
Specify the maximum flow in l/h, the back pressure, the chemical and its concentration, and the control signal (manual, pulse, 4-20 mA or network). Choose head and seal materials for chemical compatibility, and allow headroom so the pump runs between about 10% and 90% of capacity. Add accessories such as injection valves, foot valves, pressure relief and pulsation dampers as needed.
Data needed for a quotation
Send the pump model, or flow, pressure, chemical, control signal, power supply and quantity.
What to include in your inquiry
These details let us quote the right item the first time.
- Fluid pumped and its temperature
- Flow rate and head
- Material of construction
- Motor power supply
- Model and serial number, for spare parts
- Hazardous-area requirement, if any
Missing some of them? Send what you have. A nameplate photo or an old part number is enough to start.
Brands in Metering & Dosing Pumps
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Request a Quote for Metering & Dosing Pumps
Looking for a specific model, part number or brand in Metering & Dosing Pumps? Send us your requirements and quantities. Seven Star LLC sources genuine industrial equipment for customers across Oman and the GCC and replies with a formal quotation.
- Genuine OEM products
- Supply across Oman & the GCC
- Formal quotation from our sales team
Free, no-obligation quotation · takes about 1 minute
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Frequently Asked Questions
Which dosing pump is best for sodium hypochlorite?
Peristaltic pumps are often preferred because they do not vapour-lock when the chemical off-gases. Diaphragm pumps with degassing heads are an alternative.
What is turndown ratio?
The ratio between maximum and minimum controllable flow. Digital pumps offer high turndown, so one pump covers a wide dosing range.
Can a metering pump be controlled by a flowmeter?
Yes. Many pumps accept pulse or 4-20 mA signals so dosing follows the water flow proportionally.
Which materials should the pump head be made of?
PVDF, PP, PVC, acrylic or stainless steel, chosen from the chemical compatibility chart for the chemical and concentration.
What should I send for a quotation?
The model, or flow, back pressure, chemical, control signal, power supply and quantity.