Tag Archives: dosing pumps

Dosing pumps

Dosing generally applies to the feeding of chemicals or other liquid additives, in accurately measured small quantities, into a process fluid at intervals to give sufficient time for the chemical to react or show the results. Diaphragm dosing pumps or piston dosing pumps are commonly used. The use of peristaltic or tube dosing pumps is also preferred by some users.

A peristaltic pump is generally preferred by the laundry and catering industries due to the ease of operation and the relatively low cost. These are regarded as the cheapest type of dosing pump for high volume installations where the price of the pump is amortised into the price of the supplied fluid detergent, brightener, softener etc.  The peristaltic pump is ideal for measuring  the exact dosing for each wash or rinse cycle. Dosing pumps are in reality a metering pump and these terms are used to refer to the same type of pump unit. A dosing pump can be a high pressure pump, however there is a large user base where the dosing of additives is into either no pressure or very low pressure systems.

A reliable dosing pump supplier will offer all types of pumps to suit each application. Acids are commonly dosed into process fluid streams by pumps with the wet component in materials suitable for reliable and safe handling of the specific acids being. The wetted pump chamber is typically PVDF, Poly Propylene, Stainless steel or some other noble metal.  Valve seats are also in the same materials with Teflon (PTFE)  valve balls and diaphragms making up the most common materials when speaking about diaphragm or piston dosing pumps.

Chemical pumps are available in all types of materials and it is important to specify the acid or alkali or other additives  to be dosed.

Aquarium dosing pump

Dosing pumps are also necessary on saltwater aquarium systems if one wishes to automate the calcium and alkalinity dosing. The small SEKO PR1 peristaltic pump is a very popular choice and can be automated with reef timer systems available from saltwater aquarium equipment suppliers. Seko will welcome all enquiries for the aquarium dosing pump arrangement we are able to supply.

Industrial dosing pump

Pumps are not all the same regardless of what industry wisdom tries to preach. When one considers a chemical dosing pump application, the chemical pump one has in mind is not a dosing or metering pump. Dosing pumps are not common applications to most industrial fitters or engineers and do not generally form part of their experiences on a daily basis. Typically dosing pumps would be used in water treatment on chillers, heat exchangers, cooling towers and on the odd occasion in the actual process stream when specific chemicals or additives need to be injected into the system. Dosing pumps can also be used in lubrication applications for grease or oils. Many of these applications are out sourced from the suppliers of the chemicals, additives or lubricants.

Swimming pool dosing pumps

Large swimming pools are generally maintained from a pH and Chlorine point of view by installing chemical dosing pumps. The pumps are controlled by probes for Redox (chlorine values in the water) or Ph which are directly coupled to the suitable Seko dosing pump designed for that application. The pumps are similar to those used in Industrial applications. Generally two pumps one with alkaline dosing and one with acid dosing would be connected to a pH controller and as the demand for either acid or alkaline is registered, the relevant pump will activate. Redox is controlled in a similar manner with liquid chlorine being measured by the dosing pump at the correct dosage based on the redox reading. Seko has a specific range of dosing pumps for Redox and Ph which integrate the redox controller (probe connects directly into the pump) or pH.

The metering pump industry is extremely competitive with many users looking for the cheapest options based on the dosing volume in litres per hour and pressure in bar. Price however cannot be the only consideration and here Seko have poured huge resources in terms of research and development into developing a  high quality, economical and efficient, low cost of ownership dosing pump range. As far as economically priced dosing pumps is concerned, Seko have added the correct stock profiles for each country they service. This means that when a specific dosing pump is required, Seko generally have that item ex stock in the country where it is required. Seko dosing pumps are also supported by a dealer network of qualified and experienced people. 

Regardless of what one requires a dosing pump for, whether it be an aquarium dosing pump, a swimming pool application or industrial dosing pumps for some specific process additive, Seko generally has the right pump for your application. Dosing is a science which when coupled to the correct metering pump equipment, becomes an art. In terms of a high pressure pump for dosing, Seko is capable of supplying units which inject specific measured doses up to 20 bar.

The range of solenoid driven diaphragm dosing pumps, peristaltic metering pumps and electric motor TEFC electric motor piston and diaphragm dosing pump options ensure a comprehensive solution to most applications in the industry.

Seko

Seko has been involved in manufacturing dosing pump equipment since the 1970’s. The company has expanded world wide including into the economic powerhouse China. Used extensively in the water treatment industry, Seko solenoid diaphragm pumps have gained a formidable reputation for reliability and cost effective ownership with many industrial users.

Seko international dosing pump manufacturer

Seko solenoid diaphragm pump

As the world rises like the phoenix from the ashes of apathy for the environment, a new attitude of responsibility and concern for our world is taking hold. Seko is at the forefront of chemical dosing research, birthing new and more cost effective  technologies for swimming pools and spa water treatments as well as industrial effluent, laundry and catering detergent and chemical injection systems.

Seko dosing pump products and integrated systems work in all environments and in all spheres of industry.

GM Pumps cc distributes the Seko range of peristaltic, solenoid and motor driven dosing pumps as well a small drum and IBC mixers. Please call our offices on  031 777 1629 or mobile 0826519841 or email sales @gmpumps.com

Farewell Nelson Mandela

Seko South Africa says farewel to Nelson Mandela

Farewell Mr. Nelson Mandela, first democratic South African President

All the staff at GM Pumps cc, distributors of Seko chemical dosing / metering pumps,  join the entire country in remembering the service of Mr. Nelson Mandela to the peoples of South Africa. Our prayer is that his vision for an all inclusive South Africa for all her people will begin to become the focus of his party in government.

SEKO dosing pump distribution Durban, South Africa

Seko dosing or metering pumps are distributed and supported by the Durban based distributor GM Pumps CC.

Evan Lewis is the sales, marketing and technical contact and can be reached on +27 82 651 9841 or email evan@gmpumpsa.com

Offices and workshops are at “The View” 1 zulu reserve road, Bothas Hill, Durban, South Africa.

The company is developing a full live demonstration and training facility for customers to experience the product in all facets.

Seko Digital Peristaltic Dosing pUmp

Peristaltic tube pump by Seko