SEKO have been a significant manufacturer of metering pumps and dosing systems for over 40 years. They manufacture a complete range of metering pumps and dosing systems, including piston plunger, mechanical diaphragm and hydraulic diaphragm pumps.  Many of the products can be manufactured and supplied according to API 675.

SEKO metering pump

     The main features : no moving seal, no leakage and easy maintenance; the measurement accuracy is superior to the mechanical diaphragm pump and the sealing performance is superior to the plunger pump;the three valve structure and the application of the limit oil compensation mechanism can not only guarantee the hydraulic pressure of the hydraulic fluid, but also avoid excessive oil filling, prevent liquid pressure shock and balance the force balance between the two sides of the diaphragm.

  In order to improve the service life of the diaphragm, the application range is wide, except for clear water, it is suitable for transportation with strong corrosion,inflammable and explosive, toxic, malodorous, medium viscosity, radioactive or valuable liquid, and for preventing the rupture of the diaphragm, the mixture of medium hydraulic oil is caused by  inflammable, explosive, toxic and valuable.When liquid is used, double diaphragm
metering pump can be used and the diaphragm rupture alarm device can be used.

Diaphragm metering pump

     Working principle: the pump head,plunger, filler composition working cavity,through the plunger in the reciprocating line movement, make the volume of the working chamber change periodically, to the medium of the inlet valve group and the outlet valve group.

     Main features: the discharge pressure range is wide; the shaft seal is packing seal,can adjust the packing gland, and the sealing performance of the filling is reduced;the structure is simple and the maintenance is convenient.

Plunger metering pump

    Air reversing valve of QBY third-generation Pneumatic ( air operated ) diaphragm pump features in design with simplicity and high reliability, which makes the whole QBY3 ser ial products achieve their most reliability in any applications .

    Reversing valve is a three-dimensional pilot valve that can ensure＂no sticky＂in a true sense. All parts can be replaced without opening the fluid cavity. Aluminum parts are treated wi th anodic oxidation and epoxy coatings which can resist corrosion from unclear air.

Diaphragm pump