Mechanical diaphragm pumps with spring return mechanism. Mechanical diaphragm pumps with spring return mechanism. innovation > technology > future

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1 D Exacta Series Mechanical diaphragm pumps with spring return mechanism Mechanical diaphragm pumps with spring return mechanism Standards innovation > technology > future

2 The D Exacta Series is the result of many years experience acquired by SEKO BONO EXACTA in many application fields. Economical and reliable, with mechanical actuated diaphragm, this series is an ideal solution for industrial applications where chemicals have to be pumped safely at low pressure. A very low maintenance is one of the main reason to chose this models. It is in turn run by a IEC motor, which is standard in size, shape and electrical connections. The installed motors can therefore be three or mono-phase, and with powers measured according to the needs of the application. These pumps, in ATEX versions, can be used in classified areas. The D Exacta Series pumps adopt the principle of the eccentric with spring return to control the stroke variation and therefore the dosing of the pumped fluid. This principle is considered reliable, tested and simple to maintain. Standards The turning of the eccentric, is obtained via a crown-screw reduction gear, placed in the aluminium pump s casing. process & systems division > mechanical diaphragm pumps with spring return mechanism

3 DS1 Exacta Series Mechanical Diaphragm Metering Pumps DS1 pumps are mechanical diaphragm metering pumps featuring a spring return mechanism in an aluminium housing. Technical Features Flow Rate from 5,5 to 460 l/h (1,5 to 122,7 gph) Pressure Stroke rate Diaphragm Diameter Motor Powers Stroke Length Version from 10 to 5 bar (145 to 72,5 psi) PP Version from 10 to 5 bar (145 to 72,5 psi) stokes/minutes from 65 to 165 mm Standard 0,18 0,25 0,37 kw (IP55) 2 mm 4 mm 6 mm DS1 Exacta Series Model Diaphgram Diameter Strokes /min. Stroke Lenght (mm) Max. Max. Pressure 3 Phases Flow Rate PP motors l/h gph bar psi bar psi kw Connections Ø GAS PP DS1A065A 5,5 1,5 DS1A065B , ,18 1/4 F 1/4 F DS1A065C 11 2,9 DS1A094A 20 5,3 DS1A094B , ,25 3/8 F 3/8 F DS1A094C 40 10,7 DS1B108A 60 16,0 DS1B108B , ,37 3/8 F 3/8 F DS1B108C ,0 DS1C138A DS1C138B ,3, , ,5 0,37 3/4 F 3/4 F DS1C138C ,7 1 F 1 F DS1C165A ,3 DS1C165B ,0 5 72,5 5 72,5 0,37 1 F 1 F DS1C165C ,7 innovation > technology > future

4 Diaphgram Diameter A B C T /4" g.f /8" g.f /8" g.f /4 g.f 170 1" g.f " g.f. 190 Diaphgram PP Diameter A B C T /4" g.f /8" g.f /8" g.f /4 g.f 160 1" g.f " g.f. 193 Pump standard specials Head Materials Pump head AISI 316 L PP PVC PP PVDF Diaphgram Valves PYREX PYREX Ceramic Valve Seats PVC PVC PVDF Model number (Key to symbols) D S1 A 094 B 51 B4 000 Pump Type Mechanism Type Stroke Length (A= 2 mm B= 4 mm C= 6 mm) Diaphragm Diameter Strokes/Minutes (A= B= C=) Pump Head Materials (see table) Motor Power Optional Liquid End or PP pump head (standard). The material in contact with the liquid to be dosed are listed in the pump head materials table (special materials may be supplied on request) Diaphragm The diaphragm, blocked between the head and the head support (in PP), guarantees the holding of the pumped fluid towards the ambiance. Our diaphragm, permits a dosing precision of + or - 2% in the % field Max. Dosage Temperature For all pumps head version: 45 C Flow Rate Adjustment Every pump can be equipped with an electric actuator which accepts a 4-20 ma signal, please note that pumps come with manual adjustment as standard. Max. Suction Height: 1,5 mt

5 The flow rate of the pump can be done by: Manually with grip handle and graded vernier Electric servomotor with a 4-20mA signal and manual emergency adjuster Diaphragm dosing pumps are especially used where pressures are limited within 10 bar. The diaphragm used in our pumps is the result of research and development, in order to obtain the best volumetric capacity with the varying of pressure. The result optained is an optimal capacity and a long life span of the diaphragm itself. Just one model with different stroke lengths and diaphragm diameters, covers a flow rate up to 460 l/h. This kind of pumps with no leakages or fluid loss, are particularly oriented in keeping a better environmental condition on site. Inverter, by regulating the speed of the motor, keeping the manual adjustment on the stroke length Pneumatic servomotor, especially for classified areas Electric servomotor Its used when the pump's flow rate has to be automatically adjusted by analisys instruments such as PLC or DCS. Power Supply 115/230V - single phase - 50 Hz - IP65 Locally lubrificated Manual emergency adjuster Regulation signal 4-20mA with reply signal Accessories Safety valves: Safety valves are installed to prevent dangerous situations in case of unexpected overpressure that can damage the pump and the pipes. Back pressure valves: To allow the correct operation of a pump and to prevent the flow-through (siphoning) of the process liquid, the discharge pressure should be greater than the suction pressure; when this condition is not respected then a backpressure valve can be the solution. Pulsation dampers: The reciprocating movement of the piston generates pulsations: during each stroke the liquid contained in the suction and discharge lines is accelerated from zero to the maximum speed and then decelerated to zero again. Pulsation dampers are the accessories suggested to reduce high and not permissible pressure fluctuations or to obtain a linearity of the flow. Calibration pots: The calibration pot installed on the suction line gives the possibility to check the actual flow rate of a metering pump in the real operating conditions. The capacity of the calibration pot should be as to permit a measurement during 60 seconds approx; the calibration pot should be installed in vertical position near the pump and should be fitted with check valve to simplify the use. innovation > technology > future

6 w w w. s e k o. c o m SEKO Asia Pacific SINGAPORE SEKO China CHINA SEKO do Brasil BRAZIL SEKO Dosing Systems USA SEKO Southern Africa SOUTH AFRICA SEKO Deutschland GERMANY SEKO France FRANCE SEKO Iberica SPAIN SEKO Italia ITALY SEKO Sieta ROMANIA OOO SEKO RUSSIA SEKO UK UNITED KINGDOM BRO DSPUK 061 The technical data may be modified without notice. The drawings and images are only indicative