Prospekt TF-englisch.indd - Steinle Industriepumpen GmbH

More documents

Recommendations

Info

The Tapfl o - Pump Quality for Filter Presses The company Tapfl o AB was founded in Kungälv (north of Gothenburg) 1985 and has been working with the design and manufacture of air operated diaphragm pumps since that time. These pumps are especially qualifi ed for applications in the high pressure domain. The company Steinle therefor exclusivly employs Tapfl o pumps in the TF-series for fi lter press charging. Double-acting diaphragm pump The Tapfl o air operated diaphragm pumps belong to the group of displacement pumps. They are driven by compressed air. Two diaphragms, connected by a shaft, are being pushed back and forth by alternatingly pressurizing the air chambers behind the diaphragms by means of an automatically cycling air valve system. The air valve switches over as soon as one diaphragm has reached the end position. While one diaphragm transmits the force from the air pressure onto the liquid in the housing, the opposite pressure-relieved diaphragm creates a suction action when being pulled back from the housing. Therefor the slurry fl ows into the chambers and gets driven out by the next stroke. The chamber is alternatingly opened and closed by valve balls. During each cycle the air pressure on the back of the discharging diaphragm is equal to the head pressure on the slurry side. This is the reason for the long life time of the diaphragms even at high pressure applications. Air valve The air valve provides for the reliable switching over of the strokes . It consists of brass and is equipped with self-lubricating seals. It does not require any kind of lubrication and reliably switches over from any position to another. The air valve is maintainance free and, when inquired, also available in stainless steel. Long-Life-Diaphragms The sandwich PTFE diaphragm does not require any external plate. Its surface is perfectly smooth. It can be applied up to 120°C and is consistent against almost all chemicals. The EPDM and NBR diaphragms show particular mechanical qualities. Applicable up to 120°C EPDM and 90°C NBR. © 2/2007 Steinle Industriepumpen GmbH - Series TF / Änderungen vorbehalten
© 2/2007 Steinle Industriepumpen GmbH - Series TF / Änderungen vorbehalten Filter presses with STEINLE-pump station Automatic adaption When slurry is transfered to a chamber fi lter press, fi rst the chambers get fi lled while the pressure tends to zero. Under an increasing fi lling-level the solids assemble at the fi lter cloths. This requires a pressure that continiously rises with the increasing content of solids. Under an constant fl ow quantity the pressure would rise extremly fast. The drive of the Steinle charging pump by compressed air causes a diminution of the fl ow quantity according to the increasing counter-pressure in the fi lter press. This produces a soft fi ltration curve, automatically self-regulating according to the fi lling-level of the fi lter press. This is independent from the properties of the slurry. No pressure tank nor pressure transmitter nor speed control are required. The complete pump works without electric energy. End of fi ltration process When the fi lter press is fi lled with solids so far that no more slurry can be taken up, the pressure / flow rate 16 14 12 10 8 6 4 2 0 Accessories – Stroke Sensors – Solenoid Valves – High pressure Pulsation Dampener Filtration time pressing period is terminated. The air operation of the Tapfl o pumps then reduces the fl ow rate to zero while the outlet pressure holds the required level compressing the fi lter cake. Excellent results in drying are obtained. At the end of the pressing period the pump simply stops. Pressure adjustment The required pressure in the fi lter press is comfortably adjusted by the height of the air pressure supplying the charging pump. For a required pressure of 12 bar the pumps has to be supplied with 6 bar, when the type TF with a pressur transmission of 1:2 is applicated. Low air consumption The TF-pumps need the maximum air quantity only during the fi lling period. The more the press is fi lled, the more slowly the pump works. So the air consumption slowly reaches zero during progressing fi ltration. Typical graphic representation of a filter process Pressure P Flow rate Q 1 2 3 4 5 6 7 8 9 10 11 12 – Air treatment Device – Pneumatic Level Control Unit
Page 1 and 2: © 2/2007 Steinle Industriepumpen G
Page 3: © 2/2007 Steinle Industriepumpen G
Page 7 and 8: © 2/2007 Steinle Industriepumpen G

Prospekt TF-englisch.indd - Steinle Industriepumpen GmbH

Create successful ePaper yourself

Delete template?

Save as template?