Keywords
Citation
(1998), "Pocket sized pump ideal for corrosive liquids", Anti-Corrosion Methods and Materials, Vol. 45 No. 4. https://doi.org/10.1108/acmm.1998.12845dad.010
Publisher
:Emerald Group Publishing Limited
Copyright © 1998, MCB UP Limited
Pocket sized pump ideal for corrosive liquids
Pocket sized pump ideal for corrosive liquids
Keywords Corrosive materials, Pump, Pump Engineering
The Pageboy SFD15 self-priming diaphragm pump is said to be ideally suited to pumping aggressive or corrosive liquids such as solvents or strong acids (Plate 4). It incorporates a stress-free diaphragm which ensures reliability and long-life, even when pumping liquids such as MEK, acetone or chloroform.
Available from liquids handling specialists Pump Engineering, this pocket sized, air-operated pump has low air consumption and is stated to be safe to use in hazardous areas. It is designed to stop automatically against a closed valve, maintaining a delivery line pressure equal to the air supply pressure and starts automatically when the delivery line pressure falls, such as when a valve is opened.
The pump consists of a chamber which is divided into two compartments by a diaphragm. One chamber is the pneumatic pressure/vacuum chamber, the other is the pump chamber. Compressed air enters through a venturi which reduces pressure in the pressure/vacuum chamber causing the diaphragm to move away from the pump chamber (the suction stroke).
The diaphragm pushes the control rod until the poppet valve closes the air exhaust port. As the pressure rises in the pressure/ vacuum chamber the diaphragm is forced into the pump chamber (the delivery stroke), during which the diaphragm pulls the control rod off its seat. This allows air through the venturi causing the suction stroke to be repeated.
Plate 4 Pageboy SFD15 pump
Because the diaphragm is used simply to separate the air from the liquid it operates without stress, this ensures high reliability, particularly when compared with other types of diaphragm pump.
The SFD 15 pump is designed for vertical upward flow and can be mounted by the extended tie rods supplied. It has a maximum output of 3 lit/min and maximum pressure of 6 bar. Air supply required is 80-100psi and air consumption is approx 0.5cfm.
A choice of body materials include polypropylene, PTFE, stainless steel or aluminium, the diaphragm is made from PTFE, with seals to suit application.
Details are available from Pump Engineering Ltd. Tel: +44 (0) 1903 730900; Fax: +44 (0) 1903 730234.