Pneumatic pumping plants are units capable to operate with solutions within a very wide range of densities, such as mortars, corrosive liquids, liquids having high viscosity and containing solid inclusions, highly flammable liquids.
These pumps are general-purpose units capable to cope with various industrial processes in petroleum processing, chemical industry, paper industry, extraction of minerals etc.
A pneumatic unit is provided with a reservoir, taps and pipes to intake or discharge liquids. Self-regulating valves are installed on pipes; these valves are opened or closed, depending on liquid availability or absence. A pneumatic pump is also provided with air ducts for compressed air intake or discharge; valves are used for this purpose. Air ducts, in turn, are equipped with inner floats designed to automate the process.
For early pneumatic pump models, the term pulsometers was applied because they delivered substances as a pulsating (oscillating) flow. These were closed vessels with two pipes; valves (for liquid delivery) and air ducts were installed on these pipes. The valves were manually-controlled. The major disadvantages of these apparatus included low capacity (10% to 15% efficiency) and non-uniform liquid delivery. However, due to several advantages, such as capability to deliver mixtures with high concentration and low stirring of sediments at the bottom space, resulted in further development and improvement of these units.
Flow chambers are installed at both sides of a pneumatic pump, between the outer side of a membrane and the pump casing. The air chamber used to receive compressed air from the distribution mechanism is at the opposite side of a membrane. As a result, there is no contact between air chambers and the pump flow mechanism. The air mechanism delivers compressed air into one chamber, impacting the inner part of a membrane and driving the membrane to move towards the casing. As a result, operating substance is displaced into the pressure line. The membranes are connected by the rod in such a way that when one membrane displaces substance, the other membrane sucked it out. This results in vacuum in an opposite chamber. At the end of each stroke, the distribution mechanism is switched automatically to deliver compressed air into the opposite chamber. This process is repeated again and again. During discharge and suction, pump valves operate as check valves, preventing substance leakages from one trunk to another. Due to double pipes, two substances can be processed not being mixed; these pipes separate the pump flow channel in such a way that substances flow separately from each other at the same speed.
A pneumatic pump has a heating jacket; it is used when the specific temperature (high or low) has to be kept during operation with some liquid to prevent it from solidification, crystallization etc. The heating jacket operates due to the liquid flow circulating through it continuously (heating or cooling liquid can be used as necessary). The jacket is on the top of the pumping unit casing, not in contact with the flow channel parts.
High-pressure pneumatic pumps are also available. These pump models have a reinforced casing, a pressure booster and a pneumatic regulator. The booster provides higher operating pressure; as a result, compressed air delivered by the compressor is consumed in higher volumes. This pump configuration is small-size and can be easily mounted on a press filter. These units can press quite dense substances (even such as clay) through filters; also, these units are self-regulating and can be equipped with liquid level and pressure control devices.
A pneumatic pump is a small-size unit, no high expenses are necessary to operate it, and it is lubrication-free. These pumps can operate with a wide range of liquids, from those with high viscosity and solid inclusions to pure water. These units are sealing-free, and they are environmentally safe because they are completely leakage-free. They do not emit sparks and, therefore, can be operated in hazardous rooms; also, they have strong multilayer membranes making them appropriate for operation under heavy conditions. These units are variable-capacity devices: their capacity is easily adjustable by the discharged air volume regulation. The pressure line opening or closing results in automatic pump running or stopping; these processes do not result in temperature rise or wear.
Pneumatic pumps are multi-purpose. Due to their general-purpose applicability, their equipment meeting the modern requirements and their long service life, these pumps are applied in many branches of industry. There are no alternatives for these units in cases when corrosive substances containing sediments, suspensions, admixtures etc. must be pumped. For example, pneumatic pumps are widely used in petroleum refining industry, food industry, chemical industry, for paper making, in photographic laboratories, in shipbuilding, for paint and varnish making, in pharmaceutical industry, for ceramic making and electroplating.
We are convinced that our company ENCE GmbH will become your reliable and efficient distributor (authorized representative) of your pneumatic pumps in the Russian market.