BOILERS, PUMPS & VALVES
NEW PUMPS MEET THE CHALLENGES OF HANDLING TOUGH ABRASIVES
PUMPS FOR HIGH PRESSURE, HIGH TEMPERATURE APPLICATIONS
A
new positive displacement axial piston pump which offers outstanding performance in high pressure, high
temperature applications has been introduced by Precision Micro-hydraulic specialists The Lee Company. The HPHT family of pumps can generate up to 10,000 psid (690 bar) at temperatures of 200ºC so are ideal for critical hydraulic fluids transfer applications such as down hole oil tools and aerospace. An important benefit of the innovative axial
piston design of these pumps is that they don’t contain any elastomers, which increases resistance to contamination and significantly improves reliability in the most challenging applications. Also, the 32mm pump is a simple, drop-in replacement for existing pumps which are restricted to lower temperature applications due to the inclusion of elastomeric seals.
A
new range of Internal Gear Pumps ideally suited to applications
involving asphalt and bitumen have been added to the Viking Universal Series of pumps available from the UK pump specialist Michael Smith Engineers. Viking Pump has continually developed its range of Universal Seal Internal Gear pumps and the new ASP series is another example of an upgraded option which is ideal for handling the toughest abrasives. When pumping asphalt, bitumen and other
similar abrasives, pumps have traditionally been sealed with packing which must continually leak to stay lubricated. These two new options, the ASP1 and ASP2 are supplied with Viking’s innovative O-Pro Cartridge seal which uses O- rings in combination with a lubricating grease. This ensures a robust seal that improves operational efficiency as it does not need periodic repacking or re-tensioning of the seal gland which eliminates the risk of leaks and prevents loss of product and the associated clean-up costs. Both options are designed specifically for
handling asphalts, bitumen, pitch, tar, bunker and residual oils and other similar materials that solidify at ambient temperatures. They are designed to melt ambient temperature solids to a liquid state prior to pump start-up by using integral jacketing for steam or hot oil. The ASP1 model is an ideal option when
pumping clean, non-abrasive liquids. This builds upon Viking’s proven design of a robust and reliable pump that has been used for decades to successfully transfer asphalt by adding shaft seal leak prevention through use
of Viking’s O-Pro Cartridge seal. This patented seal uses a double O-ring design with grease lubrication ensuring a robust and reliable seal which prevents leakage from the pump and are an ideal option when pumping clean, non-abrasive liquids. Alternatively the ASP2 model is ideal for
pumping more abrasive liquids in applications involving filled asphalts often used for asphalt roofing and sealants. The ASP2 model features hardened
components in key wear areas, such as bushings, shaft, rotor and idler, which helps to ensure optimum wear resistance for long-life and reliable operation in the most demanding situations. Other important benefits of the positive
displacement internal gear pumping principle include; the ability to handle a wide range of viscosities with a constant flow rate while tight clearances mean high efficiency along with excellent priming capabilities. Also, double row ball or tapered roller bearings improve thrust control while the threaded one-piece bearing housing allows for easy end clearance adjustment whilst providing a rigid foundation to maximise seal and bearing life. ASP pumps have the capacity to operate on
applications handling fluids with viscosities ranging from 20 to 440,000 cSt, at flow rates up to 340 m³/h, pressures to 14 Bar and temperatures ranging from -15ºC to +230ºC.
Michael Smith Engineers
www.michael-smith-engineers.co.uk
38 DECEMBER/JANUARy 2022 | FACTORy&HANDLINGSOLUTIONS Whilst HTHP pumps are officially rated to
produce pressures of 10,000psi they actually have the capability of producing even higher pressures and are qualified for over 1,000 hours of operation and will withstand high levels of shock and vibration. They are designed to be driven by a Maxon Motor, with or without a gearbox and drive couplings are available separately. The pumps are available in 22mm and 30mm
diameter options for packaging flexibility, benefits which will be especially appreciated in limited space applications, such as down hole. Cylindrical Hi-Bar inlet screens which slide onto the pump body are also available as an option. The pumps can be customised to meet specific application requirements, such as altering the mounting configuration, or the inlet and outlet connections.
Lee Products
www.leeproducts.co.uk
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