What are they?
Triplex pumps are a type of reciprocating positive displacement pump that is used to move both thin liquids (such as water) and viscous fluids (such as oil). As the name suggests, the pump uses a triple mechanism, usually consisting of three pistons or plungers operating in cylinders that are all driven by a single power source.
How do they work?
A single piston pump or plunger pump can be very effective for moving fluids, but the reciprocating motion of the pistons or plungers creates significant pulsations in the discharge pressure, as well as subjecting the driving mechanism of the pump to severe cyclical loads which can cause premature failure of bearings and other mechanical components. However, when more than one piston or plunger are used, it becomes possible to make the flow much smoother, reduce the amount of pressure pulsations, reduce the fatigue loading on the mechanical components of the pump, and the achievable pressure and flow of the pump is also enhanced.
Typically a triplex pump is driven by an A.C. motor, which then has a crank-shaft and connecting rod assembly to convert the rotation of the motor shaft to the reciprocating motion of the pistons or plungers, in much the same way as an internal combustion engine works. Note that there are some piston and plunger pumps with more than three cylinders (quintiplex pumps with five cylinders are common in oil production pumps). The pump typically has a set of check valves for each cylinder, one at the inlet and one at the outlet, which is common for all reciprocating positive displacement pumps.
Where are they used?
Small triplex pumps with plungers are commonly used as high pressure wash pumps, sometimes called power washers. These can be used on farms, car washes, and commercial and industrial wash down stations. Very small versions are also used as power washers for home use. Larger versions, both piston and plunger type, are mainly used in applications related to oil drilling and oil well service. All types can be very effective in handling many different kinds of heavy, viscous, and corrosive fluids, including abrasives, slurries, and liquids that contain large amounts of solids.
Arimitsu offers triplex plunger pumps for industrial, pressure washing, carwash, and misting applications. The company's pumps have a flow capacity to 392 gpm and pressure ranges to 24,000 psi. Arimitsu's triplex pumps offer several benefits, including compact design, lower energy consumption, low maintenance cost, higher pressure, and quiet operation.
Our DP pump series can be configured to handle any liquid medium, while achieving pressures up to 15,000 psi and flows up to 500 gpm. Special materials for the fluid end and the plunger seal construction are selected to suit the medium.
Centrifugal pumps can sometimes be noisy, perform poorly, break shafts, and cause other problems. This is often due to one of many pump suction conditions.
J. Hamilton Wright shows us some of the benefits that self-priming, centrifugal pumps can offer in industrial plants.
Author explains the reasons why it's important to determine the right pump type and size when evaluating a pump for a slurry application.
Mass Megawatts Wind Power, Inc. announced the successful delivery and operation of a larger wind-powered, water pump system in Colorado.
Double hose-diaphragm pumps in quintuplex configuration guarantee minimum pulsation and wear. German pump manufacturer Feluwa's Multisafe double hose - diaphragms pumps make easy work of moving aggressive or abrasive products long distrance, according to a company news release.
Pumps continue to be big business. The world market for pumps used by industry, municipalities and for irrigation will total an estimated $45 billion by 2017.
According to a company press release, Jeff Wiemelt will assume the role of president for the Sundyne on January 1, 2012. Wiemelt previously held vice president and general manger of Sundyne Americas and Sundyne Dijon in France.
Frost & Sullivan has honored NETZSCH Pumps & Systems with the 2011 Best Practice Award for increased customer benefit. NETZSCH's customer focus and product innovation were a few key factors in winning the award. NETZSCH is a leading manufacturer of progressive cavity pumps, screw pumps, lobe pumps, metering pumps and other equipment.
Graco introduces a new hose pump that uses a single, oversized roller that compresses a low friction hose through a full 360-degrees of rotation. This design can put 40% less stress on the hose compared to conventional shoe pumps running at the same flow rate. The pump also has 50% more fluid flow per revolution than C-shape positive displacement pumps.