Double Piston Pump

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Dimple Belousson

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Aug 4, 2024, 12:50:29 PM8/4/24

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ThePutzmeister- KOS pump is a valveless two-cylinder piston pump for conveying thick media with high solids content. The pump unit consists of a sturdy pump hopper for reliable feeding of material, two hardened delivery cylinders with one piston each and a so-called S-transfer-tube for connection of the delivery cylinders to the output flange.

The changeover of the S-tube is done by two powerful plunger cylinders. Consequently, foreign bodies such as stones or dry running are no problem. Additionally the S- Tube is adjustable to wear in order to use the wear parts extremely long. Two hydraulic cylinders are used as drives for the delivery cylinders. An intermediate waterbox enables flushing and cooling of the cylinders as well as quick replacement of the pistons in case of maintenance. All moving parts are connected to a central grease lubrication (either manual or electrical) system in order to increase their lifetime.

Ideal materials to be conveyed with a KOS include sewage sludge and oil sludge with percentages of foreign bodies, bio-waste and other kinds of waste, chemical and organic high density solids with highest viscosity and highly dewatered sewage sludge. The decades of experience in concrete pumping ensure highest reliability and availability to the pump operator.

Easily transfer low to medium viscosity food and personal care materials up to 50,000 cps out of drums and totes. Graco's SaniForce 2:1 piston pump utilizes proven Graco air motor technology and smart sanitary design. The pump is extremely portable, weighing between 24 lb (10.8 kg) for the standard ...

Meler launches Micron + Dupla: a melter with double piston pump and high pumping power (100 kg/h per pump) that also has a 45L tank. It is positioned as one of the highest performance hot melt piston pump melters on the market. It is the largest of Meler's compact melters. At present, the range offered tanks from 5 to 35 l content. This range is completed up to a capacity of 45 l to meet the demand of sectors such as mattresses or product assembly.

Manufacturers need their industrial equipment to be versatile. That is why Meler has developed Micron+ DUPLA, a melter with two pumps that can operate separately or simultaneously depending on the customer's needs. If the application has several dosing points with different pressure requirements, Micron + Dupla adapts by creating two independent circuits of up to 100kg/h of pumping power. If, on the other hand, the production line requires a maximum adhesive flow, the melter is configured to offer a flow rate of up to 200 kg/h.

The change from one circuit configuration to two is done by a simple mechanical adjustment that any line manager can carry out in a few simple steps. This versatility is enhanced by the possibility of connecting up to 8 hydraulic outlets.

The new launch has also allowed Meler to expand the language of its Micron Technology. After 5 years on the market, the Micron+ HMI platform adds a "new universal language" in which symbols predominate instead of textual content. In this way, human-machine interaction delivers better results in markets where the use of uncommon alphabets increases complexity in daily work.

Accessibility criteria and the application of Easy-clean Technology are two other constants in the design of Meler equipment. The inclination of the tank favors the flow of adhesive towards the hopper and minimizes material remains at the end of the day.

The rear casing is easily removed to allow direct access to the inside of the equipment. The pump-piston assembly can be removed en bloc by simply loosening 4 screws. Maintenance of the equipment is intuitive and simple, designed to optimize daily work.

Double A PVPQ variable displacement piston pumps feature a rugged cast iron housing and optimized valve timing that result in quiet operation. These pumps are ideal for industrial or other noise sensitive environments.

These pumps have high operating efficiencies, and low deadhead power requirements. Maximum displacement stops allow flow to be adjusted to suit the application. Compensator response times are fast, with full flow to deadhead in 30 to 50 milliseconds, and deadhead to full flow in 70 to 110 milliseconds. A range of pump displacements are available.

These pumps were originally offered by Double A Hydraulics, a Division of Brown and Sharp, and are available while supplies last.

The Scientific Systems, Inc. (SSI) versatile LD Class Pump consists of dual-headed, positive displacement piston pumps, delivering unmatched performance for analytical, flash and small-scale preparative chromatography applications. With the patented SSI low dead-volume Pulse Dampener, advanced cam technology and dual piston mechanism, the LD Class provides virtually pulse-free operation. The pumps are designed for high flow rate accuracy and low pulsation required for Analytical Liquid Chromatography (HPLC). Standard fluid path materials are Stainless Steel and PEEK, in addition to optional Titanium.

A piston pump is a type of positive displacement pump where the high-pressure seal reciprocates with the piston.[1] Piston pumps can be used to move liquids or compress gases. They can operate over a wide range of pressures. High pressure operation can be achieved without adversely affecting flow rate. Piston pumps can also deal with viscous media and media containing solid particles.[2] This pump type functions through a piston cup, oscillation mechanism where down-strokes cause pressure differentials, filling of pump chambers, where up-stroke forces the pump fluid out for use. Piston pumps are often used in scenarios requiring high, consistent pressure and in water irrigation or delivery systems.[3]

In a lift pump, the upstroke of the piston draws water, through a valve, into the lower part of the cylinder. On the downstroke, water passes through valves set in the piston into the upper part of the cylinder. On the next upstroke, water is discharged from the upper part of the cylinder via a spout. This type of pump is limited by the height of water that can be supported by air pressure against a vacuum.

Piston pumps may be classified as either single-acting and single-effect (the fluid is pumped by a single face of the piston, and the active stroke is in only one direction) or double-acting and double-effect (the fluid is pumped by both faces of the piston, and the strokes in both directions are active).

In a single acting pump, only one side of the piston is in contact with the fluid. As a result of this, only one stroke is a delivery stroke. The theoretical delivery rate can be calculated by using the following equation:[5]

In a double acting pump, both sides of the piston are in contact with the fluid. As a result of this, both strokes are delivery strokes. An approximation of the delivery rate is given by the following equation:[5]

The piston in a plunger and piston pump does not move at a constant velocity and as a result of this the pressure and delivery fluctuate over the duration of the stroke. The following diagram shows the relation between the angle of the crankshaft and the delivery rate of a single-acting and double-acting pump. The line shows the average delivery rate of the pump. These fluctuations in pressure and delivery can cause undesired effects such as water hammer and thus are generally mitigated by the installation of an air-filled accumulator. The delivery can be further smoothed out by the use of multiple cylinders that are offset from one another.

Dual action pumps use two separate pumping chambers per drive rod. On the forward stroke, it pushes fluid out of the first chamber, and draws fluid into the other. On the back stroke, it the draws water into the first chamber and pushes fluid out of the other.

Dual action pumps use either a swab on a piston rod, a piston, or two plungers. When two separate plungers or pistons are used, both of them move in unison, in the same direction as the drive rod. Although different designs allow for different configurations, the basic concept is shown below.

This positive-displacement piston pump is designed to be used in pumping processes involving products with particles in their structure. It is worth highlighting that the pumping system has low shearing levels because it aims to safeguard the integrity of the product. This is particularly relevant for the processing of vegetables, sliced fruit, etc.

Our BP-series piston pumps do not damage the structure. They function on the basis of the alternate movement of a double-effect piston inside the pump. The piston in contact with the product is driven by a hydraulic system, fed by an independent hydraulic power plant. This design allows our clients to locate the hydraulic power plant in a location separated from the processing facilities.

Compact Design, Economical Conception, High Rotating Speeds, High Output Pressure, Reduced Noise Level, Smaller Installation Dimensions, One Piece Pistons with Piston Rings, Special Suction Fittings & Accesories, Simple Change of Direction of Rotation..

The pump has been developed with modern styling and design to satisfy market demand as to designed new generation plate and pistonswith give high flow performance, high pressures with high efficiency and very small dimensions.

In the 1930s, Knud Arnesen, son of IRON founder Christian G. Arnesen, developed several pump series, such as the BD piston pumps, which have remained in production up to the present day. The robust construction, the reliability and the performance supersede any other pump types of modern design. The piston pump is particularly suitable for self-priming applications and offers the user a high degree of security.