Plunger or piston pump

The plunger pump is similar to the piston pump, except that the reciprocating member instead of the piston is a one-way plunger (meaning that there is only liquid discharge along the path) and is sealed in the packing cylinder walls. Be. Generally, high pressure applications use plunger pumps instead of piston pumps. These pumps are capable of achieving the highest pressure achievable by a reciprocating pump and capable of achieving pressures above 50000 psi in some very specific applications. Plunger pumps usually have higher speeds than piston pumps but have a lower cost than them. However, the plunger pump may have a higher maintenance cost and less wear resistance than a piston replacement. In all types of reciprocating pumps, relatively high pressure fluctuations are produced.


Plunger Pump Performance

The greater the number of reciprocating components, the greater the fluctuation. However, it is often necessary to use oscillating damping equipment downstream of the pump outlet. An oscillator dampener is a tank that is separated from the middle by a bag or membrane and in the upper half there is either air or nitrogen or a neutral gas. As the membrane flexes, the compressed air and the fluctuations produced by the reciprocating pump motion dampen.

Piston pumps are reciprocating pumps consisting of a liquid section. The pump's power terminal captures the propulsion and converts rotational motion into reciprocating motion. The actuator can be a motor engine or a turbine that its output should crank handle piston and Morasi and Hdbh reciprocating motion converted the old design that the Direct Acting is said, the cylinder heater with milk input And there is an outlet at the power terminal that allows the steam to move the liquid side piston.

The liquid part of a reciprocating piston pump consists of a chamber with a fluid inlet and outlet, and in most designs one-way valves are used. When the piston moves in a single direction, the valve of one The open sided rudder (while the unilateral valve remains closed) directs the fluid to the pump fluid terminals. As the piston moves in the opposite direction, the inlet valve closes and the outlet valve opens, causing the fluid to move toward the drain and outlet.

Piston pumps have pistons that move through the cylinders and seal them using elastomeric or outer packing pistons. Alternatively, the piston may by itself An elastomer with interfacial adaptation is made. Piston pumps can be one-way or two-way, but they are often two-way. In a two-way piston pump, the fluid is discharged in both forward and backward movement of the piston (it requires four one-way valves for each piston). In a one-way piston pump, the fluid only moves upward. Exits the piston. In general, bidirectional designs are associated with slower speeds and medium pressures, whereas unilateral designs are generally associated with higher speeds and pressures.

In selecting a piston pump, high inlet pressures must be considered as a very important parameter. When inlet pressures are high, two-way piston pumps are more efficient than single-sided pumps and directly use inlet pressure to reduce power terminal load. High inlet pressures can also influence the choice of actuator. Two-way piston pumps can use the pressure difference to calculate the horsepower required, while one-way pumps only use a fraction of the inlet pressure to compensate for the outlet pressure. Reciprocating pumps can have a reciprocating piston, punch or diaphragm (called a simple structure) or contain several reciprocating pumps with a reciprocating double, double and pump structure having three The part is called the ternary compound.

The high functionality of high-pressure piston pumps makes it one of the few options to be used in applications requiring such a feature.Most centrifugal pumps capable of working with materials are capable of providing a limited head size (only a few hundred meters of head).Reciprocating piston pumps perform better than abrasive pumps in abrasive applications. In piston pumps and in abrasive applications, elastomeric pistons are used and the cylinders are coated with tungsten carbide or other hard materials. Any type of piston and piston pumps are used in important applications in the oil industry and pipelines. These types of pumps are small in size, usually in a horizontal configuration and larger in size, in a vertical configuration to load Less on bearings, packing and cross head. Although the vertical design of the pump saves space, it is relatively more expensive and more difficult to maintain than the horizontal design.

Piston pumps are limited at lower speeds for a variety of reasons than the planter types. (Piston pumps usually operate at 100 rpm or kWh).This is partly to alleviate the many unbalanced forces that exist in the Two Throw variants at 90 degrees Piston pumps are usually designed for longer lifespan than the plunger types, so conservative design means a lower speed for them. Constructed, and therefore, more capital-intensive than a planter pump, and more financially burdensome in a particular category. However, a lower speed reduces maintenance costs of the piston pump compared to the pump.

Note that the permitted or nominal speed of a reciprocating pump does not depend solely on whether the pump is of a two-way or one-way piston type. The dimensions of the valves limit the pump speed for any given size of piston or plunger. Sometimes the rate of inlet opening is also an important factor in limiting pump speed. In addition, liquid viscosity also affects the pump speed, and reciprocating pumps that deal with high viscosity liquids should work slower. At a reciprocating pump, the fluid flow through each one-way valve is not constant and varies continuously from zero to the maximum value. Therefore, special attention should be paid to the selection of the pump that can do its job without cavitation at the inlet stage.

As a general definition, a planter pump is a pump in which the energy transfer to the fluid is performed periodically. Plunger pumps are generally known in the market as piston pumps, carwash pumps, high pressure pumps and cylinder pumps.







Frequently Asked Questions

How does a piston or planter pump work? 
A: In piston pumps, electric motors are responsible for supplying the necessary propulsion. In a piston pump or crankshaft, there is a rotational motion that will move the cylinder and convert the piston output. In the next step, the piston retracts the cylinder into the working plan of the pump, which is created in the suction piston and driven through the fluid inlet valve to the cylinder. The piston will also have an upward and forward motion, closing the inlet valve and allowing the fluid to exit the piston through the outlet valve.

What is the characteristic of the inlet and outlet valves in the plunger pump piston? 
Answer: The inlet and outlet valves of the piston are one-way plunger pumps and are designed so that they cannot enter the low-pressure part of the piston when the reciprocating steps occur in the piston fluid. High pressure also applies.

How is the diaphragm pump different from the diaphragm pump? 
Answer: If a plunger is used in a reciprocating pump instead of a piston, that pump is called a plunger. Now if this plunger causes the diaphragm to move in the pump, it is called the diaphragm.

What is the difference between a piston and a plunger? 
A: There are differences in the reciprocating pump between the piston and the plunger that is in the pump; for example, the piston typically travels a distance within the cylinder that is longer than that of the piston head, but contrary to the distance that A cylinder in a cylinder is shorter than the length of the cylinder head. Another difference between the two is that the piston and cylinder are sealed by a ring or ring that moves along the piston housing, but in the structure of the plunger pumps the location of the ring or The rim is on the cylinder and not movable.

What are the features and applications of the planter pump? 
A: Plunger pumps have low capacity thresholds, but can also increase the fluid outlet pressure significantly. We also need to know that the fluid flow in the plunger pumps is non-uniform. Plunger pumps are used in places where low volume but high pressure fluid needs to be replaced (such as a car wash). But the important thing to know about the use of plunger pumps is that since the plunger and piston pumps, like gear pumps, are positive displacement pumps, if the outlet valve of these pumps is definitely closed to the pump and Installations attached to it will cause serious damage.

What are the Types of Piston or Plunger Water Pumps? 
A: Piston pumps are generally divided into four categories. The four categories are: 
pumps , directly or indirectly, simple or duplex pump, pump or Dual Universal, and power pumps.

How does a direct piston water pump work? 
Answer: The location of the piston water pump is located at the bottom of the piston fluid pump, or pump-driven pump, which moves directly with the pump rod to carry the piston.

What is a single suction piston pump? 
A: Single suction pumps are suction or suction. The suction operation is to fill the water cylinder to its maximum value on one side. After suction the fluid is driven outward by the pump plunger with a recoil, thus the cylinder begins to discharge from the same direction. In the return suction, the direction of the cylinder discharged in the previous suction is filled and discharged in the opposite direction.

What is a duplex piston pump and how does it work?

A: In the definition of a duplex water pump, it can be said that when two simple pumps are mounted on a stand, they form a duplex piston water pump. The design and operation of the pistons or plungers in the duplex pump are designed so that if one piston expands and rises, the other piston is positioned at the lowest or the lowest possible point in the pump. This operation at the duplex pump will make the water capacity of these pumps twice as high as that of the simple pump.

What is the basis of a piston water pump?

A: The centrifugal pump or centrifugal pump rotates, but the piston pump converts the crankshaft into a high-speed reciprocating motion by reducing gears. The plunger movement of the piston pump (carwash pump) is through fast motion. Plungers in high pressure piston water pumps are usually single-stroke and work through three plungers. The use of three plungers or more in the piston pumps causes the pulse flow to be significantly reduced.

What are the Benefits of a Piston Pump? 
A: Piston pumps (carwash pumps) are widely used in that they are capable of being upgraded to high pressure pumps. These pumps are also dual-purpose, meaning they can work with both turbines and electric motors. These pumps are better and more used than planter pumps because pumps need to be permanently inspected and repaired due to the need for steam to operate.

Compare the piston pump with the centrifugal pump.                                                               
Answer: Compared to the piston pump and the centrifugal pump, it can be said that the piston pump is capable of producing high pressure at low discharge and is therefore more used in a car wash. However, piston pumps are less expensive than centrifugal pumps because they are expensive and replace less discharge.

How Many Piston Pumps Are There? 
Piston pumps generally have several uses in the market, some of which are mentioned later: 
1- Large and industrial car washes (
 200 bar pressure) 
2- Household car washes (from 70
 bar to 170 bar pressure) 
3- Gasoline Piston Pump (Gas Car Wash) 
4- Gas Oil Piston Pump 
5- Sprayer Pump: For farmers, the 80
 bar piston pump is generally used and the 40 bar piston pump is commonly used.

What is the difference between a piston pump and a planter?

Answer: Plunger pumps generally work more slowly and, because of the fluid volume, pressurizes the material inside the pump and directs it to discharge, but the piston pump sweeps the entire fluid and drives it out. The high pressure plunger pump cannot produce such high pressure. And they also have a longer life span. The plunger pumps are less depreciable.




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