What are the characteristic curves of the pumps?
Curves relating total head, efficiency, power, and net positive suction head required (NPSHR) to discharge or pump capacity (Q) are utilized to describe the operating properties (characteristics) of a pump. This set of four curves is known as the pump characteristic curves or pump performance curves.
What are the parts of a reciprocating pump?
The main components of reciprocating pump are as follows:
- Suction Pipe.
- Suction Valve.
- Delivery Pipe.
- Delivery Valve.
- Cylinder.
- Piston and Piston Rod.
- Crank and Connecting Rod.
- Strainer.
What are the different types of pump curves?
Pump curves fall into several categories and can represent different aspects of the pump’s performance. The most common types of pump curves include: pump family selection, the manufacturer’s published curve, certified pump curve and system curve.
What is the use of characteristic curve?
A curve plotted on a graph from two axes, exposure and density, used to describe the characteristics and performance of sensitive emulsions. A characteristic curve is a graph of the relationship between the amount of exposure given a film and it’s corresponding density after processing.
What are the 5 curves that can be found on a pump curve?
Curves typically include performance metrics based on pressure, flow, horsepower, impeller trim, and Net Positive Suction Head Required (NPSHr).
How do you read pump characteristic curve?
The Pump curve shows the Flowrate range on the horizontal scale. As standard the Flowrate is from zero flow to 20% past the Best Efficiency Flow. The first point on the curve at zero flow is referred to as “Shut Off” and the last point at maximum flow is “Run Out”.
Which is not a part of reciprocating pump?
Explanation: A reciprocating pump is a class of a positive displacement pump. It includes a piston pump, plunger and a diaphragm pump. It has a long life. Turbine blades are not an example of the reciprocating pump.
How the reciprocating displacement pump works and describes the characteristics?
A Reciprocating Positive Displacement pump works by the repeated back-and-forth movement (strokes) of either a piston, plunger or diaphragm (Figure 1). These cycles are called reciprocation.
How do you find the characteristic curve?
For a PDE a(x,y,z)zx+b(x,y,z)zy=c(x,y,z), you can obtain the characteristic by solving the ODE’s dxds=a(x,y,z), dyds=b(x,y,z) dzds=c(x,y,z).
What is system curve in pump?
A system curve, as shown in Figure 2, is a graphical representation of the pump head that is required to move fluid through a piping system at various flow rates. The system curve helps quantify the resistance in a system due to friction and elevation change over the range of flows.
What are two of the three main items shown on a pump curve?
What does a pump curve show?
- Application.
- Liquid being pumped.
- Viscosity and temperature.
- Flow rate required.
- Pressure required.
- Voltage and frequency.
What are the characteristic curves?
A characteristic curve is a graph of the relationship between the amount of exposure given a film and it’s corresponding density after processing. 1. A typical film characteristic curve is made by plotting density produced, against the log of exposure given (Log E).
What are the main components of reciprocating pump?
The main components of reciprocating pump are as follows: Suction Pipe. Suction Valve. Delivery Pipe. Delivery Valve. Cylinder. Piston and Piston Rod.
What is the indicator diagram of reciprocating pump?
As the name suggests, the indicator diagram means a graph that mainly indicates pressure head and piston displacement from the inner dead center in one revolution of the crank. The work done by a reciprocating pump can be easily calculated with the help of an indicator diagram.
What is the advantage of reciprocating pump over centrifugal pump?
No priming process is required in this pump except few conditions and this a one of the main advantages over centrifugal pumps. Reciprocating Pump provides a high suction lift since it can create high negative pressure in the cylinder. Air can be used as the working fluid in reciprocating pump.
What are the common problems of reciprocating pumps?
In short, this problem will affect the working principle of reciprocating pumps. It can clog the suction pipe as well as choked the delivery. To avert this problem, a wire mesh is provided at the end of the suction pipe to prevent the entrance of these foreign particles from the sump to the cylinder.