What are eccentric reducers used for?
Eccentric reducers are used at the suction side of pumps to ensure air does not accumulate in the pipe. The gradual accumulation of air in a concentric reducer could result in a large bubble that could eventually cause the pump to stall or cause cavitation when drawn into the pump.
Can we use eccentric reducer in pump discharge?
Eccentric reducer is typically installed at the centrifugal process pump suction. Eccentric reducer in pump section pipeing minimized accumulation of any air or gas bubbles in the suction. If concentric reducer are used, their upper part allow accumulation of trace amounts of air or vapours at the pump section.
How many types of reducers are there?
There are 2 types of standard reducers available: concentric and eccentric reducers. The concentric one, which resembles a cone, is used to join pipe sections on the same axis. The eccentric type has an edge which is parallel to that of the connecting pipe, which allows it to align with one side of the inlet.
Which way do eccentric reducers go?
In piping liquids horizontally, eccentric reducers need the flat side up, because otherwise gasses can collect. But in piping vapors horizontally, eccentric reducers need the flat side down, because they need to avoid collecting liquids.
How do you calculate reducer?
Approximate weight of a butt welding reducer can be calculated based on its two outside diameters, length and wall thickness….Where :
- W = Weight in Kg.
- OD1 = Large Size Outside Diameter (mm)
- OD2 = Smaller Size Outside Diameter (mm)
- t = Wall Thickness (mm)
- H = End to End Dimension (mm)
What’s the difference between eccentric reducer and concentric?
Concentric reducers are used where the pipework is vertically installed and at the discharge side of pumps. Eccentric reducers are more often used when the pipework lays on a pipe rack. Because of the flat side, aligning and securely mounting the pipes to the rack is easier.
What is a reducer?
A reducer is a function that determines changes to an application’s state. It uses the action it receives to determine this change. Redux relies heavily on reducer functions that take the previous state and an action in order to execute the next state.
How is the offset distance calculated on an eccentric reducer?
How is the offset distance calculated on an eccentric reducer: Answer: The offset equals ½ x (Largest I.D. [inside diameter] – Smallest I.D.)
What is a half coupling?
Half Coupling is used for small bore branching from a vessel or large bore pipe. It can be threaded or socket type. It has a socket or thread end on only one side. A socket weld half coupling can be directly welded to large bore pipe, to make a branch connection.
When do you use an eccentric reducer on a pump?
Eccentric reducer. Horizontal liquid reducers are always eccentric, top flat (unless on control set, same as PV, TV, HV, LV) or (pipe rack), which prevents the build up of air bubbles in the system. Eccentric reducers are used at the suction side of pumps to ensure air does not accumulate in the pipe.
What kind of gas reducer is concentric or eccentric?
Horizontal gas reducers are always eccentric, bottom flat, which allows condensed water or oil to drain at low points. Reducers in vertical lines are generally concentric unless the layout dictates otherwise.
How do you add dots to eccentric reducer?
Complete the eccentric reducer by drawing a sloping LINE back to the top of the 10” line, connecting the two vertical ends. Add the reducer’s weld dots with the DONUT command.
Where is the pressure gauge on an eccentric reducer?
A pressure gauge should be located in the discharge line, upstream of the check and isolation valves. When a level switch for pump protection is installed in the discharge line, upstream of the block valves, ensure good access for maintenance of switch.
When to use eccentric reducer or concentric reducer?
On the pump suction line which handles slurry. Eccentric reducers with the flat side up are used for all pump suction lines (excluding pumps handling slurry) on horizontal lines. This way one can avoid air getting trapped inside the pipeline during initial venting through pump casing and will help in avoiding Cavitation.
Can a concentric reducer cause a pump to stall?
The gradual accumulation of air in a concentric reducer could result in a large bubble that could eventually cause the pump to stall or cause cavitation when drawn into the pump. Reducers in vertical lines are generally concentric unless the layout dictates otherwise.
A pressure gauge should be located in the discharge line, upstream of the check and isolation valves. When a level switch for pump protection is installed in the discharge line, upstream of the block valves, ensure good access for maintenance of switch.
What kind of steel is used for concentric reducers?
Concentric reducers used in ducting and ventilation systems are most commonly made from galvanised steel. Those fittings can also be made out of stainless steel – 304, 316 and 316L.