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What is the difference between suction lift and suction head?
Suction lift is only negative. Suction head is positive or negative.Suction head is the distance between the surface of the liquid being pumped and the centerline of the pump. It can be positive or negative, and it can be affected by pressure or vacuum on the surface of the fluid. A negative suction head is also called suction lift.Example 1: A D/A under 15 psig is set 20 feet above the feed pump the effective suction head is 54 feet. (15 psig is equivalent to 34 feet of water).Example 2: A Condenser hotwell under 28 inches of vacuum (Hg) is set 16 feet above the suction of a propeller pump. The effective suction head (lift) is -15 feet.* (28"Hg = - 31 feet of water)Example 3: A sump pump is set 4 feet below the surface of the well. The effective suction head is 4 feet.*Note: Suction lift is only effective to a maximum of 21 feet, and 15 feet for hot water depending on temperature and pump slip.
How does pump-down works in refrigeration?
When the call for cooling is satisfied, a solenoid valve closes, stopping the flow of refrigerant into the metering device. A pressure switch that controls the compressor will keep the compressor running until the pressure in the suction line reaches a low pressure. Usually this is just above 0 psig. When a call for cooling opens the solenoid valve, the pressure in the suction line starts to rise. When it reaches the set-point of the pressure switch, the compressor will start again. As a reminder. only trained and qualified personnel should work on refrigeration systems. There are many things that can be dangerous or possibly lethal while working on refrigerant systems.
What is a single stage heat pump?
A heatpump that only has one stage of heat and one stage of cool.
What is mean by economiser recirculation line?
Since sufficient feedwater is not supplied into the economizer though the heat is absorbed from flue gas at the boiler start-up and low load operation, steaming may occur in the economizer. Therefore the economizer recirculation line is provided between the furnace downcomer and the economizer inlet feedwater piping. This line provides the recirculation flow between the drum, the downcomer and the economizer so as to prevent steaming in the economizer. Economizer recirculation valve is only opened at initial stage of the boiler start-up.
You have low suction and a cool discharge line why is that?
ok..in my experience there is not one only reason why this happen...1st. if this air con have repair before or install a new compressor and the supply power is 3phase the reason why this happen is improper wiring.2nd. what type of aircon? window type or split unit or centralize?3rd. if the unit is split type.. there is a type of splite type dont have a filter drier.. that's why the discharge line make it cool.. there is many reason why this happen in air con..ok i just share my knowledge.. im mark angelo manuel.. from philippince..You need to check the freon level first because it low............
Where is the only true suction line?
The line coming from the Discharge Line, which comes from the Compressor into the 4-Way Valve
Why does the heat control in my 2001 Olds Bravada only heat when it's maxed out and cold when it's moved just off of the max position?
vaccuum controled leak in line put switch half way no noise listen for suction
What is the difference between suction lift and suction head?
Suction lift is only negative. Suction head is positive or negative.Suction head is the distance between the surface of the liquid being pumped and the centerline of the pump. It can be positive or negative, and it can be affected by pressure or vacuum on the surface of the fluid. A negative suction head is also called suction lift.Example 1: A D/A under 15 psig is set 20 feet above the feed pump the effective suction head is 54 feet. (15 psig is equivalent to 34 feet of water).Example 2: A Condenser hotwell under 28 inches of vacuum (Hg) is set 16 feet above the suction of a propeller pump. The effective suction head (lift) is -15 feet.* (28"Hg = - 31 feet of water)Example 3: A sump pump is set 4 feet below the surface of the well. The effective suction head is 4 feet.*Note: Suction lift is only effective to a maximum of 21 feet, and 15 feet for hot water depending on temperature and pump slip.
When is the low suction side of the ac system?
There are two coolant lines that come from the compressor. One line goes to the condenser (radiator looking thing in front of the engine radiator). That line is the High side. From the radiator, that line goes through the firewall. The OTHER line that goes to the comressor is the LOW side, or some call it the suction side. Somewhere along that line you should be able to find a refrigerant test port. The low side will only be low when the compressor is running.
Why can't you reverse a liquid line filter drier?
The type we used to use on the job, had filter material inside of it which would flow down the suction line if you reversed it. It was made to only filter in the specified flow direction.
How do you remedy a fuel vapor lock problem?
Vapor lock does not occur in modern vehicles because they all use an in tank pump system, it was seen in the older style suction pumps that were located on the engine, but in those cases moving the fuel lines away from heat sources would often remedy the situation, another way is to install an electric fuel pump to the frame right at the fuel tank to reduce the amount of fuel line under suction, it is only in the suction area that vapor lock can occur.
How many tentacles have suction cups on a squid?
yes of course
My car will vapor lock in extreme heat gas line is insulated . why does it do this?
Vapor lock can only happen in a suction type fuel delivery system, that is when the fuel pump is located near the engine. High temperature causes the fuel in the line to turn to vapor in a vacuum environment and the pump cannot pull the fuel past the air pocket. ( pump loses suction at the air pocket ) Modern fuel pumps are located in the fuel tank which eliminates the problem completely. If you do have a fuel pump that is not located in the tank the line is most likely passing close to a heat source somewhere between the pump and the tank, there will be no issues from the pump to the carburetor since it is a pressure or pump type after the pump and any air will be pushed by the fuel behind it.
Does nasogastric tube suction reduc potassium?
Only on Tuesdays
When only two device are connected across WAN link it's called?
point-to-point link, dedicated line, permanent circuit
Necessity of heat pumps?
Heat pumps normally work by a suction force that will take out the heat from an enclosed area to displace it in another area. They are often used for electrical equipment, especially in hot regions like tropical climates.
Wet dry vac suction?
The standard wet dry vaccum will actually retain its suction for a long time. They are also easy to clean out. They only require to be taken apart, and dumped out.
