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Inches of vacuum. Thirty inches of vacuum is generally considered a complete vacuum when evacuating a system before purging it with nitrogen gas to completely dry the system out before recharging it with whatever refrigerant is to be used. This assumes that what ever problem generated the need for the system to evacuated has been resolved.

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โˆ™ 2005-10-30 20:29:11
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Q: What is another term for suction pressure?
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Is suction pressure another word for evaporator saturation pressure?


How do you calculate suction pressure for air theoretically?

Air has a pressure, but not a suction pressure. Air pressure is measured with a barometer, you do not calculate it. Suction pressure is a concept which applies to a pump. Suction pressure = static pressure + surface pressure - vapour pressure - friction pressure.

What is the function of the suction valve?

the suction valve is transfered fluid one pipe to another pipe at a specific pressure and quantity.

What causes suction?

Suction is caused by an are of negative pressure.

What is suction pressure and discharge pressure?

Answer: The terms suction and discharge are the terms refer to hydraulics. In hydraulics if the the liquid has to be lifted or pumped to the usage area the hydraulic pump will be used . This pump will have to functions that is first suction to lift the fluid and the discharge or delivery . The familiar words in pair are lift and discharge; suction and discharge. The specification of pump for these terms are suction head and discharge head.AnswerThe suction pressure refers to the pressure of the referigerant being "sucked" back into the compressor. The suction pressure is a critical variable in ensuring the accuracy of the refrigerant charge, along with the tepmerature of that line as well. The "superheat", or heat added to the vapor in that line can be monitored in this manner.You have not mention which suction pressure... Actually Where ever the suction is presented that pressure is called suction pressure.... and suction pressure in practical cases normally always less that atmospheric pressure and in case of delivery pressure it is oppositeSaying that suction pressure is " the pressure of the referigerant being "sucked" back into the compressor " is not accurate.Simply , the suction pressure of a pump is the absolute pressure of a fluid , measured at the inlet of the pump ( in your answer , the pump is the compressor , and the fluid is whatever refrigerant. )The discharge pressure , is the absolute pressure of the liquid measured at the outlet of the pump.Obviously, the discharge pressure is usually bigger than suction pressure.

When an evaporater experiences a heat-load increase the suction pressure does what?

The suction pressure increase.

What is the science behind suction?

Suction is the reduction of pressure to create a force. In the instance of liquid, suction will cause the liquid to transfer from an area of higher pressure to the area of lower pressure.

What is the fan speed relationship to suction pressure?

for a given air conditioner: the faster the condenser (outdoor) fan the lower the suction pressure. the faster the evaporator (indoor) fan the higher the suction pressure.

What is another term for atmospheric pressure?

barometric pressure

What is negative suction?


What is another term for air pressure?

Atmospheric Pressureatmospheric pressure

Does low suction pressure have an effect on reciprocating compressors?

At very low suction pressure, the suction valves of reciprocating compressor will not work and there will be no gas in the cylinder during compression stroke, resulting some damage to the suction valves. If low suction pressure trip protection is not provided there can be some abnormal damage.

What will cause the suction pressure to rise?

head pressure

What is back pressure in a home ac unit?

Suction pressure

What is pressure in crankcase of reciprocating compressor?

...It will be what ever your suction pressure is.

Is the suction line the high side?

No, the liquid (discharge) line is the high pressure side. The suction line is the low pressure side.

What is the normal gauge pressure on the suction line of a running refrigerator?

It depends if it has suction cups on its shoes or not

Why does a suction cup stay on the window?

When you stick a suction cup on a window you force the air out of the suction cup and you create a high pressure vaccume keeping the suction cup on the window.

How do you determine what suction pressure should be in R22 air conditioning compressors suction line?

The proper suction pressure of any air conditioning or refrigeration system is determined by the type of refrigerant used and sometimes the amount of charge. : Suction pressure used is also directly related to the temperature required. : The temperature required in the evaporator relates to the pressure required in the suction line since, the fluid is at saturation in the evaporator. : Knowing the temperature required, use the fluid's saturation tables to find the corresponding pressure required.

What will happen if air enters the inside of a suction cup?

The suction cup will lose its attachment, unless it has an additional adhesive. Suction cups attached to a surface are held there by the pressure of the outside air, which is higher than the pressure under the cup. The suction cup is trying to return to its uncompressed condition, and pulls away from the surface, reducing the pressure under it.

What is the medical term meaning withdrawal by suction?

Aspiration means withdrawal of fluid by Vacuum or suction

What is another term for lower blood pressure reading?

"Lower" or diastolic blood pressure.

Why does a suction cup stay on a window?

air pressure.

What is the formula for finding suction pressure?


What is the property of refrigerant 404A?

what is suction pressure of r407a