What is the use of strainer?
Strainer can be defined as a pipe fitting through which liquid is passed for purification, filtering or separation from solid matter; anything used to strain a liquid; any device functioning as a sieve or filter used to prevent solid bodies from mixing in a liquid stream or flowline.
How many types of strainers are there?
How do you determine strainer mesh size?
Take one square inch of filtering material (screen) and count the holes in it. If you have 80 openings in that area, then you have an 80-mesh screen. If you have 200, then it is 200-mesh and so forth. Therefore, the higher the mesh number, the smaller the particles that are filtered.
How do you calculate pressure drop across a strainer?
The pressure loss across a strainer can be calculated using the system’s flow rate and the Cv factor for that strainer. For example, a 1″ Model 72 simplex strainer with a perforated basket has a Cv factor of 22.5. In water service with a 30 gpm flow rate, it will have a 1.7 psi pressure drop (30 22.5)2 = 1.7.
What is pressure drop in air filter?
What is a pressure drop? Pressure drop is defined as the change in pressure from one defined area to another. In HVAC, this is referring to the change in static pressure as air moves through your air filters. Put simpler, it’s how much your air filter restricts airflow.
How do you calculate filter pressure drop?
The pressure loss across a strainer or filter can be calculated using the system’s flow rate and the Cv factor for that strainer or filter. For example, a 1 ” strainer with a Cv factor of 8 will have a 4 psi pressure loss in a system with a 16 gpm flow rate: (16 ÷ 8) 2 = 4.
What is initial pressure drop?
Initial Pressure Drop (sometimes called “Initial Resistance”) is the Pressure Drop caused by a brand new filter, a filter which has never been used. The Initial Pressure Drop of a filter will vary, based on the type, thickness and efficiency of the filter.
What is the pressure drop across a HEPA filter?
HEPA and ULPA filters are monitored for pressure drop across the filter media. Once the pressure drop becomes unacceptable, the filter must be replaced. The typical pressure drop for a clean filter is 25 millimeters (mm) of water column (1 inches (in.)
How do you measure static pressure?
To determine operating total external static pressure. Measure pressures where air enters and leaves packaged equipment. Add the two readings together to find total external static pressure. You can still measure the pressure drop of the coil and filter to check for blockage.
What is a good static pressure?
Static Pressure Diagnostics Good blood pressure is 120 over 80 by most standards. High blood pressure isn’t good and usually indicates excessive restrictions in your arteries.
What is ideal static pressure in HVAC?
The pressure in return and supply ducts should not exceed 20 percent of the fan’s rated capacity. This is the same value used in gauging the pressure drop of an air filter. On a fan rated at 0.5 inch of wc, you wouldn’t want to see any more pressure than 0.1 inch of wc in your supply and return duct pressure reading.
What does CFM vs static pressure mean?
Most agricultural ventilation fans operate at 0.05 to 0.15 in. water static pressure and deliver a given airflow rate in cubic feet per minute (cfm) at a particular static pressure. The performance of a fan is defined as the amount of airflow in cfm at a given static pressure.
How do you convert CFM to static pressure?
To calculate Air Flow in Cubic Feet per Minute (CFM), determine the Flow Velocity in feet per minute, then multiply this figure by the Duct Cross Sectional Area.
How do I calculate cfm?
Start with the total volume of air (in cubic feet), divide by the exchange rate (how quickly you want to replace the air), and the result is the total CFM you need for your system.
How many CFM is a kW?
The kilowatts unit number 0.048 kW converts to 1 atm cfm, one atmosphere cubic foot per minute.
How many CFM do I need for a leaf blower?
Generally, electric leaf blowers have a CFM falling somewhere from just under 200 to 400. If your property is an acre or more, you will probably want a leaf blower with a CFM between 400 to 700. These machines are noisier and obviously more powerful with the ability to handle both wet and dry debris.
How many CFM are in a ton?
Why is 400 cfm a ton?
400 CFM per ton of air conditioning: The higher CFM is required to remove the sensible heat from the environment. However, if you have an environment that has high humidity then 350 CFM per ton is better. At the lower CFM the coil is colder and the air spends more time on the coil and increases dehumidification.
How many kW is 1 ton?
Refrigeration tons (RT) to kilowatts (kW) power conversion calculator and how to convert….Tons to kW conversion table.Power (ton)Power (kW)0.1 RT0.RT1 RT3.5168525 RT10 RTRT100 RTRT1 more row