A flow meter is an instrument used to measure linear, nonlinear, mass or volumetric flow rate of a liquid or a gas.
Selecting a Flow Meter The basis of good flow meter selection is a clear understanding of the requirements of the particular application. Therefore, time should be invested in fully evaluating the nature of the process fluid and of the overall installation. Here are some key questions which need to answered before selecting a flow meter:

• What is the fluid being measured by the flow meter or flow meters (air,water,etc…)?

• Do you require rate measurement and/or totalization from the flow meter?

• If the liquid is not water, what viscosity is the liquid?

• Is the fluid clean?

• Do you require a local display on the flow meter or do you need an electronic signal output?

• What is the minimum and maximum flow rate for the flow meter?

• What is the minimum and maximum process pressure?

• What is the minimum and maximum process temperature?

• Is the fluid chemically compatible with the flow meter wetted parts?

• If this is a process application, what is the size of the pipe?

A refrigerated air dryer is the most commonly used. type of compressed air dryer for most plant applications for the drying of plant air and other utility gases like hydrogen gas, nitrogen drying etc. where a dew point of (+2) Deg. C. at line pressure i.e. (-22 )Deg. C. at atmospheric pressure) is an acceptable norm.

As much as 2300 gallons of moisture can be removed from a100 cfm pneumatic system operating at 100 psi in 12 months of 3 shift operation, moisture which without a refrigerant air dryer, would have passed through the delicate pneumatic equipments & instruments

1.Refrigeration Compressor
2.Refrigerant Condenser
3.Electric Fan
4.Liquid Receiver
5.Thermostatic Expansion Valve
6.Air -to- Air heat Exchanger
7.Freon -to- Air Heat Exchanger
8.Centrifugal Condensate Separator
9.Accumulator
10.Moisture Removal Filter
11.By-Pass Valve
12.Automatic Condensate Trap i. e. auto drain
13.Press for Fan (AC only )