The condition of a filter element should be verified based on the quality of the compressed air. The contaminated (dirty) filter element can cause pressure, flow and performance drop. The filter element should be replaced every six months according to the manufacturer's recommendations to ensure the correct operation of the pneumatic system.
The abbreviation FRL stands for a compressed air preparation unit consisting of: F – filter – removes contaminating particles and moisture (condensate) from a compressed air system; R – regulator – reduces and maintains pressure at a required level; L – lubricator – injects a lubricant (oil) into an application that requires lubrication.
Pneumatic dampers are mounted in vent connections of valves and unused connections of cylinders to reduce noise and protect the system from external contamination.
According to ISO 5599 standard, valve schematic diagrams are designated with numbers (previously letters). Example of designation: 5/2 monostable valve, solenoid operated with pneumatic assistance (with external pilot supply), spring return: 1 - supply connection port,2, 4 - working or outlet connection ports,3, 5 - outlet to the atmosphere (venting connection ports),12, 14 - control [...]
Monostable valve - continuous control - when a control signal disappears, a spring forces it to return to its resting position. Bistable valve - impulse control - after a control signal disappears, it remains in its position (no spring). For example, electrically controlled monostable valves have one solenoid on one side and bistable valves have [...]
Directional control valves are identified by the number of flow paths (number of connections) and the number of positions (number of square boxes on a valve schematic diagram). In the example below, the pneumatically controlled valve is a 3-way/2-position valve in a resting position (without control signal) normally closed NC: Normally Closed):
Directional control valves (distribution manifolds) control the direction of compressed air flow. In a pneumatic system, they usually work as controllers for actuators, and they switch on and switch off the operation of, for example, a pneumatic cylinder.
Electrically heated hoses are often used in extruders, Hot Melt machines, wrap-around machines, edge banders, as well as flue gas analysers.
Only specially designed heated hoses with heaters and sensors in "Ex" version can operate in explosive zones.
A heated hose is selected individually for each specific application. Therefore, in order to make the right selection, it is necessary to provide information about the medium, working pressure, temperature to be maintained, movements performed, supply voltage, required temperature sensor, and hose parameters such as diameter, length, and type of fittings.
