PSL

The abbreviation PSL in the context of pneumatics and process control has two primary meanings, depending on the component and its application: 1. Pressure Switch Low (Most Common in P&ID) In piping and instrumentation diagrams (P&ID), PSL stands for: Pressure Switch Low Function: This is a safety and control device designed to monitor the air pressure in a pneumatic line or vessel. Action: It is configured to trip or activate a signal/alarm when the measured pressure drops below a specified minimum setpoint. Purpose: To protect equipment or processes from damage due to insufficient operating pressure. 2. Pneumatic Silencer/Muffler (Product Series) In product catalogs, PSL is often used as a series designation for: Pneumatic Silencer or Muffler Function: A porous component (often made of plastic or sintered bronze) attached to the exhaust port of a pneumatic valve or device. Action: It diffuses the rapidly escaping compressed air over a large surface area. Purpose: To reduce the noise level generated by the venting exhaust air and to filter out contaminants before they enter the system.