General Compression tube fittings are double ferrule type fittings which provide leak-proof, torque-free seals at the tubing connection.  They provide safety and eliminates hazardous leaks of fluids in instrumentation field for a process, pressure, hydraulic and other applicable tubing systems.

They are used to transfer, measure and control system flow, pressure, temperature and provide system calibration. Instrumentation components are critical to the operations of the plant or a product grouping. Fittings, valves, and tubing are the veins and arteries of the instrumentation system.

Process measurement and control employs a wide array of gauges and instruments that may be permanently or temporarily connected to a piping system. Providing controlled isolation and connection of these instruments is the function of what are generically referred to as “instrument valves” or “gauge valves”.

Valves are technically fittings, but are usually discussed as a separate category. In an open valve, fluid flows in a direction from higher pressure to lower pressure. … Modern control valves may regulate pressure or flow downstream and operate on sophisticated automation systems

An instrument root valve is utilized for isolation of pressure measures, orifice plates, flush rings and different measurement instruments. The instrument valve typically “lives” in the vacant position and is close just to isolate the instrument for administration or replacement.

There are two types by which valves can be operated: Manually or Using Actuator. The different types of actuators are available such as pneumatic, hydraulic, electric, etc.