CPVC Respiration valve

CPVC (Chlorinated Polyvinyl Chloride) is a thermoplastic material that can be used in a wide range of applications, including piping systems for hot and cold water distribution, chemical transportation, and industrial liquid handling.
UPVC (Unplasticized Polyvinyl Chloride) is also a thermoplastic material which is known for its high strength, corrosion resistance, and durability. It is often used in construction and building applications, such as windows and door frames, and in industrial applications, such as piping systems.
FRPP (Fiberglass Reinforced Polypropylene) is a composite material made of polypropylene reinforced with fiberglass. It is known for its strength, durability, and resistance to corrosion and high temperatures. It is often used in industrial and commercial applications, such as in chemical and petrochemical plants.
Regarding your question of Circular Gate Valve, it's a type of valve that controls the flow of fluids by opening or closing a circular gate which is inside the valve. The gate is raised to allow flow, and lowered to stop it. Circular gate valves are often used in industrial and commercial applications, such as in piping systems for water, oil, gas, and other fluids.