Pressure Relief Valve 742X (DN40~DN800)

According to the working pressure of the system, it can automatically open and close, generally installed in the closed system equipment or the pipeline protection system security. The relief valve is also known as the safety valve based on the working pressure of the system. It is usually installed in the equipment of the closed system or the protection system of the pipe. When the pressure in the equipment or pipeline exceeds pressure relief valve set pressure, pressure relief automatically open, ensure that the equipment and piping within the medium pressure in the set pressure, protect the equipment and pipeline, prevent accidents. There are two main types of relief valve structure: spring and lever type. Spring is the action of the valve and seat sealing against the spring. Leverage is the force of leverage and weight. With the need of large capacity, there is also an impulse relief valve, also known as the pilot relief valve, which consists of main relief valve and auxiliary valve. When the medium pressure in the pipe exceeds the specified pressure value, the auxiliary valve opens first, the medium runs along the catheter into the main relief valve, and the main relief valve is opened to lower the pressure of the increased medium. Safety pressure limit is reached when can open automatically, reduce the pressure to ensure safety. The most common is the home of the pressure relief valve on the pressure cooker, he is a simple mechanical pressure relief, and heating and air conditioning system pressure relief valve, water floating pressure relief valve. In the system pressure is more than design rules, the pressure release part of the system normal work of a valve.