Relief valve Series There are two main types of safety valve structure: spring type and lever type. Spring type refers to the action of spring on the sealing of disc and seat. Leverage is the action of lever and hammer. With the need of large capacity, there is another kind of pulse safety…
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There are two main types of safety valve structure: spring type and lever type. Spring type refers to the action of spring on the sealing of disc and seat. Leverage is the action of lever and hammer. With the need of large capacity, there is another kind of pulse safety valve, also known as pilot safety valve, which is composed of main safety valve and auxiliary valve. When the medium pressure in the pipeline exceeds the prescribed pressure value, the auxiliary valve opens first, and the medium enters the main safety valve along the conduit, and the main safety valve opens, which reduces the increased medium pressure.
The discharge of safety valve depends on the seat diameter and the opening height of the disc. It can also be divided into two types: the micro-opening height is (1/20) ~ (1/40) of the seat inner diameter, and the full-opening height is (1/3) ~ (1/4).
In addition, with the use of different requirements, there are closed and non-closed. The enclosed discharge medium is not leaked, all along the prescribed outlet discharge, generally used for toxic and corrosive media. Unenclosed type is generally used in non-toxic or non-corrosive media.