German DANFOSS valves DANFOSS models DANFOSS prices

DANFOSS valves are special valves in which the closing member remains normally closed under external force. When the pressure of the medium in the equipment or pipeline rises above the specified value, the valve prevents the medium pressure in the pipeline or equipment from exceeding the specified limit by discharging the medium to the outside of the system. Safety valves belong to the category of automatic valves and are mainly used on boilers, pressure vessels, and pipelines to control pressure so that it does not exceed the specified value, playing an important protective role for personal safety and equipment operation. Note: Safety valves must undergo pressure testing before use.

DANFOSS valve functions and applications

Safety valves provide safety protection in the system. When the system pressure exceeds the specified value, the safety valve opens and discharges part of the gas/fluid in the system into the atmosphere or outside the pipeline, ensuring that the system pressure does not exceed the allowable value, thereby preventing accidents caused by excessive pressure.

DANFOSS valve assembly precautions

Cleaned components must be stored in a sealed manner for installation. The installation process requires the following: 1) The installation workshop must be kept clean, or a temporary clean area must be set up, for example, using newly purchased striped tarpaulins or plastic films, to prevent dust from entering during installation. 2) Assembly workers must wear clean pure cotton work uniforms and pure cotton caps, with no hair exposed. They must wear clean shoes and latex gloves, and perform degreasing. 3) Tools used for assembly must be degreased and cleaned before assembly to ensure cleanliness.

DANFOSS valve classification

Safety valves are mainly divided into two categories: spring-loaded and lever-operated. In spring-loaded types, the sealing between the valve disc and valve seat relies on the force of the spring. Lever-operated types rely on the force of the lever and weight. To meet high-capacity requirements, there is also a pulse-type safety valve, also known as a pilot-operated safety valve, which consists of a main safety valve and an auxiliary valve. When the medium pressure in the pipeline exceeds the specified pressure value, the auxiliary valve opens first, allowing the medium to enter the main safety valve through the guide tube and open the main safety valve, thereby reducing the increased medium pressure. The discharge capacity of a safety valve is determined by the diameter of the valve seat and the opening height of the valve disc. It can also be divided into two types: for micro-lift types, the opening height is (1/20) to (1/40) of the inner diameter of the valve seat; for full-lift types, it is (1/3) to (1/4). In addition, depending on usage requirements, there are closed and open types. Closed types prevent the discharged medium from leaking out, directing it entirely through the specified outlet, and are generally used for toxic and corrosive media. Open types are generally used for non-toxic or non-corrosive media.

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