The function of the lightning arrester is to protect various electrical equipment in the power system from lightning electrical overvoltage, operating overvoltage, power frequency transient overvoltage and damage. The types of lightning arresters mainly include protection gaps, valve type lightning arresters and zinc oxide lightning arresters. The protection gap is mainly used to limit atmospheric overvoltage, and is generally used for protection of power distribution systems, lines, and substation incoming segments. Valve type lightning arrester and zinc oxide lightning protection device are used for protection of substations and power plants. The system is mainly used to limit atmospheric overvoltage in 500KV and below, and will also be used to limit internal overvoltage or internal in ultra high voltage system. Backup protection for overvoltage.
Globe Valves and angle valves are designed for throttling or regulating flow in commercial and industrial applications. Bronze, cast iron, or cast ductile iron materials. Threaded, flanged, or solder end connections.
Angle valves for use in commercial and industrial applications. Typical services include hot and cold water, HVAC, steam, compressed air, gas and other general utility services. Angle Valves, Angle Globe Valves, Brass Angle Valve, Zinc Angle Valve ZHEJIANG KINGSIR VALVE CO., LTD. , https://www.kingsirvalves.com
Vacuum angle valve is used for turn on or shut off the airflow in the vacuum pipeline, the applicable media is air and non-corrosive gases.
It has two structures, one is angle type and another is a 3-way type within an ISO-KF or ISO-F various flange end pre-pump port.
a) Small diameter (≤DN50) valve body are precision investment casting.
b) Large diameter (> DN50) valve body are molding shaped seamless steel or steel plate.
c) Bellows sealed structure can withstand 150ºCtemperature, metal sealed structure can withstand 450ºCtemperature.
d) Can install on any position to control the airflow in the vacuum pipeline, as an on-off valve purpose
Lightning protection function