Can Oubei electric ventilation regulating butterfly valve be normally closed manually? The electric ball valve is also specially designed with a step type device to prevent the valve stem from falling out. Under the protection of this device, the problem that the old ball valve is easy to fall out of the valve stem in some high-temperature and high-pressure environments has been fundamentally solved. The ball valve can work normally in the same place whether in fire or other critical environments.
、 If the valve is in a large throttling range, the back of the valve plate is prone to cavitation, which may damage the valve. Generally, the valve is used outside 15 °.
