Fire and anti-static ball valve is a kind of anti-static and anti-static device that can be used in natural gas, artificial coal to gas, liquefied gas, urban gas and non corrosive gas pipelines. It has anti-static and fire prevention devices, that is, a conductive spring is set between the ball and the valve rod, and between the valve rod and the valve body, so that the static electricity generated during the opening process of the valve can be introduced into the underground through the set static electricity channel, so as to achieve the purpose of removing static electricity. Avoid static ignition to ignite flammable media to ensure system safety. The fire-proof device, that is, the ball valve is designed with double seals. When the soft sealing gasket melts due to high temperature, the valve core ball is again designed with a hard seal at right angles behind the soft seal, forming a sealing relationship again.
Compared with conventional ordinary ball valves, fire-proof and anti-static ball valves are widely used in many industries, and their safety performance is also improved. For occasions prone to fire, they can effectively prevent internal leakage. The realization of this function mainly depends on the sealing ring of the ball valve. This sealing ring belongs to double-layer seal, one layer of soft seal and one layer of metal seal. When the soft sealing layer is burned and damaged, the metal seal can further fill the void, It plays a key backup sealing role and can prevent a large amount of medium leakage and fire spread to a certain extent.
When the fire-proof and anti-static ball valve is switched on and off, there will be mutual friction between the ball and the valve seat, and the static electricity generated by friction will gather on the ball. This is not allowed for the ball valve used in gas, fuel oil and chemical pipelines, which may cause pipeline explosion accidents. The ball valve with anti-static structure is equipped with an electrostatic export device, which can export the electrostatic charge accumulated on the ball at the first time, Effectively ensure the safe operation of pipelines; Generally, the connection mode of elastic elements is usually adopted at home and abroad, and the resistance between the ball and the valve body and between the valve rod and the ball is less than 12VDC and less than 10 ohms according to the standard.