Gate valve how to process and valve sealing cooperation?
The main use of sealed gate valve:Special 1, petroleum and chemical: rotating ball valve in petrochemical industry using high pressure, high temperature, full of flammable and explosive, general acid-base and corrosive medium, has good sealing performance, corrosion resistance, light and open and close, can automatically cut off the valve surface fouling, suitable for crude oil, heavy oil and medium transport petroleum cracking, food production process. (oil, gas, gas, water, etc).Special 2, blast furnace gas, gas flow head: two-way rotating ball valve sealing by Cr - Mn - Si hard alloy, refractory explosion-proof anti-static, sealing high temperature 560 DEG C, the anti-corrosion and anti bite ability is 6 times more than the stainless steel seal pair, especially suitable for pipeline gas, coke oven gas, water gas liquefied gas, natural gas transportation and pressure gate station use (blast furnace gas, natural gas, gas etc.).
Ensure the tightness of the installation must pay attention to the content:The manual valve opening and closing parts is the gate, the gate bias and bias perpendicular to fluid activity, gate valve can be fully open and fully closed, the gate has two sealing surface, the most common mode of gate valve sealing surface to form two wedge, the wedge angle varies with the valve parameters, usually 50, wedge gate type valve can be made into a group, called the rigid gate; can also be made into a gate trace deformation, to improve its technology, on the sealing surface angle bred in the processing process mistakes, this gate is called the flexible gate, gate valve closed, the sealing surface can only rely on media pressure to seal, that is dependent on the medium the pressure of the sealing surface of the ram pressure to the other side of the seat to ensure the sealing surface of the seal, which is self sealing. Large part of the valve is forced to adopt the seal, that is, when the valve closed, to rely on external force, forcing the gate pressure to the seat, to ensure the sealing surface sealing.
