Such as the title, is the mouth and grease, valve bottom drain valve was raised, however, is a small valve 90 degree rotation control, and pneumatic valve pressure tube small valve the same, which valve is used for what?
If it is on the top of the valve body and the evacuation line of the small valve is vertical upwards, it should be the air defense valve.If it is at the bottom of the valve, the drain line of the small valve is horizontal or downward, and that should be the discharge gate. If the small valve is located in the middle part of the valve body, then it is mostly oiling.
That's for pressure relief. When the valve is closed, the inner chamber of the valve will assemble pressure to remove the pressure by opening the valve. The ball valve with this valve is usually fixed ball valve, and the fixed ball valve sealed by the seat floating to seal. When the pressure on the inner chamber is removed, the inlet and the outlet of the compression seat are stressed and sealed more easily. Normally this is the DBB (double block and drain) ball valve that will be installed.
Ball valve on the role of a small valve is: pressure relief, that is, through the control of the valve to achieve the control of ball valve pressure inside the body size.Valve is a control component in the fluid delivery system. It has the functions of closing, adjusting, guiding, preventing reverse flow, stabilizing voltage, shunting or overflow and releasing pressure. Valves used in fluid control systems, from the simplest stop valve to a very complex automatic control system used in a variety of valves, a wide range of varieties and specifications. Valves can be used to control air, water, steam, a variety of corrosive media, mud, oil, liquid metal and radioactive media and other types of fluid flow. The valve according to the material is divided into cast iron valves, cast steel valves, stainless steel valves (201, 304, 316), chrome molybdenum steel, chromium molybdenum vanadium steel valves, valve, dual phase steel valves, plastic valves, non-standard customized valve material etc..
