Control valve fire

Talking about the fire-retardant valve control valve on the fire resistance Beijing Institute of Chemical Technology Department of automation Wu Guoxi First, the importance of regulating valve fire In chemical, oil and other automation systems, in the event of a fire, if some of the equipment in the system can be cut off in a timely manner Flammable fluid leads to the fire environment, then you can avoid the fire directly from the fire area spread to all parts of the plant caused by a significant loss. Control valves are an important part of an automation system that is installed on-site to control the flow path so that it is the primary device that cuts off the flow path to prevent the flammable fluid from reaching the fire when it is ignited. It is crucial that it is on or off in the event of a fire. Since the regulator is controlled by the regulator in the control room and is not manually operated, the main features of the fire damper should be: to withstand short-term operation when tempered, or to minimize leakage when it is time to close. Valve fire resistance should be seen as a very desirable performance to consider, hoping to arouse the attention of the personnel concerned. Second, the standard valve fire What kind of valve is the fire valve? Foreign referred to the fire-resistant valve (fire-safe valve), the definition of foreign fire on the valve a lot of non-uniform, this definition is still lacking in the industry clearly defined. To date, there is still no single test or definition that clearly identifies whether a valve is fire proof. Many industrial societies, oil companies, insurance companies, valve manufacturers, and relevant agencies in the United Kingdom and the United States already have various test methods. However, the type of test valve and the main test specifications vary with the test method. The debate over combustion valve tests continues, with some trying to combine two or more methods into one complete method, but still not conclusive. How to accurately define the fire protection valve? This is exactly the problem we are going to study. First, we should study the problem of valve seat standard. Some people think that in the fire will not melt the metal gate valve and globe valve (globe valve) is a fire damper. These valves are designed and constructed to ensure that they are metal-to-metal contact both before and after the fire, thus preventing flammable fluids from entering the fire. However, when the metal seat is operated before the fire, the sealing property is not good. Due to the small amount of leakage, it is also permitted in most fire protection standards that have been developed.

CNC Four Axis Machining

CNC four axis machining, as the name suggests, is an addition of one axis to the three axis CNC, so that the processing of multiple processes can be completed in one clamping process. However, four-axis are generally used in places where three-axis machine tools cannot or are difficult to process, such as parts that cannot be processed by depth and angle limits. At present, products such as worms, fan blades, etc. are common. Using four-axis CNC to process such products is more Three-axis CNC machining efficiency and accuracy are higher.

SCZY has many three-axis, four-axis, five-axis CNC milling machines, as well as lathes, grinders, EDM, wire cutting and other equipment, which can meet the different requirements of different customers. The highest precision we can achieve is ±0.002mm (specifically Depending on the product material and structure), the materials we process include steel, iron, copper, aluminum and plastic materials, etc. Our products are widely used in navigation, aviation, automobile, machinery, equipment, automation, mold accessories and so on. Pls check out the pictures below:

Cnc Four Axis Machining,Cnc Four Axis Machining Parts,Cnc Machined Stainless Steel Fittings,Cnc Four Axis Machining Metal,Four-axis Machining Center

Shenzhen SCZY Technology Co.,Ltd , https://www.szsczycasting.com