By holding the valve is in the valve body welding a metal jacket, the metal jacket by injecting steam, oil, cooling water, air, etc., cast steel valves, the valve body of the medium at room temperature, heating, cooling and other conditions to reach the required temperature, to play the role of heat or cold. Insulation valve is used at room temperature will be solidified high viscosity, steam or other insulation, cold media, make sure the media within the valve to work properly. When the heat is turned off valve, the valve opening height, the nominal diameter of 25% to 30%, stainless steel valves, flow has reached the maximum, the valve indicates the valve has reached the fully open position. So shut-off valve fully open position, the valve types, valve stroke should be determined. Types of liquefied gas cutoff valve stem threads are divided by location external thread type, thread type. According to the flow of media points, straight-through, DC type and angle type. Cut-off valve according to the sealing form points, shut-off valve packing and bellows sealed stop valves. Insulation valve principle: insulation valve has a good cold insulation properties, and the valve diameter and the diameter of the same, while effectively reducing the pipeline medium heat loss. Good cold insulation characteristics, while effectively reducing the pipeline medium heat loss. Insulation valves get in petroleum, chemical, metallurgical, pharmaceutical and other types of systems in many applications, reduce the loss of heat medium in the pipe, to prevent the emergence of media resemble crystals solidification. The role of insulation valves are at high or low temperature conditions through the valve, the valve insulation material within the insulating effect of the mediators, the media will not condense or stick to the inside of the valve body, so that the proper functioning of the valve opening and closing. Cast steel valves, valve insulation Everbright BJ41W (certified), Valve Co., Ltd. by Shandong Everbright valve. Cast steel valves, valve insulation Everbright BJ41W (certification), the valve Valve Co., Ltd. Shandong China Everbright (www.sdgdfm.com) this year introduced a new upgrade, the above picture is for reference only, please call the contact picture on this page or telephone obtain the latest information, Contact: Manager Ma.