Copper valve selection precautions
Selection of copper valves: 1. Based on the selection of control functions, all kinds of valves have their own functions, the selection should pay attention to its corresponding function. 2. According to the conditions of selection, the commonly used valve technical parameters include pressure, the maximum allowable working pressure, the working temperature (minimum and maximum temperature) and the medium (corrosive, flammable), the selection should pay attention to the above parameters and conditions The technical parameters of the valve match. 3. According to the device structure selection. Pipe system of the device structure pipe thread, flange, ferrule, welding, hoses and so on. Therefore, the construction of the valve device is necessary with the pipe structure consistent with the device, and the standard to be consistent.
Stearic acid is widely used in the manufacture of PVC plastic pipes, plates, profiles, and films. It is a PVC heat Stabilizer with good lubricity and good light and heat stability. In plastic PVC pipes, stearic acid helps prevent "coking" during processing. It is an effective thermal stabilizer added in the processing of PVC films, and can prevent finished films caused by excessive exposure to sulfides.
Mainly used to produce stearates: sodium stearate, magnesium stearate, calcium stearate, lead stearate, aluminum stearate, cadmium stearate, iron stearate, potassium stearate. Stearic Acid,Industrial Stearic Acid,Chemical Stearic Acid,Agent Stearic Acid Henan Shunbang Chemical Industry CO.,Ltd , https://www.sbcpe.com
Widely used to make cosmetics, plastic cold-resistant plasticizers, mold release agents, stabilizers, surfactants, rubber vulcanization accelerators, waterproofing agents, polishing agents, metal soaps, metal mineral flotation agents, softeners, pharmaceuticals and others Organic chemicals.
In addition, it can also be used as a solvent for oil-soluble pigments, a crayon slip agent, a wax paper polish, and an emulsifier for glyceryl stearate.
The product is used as a lubricant, defoamer and food additives in the food industry as a raw material for glyceryl stearate, sorbitan stearate, and sucrose esters. Used as the raw material of additives and the raw material of daily chemical products.
Stearic acid is widely used in the manufacture of PVC plastic pipes, plates, profiles and films. It is a PVC heat stabilizer with good lubricity and good light and heat stabilization. In plastic PVC pipes, stearic acid helps prevent "scorching" during processing. It is an effective heat stabilizer added in the processing of PVC film, and it can also prevent the finished film caused by exposure to sulfide. Discoloration.