Metering pump selection as follows: First, determine the pressure: the selected metering pump rated pressure slightly higher than the actual maximum pressure desired, generally 10 to 20% higher. Do not choose too high, the pressure is too high will waste energy metering pumps offer increased investment and operating costs of the device. Second, determine the flow: the selected metering pump flow rate should be equal to or slightly greater than the required flow processes. Use of metering pump flow rate of 30 to 100% metering pump rated flow range is preferably resin project metering pumps, metering pumps, this time repeat reproduction accuracy. Taking into account the economic and practical, the recommendations of the actual needs of the flow metering pump to select 70 to 90% of the metering pump rated flow. In determining the head (hydraulic end) Material: metering pump after determining the specific model specifications, according to streaming media over property selection flow part of the material, this step is very important, if the inappropriate choice of metering pumps, will result in the media Corrosion damage or medium flow components from leaking systems. Serious cases may cause a major accident, if you are not sure, please consult our company. Changzhou City, Xiao source Machinery Co., Ltd. is a safety valve opening and closing pieces by the external force is normally closed state, when the device or media pressure inside the pipe rises above a predetermined value, through to the outside of the system to prevent the emission medium piping or equipment in the medium pressure exceeds a predetermined value of special valves. Safety valves are automatic valves, mainly used in boilers, pressure vessels and piping, control pressure does not exceed a predetermined value plus ammonia denitration metering pumps, personal safety and equipment operation plays an important protective role. Note the safety valve must be pressure tested before use. Valve play a security role in the system. When the pressure exceeds a predetermined value, the valve is opened, the system portion of the gas / fluid into the atmosphere / pipe outside, so that the system pressure does not exceed the allowable value, in order to ensure the system is not due to excessive pressure and accidents. Denitration urea metering pumps, metering pumps, Changzhou Xiao source Machinery offered by Changzhou City, Xiao source Machinery Co., Ltd .. Changzhou City, Xiao source Machinery Co., Ltd. (www.czxiaoyuan.com) (www.czxiaoyuan.com) strong, credible, in Changzhou, Jiangsu reciprocating pumps, metering pumps and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Xiao source Machinery and you hand into the brilliant, for a better future!