Meaning representatives say back pressure valve valve function due a certain pressure, the pressure can generally be adjusted. It can be used to control the flow of air, water, steam, corrosive media, mud, oil, liquid metals and radioactive fluids and other types of media. Opening and closing member is a disc-shaped valve plate, the valve body rotating around its own axis, so as to achieve the purpose of opening and closing or adjusting. Cut off from the main pipe and the throttle effect. The most commonly used system, fluid metering dosing system, hydraulic control systems, chemical reaction conditions, the critical state of state control. Basically divided into two parts, adjust and overcurrent. Back pressure valve by the elastic force of the built-in spring action is achieved: When the system pressure than the set pressure hour, clogging the pipeline under the action of the diaphragm spring force; when the system pressure is large than the set pressure, the diaphragm spring compression, pipeline turned on, the liquid through the back pressure valve. Back pressure valve with a check valve structure similar diaphragm metering pumps, but more than one-way valve opening pressure in between 0.2 to 1.6 MPa. Under pressure piping or equipment container limbo metering pump manufacturers, back-pressure valve to maintain the required pipeline pressure, the pump output flow normally. Also at the end of the pump due to gravity or other effects often occur siphon phenomenon, this back-pressure valve can be cut due to fluctuations in flow rate and pressure of the siphon generated. As for the volume of the metering pump or the like at a low pump pressure metering pump system, there will be an excess of transport. To prevent similar problems, we have the outlet metering pump at least 0.7Bar backpressure, usually by installing a back pressure valve in the metering pump outlet to achieve their goals. Changzhou City, Xiao source Machinery Co., metering pumps type: plunger type 1, the price is low 2, flow rates up to 76 m 3 / h, the flow in the range of 10 to 100 percent, measurement accuracy of ± one hundred One minute, pressure up to 350 MPa. When the outlet pressure changes, the flow rate is almost constant. 3, capable of delivering high-viscosity media, suitable for conveying corrosive slurry and hazardous chemicals. 4, seal packing seal metering pump What makes a good, there is a leak, the need to periodically adjust the packing. Packing and plunger wear, the need for packing rings for pressure washing and emissions. 5, no safety relief devices. Mechanical diaphragm 1, lower prices. 2, no dynamic seals, no leaks. 3, capable of delivering high-viscosity media, abrasive slurries and hazardous chemicals. 4, the diaphragm subjected to high stress, lower diaphragm life. 5, the outlet pressure of 2 MPa or less, suitable for a small range of flow; measurement accuracy of ± five percent, when the pressure from the smallest to the largest, the flow changes up to ten percent. 6, no safety relief devices. Hydraulic diaphragm 1, no dynamic seal, no leakage, safety relief devices and simple maintenance. 2, the pressure up to 35 MPa; 10︰1 flow in the range, measurement accuracy of ± one percent; pressure increased by 6.9 MPa and flow decreased five percent to ten percent. 3, higher prices. 4, suitable for medium viscosity media. Metering pumps, Xiao source Changzhou machinery, high-pressure metering pump is provided by Changzhou City, Xiao source Machinery Co., Ltd. Metering pumps, Xiao source Changzhou machinery, high-pressure metering pump is Changzhou Xiao source Machinery Co., Ltd. (www.czxiaoyuan.com) (www.czxiaoyuan.com) this year introduced a new upgrade, the above picture is for reference only, please dial this page Phone or pictures on obtain the latest information, contact: Xueju Ping.