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10 Descaling ValVes Pump Minimum Flow Control Valves (Without Power Operator/Automatic Recirculation Valve) developed for high pressure centrifugal pump protection. Popular applications include boiler feed water, petroleum, and steel mill hot strip descale water. Feature • Positive fail open bypass. • integral pulsation damper. • Forged steel body. • Design does not utilize a pilot valve or tube. • start-up bypass inserts available due to start-up debris. • maxi-Flow protection available. Minimum Flow Control With Power Operator restriction Office control Valve Or gate Valve Minimum Flow Control With Auto Recirc. Valve automatic recirculation Valve control Valve Or gate Valve Pump Back Press. Valve By-Pass line Pump reservoir reservoir it provides economical and reliable protection for low and reverse flow. By combining the functions of main line check valve, flow sensing, bypass flow control, bypass pressure reduction, pulsation dampener, and bypass line check valve, the valve eliminates at least seven components necessary with a conventional system. The valve operates without air or electric power and is easily installed with three connections. the valve is installed on the pump discharge, just as an ordinary check valve would be. Upon pump start-up, and without process demand, the bypass is completely open, recirculating the necessary minimum flow. Once process demand starts, the spring loaded disc is lifted and held in position by flow demand. Until main flow demand exceeds recommended minimum flow, the valve will modulated. as the main flow demand increases beyond recommended minimum flow, the bypass will close and all flow will go to the process. BeneFit • Positive pump protection. • smooth operation. • superior pressure containing integrity. • less sensitive to debris and operation. • cycle is not as harsh which can lead to system instability. • avoids possible damage to bypass trim. • Unique feature to prevent pump run-out. • long term proven design...Your operation is not a test lab. P the minimum flow control valve(automatic recirculation valve) of descaling pump is designed, manufactured and qualified by based on custom designed Product. r B
Check Valves For Descaling System (Custom Designed High Pressure Check Valve) The range of our High pressure service check valves are specially custom designed to make harmony with severe duty applications in descaling system. The valves may be used as stand alone duty or incorporated within stop valve or other devices. We recommend the check valves with an axial plug(or nozzle) valve type. check valves are typically formed in axial BeneFits • minimizes the damping effects of hydraulic transient in fluid flow system. • connect directly the flowing control devices such as orifices and back pressure regulation devices. • minimizes chattering problems associated with conventional swing check valves in flow induced vibration. • Provides quick dynamic response reducing reverse flow. descaling systeM—ValVe Ordering/design inFOrMatiOn descaling ValVe • Flow rate, inlet Pressure, Outlet Pressure, Temperature, connections, Operating Power requirements, Fail safety Position, Pump set Technical data PuMP MiniMuM FlOW cOntrOl ValVes • main Flow, min. Pump Flow, Pump Discharge Pressure(normal, By-Pass, shut-Off), By-Pass Back Pressure, Temperature, strainer/Filter information, Pump Data, Power control(Power Design information) or automatic recirculation Valve Orifices, Back Pressure regulatiOn deVices and cHeck ValVes • same as Pump minimum Flow control Valves and allowable Pressure Drop prevention of back flow. The valves are specifically designed for fast-acting-reversing system where back flow is a constant concern such as descaling system. in case of critical severe duty application such as descaling, Our check valves offer the following benefits: Features • Unique Design. • Few moving Parts. • axial movement disc. • Proven streamlined flow path with venture effect. • short stroke of spring assisted nozzle plug. • sizes from Dn50(2”) to Dn500(20”). • Pressure classes from ansi 150# to 4500#. • Wide range of construction material. • easy maintenance & reliable long life. Descaling ValVes 11
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