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Home About us Service Certificate Inquiry Contact us Automatic Recirculation Valves for Centrifugal Pump Minimum Flow Protection Call Us : +86-21-68106360 ZDT series ARC valve ZDM series ARC valve ZDL seriesARC valve Back pressure valve Minimum flow control valve The working theory of pneumatic valve The role of pneumatic positioner Datian smart control valve marches into the environmentally-friendly chemical industry Datian is granted many technological patents Datian has successfully developed the high pressure power station control valve Datian control valve Applications of our product We do prefer friendly competition Pump Run Out Protection Start Up Internals Frequently asked question Valve Repair & Service Working principle Typical layout and flowchart of the ARC valve Instruction for installation and maintenance Solution for pump protection Modern industrial equipment process request centrifugal pump are basically work under condition of variable flow. An automatic recirculation valve (ARC valve) is a multifunctional valve whose primary purpose is to ensure that a pre-determined minimum flow is assured through a centrifugal pump at all times. This is important as centrifugal pumps suffer from overheating and cavitation and can be permanently damaged if they run dry. Through many years of research and development, continuous innovation and practice, shanghai datian valve Co. research ZD series Automatic recirculation control Valve, to prevent overheating, serious noise, unstable and erosion damage of centrifugal pump under low load operation. As long as the flow rate of the pump valve below a certain value, the bypass backflow mouth will automatically open to ensure necessary minimum flow of pump. Automatic Recirculation Valve Data Sheet ZDM Model ZDM Model Automatic recirculation control valve Multistage decompression to preventing cavitation, reducing velocity, suitable for high pressure conditions; Forged steel body, material: carbon steel or Stainless steel etc; Non-return valve function is standard, Maximum pressure differential up to 30 MPa; Pressure CL150# - 2500#, size1’’ - 20’’;Manual bypass operation is optional. ZDL Model ZDL Model Automatic recirculation control valve Multi-orifice cage bypass, low noise, suitable for middle and low pressure conditions; Forged steel body, material: carbon steel or Stainless steel etc; Non-return valve function is standard, Maximum pressure differential up to 6 MPa; With venturi port main flow check valve structure, be applicable for complicated working conditions... ZDT Model ZDT Model Automatic recirculation control valve Simple structure, low cost, long life, suitable for Low pressure working conditions; Cast valve body, material: carbon steel or stainless steel etc; Big flow of bypass, maximum flow is 60% of main flow, KV value can be adjusted; Bypass maximum operating pressure differential up to 4 MPa; Pressure CL150# - 400#, size1’’ - 16’’. About Us datian arc valve Shangh
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