[dropcap2][/dropcap2]Automatic recirculation valve (ARC Valve) is a kind of pump protection device. It automatic protect centrifugal pump when pump body occur cavitation damage or unstable . Once pump flow is lower than the preseted flow
[dropcap2][/dropcap2]Back pressure valve is used to the applicable conditions that the common controlling system can not be used, as a kind of special pressure control valves, it commonly match with automatic recirculation valve to protect pump system.
[dropcap2][/dropcap2]Multistage minimum flow control valve cage control valve used multilevel cage symmetric sleeve control valve. It complete control medium velocitywithin valve, and greatly reduced noise made by high pressure gas or steam within valve