GALLERY
PRODUCT DESCRIPTION
ZDT Series Automatic Recirculation Valve
ZDT Series Automatic Recirculation Valve industrial equipment process request centrifugal pump basically works under the 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 dating 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 the necessary minimum flow of the pump.
Applications Of Automatic Recirculation Valve
Chemical industry
Petrochemical industry
Steel factory
Fire protection system
Traditional power plant
Paper-making industry
Shipment/shipping
environmental protection industry
Centrifugal Pump Protection Scenarios Using Automatic Recirculation Valve (ARV)
Three protection ways for pump
Continuous Circulating System
Minimum requirement of continuous circulating system pump is unrelated to the discharge of Process flow changes system. After setting of minimum flow, through orifice plate directly backflow to a storage tank. Although continuous minimum flow circulation can protect the pump very good, the pump must provide greater power output to ensure system process flow plus recycle flow, which causing additional energy waste.
Control Circulating System
Control circulatory system is assembly by the check valve, flow gauge, minimum flow control valve, control circulation system, control circulation system can provide minimum flow protection, when process flow is greater than the minimum flow of the pump, loop closed, no extra energy loss. But the system is complex, control components, purchase, installation, maintenance cost is higher.
Automatic Recirculation Control Valve
Automatic recirculation valve set check valve, flow perception, bypass control valve, multi-stage step-down in one, do not need power, control system and wiring, essential safety. Taking up small space, reducing the possibility of high-speed fluid to malfunction to a minimum, with lower installation and maintenance cost, It is the priority pump protection way of the modern industrial process.
The Main Advantages Of ZD Series Automatic Recirculation Control Valve
ZD series Automatic Recirculation Valve(ARC valve) is suitable for bypass with high-pressure differential, a maximum pressure differential is 30MPa, and the specific choice is determined by the factory. Multistage decompression type M type bypass can eliminate noise made by high-speed flow medium, prevent damage of cavitation erosion, and braising to valve components.
ZDT Model ARC valve
Simple structure, low cost, long life, suitable for Low-pressure Working conditions.
Cast valve body, material: carbon steel or stainless steel, etc.
The big flow of bypass, maximum flow is 60% of the main flow, KV value can be adjusted.
Bypass maximum operating pressure differential up to 4 MPa.
Pressure CL150# - 400#, size1’’ - 16’’.
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