20 long years of manufacturing excellence with quality at it's best!
WE ARE SPECIALIZED
Who we are
Shanghai DaTian Valve Pipe Engineering Co.,Ltd. is a high-tech enterprise specialized in producing various industrial valves. DATIAN strive on providing a full package of industrial valve solution to the client, focus on industrial valve manufacture, development, sales, and services. With nearly twenty years of hard work, DATIAN created an individual, characterized valve market. Products are widely applied in oil gas, chemical, electric power, shipping, mining, water treatment, industrial system, etc.
What we advantage
DATIAN Valve aims to reduce the cost and create more values for clients through offering competitive products and excellent service. Also, the automatic recirculation control valve is our key product on purpose of pump minimum flow protection. Product design and manufacture standards include: GB, ANSI, API, JIS, DIN and BS etc. Nominal diameters: DN 6mm to 3000mm. Pressure range: 0.6Mpa to 42.0Mpa. Materials: carbon steel, stainless steel, alloy steel and special materials.
What is automatic recirculation valve?
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.
Application on
- 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 ARC 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 control valve
ZD series 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’’.
ZDL Model ARC 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.
- Pressure CL150# - 600#, size1’’ - 20’’.
- Manual bypass operation is optional.
ZDM Model ARC 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.
This Is What We Do
products
Automatic Recirculation Valve
The automatic recirculation valve is a kind of pump protection device. It automatically protects the centrifugal pump when a pump body occurs cavitation damage or unstable (especially conveying hot water at low load operation).
Back Pressure Valve
YB7 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.
Minimum Flow Control Valve
Minimum Flow Control Valve used a multilevel cage symmetric sleeve control valve. It complete control medium velocity within the valve, and greatly reduced noise made by high-pressure gas or steam within the valve, stabile multistage pressure reducing...
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