43 visiting now: 18 USA USA flag 16 China China flag 2 Netherlands Netherlands flag 2 Sweden Sweden flag 2 Germany Germany flag 1 Russia Russia flag 1 France France flag 1 India India flag

Automaic Recycle Valve Shanghai Datian - China

price: contact company for price

Automaic Recycle Valve- Shanghai Datian Valve

1. Brand: Datian

2. Model No. : ZDT series, ZDL series, ZDM series, BY7 series, ZHD series

3. Manufacturer: Shanghai Datian Valve Pipe Engineering Co. , Ltd.

4. Business Terms: FOB Shanghai- slectable terms as FOB, C& F, CIF, EXW

5. Payment: TT, L/ C, Cash, Crdit Card

More information, pls feel free to contact with Anne He for a soonest reply!

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

â– Chemical industry

â– Petrochemical industry

â– Steel factory

â– Fire protection system

â– Traditional power plant

â– Shipment/ shipping

â– Paper- making industry

â– Environmental protection

Centrifugal pumps require protection

If you use centrifugal pumps for any liquid- boiler feed water, condensate, or process fluids, a significant investment has been made in the pump, driver and related controls. Minimum flow protection is vital upon pump start up and low demand conditions. If reliable protection does not exist, the following unfavorable effects can interfere with the performance and reliable operation of the pump.

The liquid’s temperature will rise due to friction and hydraulic losses within the pump. Figure 2a illustrates the temperature rise in relationship to the H- Q curve. The curve indicates that at or near the best efficiency point, the temperature rise is minimal and not significant to the pump operation.

The process flow removes the generated heat from the pump. The temperature increases as the flow through the pump is reduced. Frictional and hydraulic losses generate heat, while the quantity of fluid to which this heat is transmitted is reduced. The rise in temperature results in the formation of vapor. The elevated temperature / vapor pressure of the liquid results in problems ranging from damaged seals and bearings to complete failure of the rotating elements. Internal recirculation within the pump, often termed incipient recirculation, can cause a form of cavitation leading to impeller damage. Internal recirculation is illustrated in Figures 2b and 2c.

High specific speed pumps have power curves which rise as the flow reduces. If adequate flow is not maintained, motor overload will


Three protection ways for pump

â– Con tinuous cir cu lat ing syste m

Minimum requirement of continuous circulating system pump is unrelated with the discharge of Process flow changes system. After setting of minimum flow, through orifice plate directly backflow to storage tank. Although continuous minimum flow circulation can protect pump very good, but pump must provide greater power output to ensure system

process flow plus recycle flow, which causing additional energy waste.

â– Con trol circulating syste m

Control circulatory system is assembly by the check valve, flow gauge, minimum flow control valve can provide minimum flow protection, when process flow is greater than minimum flow of pump, loop closed, no extra energy loss. But system is complex, control components, purchase, installation, maintenance cost is higher.

â– 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 minimum, with lower Installation and maintenance cost, It is the priority pump protection way of modern industrial process.

ZD series Automatic recirculation control valve

ZDT Model

â– Simple structure, low cost, long life, suitable for Low pressure

Working conditions.

â– Cast valve body, material: carbon steel or stainless steel etc.

â– Big flow of bypass, maximum flow is 60% of main flow, KV value

can be adjusted.

â– Bypass maximum operating pressure differential up to 4 MPa.

■Pressure CL150# - 400# , size1’’ - 16’’.

ZDL Model

â– Multi- orifice cage bypass, low noise, suitable for middle and

low pressure conditions.

â– Forged steel body, material: carbon steel or Stainless steel etc.

â– Non- return valve function is standard, Maximum pressure

differential up to 6 MPa.

â– With venturi port main flow check valve structure, be applicable

for complicated working conditions.

■Pressure CL150# - 600# , size1’’ - 20’’.

â– Manual bypass operation is optional.

ZDM Model

â– Multistage decompression to preventing cavitation, reducing

velocity, suitable for high pressure conditions.

differential up to 30 MPa.

■Pressure CL150# - 2500# , size1’’ - 20’’.

Company Contact:

  • Phone: 8602168106365

  • Address: No.3223,Zhouzhu Road,Pudong district, Shanghai, China

  • Email: Email

Published date: October 30, 2015 -

  • Business Description: Shanghai Datian valve,is located at Shanghai,China,owns over 30 years

    experience in valves manufacture and now become Fisher/Descon

    supplier years.

    Further of us pls ref.below:

    1. Best offer due to we are valve manufacturer.

    2. We own import & export rights.

    3. API,CE,ISO,TS certificates are available.

    4. Ball valve,control valve,butterfly valve,check valve,PRV,gate valve, globe valve,etc.

    5. We own valve utility patent due to strong technician team.

    6. We are fisher and descon supplier and products exported to more than 50 countries.

    7. More of us,you could visit the website.

    As one of China s leading m anufacture in valve industry, DATIAN with continuously product development and management creating, continuous product and service quality improvement, targeting on meeting customers complete satisfaction. Meanwhile, DATIAN has an active and harmonious working environment, has full employee training system, stimulate employee s self improvement, assume responsibility and achieve self value features.

Related listings

  • Cardan Shaft
    Cardan Shaft
    Equipment / Machinery - YANGZHOU LASTE MECHANICAL ENGINEERING CO., LTD. - China - May 21, 2016 - contact company for price

    shaft coupling performs by connecting two shafts or the shaft with the rotary part, so as to keep them linked together during the transmitting movement and dynamic process. And it can also function as a compensation of the relative displacement betwe...

  • Kneader Reactor
    Kneader Reactor
    Equipment / Machinery - Foshan JCT Machinery Co., Ltd - China - May 18, 2016 - contact company for price

    The introduction of kneader reactor Kneader reactor is the main chemical reaction of the typical production equipment, which is widely used in resins, adhesives, paint, cosmetics, pharmaceutical and other chemical production. To break down or combine...

  • Toyooki Gear Pump
    Toyooki Gear Pump
    Equipment / Machinery - A&S Hydraulic Co., Ltd - China - May 17, 2016 - contact company for price

    A& S Hydraulic Co. , Ltd supplies all models of Toyooki Internal Gear Pumps: Toyooki Internal Gear Pump TCP Series Toyooki Internal Gear Pump TCM2, TCM3, TCM4, TCM5 Toyooki Internal Gear Pump TCP2T, TCP3T, TCP4T, TCP5T Toyooki Internal Gear Pump TCP2...

Safe Trade Tips

  • Ask for business references and check them
  • Use a payment method that offers better protection for all such as Letters of credit and verified professional escrow services. Avoid payments in advance such as money transfers
  • Verify their business via their local Chamber of Commerce
  • Search the internet using their website address, their business name, their phone and fax numbers, and their email addresses to see if you can find any feedback about them.
  • Get to know more about scams to avoid: Internet Crime Complaint Center - International Financial Scams
  • This site is never involved in any transaction, and does not handle payments, shipping, guarantee transactions, provide escrow services, or offer "buyer protection" or "seller certification"