Automatic recircualtion valve-pump protection valve

Automatic recircualtion valve-pump protection valve


Negotiable Min Order Quantity Unit

Required Quantity
Place of Origin
China
Brand name
DATIAN
Payment Terms
L/C,Others,T/T
Production method
Negotiable
Shipping / Lead Time
Negotiable / Negotiable
Keyword
industrial valve, valves, pump valves
Category
Valves

Shanghai Datian Valve Pipe Engineering Co.,Ltd.

Membership
BIZ
Country / Year Established
China China / 1998
Business type
Manufacturer
Verified Certificate

9

Product name Automatic recircualtion valve-pump protection valve Certification -
Category Valves Ingredients -
Keyword industrial valve , valves , pump valves Unit Size -
Brand name DATIAN Unit Weigh -
origin China Stock -
Supply type - HS code 8481

Product Information

 

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

Chemical industry

Petrochemical industry

Steel factory

Fire protection system

Traditional power plant

Shipment/shipping

Paper-making industry

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

result.

Three protection ways for pump

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.

Con trol circulating syste m

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 minimum flow of pump, loop closed, no extra energy loss. But 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 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

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’’.

ZDL Model

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

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’’.

 

B2B Trade

Price (FOB) Negotiable transportation -
MOQ Negotiable Leadtime Negotiable
Payment Options L/C,Others,T/T Shipping time Negotiable

Shanghai Datian Valve Pipe Engineering Co.,Ltd.

Country / Year Established
China China / 1998
Membership
BIZ
Business type
Manufacturer

9

President
Yu chengshan
Address
No.3223,Zhouzhu Road,Pudong district,Shanghai,201323
Product Category
Other General Industrial Equipment,Valves
Year Established
1998
No. of Total Employees
101-500
Company introduction

 

Shanghai Datian Valve Pipe Engineering Co., Ltd, was set up in 1998. For more than 20 years, DATIAN has been the recognized pioneer and leading provider of high quality Valves. Incorporating advanced flow control technologies, DATIAN's best of breed solutions have proven themselves in every level of the irrigation, water works and fire protection industries. Today, DATIAN's tailor-made solutions help global customers meet the challenges of the 21st century, delivering superior performance over a long service life at the most competitive price.

 

DATIAN Valve is one of the most professional manufacturers of ball valves in China. And we also offer control valve,automatic recirculation valve,gate valves, globe valves, check valves, bellows valves, butterfly Valves... Our valves are supplied for a broad range of applications in various industries such as power generation, chemical, petrochemical, oil, gas, pulp, paper, mining, cryogenic and ship building...

DATIAN Valves strives to maintain the following ethics:

Technically  qualified  personnel  delivering  the relevant  technical expertise and solutions.

Sufficient  stock  levels in  order  to provide  immediate  standard  order  completion.

Competitive pricing  on all equipment .

All round professionalism and integrity from all staff members

DATIAN Valves has passed CE, API, ISO,API certificates. All products supplied by the company are manufactured to the required standards. So for more information on the types of valves we supply, please do not hesitate to contact us by calling, or E-mail us. We look forward to hearing from you.

 

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