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Plastic back pressure valve for dosing metering pump Safety valve

Size: DN15-DN50
Lead time: 30 days around
MOQ: 10Ctns
Delivery: Ocean or Express
Port: Ningbo or Shanghai
Place of origin: China

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The back pressure valve prevents volumetric pumps such as metering pumps from working under low pressure systems, and maintains a constant pressure at the pump outlet, resulting in excess delivery.

Back pressure valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media.


It mainly plays the role of cutting and throttling on the pipeline. The most commonly used systems are fluid metering and dosing systems, hydraulic control systems, chemical reaction conditions, and physical critical state control. Basically, it can be divided into two parts: regulation and overcurrent.

The back pressure valve is realized by the elastic force of the built-in spring: when the system pressure is smaller than the set pressure, the diaphragm blocks the pipeline under the action of the spring force; when the system pressure is greater than the set pressure, the diaphragm compresses the spring and the pipeline On, the liquid passes through the back pressure valve.


Function:

1. The one-way valve on the outlet pipe is used to prevent the backflow of the liquid, and the back pressure valve is used to maintain a constant pressure at the pump outlet.

2. Use with pulsation damper to reduce the damage of water hammer to the system, reduce the peak value of flow rate fluctuation, and protect pipelines, elbows and joints from the impact of pressure fluctuations.

3. The back pressure valve and the pulsation damper are used together to reduce the harm of water hammer to the system, reduce the peak value of flow rate fluctuations, and protect the pipelines, elbows and joints from the impact of pressure fluctuations.

4. Ensure the stability of the water flow of the pump.

5. Reduce the fluctuation of flow and pressure due to siphon.


Installation Precautions:


1. The installation should avoid resonance with the system, otherwise it will have a serious impact on the work of the back pressure valve, and may damage the back pressure valve and cause danger.

2. When used together with the pulsation damper, the pulsation damper should be installed between the pump and the back pressure valve to absorb the peak flow between the pump and the back pressure valve. Slow down the wear rate of the back pressure valve.

3. Protective shed or protective cover should be added for outdoor use.

4. Before performing any maintenance on the back pressure valve, stop the operation of the equipment, release the pressure, close the valve connected to the back pressure valve and the system, and confirm that there is no pressure in the pulsation damper. During maintenance, pay attention to prevent the liquid being transported from harming the human body.

5. The back pressure valve is directional. If the inlet and outlet of the back pressure valve are reversed, the back pressure will increase exponentially, causing harm to the system and possible danger.

6. If the back pressure valve is found to be faulty during operation, stop the system in time or close the pipeline where the back pressure valve is located, stop the use of the back pressure valve, and check and replace the back pressure valve.

7. Before any inspection and maintenance of the back pressure valve, stop the operation of the equipment, release the pressure in the valve, close the valve connected to the back pressure valve and the system, and at the same time confirm that there is no pressure in the pulsation damper. During maintenance, pay attention to prevent the high-pressure fluid in the valve from splashing and hurting the human body.


Material: UPVC, PP, CPVC, PVDF, SUS304, SUS316L;

Working pressure: 0-1.0MPa, 0.2-1.6MPa

Diameter size: DN15, DN20, DN25, DN32, DN40, DN50, DN65;

Connection method: bonding, hot welding, thread, flange;

Diaphragm material: PTFE+check glue compound


Safety valve back pressure valve Parts diagram.jpg

Safety valve back pressure valve Dimensions.jpg

DN(mm)LHDdzh
DN1517518182202227
DN2017418182251929
DN25202198107322133
DN32251198107403135
DN40285260155503160
DN50355260155633960
DN65376260155754165


Quality-Warranty.png


1. Our valves are fully inspected to ensure that they do not leak and feel right in the hand.                         

2. We send the same quantity of products free or send payment back once customers find a problem when getting goods.

3. We will reply to you within a workday and come up with solutions within 5 workdays when we receive your claim.

4. We will reply to you within a workday when receiving your inquiry.


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1. What is your MOQ?   

Our MOQ is usually 10 CTNS.   

2. What is your delivery time?   

The time of delivery is around 30-45days.

3. What is the shipping port?   

ShanghaiNingbo、 XiamenShenzhenGuangzhou

4. What are your payment terms?  

We accept 30% T/T in advance,70% against the copy of  B/L, or 100% L/C.

5. How should I contact you?  

You can contact us with Trade Manager or send us an email by clicking Contact Supplier bottom.

6. What is the location of your company?

Our company is located in Ningbo, Zhejiang Province, China. If you would like to visit, you are much welcome.

7. How about the samples?  

We could send you the samples, most samples are free to send to most places in China. If sent to other countries, transport fee should be paid by you.


Our Services.png


1. Any inquiries will be replied to within 24 hours  

2.No leakage, pressure PN 10;  

3. Well and high-quality control ;  

4. Environment-friendly, non-toxic, good-looking, and long service life;

5. Lightweight, easy to handle and transport;

6. Soft colors and excellent design, suitable for installation either exposed or hidden;  

7. Wonderful ability in chemical corrosion resistance;  




1. Genuine products with excellent quality and competitive prices.

2. Cooperating with customers all over the world and knowing the markets very well.

3. We are a reputable company, the company has passed BV and SGS third-party certification.

4. After- Services will be highly-satisfied. Any problems and feedback will be answered in a short time.




Company: NINGBO SALVADOR IMP. & EXP. CO., LTD

Mob&Whatsapp: 0086 15869351645

Tel: 0086-574-88324025

Email: cindyli@swdplastic.com


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