Check Valves Check Valves
are used in pipes under pressure between Class 150~2500LB, working temperatures﹣196~600℃. They are used in industries including oil, chemistry, pharmaceutical, fertilizer, and power gene-ration to prevent the backward flux of the media.
Design Feature of Check Valve
1. The products feature a reasonable structure, reliable seal, good performance and nice modeling.
2. Either soft or hard seal can be selected for the product upon different working conditions. The sealing face is built up with Co-based carbide alloy, leaving a better wearability, corrosion and scrap resistance and a longer duration.
3. Small opening pressure, the disc can be opened fully with a very small pressure differential.
4. Inside-set bolt-bearing structure reduces leakage and reliable use.
5. Class≥1500LB, the middle cavity uses a self-tightening sealing structure to have the sealing performance reinforced along with the pressure rise so as to ensure the sealing performance.
6. Different parts materials and different sizes for flange, butt-welding are available for sensible combination according to different working facts and customers' requirement
Technical Data of Check Valves
|Face to Face
||DIN 3202 F6|
||EN 1092-2 PN16|
|Inspection and Test
﹡For all available general design, face to face standard and flange drilling,please kindly contact CNBM directly.
Materials of Parts
||Graphite with Soft steel|
﹡For other material request,please kindly contact CNBM direct Dimensions of Check Valves
The producting deparment of check valve
The Application of check valve
The package of Check Valve
- Q:Pump adapter need check valve?
- General in the flange pipe interface or who is interface settings simple check valve, safety valve is white, but does not apply to the north, the northern cold, need to separate in the pipeline is provided with a check valve, a higher temperature of the South without suitable for direct use may be frozen.
- Q:The check valve for the printer doesn't have any air in it, but it doesn't come out. It still doesn't work
- 1. Do you have ink in the ink cartridge? If not, you can't hit it;2, the ink box installation is in place, let the printer self check to see whether the instructions are normal;3, everything is normal, "maintenance" in the print head, not, deep cleaning;Generally normal, no, that might be a cup, change cartridgesIn addition, the check valve must be opened when printing, the cartridge is not placed high, and so on after processing
- Q:What is the difference in price between the check valve HH48X-10C and the HH49X-10C?
- HH47X, HH48X and HH49X are all the same, all of which are micro blocking, slow closing and butterfly type silencing check valves.
- Q:Check valve selection
- 1, do not use ordinary ball check valve, rubber check valve, quick response, but it is not very durable2, vacuum tank3, I think the most benevolent is, get an auxiliary start pump, small kind of, the head is not too high, connect the municipal pipe network, open the main pump before the auxiliary pump irrigation. But the premise is that your main pump is a centrifugal pump
- Q:Check valve authentication information
- If you need surface processing, please contact the manufacturer.ISO 9001-2008Check-All valve company has ISO9001-2008 certification. Our certificate number is: FM 40858, which was issued by the British Standards Institute (BSI). The certificate indicates that the design, manufacture and distribution of all Check-All products comply with the requirements of ISO-9001-2008. This also means that when you order the Check-All valve, you will be assured of a high quality check valve on time.NACE Compliance certification of the American Society of corrosion protection engineersMany Check-All valve products comply with NACE MR0175/ISO 15156 and NACE MR0103. Contact manufacturers can get.
- Q:What's the fire check valve?
- Fire check valve, suitable for installation in the kitchen of the air inlet is connected with the common flue, smoke lampblack machine, lampblack and other indoor air discharge to the roof, can prevent the flue gas in the flue flow, and when the building fire, the fire spread to the common flue, the check valve will automatically shut down, stop to fire you spread the rescue of property and escape more time for you, protect your property and life safety. The fireproof device is sensitive and reliable, and is favorable for environmental protection and improving the fire safety level of the house.
- Q:What is the function of the ventilator's check valve?
- The flue check valve refers to the automatic opening and closing valve plate, which is used to prevent the backflow of soot through the thermal flow of the range hood. It is also called the smoke back valve, the smoke prevention treasure and the flue isolator.
- Q:What are the differences between the vertical check valve and the horizontal check valve in function and principle?.
- First of all, the outward appearance of the vertical check valve flow direction, that is, the direction of check valve installation is vertical to the horizontal direction. The horizontal check valve is horizontal.
- Q:Does the check valve of the flue of the range hood work?
- There is also a smoke exhaust smoke fire check valveThe utility model is installed at the rear end of a kitchen fume exhauster or a toilet exhaust fan to a common exhaust pipe inlet with a fireproof grade, and the fan is opened (exhaust gas) when working. In the fan does not work naturally closed (to prevent backflow, waste) or common duct inside temperature reaches a set value can be automatically closed, and within the stipulated period of time to meet the fire performance requirements, the role of smoke from fire retardant valve. This metal valve works on more, the basic effect should be good.
- Q:Is the check valve in or behind the gate valve? Why?
- The exit of the general pump is the first soft connection (shock absorber), followed by the check valve, and then the partition valve (such as butterfly valve, gate valve, cut-off valve, etc.), this is not the final answer.The question is interesting, and no corresponding information has been found in the relevant standards. We have also discussed the related issues, but differences of opinion is relatively large, the advantages of 1, first installed check valve installed after the valve or butterfly valve, check valve, can be protected, especially in a parallel pump, when the pump does not start, another pump starts when the impact force is gate valve or butterfly valve bear, disadvantages: gate valve or check valve who will protect? There have been a case of butterfly valve is broken. 2, first installed gate valve or butterfly valve installed after the check valve, advantages: can protect the butterfly valve or gate valve, the impact on the check valve to bear. Disadvantages: check valve who will protect, check valve by pressure difference switch, if the high pressure high pressure pipe, pump, if the flow is not stable, so check valve will repeatedly switch, will affect the check valve life. Personal opinion: check valve, check valve performance now have changed, many are using the slow closing check valve, so the impact force is two aspects to bear, because exports are not fully open the valve or butterfly valve, so you can put in check after the gate valve or butterfly valve valve. If not the slow closing check valve installed in the valve or the best after the butterfly.
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1. Manufacturer Overview
|Annual Output Value
||Above US$100 Million
||Africa, Asia, America, Europe, Middle East, West Europe
2. Manufacturer Certificates
|a) Certification Name
3. Manufacturer Capability
||41% - 50%
|No.of Employees in Trade Department
||42000 square meters
|No. of Production Lines
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|Product Price Range