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 Valves
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|
|Flange Drilling||EN 1092-2 PN16|
|Inspection and Test||ISO 5208|
﹡For all available general design, face to face standard and flange drilling,please kindly contact CNBM directly.
Materials of Parts
|6||Hanger Pin||Stainless Steel|
|8||Cover Gasket||Graphite with Soft steel|
﹡For other material request,please kindly contact CNBM directly.
Dimensions of Check Valves
- Q:What are the features of axial check valves?
- Axial flow check valve (GB/T 21387-2008) by the standardization of the national valve technical committee (SAC/TC 188). The drafting unit: Shanghai Huatong Valve Co., Ltd., Ningbo aimeike copper valve valve Co. Ltd. Shanghai zhengfeng. Main drafters: Zhang Yonghui, Liu Tienan, Zheng Xuezhen, Chen Tiewang, Meng Aimin. By the national standardization valve technical committee is responsible for the interpretation.TitleAxial flow check valveAuthorState Administration of quality supervision, inspection and Quarantine of the People's Republic of China, China National Standardization AdministrationPublication dateMay 1, 2008LanguagesSimplified ChineseISBNOne hundred and fifty-five billion sixty-six million one hundred and thirty-one thousand two hundred and fiftyForeign nameAxial Flow Check ValvePressChina Standard PressThe number of pagesPage 6FolioSixteenBrandBeijing Jinsong Jian Da Science and technology books Co., Ltd.Axial check valve (GB/T 21387-2008) was published by China standard press.
- Q:Where can I find the good check valve?
- Crown valve pressIt depends on what type of check valve you need
- Q:Check valve symbols?
- The valve that prevents the backflow of the medium is called a check valve. Check valves belong to the automatic valve, mainly used for one-way flow of media channels, allowing only medium to flow in one direction, to prevent accidents.
- 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:What is the air pipe check valve?
- One-way valve, one-way flow, to prevent negative pressure reflux.
- Q:What's the difference between a stop valve and a check valve? Is it a valve?
- The cut-off valve has the following advantages: 1. in the process of opening and closing, the friction of the sealing surface is smaller than that of the gate valve, and it is wearable. 2. high opening height. 3. usually only a sealing surface, the manufacturing process is good, easy to repair. The valve is widely used, but because the opening and closing torque is large, the structure length is longer, usually the nominal diameter of DN are limited to the following 200mm. The flow resistance of the stop valve is greater. Thus limiting the wider use of cut-off valves.
- Q:What's the difference between the cut-off, check, check, and stop valves three? Better picture,
- Stop check valve: when the handwheel is rotated so that the valve stem rises, the disc does not rise together, but only the valve clack is released.
- Q:Tap water tank with vertical and horizontal check valve.
- Ball valves usually have very narrow seats, and may remove solids and make seating more efficient.The problem of vibration may be limited to small valves. When the valve is large, the inertia of the moving parts increases. The increased inertia may effectively damp the vibration and cause delayed closing, after the backflow has started. The damping of the seat becomes very important.All valves must check the flow path area and calculate the flow velocity for the design operating conditions. The area of the disc and piston is as important as the area of the main orifice. The smaller runner areas are corrosion prone and may cause cavitation wear.For specific functions, the valve body of the check may include auxiliary connections such as vents and drains. Hot applied valves may sometimes have a bypass valve to allow the system to warm up at low flow.
- Q:How many kinds of check valves should be used?
- Ball check valve because the sealing part is covered with rubber ball, therefore, good sealing performance, reliable operation, anti water hammer performance; the seals can be a single ball, they can make more balls, so you can make large caliber. But its seal is wrapped in rubber hollow sphere, does not apply to high pressure pipeline, only applies to the middle and low pressure pipeline.Because the shell material of spherical check valve can be made of stainless steel, sealed hollow sphere parts can be coated PTFE plastics, can also be applied in the pipeline so general corrosive medium.The check valve in the working temperature between -101~150 DEG C, the nominal pressure is less than 4.0Mpa, nominal in the range of 200~1200mm
- Q:PPR check valve, butterfly valve, as well as water gauge which quota?
- The valves and water meters installed in the same pipe are the same.
We are one of the largest enterprises in China, integrating research, development, production, marketing and commercial services of stationery.And it became the largest manufacture of the writing instruments in Asia, with the scale of production ranked the first in the consecutive 12 years in China, and the sales ranked the third in the global industy, and the strength ranked within the eighth.
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
||OEM Service Offered；Design Service Offered
|Product Price Range