BFEA Best Selling Check Valve

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Product Description:

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

Check ValveSize DN40-DN600
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

Parts Description Material
1 Body GG25
2 Seat Ring Brass
3 Disc Ring Brass/EPDM
4 Disc GG25
5 Hanger GGG50
6 Hanger Pin Stainless Steel
8 Cover Gasket Graphite with Soft steel
9 Cover GG25

﹡For other material request,please kindly contact CNBM direct Dimensions of  Check Valves

Size(DN) L D D1 D2 b n-d H W.T(kg)
40 180 150 110 84 18 4-19 110 9
50 200 165 125 99 20 4-19 130 13.4
65 240 185 145 118 20 4-19 140 17.7
80 260 200 160 132 22 8-19 150 20.8
100 300 220 180 156 24 8-19 160 29.3
125 350 250 210 184 26 8-19 190 47
150 400 285 240 211 26 8-23 210 67
200 500 340 295 266 30 12-23 250 118.7
250 600 405 355 319 32 12-28 310 171.9
300 700 460 410 370 32 12-28 340 232.5
350 800 520 470 429 36 16-28 450 330
400 900 580 525 480 38 16-31 520 460
450 100 640 585 548 40 20-31 550 580
500 1100 715 650 609 42 20-34 590 700
600 1300 840 770 720 48 20-37 680 780

The producting deparment of check valve


 Check Valve

The Application of check valve

 Check Valve

The package of Check Valve 

 Check Valve

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Q:Installation position of air pipe check valve
The air pipe check valve is installed in an air conditioner or a pipeline, and when the fan is in operation, the blade is lifted and the air flow passes smoothly; when the fan stops, the valve blade is closed, and the backflow of gas is prevented. But the wind speed in the air duct must not be less than 8m/s. (it can be made into explosion-proof type or pneumatic type)Check valve refers to rely on the flow of the media itself and automatically open and close the valve flap, used to prevent media backflow valve, also known as check valve, one-way valve, counter flow valve, and back pressure valve. The check valve belongs to an automatic valve, whose main function is to prevent the backflow of medium, prevent the reverse of pump and drive motor, and release the container medium.
Q:Does the tap water return to the water?
Check valve refers to rely on the flow of the media itself and automatically open and close the valve flap, used to prevent media backflow valve, also known as check valve, one-way valve, counter flow valve, and back pressure valve.
Q:Where can I find the good check valve?
Crown valve pressIt depends on what type of check valve you need
Q:What's the difference between a stop valve and a check valve? Is it a valve?
A check valve is a valve that automatically prevents the flow of fluid. The disc of the check valve is opened under the action of fluid pressure, and the fluid flows from the inlet side to the outlet side. When the inlet side pressure is lower than the exit side, the valve automatically closes under the influence of fluid pressure, gravity and other factors to prevent fluid flow backwards. The function of this type of valve is to allow the medium to flow in one direction and to prevent flow in the direction. Usually the valve is automatically work, fluid pressure flow in one direction, the valve open; the opposite direction of fluid flow by gravity, fluid pressure and valve closing effect on the valve seat, thereby cutting off flow. Among them, the check valve belongs to this type of valve, which includes swing check valve and lift check valve. The swing check valve has a hinge mechanism and a gate like valve free against the inclined seat surface.
Q:How to install the kitchen flue check valve?
1, vertical transport, the flue should take protective measures, and must be two lifting.2. Locate the center line of the flue position. In the reserved hole, draw down four vertical central lines from the roof, and draw 2 orthogonal central lines on the floor plane.3, the flue to the scene, the first flue hanging to the roof, surrounded by the center line of pop in the flue, and the flue of the reserved hole slowly down the electric hoist, from top to bottom layer installed flue in place, the center line correction. The center line of the flue and the center line of the reserved hole should be less than 1cm, the deviation of the centerline of the upper and lower flue is not greater than 1cm, and each flue must be guaranteed vertically and vertically.4, the installation of flue should each layer as bearing, bearing steel 2 root diameter over 14mm?.5. After the flue is installed, install the check valve hole at each flueFire type flue check valveFirst, stir the cement with a special glue, coat the edges of the check valve, and then install it at the opening of the check valve.6, the construction should be reserved at all levels of the hole, covered with a cover plate, to ensure safety in construction, to prevent construction waste fall into the flue.7, the flue is thin-walled components, in handling and installation should be gently handle, not to impact, not in the pipeline to pile other heavy objects and walking.8, the roof flue should be in the roof insulation layer, fire layer before construction. 9, the use of gas water heater exhaust system is strictly prohibited.
Q:What is the structure of the check valve of the screw air compressor?
Work process: air pre filter, and then through the air filter and the air inlet controller into the mixing chamber and the compression screw lubricating oil, continuous linear by asymmetric rotor two, compression. The compressed oil and gas mixture enters the tank and the separation system for three levels of separation (centrifugal, self weight, and fine separation). The separated compressed air is discharged after the cooler is cooled, and a reliable pressure switch system controls the exhaust pressure. When the machine is running, the screw compressor run oil system by pressure difference automatic circulation, without pump. When starting, the minimum pressure valve is closed to ensure the minimum pressure required for the lubrication oil circulation. In addition to lubrication, the oil also acts as sealing, cooling and reducing noise. High efficiency oil and gas separator and high efficiency cooler ensure high quality compressed air.
Q:What does the number 16 on the check valve mean?
This is the pressure level of the valve, which represents 16Kg, which is used for piping pressure less than this pressure.
Q:What is the HH44X-16 H of the double acting slow closing check valve? Can you explain it in detail?
2, micro resistance, slow closing check valve, also known as check valve, its role is to prevent the medium back in the pipeline. The opening and closing parts depend on the flow of the medium and the power is turned on or off by itself. 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. Suitable for cleaning medium, not suitable for medium containing solid particles and viscosity.
Q:Can the slow stop disc check valve close quickly?
Slow closing disc check valve does not turn off quickly."Slow closing" means slow closing and fast closing.The butterfly valve is mainly composed of a valve body, two semicircular discs, a return spring, an oil storage tank, a slowly closing small cylinder set, and a needle valve (a micro regulating valve). The principle relies mainly on the thrust of the imported medium and pushes the two discs smoothly.
Q:Check valve h42h-dn80 what does that mean?
According to the provisions of the JB/T 308-2004 valve type programming method:H = check valve4 = connection: flange2 = structure form: vertical lifting typeH = sealing surface material: Cr13 stainless steelDN80== nominal diameter: 80mm
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1. Manufacturer Overview

Location Beijing,China
Year Established 1986
Annual Output Value Above US$100 Million
Main Markets Africa, Asia, America, Europe, Middle East, West Europe
Company Certifications

2. Manufacturer Certificates

a) Certification Name  
Validity Period  

3. Manufacturer Capability

a)Trade Capacity  
Nearest Port Beijing
Export Percentage 41% - 50%
No.of Employees in Trade Department 498 People
Language Spoken: English,Chinese
b)Factory Information  
Factory Size: 42000 square meters
No. of Production Lines Above 20
Contract Manufacturing OEM Service Offered;Design Service Offered
Product Price Range Average