BFEA Best Selling Check Valve

Ref Price:

Loading Port:: Qingdao Port

Payment Terms:: TT or L/C

Min Order Qty:: 20 sets pc

Supply Capability:: To Order pc/month

Inquire Now

Chat Online

Add to My Favorites

OKorder Service Pledge

Quality Product, Order Online Tracking, Timely Delivery

OKorder Financial Service

Credit Rating, Credit Services, Credit Purchasing

You Might Also Like

Wafer Dual Plate Check Valve

Wafer Check Valve Universal Standard

Wafer Type Double Door Butterfly Check Valve

Threaded Type Ball Check Valve

Thread Type Ball Check Valve PN10/16

Lift Check Valve Cast Iron

Swing Check Valve

valve of china 3900

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

Q:Which kind of steam check valve is good?: Steam check valve selection spring pressure check valve is better, can be sealed tight.Check valve, also known as one-way valve or check valve, its role is to prevent the medium back in the pipeline. Pump water off the bottom valve check valve also belongs to class. 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.

Q:Is the tank stop valve a non-return valve or a check valve?: The valve has a knob, and the controller can control the forward flow. Because of its special structure, the fluid can not flow backwards even if there is no artificial valve.

Q:Detailed distinction between backflow preventer and check valve: The backflow preventer consists of two separated check valves and a drain valve. Due to the local head loss of the check valve, the pressure in the middle cavity is always lower than the pressure at the inlet. This pressure difference causes the drain valve to be closed and the pipe is in normal water supply. In abnormal pressure (i.e., the outlet pressure is higher than that of the middle cavity), even if the two check valve can not reverse sealing, safety relief valve can automatically open the reverse water emptying, and the formation of air separation, ensure the health and safety of water upstream.Check valves are plain check valves, only one side seal. Backflow preventer is more expensive than ordinary check valve. Double protection and heavy protection!

Q:Is it better to have explicit rules in the relevant specifications? Thank you, ah, ah, urgent.: 8.5.5 vertical exhaust lines for kitchens, bathrooms, toilets, etc., should be taken to prevent backflow or to set fire dampers on the branch pipe.In addition, there are similar provisions in the code for fire protection in architectural design, which are not stated.

Q:Tap water tank with vertical and horizontal check valve.: Extrusion includes seat and plate or piston designed to prevent the valve slamming. Additional material added to the seat produces two extrusion zones. Try to squeeze the fluid out of these areas and slow down the valve during rapid closing. But there is a price to pay for that. The limited gap increase region is an ideal site for collecting small solid particles. The squeeze pressure protection for controlled closure, due to the collection of solids, may cause additional problems, unless the gap is sufficiently extruded, the solids can be ejected. A narrow seal may shatter a fragile solid, such as coal. The extrusion zone tends to expand the width of the available valve seat and reduce the ability of the valve to crush solids. This effect must be considered, taking into account all the characteristics of the related solids.

Q:Ball shaped sewage check valve pictures and working principle of the structure.: 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:There is a check valve at the inlet of Haier electric water heater to prevent water from flowing back. Because there are many hot water used in the house, should the hot water be fitted with check valve?Can the hot water outlet be fitted with check valves? The hot water pipe is too long for hot water to flow back into the heater... Is it possible to install two check valves to affect the normal use of the heater?: The cold water pipe already has a check valve. In fact, it also returns the hot water pipe. It also returns the hot water with cold water. It has already met your demand well. To the hot water pipe and then put a completely make an unnecessary move! And it's impossible to get hot water back again. May you enjoy the joy and happiness of hot water!

Q:Use of fire pump adapter even before you install a check valve: Multifunctional pump combination device usually comes with safety valves and check valves, usually 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 the pipes below plus a check valve, a higher temperature of the South may be suitable for direct use of non frozen.

Q:What is the difference between the silent check valve and the silent check valve?: The valve of the check valve is guided by the central axis at both ends of the inlet and outlet. It is flexible for opening and closing.

Q:Pump adapter need check valve?: Pump adapter need check valve?

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
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
Range
Reference
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