Best Price Check Valve

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Min Order Qty:: 20 sets pc

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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 Valve

Size	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 directly.

Dimensions of Check Valve

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 producing department of Check Valve

Check Valve

The deatail and the package

Check Valve

Q:What is the material of H41W-16's check valve?: According to: JB/T 308-2004 "valve type programming method"H check valve4 flange connection1 lift through straight through valve passageW sealing cover for body material16 nominal pressure PN16When the nominal pressure is less than or equal to PN16, do not mark the material code of the valve body, the valve body material is gray iron

Q:Is it better to have explicit rules in the relevant specifications? Thank you, ah, ah, urgent.: 8.5.3.2 through ventilation, air conditioning room and important or fire danger room, partition and floor.8.5.3.3 vertical air duct with horizontal pipe section at each level of the horizontal air pipe.8.5.3.4 passes through both sides of the deformation joint.8.5.4 fire valve action temperature should be 70 degrees.

Q:Butterfly check valve should be equipped with special flange for butterfly valve: No, with a special appearance Jansen point flange butterfly valve. It can barely be installed without special flanges

Q:Tap water tank with vertical and horizontal check valve.: Look at your pipe installation position, if it is vertical, of course, the vertical check valve is good, if it is horizontal, of course, choose a horizontal check valve.The function of the check valve is to ensure the flow of the fluid in one direction. The moving parts are usually pressed against the seat to form a seal. Small pressure must be applied to moving parts to open the valve. Once opened, fluid power is generated to allow the valve to open or increase opening. Before the valve closes, fluid flow must stop. Fluid power generated by fluid flow prevents all valves from closing. The spring can be used or not to control the opening and to close it. Some check valves rely solely on gravity to provide closing force. Valves that rely on gravity must be installed according to the manufacturer's instructions. If horizontal pipes are laid, the slope of a short distance local pipe must be changed.The swing check valve is powered by gravity. When the valve is opened, the force required to control the valve opening is increased. If the balance between disc weight and fluid dynamic force is incorrect, the valve will not be fully opened. Increasing flow speed may cause unexpected corrosion or erosion damage, so gravity driven valves must be used to meet operating conditions.When the valve is fully opened, the disc or piston stroke must be limited by the stopper. Fully open valve, but not limited, the valve is easy to vibration. Vibration may cause hinge pins or pistons to wear rapidly. Valves using springs may suffer from early spring faults (caused by fatigue). Vibration may be caused by vortices or disturbances. When the fluid has some viscosity, the fluid damping can control the vibration. Valves with springs may be fitted with different rigid springs. If the full stroke stops, including extrusion, to prevent backlash after rapid opening, this can be an effective vibration damper.

Q:Does the check valve damage affect the flow rate?: Ball check valve will not affect the flow, such as the clip type check valve once damaged, it will affect the flow.

Q:Our unit pump outlet check valve installed in the vertical pipe, the use of the valve to stop the valve is more serious impact, is not installed, the valve should be how to install it?: Check valves shall be installed on the vertical pipe. Select a model, such as a slow closing check valve (water hammer) or a spring check valve.

Q:An introduction to the check valve: The check valve, also known as reverse flow valve, check valve, back pressure valve, one-way valve. This kind of valve is automatically opened and closed by the force produced by the flow of the medium of the pipeline itself. It belongs to an automatic valve.

Q:What is the function of the stop valve and check valve installed on the water supply pipe?: 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:Fire hood fire check valve okay?: Lampblack machine flue check valve is generally installed in the hood outlet check valve, the valve has two blades, a reset spring, exhaust hood leaf was blown open, lampblack machine stop when the blade is spring pressed into the closed state, now is basically take lampblack machine the check valve check valve, but the general tightness is not very good, open the hood can be seen around the gap.

Q:What does "H" for H42W check valves mean?: through type ---1B. vertical ---2SwingA. single ---4B. multi flap ---5C. double flap ---6ButterflyA. double valve ---7B. single ---8Shuttle ----9H: Valve code, is the check valve code, 4: connection mode is flange connection; 2: valve form is vertical lift; W: sealed form, on behalf of the body of the sealing surface

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