• Butterfly Buffering Check Valve

check valve with counter weight

Features: Nominal pressure: 1.0~2.5MPa
Nominal pass through: 40~1400mm
Applicable medium: water, oil, sewage, seawater
Applicable temperature: 0~80℃ (up to 200℃ if necessary)
Flange standard: GB/T 17241.6 GB/T 9113
Test standard: GB/T 13927 AP1598

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  • Standards&Features
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Parameter:

The buffer check valve produced by our factory is mainly used at the pump outlet of industrial water supply and sewage treatment plant to prevent the backflow of the medium in the pipe network. Destructive water hammer is automatically eliminated so that pumps and piping are not damaged. The valve is mainly characterized by valve body, cutting flap and good buffer performance. It is the best product for industrial water and urban sewage.

 

 

Main external connection dimensions 

 

DNmm)

200

250

300

350

400

450

500

600

700

800

900

1000

1200

1400

L

230

250

270

290

310

330

350

390

430

470

510

550

630

710

H

550

630

690

780

860

910

980

1070

1220

1320

1430

1550

1800

1980

B1

540

600

650

710

770

830

900

1090

1200

1320

1420

1550

1780

2000

Standards&Features:

Check valve is mainly composed of valve body, butterfly plate, regulating valve, and buffer cylinder. Buffer cylinder is also composed of two oil chambers, connected internally by a one-way valve, and externally connected by a regulating valve. When the valve is opened, the medium water pushes the butterfly plate.

At this time, the hydraulic oil in the buffer cylinder quickly flows from cavity 1 to cavity 2 through the check valve inside. When the valve is closed, the medium returns to the first cavity.

Due to the large impact force of the counterweight and the high pressure wave, the valve flap is mostly closed, and the oil in the second cavity is compressed at the same time. Normal opening of the regulating valve is only 1/3. The high pressure oil compressed in the 2 cavity can only flow slowly into the 1 cavity through this 1/3 area, so that the valve flap is slowly closed and the pressure of the water hammer peak is weakened. Limits the generation of destructive water hammer.

Due to the function of the above-mentioned regulating valve, the time for the hydraulic oil to flow from cavity 2 back to cavity 1 can be adjusted by adjusting its opening. That is to adjust the closing speed of the valve. Therefore, when the opening degree of the regulating valve is smaller, closing speed of the corresponding valve is slower. Then longer the water discharge, the smaller the water hammer, and vice versa. Users can adjust appropriately according to the needs of the scene. 


SPECIFICATIONS FOR HYDRAULIC CHECK VALVES

 

 

 

Pressure rating and size:

PN10, PN16

 

DN200 to DN2000

 

8"~80"

Material:

Body : GGG40, GGG50

 

Disc  : GGG40, GGG50, SS304, SS316

 

Stem : 1Cr13, SS304, SS316

 

Seal : NBR, EPDM

 

Body Seat : F6a, SS304, SS316

Operated type

Hydraulic

Structure:

Tilting disc, with lever and counter, hammer

Flange connection:

EN1092 PN10, PN16

Medium:

Water, sewage

Temperature:

10 to 80°C

Case:

Project description:

WESDOM customizes the most suitable solutions for customers according to the actual needs of customers’ working conditions;

Client feedback:

WESDOM products are of high quality, Now all products have well installed on site.

Project pictures:
 

Application:

The valve is mainly characterized by valve body, cutting flap and good buffer performance. It is the best product for industrial water and urban sewage.

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