Basic Info.
Model NO.
bv-001
Material
Cast Steel
Structure
Swing
Pressure
Low Pressure
Function
Ddcv Double Lobe, Nrvr Silence
Flow Direction
Unidirection
Application
Industrial Usage, Water Industrial Usage, Household Usage
Delivery Time
15-25 Days
Coating
Customized
Design
BS 1868 / API 6D / ASME B16.34
Size
DN15-DN1200
End Connection
Threaded, Socket Weld
Face to Face
ASME B16.10
End Flange
ASME B16.5
Test
API598
Certificates
CE/ISO/SGS/Mtc
Warranty Time
24 Months
OEM/ODM
Customized
Manufacturer
Yoonad
Trim
Ss AISI 410
Socket Weld End
ANSI B 16.11
Transport Package
Wooden Case
Specification
customized
Trademark
Yoonad
Origin
China
HS Code
8481804090
Production Capacity
10000PCS/Year
Product Description
High-pressure check valve structure and installation method:
1. The disc of the high-pressure check valve is disc-shaped and rotates around the rotating axis of the valve seat channel. Because the channel inside the valve is streamlined, the flow resistance is smaller than that of the lifting butterfly check valve. It is suitable for large-diameter occasions with low flow rate and infrequent flow changes, but it is not suitable for pulsating flow. Its sealing performance is not as good as the lifting type. Butterfly check valves are divided into single-flap type, double-flap type and most-flap type. These three forms are mainly divided according to the valve diameter. The purpose is to prevent the medium from stopping or backflowing and weakening the hydraulic impact.
2. The high-pressure check valve disc slides along the vertical center line of the valve body. The internal thread check valve can only be installed on the horizontal pipe. The disc on the high-pressure small-diameter check valve can be a ball. The valve body shape of the butterfly check valve is the same as that of the stop valve (it can be used with the stop valve), so its fluid resistance coefficient is larger. Its structure is similar to that of the stop valve, and the valve body and disc are the same as the stop valve. The upper part of the valve disc and the lower part of the valve cover are processed with guide sleeves. The valve disc guide sleeve can be freely raised and lowered in the valve guide sleeve. When the medium flows downstream, the valve disc is opened by the thrust of the medium. When the medium stops flowing, the valve disc falls on the valve seat by self-sagg, which prevents the medium from flowing back. The medium inlet and outlet channels of the straight-through butterfly check valve are perpendicular to the direction of the valve seat channel; the medium inlet and outlet channels of the vertical lifting check valve are the same as the direction of the valve seat channel, and its flow resistance is smaller than that of the straight-through type.
3. High-pressure check valve: a check valve in which the valve disc rotates around the pin shaft in the valve seat. The butterfly check valve has a simple structure and can only be installed on horizontal pipes, with good sealing performance.
4. High-pressure check valve: a valve in which the valve disc slides along the center line of the valve body. The pipeline check valve is a new type of valve with small size, light weight, and good processing technology. It is one of the development directions of the check valve. However, the fluid resistance coefficient is slightly larger than that of the swing check valve.
5. High-pressure check valve: This valve is used as a boiler feed water and steam cut-off valve. It has the combined functions of a lift check valve and a stop valve or angle valve.
In addition, there are some check valves that are not suitable for pump outlet installation, such as bottom valves, spring-type, Y-type check valves, etc.
B. High-pressure check valve use and performance specifications:
This valve is used as a device to prevent medium backflow on industrial pipelines.
- Prevents Backflow: The primary function of a check valve is to prevent the backflow of fluids in a piping system. It ensures that the flow of fluid occurs in one direction only, effectively blocking reverse flow. This is especially important in situations where backflow could cause damage, contamination, or interference with the intended flow direction.
- Protects Equipment and Systems: Check valves help safeguard equipment and systems by preventing potential damage caused by reverse flow. They act as a barrier, preventing fluids from flowing back and causing issues such as pump damage, pipe collapse, water hammer, or contamination of sensitive components.
- Maintains Pressure: Check valves assist in maintaining optimal pressure levels within a system. By allowing fluid to flow in the desired direction and preventing backflow, they help maintain the desired pressure conditions, ensuring efficient operation of pumps, regulators, and other pressure-sensitive equipment.
- Enhances System Efficiency: Check valves contribute to the overall efficiency of a system. By preventing reverse flow, they eliminate the need for additional pumps or mechanisms to counteract backflow, thereby reducing energy consumption and operational costs.
- Minimizes Water Hammer: Water hammer, characterized by sudden pressure surges or shockwaves in a system, can lead to pipe damage and system failure. Check valves help mitigate water hammer by preventing reverse flow and the subsequent pressure spikes that can occur.
- Allows for System Isolation and Maintenance: Check valves provide a means of isolating sections of a system for maintenance or repairs. By closing off the valve, the flow of fluids can be stopped in a specific direction, allowing for safe and efficient maintenance procedures.
During the use of this valve, the medium flows in the direction of the arrow shown in the figure.
1. When the medium flows in the specified direction, the valve disc is opened by the force of the medium; when the medium flows back, due to the deadweight of the valve disc and the reverse force of the medium, the valve disc and the sealing surface of the valve seat are tightly closed, so as to prevent the backflow of the medium.
2. The sealing surface of the valve body and valve disc is welded with stainless steel.
3. The structural length of this valve is in accordance with the provisions of GB12221-1989, and the flange connection size is in accordance with the provisions of JB/T79-1994.
In pipes and similar devices and equipment, check valves are generally used to prevent a reverse flow by allowing materials or fluids to flow in only one direction. Despite their various forms, sizes, and functions, these valves generally operate based on the same principle.
The primary components of a check valve include the Body,Body Seats,Gasket,Cover Plate,Hinge,Nuts,Washer.
| NPS | DN | API US Standard swing check valve size list |
| |||||||
| Type | in | mm | L | D | D1 | D2 | b | z-Фd | H | W(kg) |
| H44H-150Lb | 2" | 50 | 203 | 152 | 120.6 | 92 | 19 | 4-Ф19 | 161 | 17 |
| H44W-150LbP | 21/2" | 65 | 216 | 178 | 139.7 | 105 | 22 | 4-Ф19 | 180 | 23 |
| H44Y-150LbP | 3" | 80 | 241 | 190 | 152.4 | 127 | 24 | 4-Ф19 | 190 | 33 |
| H44Y-150LbR | 4" | 100 | 292 | 229 | 190.5 | 157 | 24 | 8-Ф19 | 203 | 44 |
| H44Y-150LbPL | 5" | 125 | 330 | 254 | 215.9 | 186 | 24 | 8-Ф22 | 229 | 62 |
| H44Y-150LbRL | 6" | 150 | 356 | 279 | 241.3 | 216 | 25 | 8-Ф22 | 257 | 78 |
|
| 8" | 200 | 495 | 343 | 298.4 | 270 | 29 | 8-Ф22 | 292 | 137 |
|
| 10" | 250 | 622 | 406 | 362 | 324 | 30 | 12-Ф25 | 355 | 207 |
|
| 12" | 300 | 698 | 483 | 431.8 | 381 | 32 | 12-Ф25 | 396 | 279 |
|
| 14" | 350 | 787 | 533 | 476.2 | 413 | 35 | 12-Ф29 | 445 | 387 |
|
| 16" | 400 | 864 | 597 | 539.8 | 470 | 37 | 16-Ф29 | 490 | 446 |
|
| 18" | 450 | 978 | 635 | 577.8 | 533 | 40 | 16-Ф32 | 520 | 621 |
|
| 20" | 500 | 978 | 698 | 635 | 584 | 43 | 20-Ф32 | 546 | 770 |
|
| 24" | 600 | 1295 | 813 | 749.3 | 692 | 48 | 20-Ф35 | 880 | 970 |
| H44H-300Lb | 2" | 50 | 267 | 165 | 127 | 92 | 22 | 8-Ф19 | 180 | 20 |
| H44W-300LbP | 21/2" | 65 | 292 | 190 | 149.4 | 105 | 25 | 8-Ф22 | 190 | 24 |
| H44Y-300LbP | 3" | 80 | 318 | 210 | 168.1 | 127 | 29 | 8-Ф22 | 212 | 40 |
| H44Y-300LbR | 4" | 100 | 356 | 254 | 200.2 | 157 | 32 | 8-Ф22 | 246 | 51 |
| H44Y-300LbPL | 5" | 125 | 400 | 279 | 235 | 186 | 35 | 12-Ф22 |
| 65 |
| H44Y-300LbRL | 6" | 150 | 444 | 318 | 269.7 | 216 | 37 | 12-Ф25 | 292 | 90 |
|
| 8" | 200 | 533 | 381 | 330.2 | 270 | 41 | 16-Ф29 | 328 | 175 |
|
| 10" | 250 | 622 | 444 | 387.4 | 324 | 48 | 16-Ф32 | 379 | 210 |
|
| 12" | 300 | 711 | 521 | 450.6 | 381 | 51 | 20-Ф32 | 420 | 286 |
|
| 14" | 350 | 838 | 584 | 514.4 | 413 | 54 | 20-Ф35 | 530 | 400 |
|
| 16" | 400 | 864 | 648 | 571.5 | 470 | 57 | 20-Ф35 | 584 | 550 |
|
| 18" | 450 | 978 | 711 | 628.6 | 533 | 60 | 24-Ф35 | 610 | 700 |
|
| 20" | 500 | 1016 | 775 | 685.8 | 584 | 64 | 24-Ф41 | 860 | 860 |
|
| 24" | 600 | 1346 | 914 | 812.8 | 692 | 70 | 28-Ф44 | 203 | 1931 |
| H44H-600Lb | 2" | 50 | 292 | 165 | 127 | 92 | 25 | 8-Ф19 | 203 | 34 |
| H44W-600LbP | 21/2" | 65 | 330 | 190 | 150 | 105 | 29 | 8-Ф22 | 229 | 45 |
| H44Y-600LbP | 3" | 80 | 356 | 210 | 168 | 127 | 32 | 8-Ф22 | 235 | 63 |
| H44Y-600LbR | 4" | 100 | 432 | 273 | 216 | 157 | 38 | 8-Ф25 | 286 | 114 |
| H44Y-600LbPL | 5" | 125 | 508 | 330 | 266 | 186 | 44 | 8-Ф29 | 292 | 160 |
| H44Y-600LbRL | 6" | 150 | 559 | 356 | 292 | 216 | 48 | 12-Ф29 | 330 | 207 |
|
| 8" | 200 | 660 | 419 | 349 | 270 | 56 | 12-Ф32 | 381 | 387 |
|
| 10" | 250 | 787 | 508 | 432 | 324 | 64 | 16-Ф35 | 457 | 580 |
|
| 12" | 300 | 838 | 559 | 489 | 381 | 67 | 20-Ф35 | 584 | 778 |
|
| 14" | 350 | 889 | 603 | 527 | 413 | 70 | 20-Ф38 | 635 | 869 |
|
| 16" | 400 | 991 | 686 | 603 | 470 | 76 | 20-Ф41 | 684 | 1380 |
