Vertical check valves are specifically designed for vertical pipeline installations. They rely on the upward pressure of the medium to open the valve disc. When the medium flows backward or is interrupted, the valve disc automatically closes under the combined action of its own gravity and the backflow pressure, thus preventing backflow. Its vertical design ensures the valve disc moves in the same direction as the pipeline axis, eliminating the need for additional space to arrange the valve disc's opening trajectory. This makes it suitable for vertical pipelines or installations with limited space.
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Vertical Check Valve Technical parameters
Material:Stainless Steel (SS304, SS316)
Size Range: DN300-DN1200
Connection Options:Flange
Working Pressure:1.0MPa-1.6MPa
Working Temperature:-53°C to 148°C
Sealing Options:PTFE, Graphite
Manufacturing Method:Forging, Carbon Steel
Applicable Medium:Oil, Gas, Water
Manufacturing Standard:ANSI, ASME, GB
Vertical Check Valve Specification Parameters
Main Parts and Materials of Vertical Check Valve
| Part Name |
material |
| Body | Cast iron, ductile iron, carbon steel |
| Flow guide | Cast iron, ductile iron, carbon steel |
| Seat | Bronze, chrome stainless steel |
| Disc | Bronze, chrome stainless steel |
| axis | Bronze, chrome stainless steel |
| spring | stainless steel |
The main shape and connection dimensions of Vertical Check Valve
| model | Nominal diameter | D1 | D2 | D3 | N-ΦD | L | |||||
| 1.0
MPa |
1.6 MPa | 1.0
MPa |
1.6 MPa | 1.0
MPa |
1.6 MPa | 1.0
MPa |
1.6
MPa |
||||
| H42H | DN300 | 370 | 400 | 410 | 460 | 12-13 | 12-28 | 181 | |||
| H42H | DN350 | 429 | 460 | 470 | 520 | 16-23 | 16-28 | 184 | |||
| H42H | DN400 | 480 | 515 | 525 | 580 | 16-28 | 16-31 | 191 | |||
| H42H | DN450 | 530 | 565 | 585 | 640 | 20-28 | 20-31 | 203 | |||
| H42H | DN500 | 582 | 620 | 650 | 715 | 20-28 | 20-34 | 219 | |||
| H42H | DN600 | 682 | 725 | 770 | 810 | 840 | 20-31 | 20-37 | 222 | ||
| H42H | DN700 | 794 | 840 | 840 | 895 | 910 | 24-31 | 24-37 | 280 | ||
| H42H | DN800 | 901 | 950 | 950 | 1015 | 1025 | 24-34 | 24-40 | 356 | ||
| H42H | DN900 | 1001 | 1050 | 1050 | 1125 | 1125 | 28-40 | 28-40 | 368 | ||
| H42H | DN1000 | 1112 | 1160 | 1170 | 1230 | 1255 | 28-43 | 28-43 | 432 | ||
| H42H | DN1200 | – | 1380 | 1390 | 1455 | 1485 | 32-49 | 32-49 | 524 | ||
Vertical Check Valve Structural Features and Advantages
Vertical Installation Design
The valve body is installed vertically, with the inlet and outlet on the same axis, reducing flow path bends and fluid resistance.
Compact internal structure, suitable for space-constrained vertical piping systems (such as high-rise building water supply, boiler rooms, etc.).
Valve Disc Movement Methods
Lift Type: The valve disc moves linearly in the vertical direction, relying on medium pressure and gravity to open and close, providing sensitive action and reliable sealing.
Swing Type (Less Common): The valve disc swings around a hinge, suitable for large-diameter applications, but the lift type is more preferred in vertical structures to adapt to vertical flow.
Sealing and Guiding Design
Sealing Type: Employs soft seals (rubber, PTFE) or hard metal seals. Soft seals are suitable for low pressure and normal temperature, while hard seals are resistant to high temperature and high pressure.
Guiding Structure: The valve disc is equipped with a guide rod or guide rail to ensure stable alignment during opening and closing, reducing wear and jamming, and extending service life.
Spring-Assisted Function
Some models feature a built-in spring that assists the valve disc in quickly closing when the medium pressure drops, preventing water hammer (pressure shock caused by sudden fluid cessation) and protecting pipelines and equipment.
Low Flow Resistance and Energy Efficiency
The straight-through flow channel design reduces turbulence and pressure drop, making it suitable for high-flow-rate conditions and reducing system energy consumption.
Vertical Check Valve Applications
- Water Pump Outlet: Prevents backflow of water when the pump stops, protecting the pump body from water hammer.
- Boiler Feed System: Ensures unidirectional water flow in the steam boiler, preventing steam backflow.
- Chemical Pipelines: Prevents backflow of corrosive media from contaminating upstream equipment.
- Fire Protection System: Maintains a unidirectional supply of fire-fighting water, ensuring efficient fire suppression.
- HVAC System: Controls the circulation direction of refrigerant or hot water, preventing system malfunction.
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