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The YH71 Wafer Lift Check Valve is an automatic valve that relies on the flow of the medium itself to automatically open and close the disc to prevent backflow. Featuring a wafer connection, the valve has an extremely short face-to-face dimension and a compact volume, making it ideal for piping systems with limited installation space. The lift disc design, integrated with a precision spring, ensures rapid closure in both horizontal and vertical pipelines, effectively eliminating water hammer and protecting pumps, compressors, and downstream equipment.

Product Image:YH71 Wafer Lift Check Valve
Feature
1、Ultra-Short Compact Structure: The wafer design results in a face-to-face length much shorter than traditional flanged check valves, significantly saving space and reducing system weight.
2、Optimized Lift Guidance: The disc is equipped with a precision guidance device for smooth movement, preventing misalignment or jamming under high-velocity fluid impact.
3、Silent & Anti-Water Hammer: The built-in high-performance spring assists in pre-closing the disc before backflow occurs, significantly reducing noise and system water hammer impact.
4、Long-Life Sealing Surface: The sealing surfaces of the seat and disc are hard-faced or precision-lapped to resist erosion and corrosion, ensuring tightness over long periods.
5、Installation Flexibility: Its compact design allows for installation in horizontal lines or vertical lines with an upward flow direction.
6、Low Pressure Drop: The flow path is hydrodynamically designed to allow full disc opening, ensuring minimum pressure drop during high-flow conditions.

Structure Diagram:YH71 Wafer Lift Check Valve
Material List
| No. | Parts | Material |
| 1 | BODY | CF8 / CF8M |
| 2 | DISC | CF8 / CF8 / CF8M |
| 3 | SPRING | 304 / 304 / 316 |
| 4 | BONNET | CF8 / CF8M |
Performance Specification Sheet
| Performance Specification Sheet | ||||
| Nominal Pressure | 1.6 | 2.5 | 4.0 | MPa |
| Strength test pressure | 2.4 | 3.8 | 6.0 | |
| Sealing test pressure | 1.76 | 2.8 | 4.4 | |
| Applicable Temperature | -40~180 | ℃ | ||
Standard requirements for external dimensions
Product approved by PED97/23/EC (CE0036)
Casting approved by AD2000-W0
Inspection & Testing: API598, EN12266

Outline Diagram:YH71 Wafer Lift Check Valve
Outline Dimension Table (Unit:mm)
| Size(Inch) | Size(DN) | d | L | D |
| 2" | DN50 | 25 | 15 | 104 |
| 2-1/2" | DN65 | 38 | 15 | 125 |
| 3" | DN80 | 46 | 16 | 140 |
| 4" | DN100 | 71.5 | 16 | 160 |
| 5" | DN125 | 95 | 17 | 185 |
| 6" | DN150 | 115 | 19 | 220 |
| 8" | DN200 | 140 | 26 | 270 |
| 10" | DN250 | 188 | 29 | 330 |
| 12" | DN300 | 216 | 38 | 380 |

Model:
YH76-10P/YH76-16P/YH76-25P/YH76-10R/YH76-16R/YH76-25RSpecification:
DN50-DN1200Pressure:
PN10~25Material:
Deionized water, Ethylene glycol, Propylene glycol solution, Mineral oil, Synthetic oil, Silicone oil, Perfluoropolyether (PFPE), Hydrofluoroether (HFE)
Model:
YQ21-63P/YQ21-63RSpecification:
DN6-DN25Pressure:
PN63Material:
CF8, CF8M
Model:
YQ681F-10P/YQ681F-10R/YQ681F-16P/YQ681F-16R/YQ681F-25P/YQ681F-25RSpecification:
DN20-DN100Pressure:
PN10~25Material:
CF8, CF8M