Wafer Lift Check Valve
Product Model: H71H / H71W Series Wafer Lift Check Valve
Pressure Rating: PN16, PN25, PN40 (1.6/2.5/4.0MPa)
Connection Type: Wafer type
Structure: Lift type with spring-assisted disc
Body Material: 2Cr13 (H71H), 1Cr18Ni9Ti (H71W-P), 1Cr18Ni12Mo2Ti (H71W-R)
Applicable Media: Water, steam, oil, nitric acid, acetic acid and other corrosive media
Working Temperature: ≤425℃ (H71H), ≤200℃ (H71W)
Core Function: Automatically prevents medium backflow, reduces water hammer pressure
Application Scenarios: Urban construction, high-rise building water supply, chemical, petrochemical, pharmaceutical, industrial pipeline systems
Gaoshan Valve – H71H / H71W Wafer Lift Check Valve
Model Series: H71H-16C/25/40, H71W-16P/25P/40P, H71W-16R/25R/40R | Pressure Class: PN16~PN40 | Connection: Wafer
H71H/H71W wafer lift check valve is an automatic anti-backflow valve composed of body, disc and spring. It can be installed horizontally or vertically in pipeline systems to prevent medium backflow, suitable for water, steam, oil, nitric acid, acetic acid and other corrosive media.
✅ Core Features & Advantages
- Compact & Lightweight Design: Short structure length (only 1/4-1/8 of traditional flanged check valves), small volume and light weight, easy to install and maintain.
- Fast Closing & Low Water Hammer: The disc closes quickly with spring assistance, reducing water hammer pressure by 50%-80% to protect pipelines and equipment.
- Low Fluid Resistance & High Sensitivity: Smooth flow path design minimizes fluid resistance, with quick disc response and reliable sealing performance.
- Flexible Installation Options: Suitable for both horizontal and vertical pipeline installation, adapting to various working conditions.
- Multi-Material Configuration: Available in cast steel (2Cr13), stainless steel (1Cr18Ni9Ti/1Cr18Ni12Mo2Ti) and other materials, suitable for corrosive media like nitric acid and acetic acid.
- Wide Application Range: Widely used in urban construction, industry, high-rise building water supply and drainage, chemical, petrochemical, pharmaceutical and other fields.
📊 Performance Specifications
| Model | Nominal Pressure (MPa) | Shell Test Pressure (MPa) | Seal Test Pressure (MPa) | Working Temperature (℃) | Applicable Medium |
|---|---|---|---|---|---|
| H71H-16C / H71H-25 / H71H-40 | 1.6 / 2.5 / 4.0 | 2.4 / 3.8 / 6.0 | 1.8 / 2.8 / 4.4 | ≤425 | Water, Steam, Oil |
| H71W-16P / H71W-25P / H71W-40P | 1.6 / 2.5 / 4.0 | 2.4 / 3.8 / 6.0 | 1.8 / 2.8 / 4.4 | ≤200 | Nitric Acid Corrosive Media |
| H71W-16R / H71W-25R / H71W-40R | 1.6 / 2.5 / 4.0 | 2.4 / 3.8 / 6.0 | 1.8 / 2.8 / 4.4 | ≤200 | Nitric Acid Corrosive Media |
🛠️ Main Component Materials
| Component | H71H Series | H71W-P Series | H71W-R Series |
|---|---|---|---|
| Valve Body | 2Cr13 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
| Valve Disc | 2Cr13 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
| Spring | 50CrVA / 1Cr18Ni9 | 1Cr18Ni9Ti | 1Cr18Ni9Ti |
📐 Main Dimensions & Weights (PN10~PN40)
| DN (mm) | L (mm) | D (mm) | Weight (kg) |
|---|---|---|---|
| 15 | 16 | 53 | 0.3 |
| 20 | 19 | 63 | 0.5 |
| 25 | 22 | 73 | 0.7 |
| 32 | 28 | 84 | 1.2 |
| 40 | 32 | 94 | 1.5 |
| 50 | 40 | 109 | 2.2 |
| 65 | 46 | 129 | 3.1 |
| 80 | 50 | 144 | 4.0 |
| 100 | 60 | 164 | 5.2 |
| 125 | 90 | 194 | 8.6 |
| 150 | 106 | 220 | 11.6 |
*Dimensions are for reference only. Contact us for complete drawings for your specific model.
Product Image & Structure Drawing
📝 Design & Manufacturing Standards
- Design Standard: JB/T, GB/T 12235
- Face-to-Face Dimensions: GB/T 12221
- Connection Standard: Wafer type, suitable for standard flanges
- Testing & Inspection: GB/T 13927, JB/T 9092
⚙️ Installation & Maintenance Guidelines
- Installation Requirements: Wafer type connection, clamped between two pipeline flanges. Do not let the check valve bear the weight of the pipeline; large-caliber valves need independent support.
- Flow Direction: Install the valve with the medium flow direction matching the arrow marked on the valve body.
- Mounting Configuration: Suitable for both horizontal and vertical pipeline installation. Vertical lift check valves should be installed on vertical pipelines, and horizontal lift check valves on horizontal pipelines.
- Routine Maintenance: Regularly inspect the valve body, disc, spring and sealing surfaces for wear or damage. Keep the pipeline free of debris to prevent jamming, ensuring reliable anti-backflow performance.
Get Custom Quotation & Technical Support
Contact us for full dimension sheets, CAD drawings, and customized solutions for your pipeline system.