HH46X Disc Slow Closing Check Valve
• Low head loss structure reduces pipeline energy consumption
• Two-stage hydraulic slow closing eliminates water hammer
• Rubber soft seal ensures zero leakage and long service life
• 3~60 seconds adjustable closing time for various working conditions
• Suitable for water supply, drainage, sewage and seawater pipelines
Gaoshan Valve HH46X Micro-resistance Slow Closing Butterfly Check Valve
Flanged Dual Disc Anti-water Hammer Check Valve for Water Supply & Sewage Pipeline
Product Brief Highlights
- Micro-resistance Flow Design: Optimized butterfly disc structure greatly reduces pipeline head loss, saving long-term operating energy consumption.
- Two-stage Hydraulic Slow Closing: Unique fast-close & slow-close mechanism thoroughly eliminates water hammer and prevents pump reverse rotation.
- Full Rubber Soft Seal: NBR rubber sealing surface achieves zero leakage, featuring excellent wear resistance and aging resistance.
- Adjustable Closing Time: 3~60 seconds adjustable slow-closing time to adapt to various pipeline working conditions.
- Compact & Durable Structure: Integrated casting process, small volume, light weight, easy installation and maintenance.
- Wide Media Compatibility: Suitable for clean water, sewage, seawater and conventional industrial fluid pipelines.
1. Product Overview
The Gaoshan Valve HH46X micro-resistance slow closing butterfly check valve is a new-generation pipeline protection valve optimized for municipal water supply, drainage, sewage treatment and industrial water systems. Adopting a dual-disc butterfly symmetrical structure and hydraulic buffer slow-closing technology, the valve effectively solves common problems of traditional check valves such as large flow resistance, severe water hammer and easy leakage.
During medium forward flow, the valve disc opens freely with minimal flow resistance, ensuring efficient pipeline operation. When the pipeline pressure drops and fluid backflow occurs, the valve realizes two-stage closing: fast closing to prevent pump reverse rotation and slow closing to eliminate water hammer pressure impact. The full rubber soft seal design ensures absolute tight shut-off, fully protecting water pumps, pipes and auxiliary equipment from backflow damage.
2. Key Features
- Ultra-low Head Loss: Streamlined butterfly disc structure reduces fluid resistance significantly, lowering system energy consumption and operating costs.
- Professional Anti-water Hammer: Two-stage hydraulic buffer closing design suppresses water hammer peak pressure, protecting the entire pipeline system safely.
- Zero Leakage Performance: Integral rubber soft seat fits closely with the valve disc, achieving bubble-tight shut-off without medium leakage.
- Flexible Adjustable Performance: The slow-closing time can be adjusted freely within 3-60 seconds to match different pipe diameters and flow rates.
- Premium Material Configuration: High-strength cast iron/cast steel body and stainless steel internal parts ensure corrosion resistance and long service life.
- Easy Installation & Maintenance: Compact integrated structure, no complex accessories required, convenient for on-site installation and daily maintenance.
- Standard Compliance: Manufactured and tested in strict accordance with GB/T 12233, GB/T 13927 and API 598 international standards.
3. Technical Specifications
| Parameter | Specification |
|---|---|
| Model | HH46X-10, HH46X-16, HH46X-16C, HH46X-25 |
| Nominal Diameter | DN40 ~ DN1200 |
| Nominal Pressure | PN1.0 / PN1.6 / PN2.5 MPa |
| Shell Test Pressure | 1.5 / 2.4 / 3.75 MPa |
| Seal Test Pressure | 1.1 / 1.76 / 2.75 MPa |
| Slow Closing Time | 3 ~ 60 seconds (Adjustable) |
| Working Temperature | -10°C ~ 120°C |
| Applicable Medium | Clean water, sewage, seawater, air |
| Connection Type | Flanged |
| Execution Standard | GB/T 12233, GB/T 13927, API 598 |
4. Materials of Construction
| Part Name | Material |
|---|---|
| Valve Body | HT200 Cast Iron / WCB Cast Steel |
| Valve Disc | QT450-10 Ductile Iron / WCB |
| Stem & Piston | 2Cr13 / 304 Stainless Steel |
| Spring | Stainless Steel |
| Sealing Ring | NBR Rubber |
5. Structure Drawing & Dimensions
HH46X Check Valve External Structure & Dimension Marking Diagram
| DN(mm) | L(mm) | H(mm) | H1(mm) | Weight(kg) |
|---|---|---|---|---|
| 40 | 140 | 200 | 88 | – |
| 50 | 150 | 215 | 98 | 25 |
| 65 | 170 | 225 | 108 | 30 |
| 80 | 180 | 235 | 118 | 47 |
| 100 | 190 | 280 | 130 | 65 |
| 150 | 210 | 310 | 172 | 108 |
| 200 | 230 | 350 | 210 | 154 |
| 300 | 270 | 450 | 264 | 237 |
| 400 | 310 | 550 | 324 | 438 |
| 500 | 350 | 640 | 379 | 682 |
| 600 | 390 | 720 | 434 | 890 |
6. Installation & Maintenance Guidelines
- Install the valve strictly according to the fluid flow direction arrow marked on the valve body to ensure normal opening and closing operation.
- Horizontal installation is recommended for optimal buffer and anti-water hammer performance; vertical installation is allowed for small caliber valves.
- Large-diameter valves must be equipped with independent supports to avoid pipeline pressure bearing on the valve body.
- Clean pipeline impurities thoroughly before installation to prevent hard particles from scratching the rubber sealing surface and causing leakage.
- Adjust the slow-closing time according to actual pipeline conditions to avoid excessive pressure fluctuation or backflow residue.
- Regularly check the sealing condition and buffer device, and lubricate movable parts periodically to ensure flexible operation.
7. Typical Applications
Gaoshan Valve HH46X micro-resistance slow closing check valves are widely applied in various pipeline systems requiring anti-backflow and anti-water hammer protection:
- Municipal water supply and water delivery pipe networks
- Urban sewage and drainage treatment projects
- Water plant pumping station and booster pump pipeline systems
- Industrial circulating water and wastewater discharge pipelines
- Building water supply and HVAC supporting systems
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Gaoshan Valve is a professional manufacturer of high-quality pipeline valves, providing reliable, energy-saving and durable check valve solutions for global municipal and industrial projects. We support customized specifications and fast delivery.
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