Custom Butterfly type micro resistance slow closing check valve Supplier, Manufacturers
Product Description
Product Specifications
| Valve Type | Tilting disc check valve | Structure | Swing type |
|---|---|---|---|
| Standard | EN / DIN / API | Workmanship | Investment casting |
| Sealing Direction | Single-directional | Sealing Grade | Zero leakage |
| Temperature | -20°C < T < 120°C | Operation | Self-starting |
Characteristics
This tilting disc slow closing check valve is made of epoxy coated GGG40 ductile iron. Equipped with external hydraulic buffer for two-stage closing to eliminate water hammer and impact noise. Full EPDM coated disc achieves zero leakage, low flow resistance saves pump power. Standard flanged design, widely applied in municipal water supply, sewage and fire protection pump station pipeline systems.
Key Advantages
The tilting disc slow closing check valve has a two-stage slow closing structure that greatly suppresses water hammer surge, prevents pump reversal and pipeline damage, reducing maintenance frequency for pump station systems.
The eccentric disc slow closing check valve brings ultra-low flow resistance and large flow capacity, cutting long-term power consumption for continuous water delivery pump stations.
Epoxy coated ductile iron body features excellent anti-corrosion performance. Standard flange size realizes direct replacement of old valves without pipeline reconstruction, saving engineering transformation cost.
Packaging & Delivery
Standard export wooden case packaging
Application Scenarios
This water hammer proof one way valve widely used in municipal water supply pump stations, sewage treatment plant pipelines, high-rise fire water systems, HVAC circulating water pipes, large farmland irrigation pump stations and industrial park water supply mains.
Material of Main Parts
| Components Name | Valve Body | Valve Petal | Valve Lever, Cylinder, Piston | Spring | Valve Seat |
|---|---|---|---|---|---|
| Material | Cast iron, cast steel | Carbon steel | Stainless steel | Stainless steel | Ding nitrile rubber |
Main Dimensions
| DN (mm) | L | H | H1 |
|---|---|---|---|
| 40 | 140 | 200 | 88 |
| 50 | 150 | 215 | 98 |
| 65 | 170 | 225 | 108 |
| 80 | 180 | 235 | 118 |
| 100 | 190 | 280 | 130 |
| 125 | 200 | 290 | 148 |
| 150 | 210 | 310 | 172 |
| 200 | 230 | 350 | 210 |
| 250 | 250 | 415 | 240 |
| 300 | 270 | 450 | 264 |
| 350 | 290 | 480 | 297 |
| 400 | 310 | 550 | 324 |
| 450 | 330 | 585 | 351 |
| 500 | 350 | 640 | 379 |
| 600 | 390 | 720 | 434 |
| 700 | 430 | 780 | 491 |
| 800 | 470 | 840 | 549 |
| 900 | 510 | 990 | 600 |
| 1000 | 550 | 1050 | 655 |
| 1200 | 630 | 1210 | 770 |
Frequently Asked Questions
A tilting disc slow closing check valve is an automatic non-return valve built with an eccentric pivot disc and an external hydraulic damper. It opens smoothly during fluid flow and closes in two stages to prevent backflow while effectively suppressing water hammer.
The valve rapidly closes through the first 80-90% of its travel stroke to shut off reverse flow quickly, then gradually completes the remaining 10-20% under hydraulic buffering to safely cushion fluid impact force and noise.
Our valves are manufactured to conform to EN, DIN, and API international standards with nominal sizes ranging from DN40 up to DN1200, allowing direct retrofit and easy flange installation.
The valve disc features a resilient, full EPDM coating paired with precision sealing surfaces, achieving tight zero-leakage sealing across working temperatures from -20°C to 120°C.
They are ideal for municipal clean water supply, wastewater treatment, high-rise building fire suppression systems, HVAC circulating lines, and industrial pump station pipelines.
No, the valve relies on self-starting automatic operation driven by inline medium differential pressure without requiring external electrical or pneumatic power sources.
