HH44X micro-resistance slow-closing check valve consists of valve body, valve cover, valve flap, valve shaft and regulating valve, etc. It is installed at the outlet of the pump to prevent the medium from backflow and eliminate destructive water hammer, and can effectively reduce the water hammer pressure of the valve closure, which can guarantee the safe operation of the pipeline network. It is characterized by light valve flap, large opening, small fluid resistance, novel design of water hammer elimination mechanism, reliable sealing, long service life, smooth operation, no vibration, no noise and so on.
Product Features
- The micro-resistance slow-closing check valve features a lightweight disc, large opening capacity, minimal electrical energy loss, low fluid resistance, an innovative water hammer elimination mechanism, stable and reliable sealing performance, wear resistance, extended service life, smooth operation, and vibration-free, noise-free performance.
- Equipped with a counterweight mechanism. When the valve disc rotates, it offers minimal resistance to water flow, requiring only one-fifth of the operating force of conventional swing valves, making it an energy-efficient product.
- A damping device is installed during the final stage of valve closure, with adjustable damping time, to prevent destructive water hammer effects.
- Innovative rubber-lined valve disc design ensures reliable sealing, corrosion resistance, vibration damping, wear resistance, extended service life, smooth operation, and low noise.
Product Parameters
Product Model | HH44X-16Q |
Valve Body Material | Ductile Iron |
Nominal Pressure | ≤1.6Mpa |
Applicable Media | Water and so on |
Applicable Temperature | ≤80°C |
Product Size Reference

Nominal Diameter | L | D | D1 | D2 | n-φ |
DN40 | 290 | 145 | 110 | 105 | 4-18 |
DN50 | 290 | 165 | 125 | 122 | 4-18 |
DN65 | 290 | 185 | 145 | 138 | 4-18 |
DN80 | 310 | 200 | 160 | 158 | 8-18 |
DN100 | 350 | 220 | 180 | 188 | 8-18 |
DN125 | 350 | 250 | 210 | 212 | 8-18 |
DN150 | 480 | 285 | 240 | 268 | 8-23 |
DN200 | 500 | 340 | 295 | 320 | 12-23 |
DN250 | 600 | 405 | 355 | 378 | 12-25 |
DN300 | 700 | 460 | 410 | 428 | 12-25 |
DN350 | 800 | 520 | 470 | 490 | 16-26 |
DN400 | 900 | 580 | 525 | 550 | 16-30 |

















