DH77X type butt-clamp butterfly check valve consists of valve body, valve flap, valve stem and spring and other parts, using butt-clamp connection. Due to the short closing stroke of the valve flap and spring loading, the water hammer phenomenon can be significantly reduced. The check valve is mainly applied to urban, industrial and high-rise building water supply and drainage pipeline network. Because of its structure length is shorter than the general check valve, it is most suitable for places with installation space limitation. Butterfly check valve is used for pure pipeline and industry, environmental protection, water treatment, high-rise building water supply and drainage pipeline, to prevent the medium from flowing in the reverse direction.
Product Features
- Compact size, lightweight, and compact structure for easy maintenance.
- The valve plate adopts the dyadic design, which can close quickly by itself under the elastic torque of the spring.
- Due to the speed closure effect, the medium can be prevented from backflow.
- The valve body structure has small length dimension and good rigidity.
- Safe and convenient, suitable for both horizontal and vertical installation.
Product Parameters
Product Model | DH77X-16Q |
Valve Body Material | Ductile Iron |
Valve Plate Material | Ductile Cast Iron/304 Stainless Steel |
Nominal Pressure | ≤1.6Mpa |
Applicable Media | Water and so on |
Applicable Temperature | ≤80°C |
Product Size Reference

Nominal Diameter | L | D | D1 |
DN40 | 43 | 107 | 65 |
DN50 | 43 | 107 | 65 |
DN65 | 46 | 127 | 80 |
DN80 | 64 | 142 | 94 |
DN100 | 64 | 162 | 117 |
DN125 | 70 | 192 | 145 |
DN150 | 76 | 218 | 170 |
DN200 | 89 | 273 | 224 |
DN250 | 114 | 328 | 265 |
DN300 | 114 | 378 | 310 |
DN350 | 127 | 438 | 360 |
DN400 | 140 | 489 | 410 |
DN450 | 152 | 539 | 450 |
DN500 | 152 | 594 | 505 |
DN600 | 178 | 690 | 624 |
DN700 | 229 | 800 | 720 |

















