HH47X Buffered Butterfly Check Valve
manufacturer: Shanghai MeiYan Yi Pump & Valve Co., Ltd.
Eml: sales@1bengfa.com
Tel: +86 (21) 5640 2009
Mob: +86 138 1691 3072（WeChat Same Account）
product drawing
HH47X Buffered Butterfly Check Valve
Overview
The HH47X buffer butterfly check valve is a key component in industrial fluid transport systems to prevent backflow of media. Its core is to achieve smooth opening and closing of the valve disc through a built-in hydraulic or elastic buffer mechanism, which can reduce the closing impact speed by 30%-50%, suppressing water hammer, reducing noise and sealing loss at the source. The sealing material is matched according to the characteristics of the media. When fully open, the flow resistance coefficient is as low as 0.5-1.2, resulting in significant energy savings.This valve is widely used in water supply and drainage, heating, chemical and industrial circulating water systems, and is especially suitable for scenarios where backflow prevention is required, such as the outlet end of a water pump. The selection should be determined based on the medium parameters, operating pressure and flow rate, and installation environment. The seal and lubrication should be checked regularly. Before maintenance, the medium must be cut off and the pressure released to ensure safety.
Features
1. Compact Structure: Utilizing a butterfly design, the valve body is small in size, lightweight, and occupies little space, facilitating installation and maintenance, and is especially suitable for piping systems with limited space.
2. Low Fluid Resistance: The streamlined design of the butterfly plate minimizes turbulence and cavitation during media flow, effectively reducing fluid resistance, minimizing energy loss, and improving system efficiency.
3. Slow-closing function: Equipped with a buffer mechanism (such as a hydraulic cylinder or spring), the valve can close slowly, effectively reducing the impact of water hammer on pipelines and equipment and protecting system safety.
4.Reliable sealing performance: Typically employs a double or triple eccentric sealing structure, resulting in low friction between the sealing surfaces. The sealing surfaces quickly disengage when opening and tightly seal when closing, effectively preventing media leakage and making it suitable for pipeline systems carrying various media.
5.Flexible Installation: Can be installed horizontally, vertically, or at an angle to adapt to different pipeline layout requirements. No special adjustments to the installation direction are required, facilitating engineering design and construction.
6. Smooth Operation: The butterfly plate rotates flexibly, and the opening and closing process is smooth, without jamming, vibration, or noise, which is conducive to stable system operation and reduces
Dimensions & constructral diagram
HH47X Buffered Butterfly Check Valve constructral diagram
Material of main parts
| NO. | Name | Material |
|---|---|---|
| 1 | Seal Ring | NBR, CR |
| 2 | Disc | Casting Steel |
| 3 | Body | Casting Steel |
Performance Specification
| Performance Specification | ||
|---|---|---|
| Nominal Pressure | 1.0/1.6/2.5 | MPa |
| Shell Test Pressure | 1.5/2.4/3.75 | |
| Seal Test Pressure | 1.1/1.76/2.75 | |
| Suitable Temperature | ≤80 | ℃ |
Specification and dimensions
| Parameter | DN200 | DN250 | DN300 | DN350 | DN400 | DN500 | DN600 | DN700 | DN800 | DN900 | DN1000 | DN1200 | DN1400 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L (mm) | 230 | 250 | 270 | 290 | 310 | 350 | 390 | 430 | 470 | 510 | 550 | 630 | 710 |
| H (mm) | 550 | 630 | 690 | 780 | 860 | 980 | 1070 | 1220 | 1320 | 1430 | 1550 | 1800 | 1980 |
| B1 (mm) | 540 | 600 | 650 | 710 | 770 | 900 | 1090 | 1200 | 1320 | 1420 | 1550 | 1780 | 2000 |
