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Structure of the bottom valve
I. Valve Body: The backbone of the bottom valve
The valve body acts as the framework of the bottom valve, providing structural support for the entire mechanism. It’s typically made of cast iron or stainless steel. The internal flow channels are specially designed to minimize fluid resistance. A filter screen at the bottom of the valve body prevents impurities from entering the piping system. High-quality valve bodies have reinforced key areas to extend their service life.
II. Valve Disc: The “gatekeeper” of flow
The valve disc is the most active component of the bottom valve. Its function resembles that of a one-way gate:
- **Automatic opening and closing**: Operates without external power, relying on fluid pressure.
- **Buffering design**: Special construction reduces water hammer effects.
- **Materials**: Commonly used materials include copper alloys and stainless steel, which are resistant to corrosion.
III. Sealing System: Key to leak prevention
The sealing performance determines the efficiency of the bottom valve:
- **Soft seals**: Adapt well to irregular surfaces.
- **Metal hard seals**: Resistant to high temperatures and pressures.
- **Dual-sealing design**: Some advanced models use primary and secondary seals.
- **Self-sealing mechanism**: Better sealing effect with increased pressure.
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