1. bi-directional double four layer seal
The large diameter valve adopts double double double four layers seal. The sealing system of each side of the valve is on the spherical surface of the different sealing material. It can ensure the sealing of the valve more.
2. valve structure
The valve bonnet is made of two forgings, which is more reliable and effective for valves to withstand stress from pipes.
3. replaceable shaft seal system
The central shaft sealing system can be replaced after being damaged, and it can be replaced without removing the pipe pressure, so that its service life can be guaranteed.
4. seal material
All imported materials have higher stability and longer service life.
5. blowdown and pressure hole
In the large caliber valve, there is a blowdown and pressure hole, one is to detect the valve more intuitively in the process of pressing and testing, and the two is to discharge the impurities inside the valve during the maintenance inspection of the pipe.
6. fire protection structure of the middle axis
A fire resistant structure is designed in the central shaft system to prevent the valve from leaking outside the valve after receiving the fire.