This valve is arising disc type tank bottom valve with a structure where an external pressure type bellows is assembled.
The seal performance is superior to that of avalve with a general gland structure.
![cat07_c](https://www.thaipointglobal.co.th/wp-content/uploads/2020/02/cat07_c-1.jpg)
![ตาราง-04](https://www.thaipointglobal.co.th/wp-content/uploads/2020/02/ตาราง-04-1-scaled.jpg)
This valve is arising disc type tank bottom valve with a structure where an external pressure type bellows is assembled.
The seal performance is superior to that of avalve with a general gland structure.