- No moving parts in high level control
- 4-inch internal valve mates NTT standard flange-removable from outside. 6-inch valve furnished with steel welding ring (mounting does not mate with NTT flange). Stainless steel ring optional
- Soft closure feature for surge control
- Loading and off-loading through one valve
- Fail closed system
- Lightweight design
- Air operation for off-loading
- Modular pilot construction for ease of maintenance.