Designed specifically to protect pipeline and shut-off valves in case of ingress of liquid phase of liquefied gas or anhydrous ammonia. They can be installed in pipes and hoses located between isolation valves or in the side sleeve of RegO isolation valves.
| Корпус (3125, 3121, 3129): | Латунь |
| Корпус (SS8001, SS8002, SS8021, SS8022): | Нержавеющая сталь |
| Пружина: | Нержавеющая сталь |
| Седельный диск: | Эластичная резина |