- Manually (with a handle or a gear);
- With an actuator (electric, pneumatic, pneumohydraulic or electrohydraulic);
- Underground (as per GOST R 56001, it is allowed to have a stem extension in accordance with Customer’s requirements),
Anti blow‐out stem
Allows safe replacing of a seal with closed trim and pressure applied in the operating gas pipeline.
A valve stem gland has at least two sealing elements
Seal lubricant input
The valve is designed with an option to prevent tightness loss by having forced input of seal lubricant to seat and stem sealing.
To increase fire resistance, all polymer seals of valves are duplicated with TEG seals that help maintaining the valve tightness during long-term thermal impact (for emergency cases).