Cryogenic Globe Valve

Since the opening or closing stroke of the valve stem of the low-temperature stop valve is relatively short and has a very reliable cutting function, and because the change of the valve seat opening is proportional to the stroke of the valve disc, it is very suitable for regulating flow. Therefore, this type of valve is very suitable for use as a cut-off or regulating as well as throttling.

• Common faults and solutions during the use of cryogenic globe valves

① Valve sealing surface is damaged

The causes of damage to the valve sealing surface are:

Before debugging the equipment, the pipelines were not blown off, leaving oxide scale and impurities after welding in the pipelines.

The preventive method is to completely blow out the pipeline before commissioning and add filters in front of important components.

②Media internal leakage

The reasons for internal leakage of media include: damage to the sealing surface and inclusion of impurities.

Solution: Repair the sealing surface and clean impurities to prevent internal leakage.

③Media leakage

• The reasons for media leakage are:

1. Frequent opening and closing of the low-temperature globe valve causes wear and tear on the sealing packing.

2. The valve shrinks when exposed to cold at low temperatures.

Solution: Tighten the packing compression nut or replace the packing.

Globe Valves

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