Cryogenic Ball Valve – Erreesse Srl Valves

Cryogenic Ball Valve: ball valves for temperature from -51° to -100°C (-59,8° to -148°F) should comply to customer specific requirements and shall be tested according to BS 6364 or equivalent standard. Soft seated construction with suitable stem extension and vapour space, with thermoplastic inserts like Devlon V, RPTFE, PEEK are still acceptable but PCTFE is mainly recommended; no elastomer is allowed in cryogenic service, non-metallic material should be limited to PTFE lip seals and graphite; carbon steel, low alloy and duplex steels should not be used below -51°C/-59,8°F. Austenitic stainless steel is suitable for this service and does not require any impact testing in this temperature range. Metal seated construction can be considered in case of combined service conditions.

When Natural Gas has to be separated into fractions or treated to protect equipment from contaminants (acids), sweetering and acid removal at -51° to -196°C (-59,8° to -320,8°F), are the final stage to do that, starting from liquefaction to sub-cooling stages, with pure or mixed refrigerants (methane, nitrogen) as cooling elements. Erreesse production program offers special valve solutions engineered to suit cryogenic processes with specific constructions and duly selected materials.

This application can exist in combination with other service conditions, including corrosive & dirty applications with toxic substances, flammable liquids (LNG, LPG or NGL condensate) or generic hydrocarbon gas in high pressure or high temperature applications.

-Design temperature from -51° to -100°C (-59,8° to -148°F)

Ball valves for this temperature range should comply to customer specific requirements and shall be tested according to BS 6364 or equivalent standard. Soft seated construction with suitable stem extension and vapour space, with thermoplastic inserts like Devlon V, RPTFE, PEEK are still acceptable but PCTFE is mainly recommended; no elastomer is allowed in cryogenic service, non-metallic material should be limited to PTFE lip seals and graphite; carbon steel, low alloy and duplex steels should not be used below -51°C/-59,8°F. Austenitic stainless steel is suitable for this service and does not require any impact testing in this temperature range. Metal seated construction can be considered in case of combined service conditions.

-Design temperature from -101° to -196°C (-149,8° to -320,8°F)

Ball valves for this temperature range should comply to customer specific requirements and shall be tested according to BS 6364 or equivalent standard. Soft seated construction with suitable stem extension and vapour space, with PCTFE thermoplastic inserts with no elastomers: non-metallic material should be limited to PTFE lip seals and graphite; carbon steel, low alloy and duplex steels are not allowed and should not be used. Austenitic stainless steel with impact testing at minimum design temperature is required and recommended at this temperature range. Metal seated construction can be considered in case of combined service conditions.