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In-house Cryogenic testing heightens efficiency

Cryogenic control valve requires special design, manufacturing process and special testing to withstand temperatures as low as -198 degree celcius in LNG plants.

 

 With greatly enhanced and improved testing capabilities, Emerson undoubtedly stands out as the leader in the industry having their own in-house cryogenic testing facilities. Nippon Fisher Sakura factory in Japan has the largest cryogenic test facility that can test globe valves up to 24” size. The other facility exits in Marshalltown , USA .

The Cryogenic valves are typically made of 316 grade stainless steels to withstand the low temperatures and use special extension bonnets to prevent freezing of stem packing. The plug seal is made up of UHMWPE (ultra high molecular weight polyethylene) and the seat design uses a unique soft metal construction.  The cage inner wall is specially machined to smoothness for a good sealing between the cage and seal ring to achieve tight shut-off requirements. Typically the seat leakage is less than 0.0005% of the rated valve capacity. Customers often require the seat leak test to be done at cryogenic temperatures of –198 deg C which the cryogenic test facility would use. The test valve is placed in the cryogenic pit and filled with liquid nitrogen to lower the temperature to the required value. 99.995% purity helium gas is used as the test medium.

 

The Emerson’s Cryogenic Test Procedure conforms to Shell International Petroleum Maatschppij B.V. (SIPM)’s requirements. Recent mega size LNG projects that Emerson clinched use the Sakura test facility to test all the cryogenic valves in the project.


For additional information, contact a local Emerson/Fisher sales office.

About Emerson Process Management

Emerson Process Management (www.emersonprocess.com), an Emerson business, is a leader in helping businesses automate their production, processing and distribution in the chemical, oil and gas, refining, pulp and paper, power, food and beverage, pharmaceutical and other industries. A division of Emerson, Fisher Controls International LLC (www.emersonprocess.com/fisher) is a global leader in the design, manufacture and application of final control systems. Fisher’s technology and innovation in process control play a key role in Emerson’s combining of superior products and technology with industry-specific engineering, consulting, project management and maintenance services. Emerson brands include: PlantWeb®; Fisher®; Micro Motion®; Rosemount®; DeltaVTM; Ovation®; and AMS

About Emerson

St. Louis-based Emerson (www.gotoemerson.com) is a global leader in bringing technology and engineering together to provide innovative solutions to customers in process control; electronics and telecommunications; industrial automation; heating, ventilating and air conditioning; and appliance and tools. Sales in fiscal 2002 were $13.8 billion.   

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Fisher, PlantWeb, Rosemount,  Micro Motion and DeltaV are marks of one of the Emerson Process Management family of companies.  Other marks are the property of their respective owners.

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Last Updated 8/1/2006


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