Compact actuators for LNG cryogenic valves
The Rotork Schischek ExMax actuator is successfully used in LNG cryogenic applications.
LNG is transported to site in specially designed tankers which also store the liquid gas at the cryogenic temperature of -162º Celsius. A separate trailer, housing the re-gasification system, normally sits between the tanker and the generator. The main component of the re-gasification system is the vaporiser, which converts the LNG from liquid to gas and feeds it to the point of use. This system, together with auxiliary processes including pressure building in the tanker to improve flow, utilises scores of valves which are typically small, cryogenic and tightly arranged within a compact installation.
Those valves that are automated therefore require a particularly compact and fast acting actuator, capable of providing powerful rotary or linear drive, for isolating and modulating duties in a hazardous environment. This is a scenario that is proving to be ideal for the Rotork Schischek range of electric actuators, due to their small size, flexible power supply range, failsafe capabilities and explosionproof approvals. An increasing number of ExMax (quarter-turn) and ExRun (linear) actuators are being supplied to OEMs and fabricators in these areas and in other process applications handling LNG in cryogenic environments.
The Schischek self-adaptive universal power supply has a range of 24 to 230V, ac or dc. Explosionproof certification for Schischek actuators encompasses UL, CSA, ATEX, IECEx, GOST/RTN, INMETRO and KOSHA international standards, with safety integrity levels up to SIL3 also available with failsafe products.
Valve stroke times are suitable for fast operation and selectable at speeds between one and 120 seconds, depending on actuator model. All models are fitted as standard with internal heaters enabling cryogenic operation at ambient temperatures down to -40°C Celsius.
Schischek
Tel: 01245 256007
www.schischek.co.uk
Published: 6th March 2014
Rachel Wormald, Managing Director at YPS Valves Ltd and Elizabeth Waterman, ...
Are you looking for industry-leading, brand independent valve and actuator ...
As can be seen from the photograph, clearly the resident birds at Bartlett ...
Howco Group has unveiled its latest £1million investment, with the ...
In 2024, Allvalves is poised for an exciting year of growth and expansion, ...
GMM Pfaudler Engineered Plastics & Gaskets are delighted to bring the ...
In the ever-evolving valve industry, GMM Pfaudler stands out for its ...
SAMSON Controls Ltd – part of the SAMSON group - a renowned leader in ...