In the latest addition to its suite of high-performance valve technology, the Type 3598 cryogenic valve by Samson promises trouble-free operation in the most testing environments. Areas of application include air separation units (ASUs), storage and transportation of liquified gas, marine applications and much more.

The Type 3598 cryogenic valve has been developed for use at extremely low (cryogenic) temperatures while simultaneously withstanding high pressures and large pressure drops. In processes such as the transportation or storage of liquified natural gas (LNG), low temperatures and often high pressures must be maintained. Under such conditions, specially designed valves must be employed to not only deliver their primary objective (control) but to also ensure system performance is not compromised, such as energy from the outside heating up the process fluid/gas.

Source: Samson Group

Samson’s Type 3598 cryogenic valve delivers its primary function under the most demanding operating conditions while simultaneously maintaining system performance through enhanced temperature distribution within the valve body and interface. Samson has optimized its design by utilizing high-quality materials for the valve body and trim, engineered valve function that easily deals with cavitation and flashing, and advanced temperature distribution via the use of a cryogenic extension bonnet and circulation inhibitor.

Samson claims the advanced design of the Type 3598 cryogenic valve will result in lower cost of operation and quicker maintenance. While the initial cost of the valve will be higher than conventional valves with screw-on insulation, this will be offset by lower actuator thrust requiring smaller actuator sizes thanks to the standard pressure balancing mechanism. Access from the top of the valve (after removal of the actuator) allows maintenance to be carried out without the need for removal. The single-piece valve body and large diameter of the extension bonnet means the valve is easy to access thus saving time and lowering risk to maintenance staff.

The Type 3598 cryogenic valve can function at temperatures as low as -196° C (-325° F), has a Class 900 pressure rating and is available in sizes up to NPS 8 (200 mm nominal diameter) making it one of the few cryogenic valves on the market available in larger sizes. An optional cover plate is also available for situations where further insulation between the cold box and the atmosphere is required.