Aimed at reducing leakage and limiting energy loss in industrial processes, US-based industrial technology company Emerson Electric Co has introduced a new cryogenic top-entry control valve for low-temperature applications.

According to Emerson, the Fisher IC2 cryogenic top-entry control valve is intended for use in cold box applications in air separation units, hydrogen liquefaction and liquefied natural gas production.

Cold boxes are insulated enclosures that house cryogenic equipment such as heat exchangers, distillation columns, piping and valves, and operate under extremely low temperatures.

Emerson reports that the IC2 control valve is designed to function reliably in these environments, with an operating capability of as low as -269 °C.

The valve experts explain that cryogenic conditions present operational challenges, including product and energy losses from emissions, which can affect profitability, increase maintenance requirements and raise regulatory concerns.

To address these issues, the IC2 control valve incorporates specific cryogenic design features, including a narrow extension diameter and a fluid baffle. These components work together to minimise heat conduction and reduce the energy required to maintain process fluid temperatures.

Emerson also reports that the valve is equipped with an enhanced ENVIRO-SEAL packing system and bellows, which limit leakage to a maximum of 100 parts per million by volume. This performance level meets or exceeds standards set by the US Environmental Protection Agency.

Durability is also supported through the use of hardened trim materials, enhanced packing and metal-to-metal seating. These features are intended to support longer service life under demanding operating conditions.

Emerson says that maintenance considerations are addressed through a top-entry design that enables access to internal components. Additional features include a single packing nut, a modular stem assembly, independently replaceable bellows and a replaceable valve plug and seat ring. A dedicated tool is supplied to assist with seat ring removal.

The company concludes that the IC2 control valve is rated for the CL600 pressure class and is available in line sizes ranging from 1 inch to 4 inches, with further size options expected to be introduced.