Rising stem ball valves for isolation and switching in molecular-sieve systems. Review adsorption and regeneration conditions, cycle frequency and leakage acceptance when selecting the OB configuration.
Isolation service for gas-dehydration packages and associated piping. Fluid composition, differential pressure and operating temperature define the material and sealing requirements.
Valve selection for gas pretreatment upstream of liquefaction. Specify process and regeneration conditions; LNG pretreatment duty does not by itself establish cryogenic suitability.
Critical switching and isolation in gas-processing equipment. Actuation and control requirements are selected for the package sequence, operating frequency and required fail position.
The OB rising-stem ball valve platform uses non-rubbing seat engagement for frequent-cycling isolation. Selection focuses on the switching duty, sealing requirements and operating conditions rather than a general-purpose ball-valve rating alone.
Define line size, design pressure and temperature, medium composition, differential pressure at operation, cycle frequency and required seat leakage. Specify actuator type, stroke-time requirement, fail action, position indication and control interfaces. The quoted OB model establishes the available size, pressure class and material combination.
Material verification, shell-pressure testing, seat-leakage acceptance and operational checks are defined for the quoted configuration. Required test conditions and documentation should match the process package and project inspection plan.
Design standards, fire-safe qualification and fugitive-emissions requirements are confirmed separately when specified. Include the required valve drawing, material records, actuator documentation and inspection reports in the purchase scope.
Configuration selected for the switching duty
Provide the process conditions, operating cycles, shutoff requirement and actuator control specification to establish the suitable valve configuration.
