An Aerodynamic Torque Study
Flow control research scientist, Asmaa Kassab, Ph.D., at MOGAS Industries, Inc. examines aerodynamic torque in fluid flows and its affect on actuator sizing, and investigates the options to reduce it.
Fossil Fuel
Modern fossil fuel plants are highly complex, custom-designed systems. Emerging boiler technologies and progressive system upgrades are increasing plant capacities and changing the operating landscape. These innovations include higher temperatures and pressures found in advanced super-critica...
Compressor Protection
ProcessCompressors are a crucial part of many processes where the media requires compression in order to move along the system. These compressors are set for particular conditions where any instability in the control valve will create a system trip. In the event of a trip, the control valve must open extremely fast to ensure that the gas is recycled around the compressor to avoid internal damage to the compressor. Anti-Surge / recycle control valves should always be designed t...
Gas to Flare / Depressurization
ProcessThe objective of a flare system is to burn waste gases that are either uneconomical to recover / retain—or released during planned or unplanned over-pressuring of plant equipment. Waste gases are released to the flare via flare headers and burned as they exit the flare stackOne of the major safety issues addressed with utilizing a dependable isolation valve is flashback protection. In this situation, absolute tight shut-off is required. However if de-pr...
Dryer Sequence (Mol Sieve)
ProcessMolecular sieve dehydration (MSD) is used to remove water from natural gas. There are multiple columns filled with desiccant and the gas feed is cycled through adsorption, regeneration and cooling vessels.Engineered SolutionsMOGAS isolation valves for LNG handle high and low temperatures, entrained particulates, thermal shock and high cycling with dependable shut-off over many years of service. Valve features include:<d...
Ammonia
These 10-inch ASME 900 Class ESD valves installed in an ammonia plant have a stroke time of under 3 seconds.Ammonia is a colorless gas that consists of nitrogen and hydrogen (NH3). Because of its low boiling point, as a liquid i...
IIoT and VOM measure the bigger picture to lower costs
A few years ago, only the number of accumulated strokes and days in service were recorded during valve inspections. Today operational data already available supports end users in actively managing their equipment assets.
Compressors
The chemical / petrochemical industries can put compressors through a variety of extreme conditions, from high pressures and temperatures to gases with aggressive and toxic components. Several different types of compressors are used to move the flow along while reducing the volume of the compressible fluid. This activity usually results in increasing temperature (release of energy) and pressure at the compressor discharge. Because of demanding specifications, strict safety requirements, su...