Several years ago, Valve magazine published an interesting article titled “Ancient Roman Valves.” Isolation valves were used to control water flow through the aqueduct systems they engineered.
The use of valves to control the flow of water in these pipeline systems was also Empire wide. This universal use of valves and piping required a level of standardization that is familiar to modern engineers.
Today, isolation valves are used across most manufacturing and production industries to start and stop the flow of gas, liquids, slurries, or powders. I mention this in reference to a detailed brochure of Emerson’s isolation valve product portfolio. This portfolio includes:
- Triple offset valves
- C-ball valves
- Knife gate valves
- Butterfly valves
- Process ball valves
- Lined valves for corrosion resistance
- Check valves
- Angle slurry & isolation valves
These valves are designed for sealing tightness, reliable operation, minimal maintenance, and a lower total cost of ownership.
Vanessa triple offset valves, used in industries such as oil & gas, LNG, gas treatment, chemical & petrochemical, power, district heating (HVAC), desalination & water, are an alternative solution to traditional process valves, providing premium performance, long service life, and minimum maintenance in extreme operating conditions.
AEV double eccentric C-ball valves, used in cryogenic process isolation, rocket engine testing, critical service, and polymer applications, are similar in principle to a conventional ball valve, but with a half-ball that makes a “C” shape. This C-shaped ball rotates on two planes of motion with energy from the stem to close and seal against a fixed seat.
Clarkson knife gate valves are used for light to heavy slurry service in the mining and mineral processing, power, pulp and paper, wastewater, and chemical industries. These valves are known for their reliability, longer service life, and lower total cost of ownership.
Keystone butterfly valves are used from general-purpose through to heavy-duty and high-performance models. This includes resilient seated valves for long service life and tight shut-off; high-performance valves capable of 538°C / 1000°F temperatures and pressures up to PN 50 (Class 300); double-flanged valves in sizes up to DN 3000 / NPS 120; and lined valves suitable for highly corrosive liquids, gases, and slurries.
KTM process ball valves offer an extensive range of full- and reduced-bore models and serve a broad spectrum of applications across the downstream oil and gas, petrochemical, chemical, pharmaceutical, and allied process industries. They are used in sequencing; high temperature, high frequency, high operating speed, thermal cycling, mechanical cycling, clean fluids, dirty fluids, high viscosity, scaling fluids, corrosive and erosive waste treatment, sludge, saturated steam, and superheated steam applications.
Neotecha PTFE, TFM, and PFA-lined valves are designed for highly corrosive media. The molding technique of applying PFA over a metal core, achieving mechanical strength from the core and chemical resistance from the encapsulation, has given Neotecha valves a worldwide reputation for reliability in the most severe corrosive applications.
Keystone check valves are used for reliable reverse-flow prevention in the upstream oil and gas, power, and petrochemical sectors. Typical applications include backflow prevention in pump or multi-pump systems, high-slam risk systems with flow deceleration up to 25 m/sec2, combined low line velocity and low-pressure tightness, vacuum breaker for storage tank protection, high capacity/low pressure drop to ensure economical use, and are not suitable for pulsating applications.
Lunkenheimer angle slurry & isolation valves are designed and engineered specifically for the mining and process industries and other applications where built-up scale or settled slurries need to be cleared to allow flow. These include Alumina-bauxite slurries, digestion slurries, flash-vessel vapor return, green and spent liquors, washer underflow/overflow, tertiary and secondary thickeners, press-filter isolation, mudline disposal, precipitation, filtrate underflow, and hydrate slurry storage.
Check out the brochure and visit the Isolation Valves section on Emerson.com for more information on these reliable valve solutions that provide safe shut-off and isolation for industrial processes.
