Wednesday, February 27, 2019

Crane FKX 9000 Butterfly Valve: Triple Offset Explained


The Crane®FKX 9000 Triple Offset valve design is recommended for industrial applications where large bore valves handle hot steam or isolate parts of their plants and have high/low temperatures that prevent the use of rubber lining elements.

Here's an explanation of "Triple Offset":

Offset One
This offset applies to the center line of the disc/seat sealing surfaces that provides an uninterrupted sealing surface.

Offset Two
This offset refers to the location of the shaft with respect to the center line of the bore, which enables a calming action of the disc to minimize rubbing and wear between the seat and seal.

Offset Three
This offset is the axis of the seat cone angle that is offset from the center line of the valve bore to eliminate rubbing of the seat/seal contact surfaces during operation and to preserve sealing integrity over the cycle life of the valve.

For more information, contact Mountain State Engineering and Controls by calling (303) 232-4100 or visit https://mnteng.com.

Wednesday, February 20, 2019

Heat Exchanger Basics

Shell and Tube Heat Exchanger
Figure 1 - Shell and Tube Heat Exchanger

Shell and Tube Heat Exchanger
Shell and Tube Heat Exchanger
Disassembled
Heat exchangers transfer thermal energy from one fluid to another. In manufacturing facilities, steam is a common source of heat for many reasons, some of which are discussed in the Introduction. There is a wide range of heat exchanger designs that use steam, largely due to the wide range of products that are heated with steam.

Many process and product considerations must be incorporated into the selection of a heat exchanger. Some basic heat exchanger types are discussed below, including:
  • Tubular
  • Plate and frame 
  • Jacketed
  • Coil

Tubular Heat Exchanger

Shell and Tube Heat Exchanger
Shell and Tube Heat Exchanger
Internal View
Tubular heat exchangers are tube bundles that are surrounded by the heated or heating medium. This type of heat exchanger includes finned tube and shell and tube designs as shown in Figure 1 above. Finned tube heat exchangers are often used to heat air for drying and space heating applications. Shell and tube heat exchangers are often used for liquid heating and evaporation. Since the tube side of shell and tube heat exchangers can be designed to withstand high pressures, sometimes exceeding 1500 PSIG, heat exchangers of this type are often used in high-temperature and high-pressure applications.

Plate and Frame Heat Exchanger 

Plate and Frame Heat Exchanger
Plate and Frame Heat Exchanger
(in clean/sanitary application)
In plate and frame heat exchangers, the two heat exchange fluids are separated by plates. The plates are corrugated, or ridged, as shown in Figure 11, to increase the surface area available for heat transfer. Plate and frame heat exchangers are often used in low-viscosity applications, where the risk of clogging is less severe. The plate ends are typically sealed by covers with gaskets covers that can be removed to allow disassembly and cleaning. This heat exchanger type is used when temperatures and pressures are moderately low, typically below 300°F and 370 psi. Plate and frame heat exchangers also have a common design variation that has the plates welded or brazed together. This allows higher temperature service but eliminates the possibility of mechanical cleaning.

For more information about heat exchangers, contact Mountain States Engineering and Controls.

Web: https://mnteng.com
Phone: 303-232-4100

Thursday, January 31, 2019

VSI Controls GLS Globe Control Valves

GLS SeriesThe VSI Controls GLS Series is recognized as a high-performance control valve in the oil, gas, power, and process industries, the while boasting easy, quick, and economical maintenance. In contrast from other control valves operated by spring-diaphragm actuators, the GLS Series is operated by double acting spring-cylinder actuator that takes advantage of its high pneumatic stiffness, which in turn ensures an excellent and accurate positioning in throttling as well as fast and reliable response to changes in the control signal.

Get more information about the VSI Controls GLS Control Valve Here

Tuesday, January 22, 2019

CCS DualSnap Pressure and Temperature Controls


CCS manufactures pressure and temperatures switches used in many industrial and aerospace applications. CCS’ designs utilize proven, rugged “Dual-Snap®” disc spring and advanced sensing technologies to provide customers superior solutions for pressure and temperature applications.

Contact Mountain States Engineering & Controls for more information.
303-232-4100

Wednesday, December 12, 2018

Happy Holidays from Mountain States Engineering and Controls

From all of us at Mountain States Engineering and Controls, we wish our customers, partners and vendors a safe and happy holiday season and a wonderful 2019!


Friday, December 7, 2018

Mitigating Legionnaires Risk with Anti-Microbial Cooling Towers

Anti-Microbial Cooling Towers
Anti-Microbial Cooling Tower
(Delta Cooling Towers, Inc.)
We've all read about deadly outbreaks of Legionnaires Disease cropping up in cities across the United States. Hundreds of people have been severely sickened and dozens killed by deadly bacteria that proliferates in water systems like the cooling towers used in conjunction with large HVAC systems.

Causes:
  • Poor water flow and areas where water is stagnant, common to cooling tower designs with a large flat bottom basin, which will have stagnant water in the corners.
  • pH between 5.0 and 8.5, water temperatures between 68°F and 122°
  • Sediment that promote growth of commensal microflora
  • Microorganisms including algae, flavobacteria, and Pseudomonas, which supply essential nutrients for Legionella growth or harbor the organism
Prevention:
  • Chemical Water Treatment: Oxidizing Biocides are recommended as the best mode of control. Warning: this type of biocide can be aggressive towards metal surfaces; specifically metal cooling towers.
  • System Design & Engineering: No stagnant water, sloped basin, and/or basin sweeper system.
  • Maintenance – Competent consistent water treatment and monitoring most important.
  • According to the Center for Disease Control and Prevention, about 5,000 cases of Legionnaire’s disease are now reported each year in the United States.
Cooling towers have a long history of effectively expelling heat from the water used in many commercial and industrial applications. However, a recent study from the Center for Disease Control and Prevention (CDC) found that an overwhelming majority of the cooling towers they tested contained Legionella DNA. Legionella bacteria can flourish in cooling towers and spread to humans when expelled water vapor or mist containing the bacteria is inhaled.

Research in Legionella prevention led to conclusions that cooling towers with rounded basins and compounded with an antimicrobial resin significantly mitigated risk of harmful bacteria.  Rounded towers improve circulation which inhibits growth, and the anti-microbial chemicals embedded into the tower’s HDPE material also helps to prevent the growth.

Resulting from the research, the Anti-Microbial Cooling Tower, was developed by Delta Cooling Towers, Inc. and is now available to greatly reduce the growth of Legionnaires bacteria,  By incorporating an anti-microbial HDPE resin in the cooling tower shell, tower fill and drift eliminator, tests have confirmed efficacy against the growth and spread of Legionella.

For more information on Anti-Microbial Cooling Towers, visit this link.

To learn more about Anti-Microbial Cooling Towers right now, call Mountain States Engineering and Controls at 303-232-4100.