Thursday, January 25, 2018

Krombach Brand Valves for Rugged Service Conditions

metal seated butterfly valve with actuator
Metal seated butterfly valves for aggressive process
applications are a hallmark of the Krombach brand.
Image courtesy Crane CPE
The Krombach branded valves, part of the Crane CPE product offering, target challenging applications in industrial settings that benefit from the use of valves specially designed for severe service. The brand also includes a standard product offering of valves and specialties for a broad range of common industrial applications.

The Krombach line includes:

  • Butterfly Valves - High performance, resilient seated, double-eccentric, triple offset and special purpose butterfly valves.
  • Ball Valves - Process one-piece, two-piece and three-piece, metal seated, soft seated and compact ball valves.
  • Globe and Angle Valves - Bronze, cast iron, cast steel and stainless steel globe and angle valves.
  • Gate Valves - Bronze, cast iron, cast steel and stainless steel gate valves.
  • Check Valves - Ball, dual-plate, foot, full body swing, steam stop, tilting disc, wafer style swing, nozzle-type and pressure seal check valves.
  • Vacuum Relief Valves - Available with flanged or threaded connections.
  • Aerating and Deaerating Valves - Essential for trouble-free operation of pipeline systems handling liquids.
  • Float Valves - Single seated and double seated versions for a variety of applications.
  • Throttle Valves - Available with flange connection, wafer- or weld-in type.
  • Bottom Drain Valves - Available manually operated or with a diaphragm actuator.

Below is a cutsheet providing an overview of the company's standard product categories. Whatever your fluid control application, share your challenges with the valve specialists at MSEC. Leverage your own process knowledge and experience with their product application expertise to develop effective valve and automation solutions.


Thursday, January 18, 2018

Corrosion Resistant Cooling Towers

corrosion resistant HDPE cooling tower
One variant of corrosion resistant cooling tower
Image courtesy Delta Cooling Towers
Cooling towers rank highly as included components of heat rejection systems. Building and facility HVAC and industrial process cooling commonly rely on cooling towers as the final phase of transferring heat from inside a system, such as a building, to the outdoor environment. With most relying on the evaporation of water as the means to efficiently move large amounts of heat, cooling towers contain large wetted surfaces in almost continuous contact with solutions of water and various chemicals used to maintain certain fluid conditions. The heat transfer solutions can be aggressive, and many towers are constructed using metal for the wetted parts and case of the unit. This has traditionally been an area of concern with cooling tower ownership, since the combined elements of water, treatment chemicals, and time take their inevitable toll on the equipment.

Avoiding the deterioration of metal clad cooling towers is construction utilizing high-density polyethylene (HDPE). HDPE is not impacted by water, treatment chemicals, or elements often present in the air, whether harsh chemical vapors emitted from nearby industrial plants or natural corrosives such as salt air.

Delta Cooling Towers, Inc., based in New Jersey, USA, manufactures HDPE cooling towers and possesses an extensive portfolio of completed successful applications utilizing HDPE construction features. Below is a short case study showing how one industrial user benefited from installing HDPE cooling towers.

Read the case study and get more information from an application specialist. See how incorporating HDPE cooling towers into your operation can reduce maintenance burden and lead to longer machinery life.

In any business venture or other organization, relying on doing things the way they have always been done can be detrimental to real progress and improvement. Incorporating change involves risk, but good planning and careful analysis will increase the probability of success.


Wednesday, January 10, 2018

Steam Trap For Heavily Contaminated Steam

cast iron float steam trap
The Float Trap series is available in carbon or stainless steel.
Image courtesy Spirax Sarco
Industrial process gear and equipment manufacturers are always tweaking designs, adding features, and creating new product variants in response to the challenges presented by the immeasurably broad range of application and operation scenarios for their products. Spirax Sarco is a globally recognized leader in the design and manufacture of steam system specialties, and has created a rugged steam trap to accommodate some tough challenges.

The company's FTC23 and FTS23 Float Trap products are ball float steam traps suitable for use with saturated and superheated steam. The units can be utilized on process equipment and for drainage of temperature controlled systems. These traps are specifically targeted at applications involving steam that may be carrying solids or incondensable gasses. Solids, if not purged from the system, can accumulate and foul the internal trap mechanism, leading to failure.

The company indicates that the main design feature is a self-cleaning float closing mechanism which maintains safe operation even in the presence of severe contamination. The positioning of the valve and seat also promote the discharge of the condensate, along with entrained contaminants. There is even a manual lever on the exterior of the trap that allows an operator to force the full opening of the valve, regardless of whether condensate is present. This operation facilitates fast removal of contaminants and maintains optimum performance.

The two models differ in their construction materials, with one having a carbon steel body, the other a stainless steel body. Internals are stainless steel on both units.

Share your challenges with the steam system specialists, leveraging your own knowledge and experience with their product application expertise.


Friday, January 5, 2018

Piston Isolation Valves For Steam and Condensate

carbon steel or stainless steel piston valve for steam or condensate
Simple and reliable piston isolation valve is well suited
for steam and condensate applications.
Image courtesy Spirax Sarco
Piston valves are serviceable and reliable valves that are well applied to isolation use in steam and condensate systems. Recently, Spirax Sarco, globally recognized manfacturer of steam system componentry, introduced their PV4 and PV6 lines of piston isolation valves targeted at steam and condensate applications.

The new valves are available with carbon steel or stainless steel bodies, with the internals of both being stainless steel. Screwed, socket weld and butt weld connections are available in 1/2" through 2" sizes. The operation is unidirectional, so installation must have the system flow according to the arrow on the body. The only other installation restriction is that the handwheel should be above the valve body.

Accommodated pressure and temperature ranges for the PV4 and PV6 will be suitable for a broad range of steam and condensate applications. Share your steam system challenges of all types with application specialists. Leverage your own knowledge and experience with their product application expertise to develop effective solutions.


Wednesday, December 27, 2017

Mountain States Engineering and Controls 2017 Wrap Up

oilfield equipment
Oil and gas production and processing are but a few of
the markets in which MSEC operates.
As 2017 becomes a part of history, everyone here at Mountain States Engineering and Controls sends a message of thanks to all the people and organizations that supported the company's success throughout this year. It is our hope that our success was mirrored by your success, as well.

During the year, some changes were made to our product offering to support the goal of delivering top quality brands and problem solving products with long term value to our customers. The newly added Sterlco brand of electric condensate and boiler feed pumps, steam traps, and direct acting temperature control valves complements our other steam system products.

With an emphasis on our own continuing education and product application training, we intend to increase our performance throughout all areas of our operation in the coming year. We look forward to continuing and expanding our current business relationships, as well as forging new opportunities.

Happy New Year to all.


Thursday, December 21, 2017

Capsule Steam Traps

cutaway view capsule steam trap
Capsule type steam trap, cutaway view
Image courtesy Tunstall Corporation
Steam traps are an important part of a closed steam system, directing condensate on a path back to the boiler for reuse and venting non-condensing gases from the system. Of the several different types of steam traps utilized commercially, the thermostatic steam trap is but one. Thermostatic traps are often applied when the application can benefit from a utilization of some of the heat remaining in the condensate. This trap design will hold the condensate in place until it cools sufficiently below the saturation temperature of the steam.

Capsules utilized in thermostatic steam traps contain the controlling elements of the device. The parts are somewhat subject to wear through their movement, but more so from the corrosive effects of system fluid, impurities, and mechanical shock from water hammer. Tunstall Corporation specializes in the manufacture of replacement capsules for thermostatic steam traps that provide better service and extended warranty duration. Their sealed units are fabricated of stainless steel and welded to seal out deterioration due to exposure to steam and condensate. Drop in replacement capsules are available for conceivably every trap manufactured in the previous few decades.

Share your steam system requirements and challenges with application specialists, leveraging your own knowledge and experience with their product application expertise to develop an effective solution.

Wednesday, December 13, 2017

Process Tuning

sliding gate industrial process control valve
This sliding gate industrial control valve could operate
under the command of a tuned process control loop.
Image courtesy Schubert & Salzer
Controller tuning is a process whereby a controlling device in a process has a response characterized to the needs of maintaining a process condition within certain limits under a range of varying disturbances to the process. Established guidelines for automation standards exist so that every process control operator can experience the same standard of safety and maintenance in a way universally understandable. The International Society of Automation (ISA) promotes different tuning standards based on the particulars of the control process, such as temperature or liquid level control.

Liquid-level control loops are usually considered non-self-regulating processes. They require external moderation to remain uniform and for errors to either be mitigated or corrected. General rules which exist for adjusting and tuning loops for self-regulating process, such as temperature control, are often inapplicable to liquid level loops, making liquid level control loops somewhat unique in their tuning.

In order to address the counter intuitive nature of these process loops, start with a model of the loop’s ideal functionality. This can serve as a reference. After doing so, incorporate potential variables into the ideal loop and evaluate their impact on the model process. Checking equipment, then modeling the process dynamics, allows engineers to observe the manner in which the process reacts in relation to the target or goal performance.

Whereas other loops can be tuned via trial and error, liquid-level control loops should not be due to the nature of their reactions to controller input being different than that of other processes. Instead, the parameters for the control loop need to be carefully engineered, rather than specifically tuned. Liquid level loops are integrating processes, rather than self-regulating. A self-regulating process will, with no disturbances to the variables, reach an equilibrium at which the process value remains constant. Consider a non-self-regulating liquid level control loop where the fill valve is open. No equilibrium point will be achieved, just overflow. The distinction between the two types is key to understanding why tuning liquid level loops is a different process than self-regulating control loops.

Temperature and thermal loops, depending upon the process dynamics, present varying degrees of tuning challenge. PID temperature controllers are employed to adjust the heat input to a process to affect a change in, or maintenance of, a process temperature setpoint. Without proper tuning, the controller output and the resulting process performance can oscillate or be slow to respond, with a negative impact on process performance or yield. Many PID controllers have an auto-tune feature, some of which are more effective than others. The best results achievable by PID controller tuning are accomplished by defining a setpoint prior to the auto-tune process and starting the tuning procedure from a stable process condition. Tuning the controller in the same process environment in which it will operate can also be very helpful.

Share your process measurement and control challenges with experienced application specialists, combining your own knowledge and experience with their product application expertise to develop effective solutions.