Monday, August 22, 2016

Power Source for Hydraulic Valves and Dampers

self contained hydraulic power unit for valve and damper actuation
Self contained hydraulic power unit
A range of fluid processing and other flow control operations employ hydraulically actuated valves or dampers. Hydraulic actuators use a pressurized incompressible liquid as the motive force to drive the actuator mechanism. They are generally capable of operating large loads at higher speeds than electric actuators, and a smaller size than similarly capable pneumatic actuators. They are not subject to limited run times, power loss, or air line freezing.

A power unit is required to provide adequate hydraulic fluid and pressure for each application. A single unit can service more than one actuator or damper.

Rotork, a globally recognized manufacturer of valve actuators, also provides self contained hydraulic power units specifically tailored to applications involving valve and damper actuators. With fluid capacities up to 7,500 liters (2,000 gallons) and operating pressures up to 345 bar (5,000 psi), the skid mounted units are suitable for a wide range of applications. Each system is customized to accommodate the requirements of the intended application.

Share your fluid control and valve actuation challenges with product specialists, combining your process and project knowledge with their product application expertise for effective solutions.

Wednesday, August 17, 2016

Lined Ball Valves Provide Corrosion Protection Without Exotic Alloys

cutaway view lined ball valve for industrial fluid process control
Cutaway view of lined ball valve
Flowserve Atomac
Ball valves are a staple of fluid process control, delivering a host of design and performance attributes making them the valve of choice for many applications. When the process involves corrosive fluids, steps must be taken to accommodate the aggressive nature of the media, so that valve trim and body are not prematurely degraded by the intended use.

A good solution for valves exposed to aggressive media is an interior lining of fluoropolymer or other material resistant to the corrosive effect of the fluid. Employing a lining protects the valve metal parts from contact with the fluid, allowing the use of less expensive metals in the construction of valve body and other valve components. In extreme cases, ball valves can be delivered with fluid paths fabricated of ceramic material for superior corrosion and erosion resistance.

Flowserve Atomac is a globally recognized leader in the manufacture of lined ball valves, as well as lined strainers, sight glasses, sampling valves, and check valves. Lined ball valves are available in essentially all the configurations expected of more conventional ball valves, including diverter and control service versions.

An overview of the Atomac line is included below. Share your corrosive fluid processing challenges with a product specialist, combining your process expertise with their product application knowledge to deliver effective solutions.

Wednesday, August 10, 2016

Smart Boiler Level Indication Delivers Operational Benefits

LED display of boiler water level on smart level measurement and control system
Smart level control delivers operational benefits
Maintaining proper water level in a boiler is necessary for safe and efficient operation. Historically, boiler level measurement and control were accomplished with mechanical means. Today, sensor technology, electronics, and software bring improved accuracy and a host of other useful features to the water level control system.

Clark Reliance, a globally recognized leader in level indication and control, separation and filtration for steam systems, has developed a smart boiler level indication system to enhance boiler operation. The video included below provides an illustrative overview of the system, how it works and the benefits it will bring to a new or retrofit installation.

Share your combustion and steam challenges with experienced specialists, and combine your site and project knowledge with their expertise to deliver an effective solution.

Thursday, August 4, 2016

Specialized Valve Trim Controls Flow and Pressure Drop

Fluid process control operations can entail fluid velocities, pressures, or other characteristics that can prove challenging on a number of levels, not the least of which is flow control. Valve manufacturers have developed a wide array of specialized designs and configurations to provide flow control while mitigating or eliminating some undesirable effects associated with restricting fluid flow.

Inherent in the restriction of flow is the possibility of creating or increasing some generally undesirable conditions in the pipe.
  • Velocity
  • Noise
  • Vibration
  • Erosion
  • Cavitation
Depending upon the process conditions, any of these elements could have a decidedly negative impact upon process performance, workplace environment, or system longevity. The video provides an example of how one manufacturer of severe service ball valves, Mogas, modifies their design to address these potentially negative aspects while providing accurate flow control. By adding elements to the outlet side of a ball valve, an entirely different operating profile is achieved. Watch the video for all the details, as it is well produced and illustrated.

Share your fluid process control challenges with experienced application specialists. Combine your process expertise with their product application knowledge to produce effective solutions.

Friday, July 29, 2016

New Introductory Video From CTi Controltech

CTi Controltech has released a new welcome video illustrating the company's capabilities. CTi’s expertise includes burner management and combustion control, as well as other areas of process control in the refining, power (including renewable such as geothermal and solar), food, specialty chemicals, mining, and semi-conductor industries. The company's personnel resources include engineers, technicians, and sales/support staff. CTi Controltech is strategically based in San Ramon, CA.

Wednesday, July 20, 2016

High Efficiency Hydronic Boilers

hydronic boiler high efficiency
Series 3000C Hydronic Boiler
Courtesy Williams & Davis Boilers
Hydronic boilers are widely deployed in residential, commercial, and industrial settings as part of a central heating plant or process hot water system. In recent years, replacing steam boilers with hydronic units has been one way to boost efficiency and reduce operating costs. Hydronic boilers produce hot water, whereas steam boilers deliver vapor (steam) to the distribution system.

Hydronic boilers employing condensing boiler technology can achieve efficiency rates beyond 95% in some cases. The elevated efficiency results from making use of the sensible and latent heat from the combustion fuel. Additional savings are reaped from the lower operating temperature range of the entire system. Using temperature reset related to outdoor temperature, weekend and night setback operation, and operating at greater differential between supply and return temperatures can further add to the comparative savings of a condensing hydronic boiler system.
Cutaway view of hydronic boiler
Hydronic boiler with cover removed
Courtesy Williams & Davis Boilers

There are many considerations to be taken into account when selecting a hydronic boiler and associated equipment. Proper selection and coordination of the instrumentation and equipment is a key part of achieving the desired efficiency and energy savings. It is beneficial to consult with combustion experts when planning to install new equipment. Combining your facility or process knowledge with their expertise will produce the best outcomes.

Monday, July 11, 2016

Armored Liquid Level Gauges With Specialty Indicators

armored liquid level gages guages for process measurement and control
Armored liquid level gauges provide protection from
mechanical stress and impact
Courtesy Jerguson / Clark Reliance
Sight glass liquid level gauges are a mainstay of fluid processing operations that store raw materials, intermediate, or final product in tanks and other vessels. Having a direct visual indication of fluid level at the tank enhances safety and provides the all important data point about what is happening inside the tank.

These level gauges are installed on the exterior of the tank, exposed to whatever environmental or operational hazards existing or occurring at the location. Armored level gauges are appropriately named because of their construction. They are designed to resist impact and mechanical stress, as well as a range or environmental conditions.

There are generally two versions of armored level gauges, reflex and transparent. The names refer to way in which light is handled by the gauge to reveal the liquid level. One manufacturer of armored level gauges and other level instruments, Clark-Reliance, provides a good description of the two gauge types. Their brand of armored level gauges is Jerguson, and I provide their description here of the two types (source)

Jerguson® Reflex Level Gauges are ideal for clean total level indication applications for refining, petrochemical and general use applications. The reflex prisms are molded and polished to provide a crisp black-silver bi-color indication of the fluid level. As light passes into the reflex glass, if there is fluid present, the light continues through the glass and reflects off the back of the level gauge, providing a black color for fluid level regardless of the actual color properties of the process fluid. If fluid is not present, the light is reflected off the glass back towards the user, providing a shiny silver or mirror-like appearance to indicate vapor space.

Cross section of reflex level gauge 
Jerguson® Transparent Level Gauges are selected for interface level indication, dirty service or any application that requires the use of a shield to protect the glass from corrosion. A transparent gage is also known as a “thru-vision” gauge since the gauge is constructed with two pieces of flat polished glass assembled on opposite sides of the level gauge chamber. Since the user can see straight through the gauge, it is also easy to view the fluid properties, such as color, whereas this would not be possible with a reflex gauge. The use of an illuminator is always recommended on a transparent gauge.
transparent glass liquid level gauge cross section
Cross section of transparent level gauge
Selecting an armored level gauge is an exercise in preparing for known and unknown events that might disable your ability to directly read fluid level. Armored level gauges are employed extensively in chemical, petrochemical, and other industries where reliability under challenging conditions is essential. Wherever there are mechanical hazards, an armored level gauge may ultimately prove to be cheap insurance against downtime or delay.

Share your level measurement challenges with a product application specialist. Combine their product expertise with your process knowledge to produce an effective solution. Below is a data sheet for one of several series of Jerguson armored level gauges, so you can explore more detail. Contact the product application specialists for more information about larger sizes, higher vessel operating pressures, and optional configurations that will best suit your application.