Over the past several years, enactment of Clean Air regulations has resulted in an increasing demand for incineration systems. Incineration systems destroy volatile organic compounds (VOCs) that are produced during the manufacturing process so that they are removed from the exhausting airflow to the atmosphere. These incineration systems, (for example, thermal oxidizers) must function efficiently in order to meet the guidelines of Clean Air regulations. An integral feature of these incinerators is the diverter dampers that are used to direct the process airflow to and from the incinerators.
This is where Ruskin's new PDR20 Poppet Damper steps in. In order to attain the highest VOC destruction efficiency, certain incinerator systems will have fast-acting diverter dampers incorporated into their design. These dampers must open and close almost instantaneously while providing a tight shutoff.
The Ruskin PDR20:
Is ideal for applications that require rapid cycling times & tight shutoff.
Can be ...
Read the rest of entry »
Ruskin is proud to announce the latest addition to its line of air monitoring dampers. The CDRAMS model is a true round air monitoring, low leak control damper that is easily installed in round spiral ductwork."The industry has been demanding a round air measuring damper with low leakage," said Michael Wiltfong, head of Ruskin's Control Dampers group. "And Ruskin met the challenge."The CDRAMS joins the [model:iaq50]IAQ50[/model] and [model:ams50]AMS50[/model] as Ruskin's latest air measuring damper. These dampers enable buildings to better meet ASHRAE Standard 62, which defines the requirements for indoor air quality. The CDRAMS also features:[list][*]Specially designed blade-to-frame polyethylene foam seals that fully encompass the edge of the damper.[*]Extruded aluminum airfoil sensing tubes that sample the air pressure across the full diameter of the duct.[*]Ease of operation with optional manual, pneumatic, or electric actuators.[/list]Ruskin's CDRAMS provides the solution to providing indoor air quality ...
Read the rest of entry »
Fire and Smoke TestingIf dampers are expected to control smoke and air, it should be specified in the project's design by indicating the leakage amount allowed to pass through. Historically, Underwriters Laboratories 555S or Air Movement and Control Association laboratory methods are used to determine test procedures and leakage requirements.
Fan isolation or equipment room dampers generally require the National Fire Protection Agency exposure test. In addition, TVCDs could require fire ratings because they might be located inside equipment rooms with combustible items.
Generally, fire ratings are to be tested in accordance with British Standard 476-pt 20 fire tests for building structures and material. Dampers rated by British standards have shorter blade lengths and are built differently than NFPA qualifiers. British standard requirements limit gap or see-through during fire tests, caused by blade sag, frame deformation and blade rotation.
he longer the blades on TVCDs, the more mass and weight nee ...
Read the rest of entry »
ActuationActuation is extremely important to damper reliability and performance. As requirements for elevated temperatures increase, manufacturers must search for different and creative ways to power machines. Depending on how they're tested, dampers can be actuated in various fashions, but most require a fail-position device.
Dampers switch to an open or closed fail-safe position when losing its electrical power or pneumatic air supply. This is inherent with fire rated apparatus, but may not be applicable with modulating or smoke control TVCDs.
Additionally, dampers can be fitted with many ancillary devices such as pressure switches, smoke detectors and position indicators to isolate and solve system problems.
Single actuators may power multiple sections of each damper or there may be only one per section. In either case, engineers must remember if a single actuator powering multiple sections fails, all section control is lost. This could be detrimental if the failed section supplies or exhausts a h ...
Read the rest of entry »
A Question of Pressure
Finally, considering pressure transversals in mass transit rail systems is extremely important when applying TVCDs. Dampers in tunnels can be subjected to rapid pressure spikes created from high-speed trains passing in front of them. Depending on train speed, tunnel tolerances and damper location, pressures as high as 24-in, of water gage may be created as trains approach and travel away.
Over time, this aggressive movement has adverse effects on damper construction if this harsh impact wasn't considered during designing. Manufacturers should possess this data showing actual testing for these conditions and modifications should be made when needed.
Ventilation dampers play important roles in today's modern tunnel ventilation and emergency systems. When properly selected and applied, they can provide trouble-free service for many years. Today's TVCDs aren't just airflow devices but an integral part of the tunnel ventilation and emergency system function.
When the Mahaska County Hospital in Oskaloosa, Iowa, needed to renovate their building, there were several challenges that had to be overcome before they would be up to code. To meet those challenges, they turned to Ruskin.
Read the rest of entry »
...and Ruskin had the solution.The existing shafts were not fire rated and none of the penetrations were protected with fire or combination fire/smoke dampers. The plans called for new fire rated wall construction and combination fire/smoke dampers for penetrations in all shafts.
Many of the applications had three ducts penetrating the shafts above the ceiling, one hot supply and one cold supply and one return air.
Because the shafts were only 36 inches wide, it was impossible to use standard style combination smoke dampers with side mounted actuators and accessories. They would be too wide to properly fit in the space.
KJWW Engineering Consultants turned to its local Ruskin Representative, Hart-Hammer, Inc., of Des Moines, Iowa, and contractor Cunningham, Inc., Oskaloosa, Iowa for help. Working together, Cunningham, Hart-Hammer and KJWW Engineering Consultants found that Ruskin's [model:fsd60v]FSD60V[/model] combination fire/smoke damper offered the performance and flexibility necessary to get the ...
Read the rest of entry »
Tunnel ventilation systems are classified in several different ways. Since today's automotive and mass transit tunnels differ in requirements, choosing the right damper is critical.
Read the rest of entry »
Ruskin Manufacturing, Kansas City, MO, introduces the new and improved [model:ibd10](D)IBD10[/model] fire damper. The (D)IBD10 is the industries most versatile and easy to install fire damper! The (D)IBD10 saves valuable installation time which equals money in your pocket! Some of the money saving benefits are:[list]
[*]Complete [b]one trip[/b] installation from one side of steel stud walls
[*]Installation [b]before or after[/b] the sheet rock (less coordination headaches)
[*]Complete installation from one side of masonry walls with easy to use holding straps
[*]No additional retaining angles required.
[*]12", 14" or 16" money saving integral sleeve.
[*]Ships directly to the job site ready to install.[/list]
Ask your [link:http://www.ruskin.com/RepLocator/USACanada.aspx]Ruskin representative[/link] about the (D)IBD10. It's so easy to install you'll never use another damper.
Ruskin builds a complete line of commercial and industrial control dampers, fire/smoke dampers, louvers and grilles for th ...
Read the rest of entry »
Ruskin Manufacturing, Kansas City, MO, announces the [model:13474]CDTI-50[/model] Thermally Isolated Aluminum Control Damper. This damper is specifically engineered and manufactured to provide the lowest thermal conductivity available. Each airfoil blade is injected with high-density polyurethane foam providing thermal isolation. After the injection process, each blade edge is then cut producing the thermal break needed to effectively isolate one skin from the other reducing thermal transfer.
The CDTI-50 has been tested by an independent lab to ASTM C976-90 & ASTM C1199-97 standards for Thermal Performance of Building Assemblies and Thermal Transmission. The CDTI-50 is leakage controlled to as little as 4cfm per square foot with only 40 inch lbs. of holding torque.
Ruskin builds a complete line of commercial and industrial control dampers, fire/smoke dampers, louvers and grilles for the HVAC and architectural market.