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 MessagePosté le: Jeu 8 Nov - 09:49 (2018) Répondre en citant  
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Tenderall Fan Co. has developed Low Profile Positive Pressure Ventilators that have been designed to fit in tight compartments ans small spaces without scarificing performance or features. These compact ventilation blowers are available is both gasoline driven conviguration and with 115230V single phase electric motor.

Positive Pressure Blower is a high volume fan use to pressurize a burning structure Ivan Rodriguez Jersey , in case of fire, in order to force the smoke out. Positive Pressure Blowers are portable, gasoline powered fans Texas Rangers Jersey , most of which utilize a 5.5 horsepower engine. The theory of positive pressure ventilation is based on the principal of even pressure distribution. Once a structure is pressurized, air and smoke can be forced out through any opening (similar to escaping from an inflated baloon).

Electric smoke ejectors (negative pressure ventilation) can be used for smoke removal but this has proven to be inferior to positive pressure ventilation.

What makes Positive Pressure Ventilation superior to negative pressure ?

* The risk of injury from the engaged structure is reduced while placing the fan in operation.
* Positive pressure ventilation is faster to set up and requires fewer personnel.
* The Positive Pressure Blower has a self contained power source, while electric fans require cords and adaptors.
* Smoke and heat is removed from all levels of the structure unlike negative pressure which can result in localized extraction.
* Quicker results. After initial knockdown Kevin Kiermaier Jersey , positive pressure ventilation can be initiated and will show immediate improvements in the interior conditions.
* It allows replacement of contaminants with vital cooler, cleaner air - especially in sealed or windowless buildings. It's also very effective in large and compartmentalized buildings, warehouses Chris Archer Jersey , schools, etc.
* Quick results allow firefighters faster entry due to lower heat levels and improved visibility.

The following criteria should be considered for effective use of Positive Ventilation:

- The cone of air must cover the intake opening. The fan must be placed the correct distance from the structure such as that the cone of air forms a seal around the opening.
- The size and location of the discharge is important. The discharge, if at all possible should be as high and far away from the intake as is practical. The discharge size should be between 34 to 12 times the intake. This may not always be possible as the fire may have already dictated discharge locations and sizes; but whenever there is a choice Wade Boggs Jersey , the above criteria should be used.
- It is important to control the ait flow between the intake and discharge. Positive pressure ventilation can move air long distances if proper control is maintained by opening and closing doors, windows, etc. It is important that firefighters understand not to open the structure too much: ie breaking windows Evan Longoria Jersey , etc.

The standard features of Tenderall Positive Pressure Ventilators include: fold down "T" handle; 8" pneumatic tires with full width axle; a "tilt and lock" device that allows the unit to be angled 20 degrees up or down with infinite positions in between; sturdy and light 1 inch wrap around frame. Explosion proof electric motors are available as drivers too.

The optimum ventilator placement distance on most 6'6" doors is about five to six feet away. If placement is too close, the seal won't be achieved. If placement is too far away, the cone of air will be hitting well outside the opening.

Additional information can be found at the Tenderall Fan company web site http:tenderallblowerindex.

Oleg Tchetchel
Process Air Systems Designer
Tenderall Fan Co.
http:tenderallventilatorindex
http:tenderallhvacindex
NAIROBI Tampa Bay Rays Jersey , Nov. 27 (Xinhua) -- South African head coach Paul Treu on Thursday conceded it was a challenge to put up a squad of 12 as he once again named an under strength Kenyan national rugby sevens side for the second leg of the HSBC World Sevens Series in Dubai.

Treu saw his charges crash out of the Main Cup quarters before going on to lose the Shield final in the tournament opener in Gold Coast in October after a crippling disagreement between senior players and Kenya Rugby Union (KRU) forced him to name a youth squad.

In an Olympics qualification year, the return of only two points that left them 14th out of 16 in the standings was greeted with dismay but the country's expectations to bounce back in Dubai next weekend and Pretoria a week later were dampened after commitments and injuries denied Treu his strongest possible side.

Local club Resolution Impala Saracens playmaker Samson Onsomu was handed his national team maiden call up in the team that is placed in a tough pool against Australia, England and the tasty clash against USA coached by Treu's predecessor Dexter Fowler Jersey , Mike Friday for the tournament that runs on Dec. 5 and 6.

"One player is getting his first call up, four players are playing their second tournament and Dennis Muhanji is only playing his third tournament since his last outing a few years ago. We are very excited and can't wait to see the guys play," the optimistic Treu declared.

"Some players like Collins Injera Matt Carpenter Jersey , Lavin Asego are not available due to other commitments. It was a bit of a challenge to put this team together but I think we have a good mix especially with some of the experienced players coming into the side, especially in the forwards," Treu said. "I think a player like Oscar Ayodi is going to add a lot of value to the team when it comes to our attacking abilities Yadier Molina Jersey ," the coach said as he outlined the hurdles facing his technical bench for Dubai with the third leg in Pretoria looming in the horizon a week after the Middle East stop.

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