Industrial Exhaust Stack Rain Cap

A stack exhaust velocity v e of about 2500 fpm prevents con densed moisture from draining down the stack and keeps rain from entering the stack.

Industrial exhaust stack rain cap. Stackheads used to exhaust through the roof. Where rain protection is desired high velocity discharge or concentric duct self draining stacks figure v 9 or equivalent may be used. The flapper damper on this type of cap may corrode allowing the flapper damper to stick open or closed. Chimney caps crown inspection procedures.

This article describes the inspection of and common defects or hazards found at covers terminations found at the top of chimneys and flues. Semi circular flaps butterfly damper cover the exhaust stack when fan is off. D exhaust stacks extending at least 7 feet above the roof and discharging vertically upward. We provide a checklist of chimney top or chimney rain cap defects for building owners contractors or inspectors.

Chimney rain cap inspection checklist. For intermittently operated systems protection from rain and snow should be provided by stack drains as shown in figure 2f to 2j rather than stack caps. Proper stack design stack velocity above 2600 fpm should prevent rain from entering stack while running rain v t approx 2000 fpm locate stacks on highest roof when possible don t use rain caps separate exhaust points from intakes. Chimney rain cap or top cover inspection defects repairs.

The built in gutter system is designed to prevent rain and snow from entering the stack. Carbon steel exhaust rain cap for 10 3 4 inch od exhaust stack 133 08. Caps for every stack. Weather caps are preventive maintenance at a minimal expense.

They are suitable for trucks farm and off road vehicles and equipment with vertical exhaust stack systems. Sky blasts storm collars rain caps. When fan is on flaps are forced out of the way to provide a clear path for air movement. Besides preventing damage these caps can also add a touch of class to your exhaust system.

Care must be taken to ensure continued proper operation. An exposed vertical exhaust stack can reduce engine performance. Made from galvanized spiral pipe for strength and durability. Prevent precipitation or foreign objects from entering the exhaust system with exhaust rain caps at grainger.

Whether you want a chrome rain cap to match your chrome stack or need to find an aluminized zinc rain cap for a straight stack we have an array of stock to meet your needs and fit your rig. Available in most sizes. Rain caps which divert the exhaust toward the roof are prohibited. These caps are designed to be rust resistant further adding to the benefits they provide.

Constructed as a duct that is attached to and exhaust into a second duct that is 1 larger in diameter the larger duct allows the air to exhaust while allowing rain water to run down its inside walls and drop outside of the inner duct. That deflect raindrops under the cap and into the stack changnon 1966.