If you work in the HVAC and refrigeration business, you know that you have to be able to trust the people who provide you with the hot water coils that you need. We are proud to say that Rahn Industries is the manufacturer that people in the HVAC and commercial refrigeration business have turned to when they need a hot water coils. They come to us because they know we use the best materials, manufacture the best products and that our products are built to last.
We employ rigorous standards on all of the hot water coils that we manufacture. We make sure that our hot water coils are designed to withstand a 400 psi maximum operating pressure and a maximum fluid temperature of 300°F. Higher limits are available depending on coil construction and/or materials used.
Rahn Industries uses only the best and most durable materials on all of our coils, assuring you a quality product. Call us today and tell us what your hot water coil needs are and we can help you get the best in the industry!
Hot Water Coil Specifications
1.Design Pressures & Temperatures
Coils are designed to withstand 250 psi maximum operating pressures and a maximum fluid temperature of 300° F for standard duty copper tube coils. Higher limits are available depending on coil construction and/or materials used.
Coils are constructed with plate fin, die-formed aluminum or copper with self spacing collars. Standard aluminum material thickness shall be .0075 +/- 5% and standard copper material thickness shall be .006 +/- 5% unless otherwise specified.
All tubing and return bends are manufactured with seamless copper conforming to ASTM B75 and ASTM B251. Tubes are mechanically expanded to form an interference fit with fin collars.
All manifolds are constructed from seamless copper conforming to ASTM B75 and ASTM B251. Each return manifold has a factory installed air vent located at the highest point on the face of the manifold. All core tubes evenly protrude into the inside diameter of the manifold no more than a 1/8”.
All brazed joints utilize high temperature filler metals. Manifold connections are brazed with filler metal containing at least 5% silver.
Casing and tube sheets are manufactured from 16 gauge galvanized steel, meeting ASTMA527 standards. Coils up to ten feet will have a pitched casing toward the condensate connection, a minimum of 1/8” per foot. Coils over ten feet in length should be pitched at time of installation to ensure proper condensate removal.
Coils are pressurized with a minimum of 350 psi air pressure and completely submerged in water.