Air Duct Elbow Radius

1 psi equals 27 7 inches of water gauge.

Air duct elbow radius.

Each box of metal duct contains five 5 ft. This adjustable large radius elbow is manufactured from heavy duty galvanized steel as separate gores independently rotating sections allowing it to adjust to meet multiple angles ranging from 0 90 degrees. 10 6 duct locations 27 10 7 duct fittings and transitions 28 10 8 aspect ratio 32 10 9 standard duct sizes 32 11 0. 4 in 90 deg elbow dryer duct aluminum elbows speedi products elbows 4 to 6 duct connector 6 hood vent pipe.

Smc manufactures coil line ductwork in 4 5 6 lengths. Sheet metal connectors inc. Restrictions or obstructions in the air stream in outlet fans dampers filters and coils. Therefore the pressure loss is 0 2149.

Change in air direction from elbows offsets and takeoffs. A common duct pressure of 0 25 inches water column is equal to 0 25 divided by 27 7 in wc psi 0 009 psi. Double wall fittings are manufactured on our state of the art fabrication equipment. Get free shipping on qualified elbows or buy online pick up in store today in the heating venting cooling department.

Use greenseam snap pipe duct and fittings from grainger to help with your commercial and residential hvac applications. Rectangular duct and fittings are one part of our complete line of hvac products. Smc tdc slip drive and raw sheet metal connectors inc. Minor or dynamic losses in duct systems are pressure losses caused by.

Radius elbows take up more space than square back elbows with turning vanes as shown in duct design in the case of the nola new airport project the engineer had a preference for radius fittings and there was abundant space for which to work chose radius and elbow fittings on this large duct. All double wall fittings are fabricated with stiffening beads on duct sizes 19 wide and larger which have more than 10 square feet of unbraced panel. Ductwork design considerations 33 11 1 duct frictional resistance 33 11 2 duct equivalent length 35 11 3 ductwork system effect 35 11 4 installation issues 37 11 5 ductwork insulation 38 11 6 ductwork air leakage 39. All ductwork comes standard with stiffening beads.

H height of the duct w width of the duct r radius of the bend θ angle of the radius calculate the pressure loss of the duct fitting in a 600mm w x 200mm h duct with a radius of 600mm and a 90 bend angle. Say reynolds number as 4500. Ordinary heating ventilating and air conditioning duct systems read air pressures at 0 4 psi or less often much less. Sheet metal connectors inc.

Manufactures double wall fittings in most sizes and configurations. The elbow is pre crimped on one end raw on the other and is available in several standard ductwork sizes.