Air Duct Elbow Radius

Sheet metal connectors inc.

Air duct elbow radius.

Double wall fittings are manufactured on our state of the art fabrication equipment. 4 in 90 deg elbow dryer duct aluminum elbows speedi products elbows 4 to 6 duct connector 6 hood vent pipe. Sheet metal connectors inc. Minor or dynamic losses in duct systems are pressure losses caused by.

Sections for a total. 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. Each box of metal duct contains five 5 ft. Manufactures double wall fittings in most sizes and configurations.

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. 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. All ductwork comes standard with stiffening beads.

Use greenseam snap pipe duct and fittings from grainger to help with your commercial and residential hvac applications. Restrictions or obstructions in the air stream in outlet fans dampers filters and coils. Change in air direction from elbows offsets and takeoffs. Smc tdc slip drive and raw sheet metal connectors inc.

1 psi equals 27 7 inches of water gauge. Say reynolds number as 4500. 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. Ordinary heating ventilating and air conditioning duct systems read air pressures at 0 4 psi or less often much less.

Smc manufactures coil line ductwork in 4 5 6 lengths. The elbow is pre crimped on one end raw on the other and is available in several standard ductwork sizes. Duct system is pressurized by three pressures. Therefore the pressure loss is 0 2149.

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. Engineered with a leed qualifying zero voc gasket this ductwork can eliminate the need for additional sealing along the longitudinal seams and transverse joint.