Installation Guidelines For Oxel Silencers

These recommendations are per ASTM E477 Standards and should be followed as a “guideline” to allow our silencers to perform to the E477 specifications as shown in our catalog

·         Elbows or aspect changes can be used in line with our silencers but if they are within 10 diameters upstream or down stream of the silencer face you must add one head loss to the pressure drop for each occurrence. Failure to observe this rule does not allow for “static regain”.

·         If elbows with straitening vanes are used within the 10-diameter rule add only 1/2 of a head loss per occurrence.

·         Transitions attached to our silencers must not exceed a 30° approach or departure angle. Transitions with more extreme angles will also add one head loss per occurrence. Transitions with less than 30° angles will add approximately 0.10” to the total system drop.

·         Silencers close coupled to Vane Axial fans will experience a higher-pressure drop than shown in the catalog and should be calculated as a transition and /or elbow. All silencers on the inlet side of a vane axial fan should have their spiral twist in the opposite direction to the blade rotation. On the exhaust side the silencers should have their spiral twist in the same direction of the blade rotation. Please specify at time of order.

·         Please use all provided connection points in your installation. Our silencers are structurally engineered to use all mounting holes provided. This will also insure a complete seal.