The URB/URD Series Discharge Silencer is a heavy-duty, all welded unit constructed of carbon steel sheet and plate. It provides pulse control and silencing for subcritical pitch line velocity (PLV) applications. Sizes 4" and larger are equipped with flanged connections drilled to 125/150 lb ANSI specifications. Smaller sizes are standard with male threaded pipe nipples. Units sized 4" and 5" are available in either flanged or male pipe threads. Exterior surfaces receive a shop coat of rust inhibitive primer and may be finish painted in the field if desired.

Size	Capacity (Inlet CFM 14.7 PSIA at 70°F)
	Inlet Silencer	Discharge Silencer
		4 PSIG	6 PSIG	8 PSIG	10 PSIG	15 PSIG
1	30	35	40	40	40	45
1.5	70	80	85	90	95	105
2	120	140	150	160	165	185
2.5	190	220	235	245	255	285
3	270	320	335	355	370	415
3.5	370	430	455	480	505	560
4	480	560	600	630	660	735
5	750	880	935	985	1030	1150
6	1080	1260	1340	1410	1480	1650
8	1920	2250	2390	2510	2630	2940
Est. Temp	70°F	115°F	140°F	165°F	190°F	240°F

Size	D	L	N	H
URB-1	4.5	21	2	17
URB-1.5	6.5	24	2	20
URB-2	8	33	3	27
URB-2.5	10	34	3	28
URB-3	10	46	3	40
URB-3.5	12	52	3	46
URB-4	14	53	3	47
URB-5	16	65	3	59
URB-6	18	72	3	66
URD-8	22	97	3.5	90

Note: Sizes 1"–6" are URB Series; sizes 8"–30" are URD Series. Both series are fundamentally the same in design and the performance characteristics are identical.

Please Note: The product picture may differ slightly from the actual product.