We installed the SV-300 vent silencer on our main compressor discharge line about five weeks ago. The unit handles 150 psi steam venting cycles that run three to four times per shift. Before the installation, the peak noise level at the property line was 87 dB during a vent event. After the first month of operation, we measured 52 dB at the same point. That is a drop of 35 dB, which brings us well under the local industrial noise ordinance of 65 dB daytime limit.
The silencer body itself is heavy — about 340 kg — and required a small crane for positioning. The flange connection matched our existing piping without any adapter work. We did have to add a support bracket because the weight pulled slightly on the pipe elbow. That was a minor field modification that took half a day. The rock wool packing inside the silencer shows no signs of settling or moisture absorption so far, even with the steam condensate that forms during warm-up cycles.
What I appreciate most is the documentation that came with the unit. The attenuation curve graph matched our field measurements within 2 dB across the 125 Hz to 4 kHz range. That kind of predictability makes it easier to plan future installations without over-engineering the margin. We are already looking at a second unit for the backup compressor line.
One thing to note: the outer casing gets hot during operation. We added a warning sign and a small guard rail around the silencer area. That is standard practice for any high-temperature equipment, but worth mentioning if your team is not used to vent silencers.