I realize this an old thread but wanted to make you guys aware of a few things.
Easy trick to cut down the noise of a Haskel pump. Rather than enclose them all you need to do is to remove the muffler and pipe the exhaust out of the room. This will take the majority of the noise and direct it to area out of the lab.
The new Haskel offering of the AGD-1.5-710 has 60 CU IN of displacement per stroke versus the EXT’s that only have 20 CU IN of displacement per stroke. My customers are getting 1.5+ LBS of recovery / minute as it is basically 3 EXT’s in 1 while using the same 25 SCFM of air to drive the pump so need for bigger compressors.
Added bonus as it is also quieter due to a different spool valve design. Only draw back is this unit is not rated to pull a vacuum. For existing EXT owners looking to upgrade this is not an issue as they just run both pumps in parallel with the ability to isolate each one. They use the AGD-1.5-710 for the majority of the run and use the EXT420 in dual stage mode to finish the run. Since January 19’ we have only seen less than 5 need to rebuilt so they are very reliable.
No electricity in the lab, fast recovery, and less downtime its a win win win!!