UNUSED Regenerative Blower by Ametek-Rotron, Model CP909RDRLA, Part #081577, 4" inlet & outlet. Requires 10-15 HP Motor. Vacuum and suction limits dependent on application. Mfg: Rotron Tech & Industrial Products, Saugerties, NY.
Link to OEM Documents - http://www.enviroequipment.com/remediation_new/documents/en909.pdf