| Frick | FES/GEA | Grasso |
| Howe | Mycom | Sabroe |
| Sullair | Vilter | York |
| Bitzer |
| Guntner | B.A.C. | Colmac |
| Evapco | SGS |
| Alfa Laval | Chester Jensen | Chil-Con |
| Flat Plate | GEA | Gram |
| Kelvion | Mueller | Northfield |
| Turbo |
| Andover | Ashcroft | Honeywell |
| Johnson | Marsh | Mercoid |
| Versa | McDaniel |
| Aurora | Bell & Gossett | Buffalo |
| Cornell | Crane | Durco |
| Goulds | Nikkiso | Paco |
| Peerless | Teikoku | Grudfoss |
| Frick | H.A. Phillips | Joe White Tank |
| R.V.S. |
| ACR Systems | Calibration Technologies | Cool Air |
| Genesis International | Honeywell | Ideal Shield |
| Mine Safety Appliances |
| Armstrong | Cyrus Shank | Danfoss |
| Genesis International | H.A. Phillips | Hansen |
| Henry | Herl | R/S |
| Sarco | Sporlan |