: Use thread sealant paste rather than sealing tape, as tape can shred and clog the small internal passages of the instrument.
| Feature | Fisher 3582 | Fisher 3590 | |---------|-------------|-------------| | Air delivery | Standard | High-capacity (30 SCFM) | | Reversing | Requires cam change | Integral field reversible | | Travel range | Up to 4 inches | Up to 8 inches+ | | Typical actuator | 657 diaphragm | 1051/1052 large piston | fisher 3590 valve positioner manual