A-2
Appendix A
Model 580A Differential Pressure Switch
The BUA with 3/4-inch bellows accommodates differential pressures up to
400 psi. The range springs are grouped around the outside of the bellows and
must be of a material that is compatible with the liquid being measured.
The BUA with 5/8-inch bellows accommodates differential pressure ranges
up to 1000 psi. Like the BUA with 3/4-inch bellows, the range springs are
grouped outside the bellows.
The Model 224 DPU general specifications are presented in
Table A.1, page A-3
.
Figure A.1—Bellows Unit Assembly (BUA)
