A-2
Appendix A Model 224 Differential Pressure Unit
The BUA with 3/4-inch bellows accommodates diff erential 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 diff erential 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 specifi cations are presented in Table A.1, page A-3.
Figure A.1—Bellows Unit Assembly (BUA)
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