HX-1 · hx
HHW heat exchanger Hx1
Bell & Gossett SU-145-4 steam-to-HHW — one of two, manually rotated.
Identity
- Cat. No.
- SU-145-4
- Fact. No.
- 125188
- Type
- Shell-and-tube, steam-in-shell / water-in-tubes (U-tube class)
- Geometry (nomenclature)
- ~14" shell, 5 ft tubes, 4-pass
- Year
- 1976
- Mfr
- Bell & Gossett (ITT Fluid Handling)
- WP shell
- 150 psi at 375°F
- WP tube
- 125 psi at 375°F
- MDMT shell / tube
- −20°F / −20°F R.T. (as stamped)
Operation
- Duty
- Plant steam → heating hot water
- Rotation
- Only one HX in service at a time (manual)
- Loop flow
- ≈ 225 GPM HHW (344A pump)
Capacity
- Published table
- Not on file (1976 units)
- Estimated class
- 1.3–1.8 MMBTU/h (±25%)
- Measured floor
- ≥ 1.7 MMBTU/h (2026-05-29 loop move)
BMS
- Points
- HXHx1HwSup/RetTemp; steam pressure HXStmPres
Notes
- Nameplate photo intake 2026-08-07 (batch 20260807-131711-e3303b3a).