Description
Hoyme inline damper body with Belimo TFB24 on/off spring return actuator: factory-assembled, single SKU, ready to install. The product for projects where the mechanical engineer specifies Belimo, where damper sizes extend beyond 14", or where 24 Vac/dc supply flexibility is required. Sizes 6"–20" in even-inch increments.
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Belimo TFB24: widely used on/off spring return actuator in commercial HVAC. Factory-mounted to Hoyme damper body; no field mounting, no compatibility questions, one SKU
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24 Vac or 24 Vdc: either polarity on DC. Practical advantage on BAS systems where the control output is DC rather than AC
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6"–20" even-inch sizes: covers the size range where the standard Hoyme quarter-turn drive is not rated; same spring return fail-safe behavior
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TFB24 field-replaceable: stocked through Belimo distributors; actuator replaces without disturbing the damper body or duct connections
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End switch and heat bypass (-H) available on all sizes: factory-installed; no relay on TFB24 motor code
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CSA certified to 12": for 14"–20", confirm AHJ acceptance before ordering on code-required applications
Confirm PO vs. PC before ordering, and confirm the -H bypass is not on a fresh air application. Action is factory-set. The -H heat bypass is permanent and cannot be disabled: do not specify -H on fresh air intake, make-up air, or ventilation applications. The bypass will allow continuous outdoor air infiltration when the damper is commanded closed.
| If you need… | Product | Actuator |
|---|---|---|
| On/off spring return, 2-position gate, 24 Vac/dc | HAC-40 | Belimo TFB24: this product |
| On/off spring return, 100–240 Vac line voltage | HAC-44 | Belimo TFB120 |
| Modulating 2–10 VDC proportional control | HAC-43 | Belimo TFB24-SR-T |
| 3-wire floating point DDC open/stop/close | HAC-34 | Belimo CMB24-3-T |
| Fire and smoke actuator (not a listed damper) | HAC-90 | Belimo FSLF24 US |
Actuator
Belimo TFB24: factory-mounted
Sizes
6"–20" even inches
Supply Voltage
24 Vac or 24 Vdc
Action
PO or PC
CSA Status
Certified to 12": confirm AHJ for 14"–20"
Relay
Not available on TFB24
Interlocking with the furnace fan? Use the ADP-0241-05A with an OPO or OPC variant; it opens the damper and starts the furnace fan together. Use the end switch variant (SPO or SPC) only with a TPX proving adaptor or a BAS that needs position feedback. The TFB24 does not include a relay: if a relay output is needed in the control circuit, use a separate relay adaptor. For modulating control see HAC-43 (TFB24-SR-T).
2-year electrical · 10-year mechanical warranty
Hoyme damper body: Made in Canada · Belimo TFB24 field-replaceable through Belimo distributors
Product image is representative only. Actual product may differ in appearance depending on size, configuration, and options selected at order.
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