Ohio Medical Amvex Dial and Thorpe Style Flowmeters
Ohio Medical · Model Amvex Dial and Thorpe Style Flowmeters
Thorpe Style Features: • Available in Oxygen, Medical Air, Heliox and CO2 and N2O • Easy to service • No strip D shape knob • Includes an inlet filter and inlet extension • Back pressure compensated so flow accuracy is not affected by restrictions Dial Style Features: • Available in Oxygen in 25, 15, 8 and 4 LPM • Available in Medical Air in 25 and 15 LPM • Smallest and lightest in the industry • Color coded labeling for specific gas • Encased in an anodized aluminum housing • Easy to read flow window
Key tips
- ·Don't extend filter/tubing replacement intervals to save cost - this is an infection-control issue, not just a performance one.
- ·Flow accuracy drift is often the earliest sign of a failing sensor, well before an outright alarm.
Typical Failure Modes
Failure patterns typical of this equipment class - general BMET reference, not verified against this exact unit's own service history unless flagged. Severity is a category-level estimate.
Flow calibration drift
HighSymptoms: Delivered flow rate reads off from a known reference.
Root cause: Internal orifice or float-tube wear.
Valve / regulator seal leak
HighSymptoms: Won't hold set pressure, audible gas leak.
Root cause: Diaphragm or seal degradation.
Gauge / dial fault
MediumSymptoms: Stuck, misreading, or broken gauge needle/dial.
Root cause: Mechanical gauge movement wear.
Fitting / connector leak
MediumSymptoms: Gas leak at a hose or cylinder connection.
Root cause: Worn O-ring or damaged threads.
Serviceable Parts & Consumables
The parts a BMET typically services on this class of equipment. Service class and relative cost are general engineering estimates for the category, not figures from this unit's documentation. Part numbers appear only when pulled from this unit's own service manual. Always confirm intervals and pricing against the manufacturer.
Regulator / valve seal kit
Class Periodic replacementRel. cost $$R&R Fairly easy
Flow tube / orifice assembly
Class Periodic replacementRel. cost $$R&R Fairly easy
Pressure gauge
Class Major service partRel. cost $R&R Easy
Fitting / connector O-rings
Consumable - replace on any detected leak.
Class Periodic replacementRel. cost $R&R Easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Regulator / valve seal kit | Periodic replacement | $$ | Fairly easy |
| Flow tube / orifice assembly | Periodic replacement | $$ | Fairly easy |
| Pressure gauge | Major service part | $ | Easy |
| Fitting / connector O-rings Consumable - replace on any detected leak. | Periodic replacement | $ | Easy |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
PM Checklist
Preventive-maintenance tasks typical of this equipment class. Perform to the manufacturer's procedure and your facility's policy - this is general reference, not a schedule for this specific unit.
- ·Filter and tubing replacement
- ·Flow accuracy check
- ·Annual full PM
Troubleshooting Approach
A structured starting point derived from the failure modes above. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Flow calibration drift
- Confirm the presentation - typically delivered flow rate reads off from a known reference.
- Check the most likely cause first: internal orifice or float-tube wear.
- Inspect the affected subsystem against the manufacturer's inspection checklist.
- If the fault is confirmed and not a field adjustment, service or replace the regulator / valve seal kit per the manufacturer's service documentation.
- Return the device to service only after the manufacturer's functional and applicable electrical-safety checks pass.
- Record the findings, any parts used, and the verification results in the maintenance history.
Symptom: Valve / regulator seal leak
- Confirm the presentation - typically won't hold set pressure, audible gas leak.
- Check the most likely cause first: diaphragm or seal degradation.
- Inspect the affected subsystem against the manufacturer's inspection checklist.
- If the fault is confirmed and not a field adjustment, service or replace the flow tube / orifice assembly per the manufacturer's service documentation.
- Return the device to service only after the manufacturer's functional and applicable electrical-safety checks pass.
- Record the findings, any parts used, and the verification results in the maintenance history.
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Respiratory Therapy department
- Patient floors
- Emergency Department
- Home care (portable units)
Documents & Manuals
No documents available for this device yet.
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