Flow Control
1250AD6073AFAVB
Brooks Instrument Sho-Rate 2.5–25 SCFH Air Flowmeter
About this part
Brooks Instrument 1250AD6073AFAVB is a Sho-Rate Model 1250A variable-area flowmeter configured for direct indication of air from 2.5 to 25 SCFH. Its documented configuration includes a 65 mm scale, D6073 metering tube with a 1/4-inch stainless-steel float, aluminum 1/8-inch FNPT end blocks, a brass standard inlet valve, and a Buna valve O-ring. The integral valve provides manual flow adjustment; the instrument remains a mechanical indicating flowmeter rather than an automatic flow controller
Configurations vary. Verify the exact unit before choosing a replacement.
Key Facts
Specifications
| Manufacturer | Brooks Instrument |
| Series and base model | Sho-Rate 1250A |
| Measurement principle | Variable area, glass-tube flow indication |
| Calibrated medium | Air |
| Direct-reading range | 2.5–25 SCFH |
| Reference conditions | 70°F (21.1°C) and 14.7 psia (1 bar absolute) |
| Tube number | D6073 |
| Scale length | 65 mm |
| Float | 1/4-inch stainless-steel spherical float (ST) |
| Accuracy | ±5% of full scale at reference conditions for the listed gas |
| Repeatability | 0.25% of full scale |
| End blocks and connections | Aluminum wetted end blocks with 1/8-27 FNPT non-rotating connections |
| Valve | Standard inlet valve |
| Valve material | Brass, as specified for configurations with aluminum end blocks |
| Valve O-ring | Buna |
| Metering tube | Borosilicate glass |
| Maximum pressure | 200 psig (13.8 bar) |
| Measurement and adjustment | Mechanical flow indication with integral manual inlet-valve adjustment |
What Does 1250AD6073AFAVB Mean?
The complete identifier separates into the seven fields defined by the current Brooks ordering table.
| Segment | Field | Interpretation |
|---|---|---|
| 1250A | Base model | Sho-Rate flowmeter with a 65 mm scale |
| D6073 | Tube number | D6073 tube; the air capacity table specifies a 1/4-inch stainless-steel float and a 2.5–25 SCFH direct-reading range |
| A | Gas or liquid | Air |
| F | Unit of measure | SCFH |
| A | Wetted end-block material | Aluminum with 1/8-inch FNPT connections |
| V | Valve designation | Standard inlet valve; the aluminum end-block selection makes the valve material brass |
| B | Valve O-ring material | Buna, the documented selection for aluminum configurations |
Operating-Limit Reconciliation
Brooks publishes two different upper-temperature statements in the applicable family documentation. The lower safety-caution value is the conservative operating boundary.
Installation and Reading Notes
The applicable installation manual provides the following operating guidance.
- Read the indicated flow at the center of the spherical float.
- Mount the meter on a panel or leveling tripod base and minimize vibration and internal flow variation.
- Purge trapped air or gas slowly and leak-test the meter before bringing it to operating pressure.
- Protect the meter against sudden pressure and flow surges.
- The integral valve is intended for fine adjustment. Use a separate shutoff valve when tight shutoff is required.
- Hold the fitting hex while installing mating 1/8-27 MNPT fittings; the manual specifies a maximum installation torque of 60 in-lb.
Documentation Downloads
Local PDF copiesPart Photos
3 imagesHistorical archive images for identification, labels, connectors, and condition reference, not current inventory.
Historical Listings & Prices
Historical listing data, not a current offerThe typical recorded price range is $188.42 to $188.42. Based on 1 archived listing record; not a current offer, appraisal, or confirmed sale price.
View archived listing titles
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