Flow Control
MR3A06SVVT
Key Instruments 4–60 SCFH Air Variable-Area Flowmeter
About this part
MR3A06SVVT is a Key Instruments 3000 Series direct-reading variable-area flowmeter calibrated for 4–60 SCFH of air. Its model code specifies 303 stainless-steel fittings, an integral inlet valve, and Viton fluoroelastomer seals. The meter has 1/8-inch FNPT inlet and outlet connections, ±4% full-scale accuracy, a 100 psig maximum pressure rating, and a 150°F (65°C) maximum temperature rating. Legacy material carries Brooks branding, while current manufacturer documentation identifies the product as Key Instruments
Configurations vary. Verify the exact unit before choosing a replacement.
No archived photo available
Key Facts
Specifications
| Manufacturer brand | Key Instruments |
| Product series | 3000 Series |
| Configured model | MR3A06SVVT |
| Measured medium and scale | Air, standard cubic feet per hour (SCFH) |
| Flow range | 4–60 SCFH of air |
| Accuracy | ±4% of full scale |
| Body and flow tube | High-impact molded polycarbonate |
| Configured fittings | 303 stainless steel (S) |
| Configured valve | Integral inlet control valve (V) |
| Configured seals | Viton fluoroelastomer with stainless-steel fittings (VT) |
| Process connections | 1/8-inch FNPT inlet and outlet |
| Maximum operating pressure | 100 psig (690 kPa; approximately 6.9 bar) |
| Maximum operating temperature | 150°F (65°C) |
| Operating orientation | Vertical |
| Intended mounting | Exposed panel or OEM instrument-panel mounting |
What Does MR3A06SVVT Mean?
The manufacturer ordering table divides the identifier into base-model, tube-code, fitting, valve, and seal segments.
| Segment | Field | Interpretation |
|---|---|---|
| MR | Base model | Molded polycarbonate body and flow tube |
| 3A06 | Tube code | 4–60 SCFH direct-reading air scale |
| S | Fittings | Stainless-steel fittings; the materials table identifies the stainless option as 303 stainless steel |
| V | Valve | Integral inlet control valve |
| VT | Seals | Viton fluoroelastomer seals used with stainless-steel fittings |
Installation and Safety Notes
Manufacturer instructions for the MR3000 Series apply to this configured meter.
- Mount the flowmeter vertically and minimize external vibration and internal flow variation.
- Use a maximum torque of 60 in-lb when installing 1/8-27 MNPT mating fittings, and 5 in-lb for the two 10-32 backplate mounting screws.
- Read a ball float at its center or a bullet float at its groove, according to the installed float.
- Slowly purge trapped air or gas during startup and avoid restrictive inlet or outlet connections that could impair accuracy.
- Use only non-hazardous, chemically compatible fluids within the stated pressure and temperature limits.
- Clean removable wetted components with clean water and a soft brush; do not use solvents or strong bases.
Brand and Document History
Key Instruments is the current manufacturer brand for the 3000 Series. Brooks Instrument identifies Key Instruments as a brand within the Brooks product family, and legacy MR3000 literature carries the Brooks mark. Brooks Instrument MR3A06SVVT is therefore a supported historical exact-part alias, not a separate model.
Documentation Downloads
Local PDF copiesPart Photos
0 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 $36.49 to $48.50. Based on 2 archived listing records; not a current offer, appraisal, or confirmed sale price.
View archived listing titles
- BROOKS INSTRUMENTS MR3A06SVVT VARIABLE FLOWMETER 01C11605121 100 PSIG MAX