Minimum Specific Gravity:Dependent on float size and rod length. See Dimensional Drawing.
Temperature Limits:Ambient Temperature: 212°F (100°C); Process Temperature: up to 500°F (260°C). See model chart.
Switch Type:Snap action or mercury. See Electrical Circuits and Ratings on model chart page.
Electrical Rating:See Electrical Circuits and Ratings on Model Chart page.
Wiring Connection:G, WT or E enclosure, terminal board. EV enclosure 18" (460 mm) leads.
Enclosures:G: painted steel and aluminum; WT: painted steel, aluminum and neoprene; E: aluminum; EV: aluminum and neoprene.
Wetted Parts:See Model Chart.
Approximate Weight:301G, WT with 4-1/2" SS float, 8 ft. rod, 5" 125# cast iron flange: approximately 35 lb (16 kg) with E, EV enclosure: 39 lb (17.7 kg).
| EXAMPLE | 301 | G | 4810 | AS | 15 | 1.0 | 2 | STW | 301-G-4810-AS-15-1.0-2-STW Top mount Float Type Level Control, NEMA 1 enclosure, single stage mercury switch, 3-1/2" x 6" 304SS float, 316SS stops, 304SS extension, 1.0 specific gravity, 4" 125# cast iron flange, with SS tag. |
| SERIES | 301 | | | | | | | | Top Mount Float Type Level Control |
| ENCLOSURE | | G | | | | | | | General Purpose, NEMA 1 |
| | WT | | | | | | | Weather tight, NEMA 1, 2, 3, 4, 4X |
| | E | | | | | | | Explosion-proof, NEMA 7, 9, Class I Groups B, C, D, Class II Groups E, F, G, Div. I & II; CSA approved Groups C, D, E, F, G only |
| | EV | | | | | | | Explosion-proof/Vapor-proof, NEMA 7, 9, Class I Groups B, C, D, Class II Groups E, F, G, Div. I & II; CSA approved Groups C, D, E, F, G only |
| CIRCUITS | | | 48XX | | | | | | Single Stage Mercury Switch, see chart A |
| | | 78XX | | | | | | Single Stage, Snap Switch, see chart A |
| | | 78XXHM | | | | | | Hermetically Sealed Snap Switch, see chart B |
| | | 98XX | | | | | | Single Stage, High Capacity DC Snap Switch, use heat fins (HF) if process temperature exceeds 350°F (177°C), do not exceed 450°F (232°C), see chart B |
FLOAT/
STOP/
GUIDE ROD | | | | 00 | | | | | No Float, No Guide Rod |
| | | | AS | | | | | 3-1/2" x 6" 304SS Float, 316SS Stops, 304SS Extension |
| | | | BS | | | | | 4-1/2" Copper Float, 316SS Stops, 304SS Extension |
| | | | CS | | | | | 4-1/2" 304SS Float, 316SS Stops, 304SS Extension |
| | | | DS | | | | | 7" 304SS Float, 316SS Stops, 304SS Extension |
| | | | ES | | | | | 7" Copper Float, 316SS Stops, 304SS Extension |
| | | | A0 | | | | | 3-1/2" x 6" 304SS Float, 316SS Stops, No Extension |
| | | | B0 | | | | | 4-1/2" Copper Float, 316SS Stops, No Extension |
| | | | C0 | | | | | 4-1/2" 304SS Float, 316SS Stops, No Extension |
| | | | D0 | | | | | 7" 304SS Float, 316SS Stops, No Extension |
| | | | E0 | | | | | 7" Copper Float, 316SS Stops, No Extension |
OPERATING
POINT | | | | | XX | | | | ≥12 or ≤96. See Dimensional Drawing. |
SPECIFIC
GRAVITY | | | | | | 1.0 | | | 1.0 Specific Gravity |
| | | | | | .9 | | | 0.9 Specific Gravity |
| | | | | | .82 | | | 0.82 Specific Gravity |
| | | | | | .75 | | | 0.75 Specific Gravity |
| | | | | | .62 | | | 0.62 Specific Gravity |
| | | | | | .50 | | | 0.50 Specific Gravity |
| FLANGE | | | | | | | 0 | | No Flange |
| | | | | | | 7 | | 4" 150# RF Carbon Steel |
| | | | | | | 8 | | 5" 150# RF Carbon Steel |
| | | | | | | 9 | | 6" 150# RF Carbon Steel |
| | | | | | | 10 | | 8" 150# RF Carbon Steel |
| | | | | | | 12 | | 4" 300# RF Carbon Steel |
| | | | | | | 13 | | 5" 300# RF Carbon Steel |
| | | | | | | 14 | | 6" 300# RF Carbon Steel |
| | | | | | | 15 | | 8" 300# RF Carbon Steel |
| | | | | | | 7S | | 4" 150# RF 316SS |
| | | | | | | 8S | | 5" 150# RF 316SS |
| | | | | | | 9S | | 6" 150# RF 316SS |
| | | | | | | 10S | | 8" 150# RF 316SS |
| | | | | | | 12S | | 4" 300# RF 316SS |
| | | | | | | 13S | | 5" 300# RF 316SS |
| | | | | | | 14S | | 6" 300# RF 316SS |
| | | | | | | 15S | | 8" 300# RF 316SS |
| OPTIONS | | | | | | | | HF | Heat Fins |
| | | | | | | | R | Manual Reset - Single Stage |
| | | | | | | | R1 | Manual Reset - Lower Stage 2-Stage Control |
| | | | | | | | STW | SS Tag Wired |
| | | | | | | | 01 | Breather Only (E-Housing only) |
| | | | | | | | 02 | Drain Only (E-Housing only) |
| | | | | | | | 12 | Breather and Drain (E-Housing only) |
| | | | | | | | 14210.40 | Spec. 14210 for Sch 40 |
| | | | | | | | 14210.80 | Spec. 14210 for Sch 80 |
| | | | | | | | 23720 | Fungus Proofing |
