C1-75:Minimum specific gravity 0.75. Process pressure 1250 psig (86 bar) @ 100°F (38°C), 650°F (343°C).*
Temperature Limit:Ambient Temperature: 212° F (100°C); Process Temperature: up to 650°F (343°C).
*Heat fins (HF) and/or high temperature switches should be considered for process temperatures above 500°F (260°C).
Switch Type:Snap action or mercury. See charts A and B.
Electrical Rating:See charts A and B.
Wiring Connections:G, WT or E enclosure, terminal block. EV enclosure 18" (460 mm) leads.
Process Connections:Combination 1" NPT/socket weld hubs or flanges. See chart C.
Enclosures:G, painted steel and aluminum; WT, painted steel, aluminum and neoprene; E, aluminum; EV, aluminum and neoprene.
Weight:205, 40 lb (18 kg); 207, 50 lb (22.7 kg); 208, 57 lb (25.8 kg).
Agency Approval:UL.
| EXAMPLE | 205 | WT | 7810 | 10 | C1 | 75 | | 205-WT-7810-10-C1-75 Liquid Level Control, welded carbon steel chamber, weatherproof enclosure, SPDT snap switch, fixed deadband, automatic reset, side/bottom process connections, combination 1" NPT/socket weld hubs, minimum specific gravity 0.75, operating pressure 1250 psig (86 bar) at 650ºF (343ºC). |
| CONNECTION | 205 | | | | | | | Liquid level control |
| ENCLOSURE | | G | | | | | | General purpose, NEMA 1 |
| | WT | | | | | | Weatherproof, NEMA 3R, 4, 4X (Not CSA) |
| | E | | | | | | Explosion-proof, NEMA 7, 9, Class I Groups B, C, D, Class II Groups E, F, G (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 (CSA approved Groups C, D, E, F, G only) |
CIRCUITS
(for electrical circuits,
See charts A & B below) | | | 48XX | | | | | Single stage, mercury switch, see chart A. |
| | | 48XX | XX | | | | Two stage, mercury switch, see chart A. |
| | | 78XX | | | | | Single stage, snap switch, see chart B. |
| | | 78XX | XX | | | | Two stage, snap switch, see chart B. |
| | | 78XXHM | | | | | Hermetically sealed snap switch, see chart B. |
| | | 98XX | | | | | Single stage, high capacity DC snap switch, see chart B. |
| | | 98XX | XX | | | | Two stage, high capacity DC snap switch, see chart B. |
| | | 10XX | | | | | Single stage, high temperature snap switch, see chart B. |
| | | 10XX | XX | | | | Two stage, high temperature snap switch, see chart B. |
CHAMBER
MATERIAL | | | | | | | | Refer to chart C below for pressure/temperature ratings |
| | | | | C1 | | | Carbon steel body |
| | | | | HFC1 | | | Heat fins carbon steel body |
MINIMUM SPECIFIC
GRAVITY | | | | | | 75 | | 0.75 specific gravity |
| OPTIONS | | | | | | | R | Manual reset for single stage |
| | | | | | | R1 | Manual reset for lower stage of 2-stage controls |
| | | | | | | R2 | Manual reset for upper stage of 2-stage controls |
| | | | | | | R3 | Manual reset for both stages of 2-stage controls |
| | | | | | | STW | SS tag wired |
| | | | | | | 01 | Breather only (E-Housing only) |
| | | | | | | 02 | Drain only (E-Housing only) |
| | | | | | | 12 | Breather and drain (E-Housing only) |
| | | | | | | 23720 | Fungus proofing special 23720 |
