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Series-391-393-394
Weatherproof Level Control, Stainless Steel, 650 psig, 600 °F, for Refineries
Series-391-393-394
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| EXAMPLE | 391 | WT | 7810 | C1 | 70 | 391-WT-7810-C1-70 Liquid Level Control with welded carbon steel chamber, watertight – NEMA 4X enclosure, SPDT snap action switch rated 12 amp 120 VAC, 5 amp 240 VAC, fixed deadband and automatic reset, operating pressure 600 psig (41 bar) at 100ºF (38ºC), 500 psi (34 bar) at 600ºF (315ºC), side/bottom process connections 1” NPT, minimum specific gravity 0.70. | |
| CONNECTION | 391 | One Horizontal and One Vertical 1” NPT or Socket Weld | |||||
| 393 | One Vertical and One Horizontal Flanged Connection | ||||||
| 394 | Two Vertical Flanged Connections | ||||||
| ENCLOSURE | G | General purpose, NEMA 1 | |||||
| WT | Weatherproof, NEMA 3R, 4, 4X | ||||||
| E | Explosion-proof, NEMA 7, 9, Class I Groups B, C, D, Class II Groups E, F, G | ||||||
| EV | Explosion-proof, vapor proof, NEMA 7, 9, Class I Groups B, C, D, Class II Groups E, F, G | ||||||
|
CIRCUITS (for electrical circuits, See charts A & B below) |
48XX | Single stage, mercury switch, see chart A. | |||||
| 48XX | Two stage, mercury switch, see chart A. | ||||||
| 78XX | Single stage, snap switch, see chart B. | ||||||
| 78XX | 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 | Two stage, high capacity DC snap switch, see chart B. | ||||||
| 10XX | Single stage, high temperature snap switch, see chart B. | ||||||
| 10XX | Two stage, high temperature snap switch, see chart B. | ||||||
| CHAMBER MATERIAL | Refer to chart C below for pressure/temperature ratings | ||||||
| C1 | Carbon steel body | ||||||
|
MINIMUM SPECIFIC GRAVITY |
70 | 0.70 specific gravity (391 only) | |||||
| 80 | 0.80 specific gravity (391 only) | ||||||
| 95 | 0.95 specific gravity (391 only) | ||||||
| 170 | 0.70 specific gravity & 150# flange (393, 394 only) | ||||||
| 180 | 0.80 specific gravity & 150# flange (393, 394 only) | ||||||
| 195 | 0.95 specific gravity & 150# flange (393, 394 only) | ||||||
| 370 | 0.70 specific gravity & 300# flange (393, 394 only) | ||||||
| 380 | 0.80 specific gravity & 300# flange (393, 394 only) | ||||||
| 395 | 0.95 specific gravity & 300# flange (393, 394 only) | ||||||
| 670 | 0.70 specific gravity & 600# flange (393, 394 only) | ||||||
| 680 | 0.80 specific gravity & 600# flange (393, 394 only) | ||||||
| 695 | 0.95 specific gravity & 600# flange (393, 394 only) | ||||||
| OPTIONS | H2 | 1” socket weld hub instead of 1” NPT | |||||
| 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 |