Mercoid Series 1211/1213/1214
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Flanged Chamber Level Control |
External Mount, Pressure to 450 psig (31 bar), Temperature to 500°F (260°C) |
Low minimum specific gravity of 0.40 and rugged flanged chamber for inspection purposes helps insure superior long term performance. Control can be used at maximum process pressure of 450 psig (31 bar) at 100°F (38°C), and 300 psig (21 bar) at 500°F (260°C). Standard 1" NPT connections are provided for mounting. 19 socket weld hubs or 1" flanges are available as options. Hermetically sealed snap switch or mercury switches are provided in a variety of circuit configurations such as SPST, SPDT, or DPDT. High or low DC applications can also be accommodated. General purpose, weatherproof, explosion-proof, or explosion-proof – vapor proof enclosures are provided. Download Catalog Page |
Specifications: |
- C1-40: Minimum specific gravity 0.40. Process pressure 450 psig (31 bar) at 100°F (38°C), 300 psig (21 bar) at 500°F (260°C).
- Switch Type: Snap action or mercury; see Model Chart.
- Electrical Rating: See Model Chart.
- Wiring Connections: G, WT or E enclosure, terminal block. EV enclosure, 18" (460 mm) leads.
- Process Connections: 1" NPT or flanges. See model chart. (1" socket weld-hubs optional).
- Enclosures: G: painted steel and aluminum; WT: painted steel, aluminum and neoprene; E: aluminum; EV: aluminum, neoprene.
- Wetted Parts: C1 construction. Chamber: carbon steel. Trim: 303SS, 304SS, and 430SS (316SS and 430SS optional).
- Weight: 1211: 34 lb (15.5 kg); 1213: 44 lb (20 kg); 1214: 47 lb (21.4 kg).
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Model Chart (click to open/close)
EXAMPLE |
1211 |
WT |
7810 |
C1 |
40 |
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1211-WT-7810-C1-40 Liquid Level Control, weatherproof enclosure, SPDT snap switch, fixed deadband, automatic reset, operating pressure 450 psig (31 bar) at 100°F (38°C), 300 psig (21 bar) at 500°F (260°C), side/bottom process connections, 1" NPT, minimum specific gravity 0.40. |
CONNECTION |
1211 |
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One Vertical and One Horizontal 1" NPT |
1213 |
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One Vertical and One Horizontal Flanged Connection |
1214 |
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Two Vertical Flanged Connections |
ENCLOSURE |
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G |
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General Purpose, NEMA 1 |
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WT |
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Weatherproof, NEMA 3R, 4, 4X |
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E |
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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. |
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EV |
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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) |
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48XX |
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Single Stage Mercury Switch, see chart A |
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48XX-XX |
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Two Stage, Mercury Switch, see chart A |
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78XX |
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Single Stage, Snap Switch, see chart B |
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78XX-XX |
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Two Stage, Snap Switch, see chart B |
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78XXHM |
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Hermetically Sealed Snap Switch, see chart B |
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98XX |
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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 |
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98XX-XX |
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Two 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 |
CHAMBER MATERIAL |
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C1 |
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Carbon Steel Body |
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C216 |
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316SS Body |
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HFC1 |
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Heat Fins & Carbon Steel Body |
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HFC216 |
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Heat Fins & 316SS Body |
MINIMUM
SPECIFIC
GRAVITY |
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40 |
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0.40 Specific Gravity |
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140 |
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0.40 Specific Gravity & 150# Flange |
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340 |
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0.40 Specific Gravity & 300# Flange |
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640 |
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0.40 Specific Gravity & 600# Flange |
OPTIONS |
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H2 |
H2 Socket Weld Hub |
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R |
Manual Reset, Single Stage |
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R1 |
Manual Reset, Lower Stage 2-Stage Control |
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R2 |
Manual Reset, Upper Stage 2-Stage Control |
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R3 |
Manual Reset, Both Stages 2-Stage Control |
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STW |
SS Tag Wired |
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01 |
Breather Only |
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02 |
Drain Only |
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12 |
Breather & Drain |
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23720 |
Fungus Proofing |
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Charts A & B - Electrical Circuits and Ratings
SWITCH TYPE |
SWITCH ACTION
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ELECTRICAL RATINGS IN AMPS
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ORDERING CODE
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AC
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DC
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SINGLE STAGE
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TWO STAGE
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120V
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240V
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440V
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30V
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125V
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250V
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LOWER
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UPPER
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CHART A
Mercury Contacts |
SP-ST open on level FALL |
10
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5
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3†
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10
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5
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-4820
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-4820
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-21
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SP-ST open on level RISE |
10
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5
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3†
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10
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5
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-4821
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-4821
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-20
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SP-DT one switch |
4
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2
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1†
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4
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2
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-4810
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-4810
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-10
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SP-DT two switches E.I.* |
10
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5
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3†
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10
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5
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-4815
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-4815
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-15
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DP-ST two switches E.I.* open on level FALL |
10
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5
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3†
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10
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5
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-4814
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-4814
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-13
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DP-ST two switches E.I.* open on level RISE |
10
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5
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3†
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10
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5
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-4813
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-4813
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-14
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DP-DT two SP-DT switches |
4
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2
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1†
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4
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2
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-4806
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-4806
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-06
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CHART B
snap action contacts |
SP-DT one switch |
12
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5
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3†
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0.5**
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0.25**
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-7810
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-7810
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-10
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DP-DT two SP-DT switches |
12
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5
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3†
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0.5**
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0.25**
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-7806
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-7806
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-06
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SP-DT one hermetically sealed switch |
5
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5
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5**
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-7810HM
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-7810HM
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-10HM
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DP-DT two hermetically sealed SP-DT switches |
5
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5
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5**
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-7806HM
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-7806HM
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-06HM
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DP-DT two SP-DT switches |
10
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3
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10‡
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3‡
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-9806
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-9806
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-06
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SP-DT one switch |
10
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3
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10‡
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3‡
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-9810
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-9810
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-10
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†Available on special order, change 1st digit in ordering code from 4 to 5 or 7 to 8, i.e., -4820 becomes -5820, -7810 becomes -8810, etc. |
‡10 amp inductive (polarized) at 125 VDC. |
*Electrically Independent. |
**Resistive. |
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