Mercoid Series 215/217/218
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| Flanged Chamber Level Control |
| Adjustable Deadband 12" to 24", Pressure to 450 psig (31 bar), Temperature to 500°F (260°C) |
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 Adjustable deadband, flanged chamber and side mount are featured in the heavy duty reliable 215 series. A choice of four operating styles are offered: 1. Single stage adjustable deadband suitable for pump operation; 2. Two stage operation with adjustable lower stage, fixed upper stage for pump and high alarm; 3. Fixed lower stage and adjustable upper stage for pump and low alarm; 4. Fixed upper and lower stage for high and low alarm. Alarm stages can also be used for shutdown. Adjustable level changes are available in increments of 12", 24", 36", or 48". Download Catalog Page
- Oil refineries
- Chemical plants
- Power generating stations
- Pumping stations
- Heat transfer systems
- Sanitary/waste water facilities
- Drip legs
- Hydraulic systems
- Boiler
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Specifications:
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Minimum Specific Gravity: 0.60.
Switch Type: Snap action or mercury. See Model Chart.
Electrical Ratings: See Model Chart.
Wiring Connections: G, WT or E enclosure, terminal block. EV enclosure, 18" (460 mm) leads.
Process Connections: 1" NPT standard (1" socket weld hubs or flanges optional).
Enclosures: G: painted steel and aluminum; WT: painted steel, aluminum, neoprene; E: aluminum; EV: aluminum and neoprene.
Wetted Parts: C1 construction. Chamber, carbon steel. Float and trim 303SS, 304SS, 430SS.
Weight: 215: 50 lb (22.7 kg); 217: 60 lb (27 kg); 218: 67 lb (30.4 kg).
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Model Chart (click to open/close)
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EXAMPLE
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215
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2
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WT
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7810-10
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C1
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60
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L12
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215-2-WT-7810-10-C1-60-L12 Level Control, flanged carbon steel chamber, weatherproof enclosure, (2) SPDT snap action switches, lower stage adjustable deadband, upper stage fixed deadband, operating pressure 450 psig @ 100°F, side/bottom 1" NPT process connections, minimum s.g. 0.60.
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| CONNECTION |
215 |
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One Horizontal and One Vertical 1" NPT |
| 217 |
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One Vertical and One Horizontal Flanged Connection |
| 218 |
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Two Vertical Flanged Connections |
| DEADBAND |
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1 |
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Single Stage Operation, with Adjustable Deadband |
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2 |
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Two Stage Operation, Lower Stage has Adjustable Deadband, Upper Stage has Fixed Deadband |
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3 |
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Two Stage Operation, Lower Stage has Fixed Deadband, Upper Stage has Adjustable Deadband |
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4 |
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Two Stage Operation, Both Stages have Fixed Deadband with Adjustable Spread Between Stages |
| 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 |
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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 |
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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60 |
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0.60 Specific Gravity |
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160 |
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0.60 Specific Gravity & 150# Flange |
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360 |
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0.60 Specific Gravity & 300# Flange |
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660 |
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0.60 Specific Gravity & 600# Flange |
| OPTIONS |
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H2 |
H2 Socket Weld Hub |
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L12 |
Adjustable Level Change |
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L24 |
Adjustable Level Change |
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L36 |
Adjustable Level Change |
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L48 |
Adjustable Level Change |
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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 (click to open/close)
| 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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