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Mercoid Series 211 / 213 / 214

Flanged Chamber Level Control
External Mount, Pressure to 450 psig (31 bar), Temperature to 500°F (260°C)
 

Series 211A removable stainless steel float enclosed in a flanged carbon steel chamber is featured in the durable, field proven 211 Series. External side mount series includes 1" NPT process connections as standard, or with socket weld hubs; or, 1" flanges as options. Pressure and temperature limits are 450 psi (31 bar) at 100°F (38°C), and 300 psi (21 bar) at 500°F (260°C). Minimum specific gravity for all models is 0.60. The models shown can be ordered with a variety of electrical arrangements including SPST, SPDT, or DPDT circuits in hermetically sealed snap action or mercury contacts. Switches can be ordered open on level rise or fall. Single pole double throw electrically independent circuits are available as well as low current or high DC current applications. A full range of enclosures are offered including general purpose NEMA 1; weatherproof NEMA 4X; (explosion-proof) and (explosion-proof/vapor-proof) Groups B, C, D, E, F, G, NEMA 7, 9.

Mercoid Series 211 Mercoid Series 211 (1204 KB)

Series 211 Specifications:
Minimum Specific Gravity: 0.60
Switch Type: Snap or mercury switch. See charts A and B on Model Chart.
Electrical Rating: See charts A and B on Model Chart.
Wiring Connections: G, WT or E enclosure, terminal block. EV enclosure, 18" (460 mm) leads.
Process Connections: 1" NPT standard (socket weld hubs or flanges optional). See Model Chart.
Enclosures: G, painted steel and aluminum. WT, painted steel, aluminum and neoprene. E, aluminum. EV, aluminum and neoprene.
Wetted Parts: C1 construction. Chamber: carbon steel; Trim: 303SS, 304SS, and 430SS (316SS and 430SS optional).
Weight: 211: 34 lb (15 kg); 213: 44 lb (20 kg); 214: 51 lb (23 kg)
 
Model Chart (click to open/close)
EXAMPLE 211 WT 7810 C1 60   211-WT-7810-C1-60 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 0.60.
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-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, use heat fins (HF) if process temperature exceeds 350°F (177°C), do not exceed 450°F (232°C), see chart B
    98XX-XX       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
    10XX       Single Stage, High Temp. Snap Switch, continuous rating 800°F (425°C), see chart B
    10XX-XX       Two Stage, High Temp. Snap Switch, continuous rating 800°F (425°C), see chart B
CHAMBER MATERIAL       C1     Carbon Steel Body
      C216     316SS Body
      HFC1     Heat Fins & Carbon Steel Body
      HFC216     Heat Fins & 316SS Body
MINIMUM
SPECIFIC
GRAVITY
        60   0.60 Specific Gravity
        160   0.60 Specific Gravity & 150# Flange
        360   0.60 Specific Gravity & 300# Flange
        660   0.60 Specific Gravity & 600# Flange
OPTIONS           H2 H2 Socket Weld Hub
          R Manual Reset, Single Stage
          R1 Manual Reset, Lower Stage 2-Stage Control
          R2 Manual Reset, Upper Stage 2-Stage Control
          R3 Manual Reset, Both Stages 2-Stage Control
          STW SS Tag Wired
          01 Breather Only
          02 Drain Only
          12 Breather & Drain
          23720 Fungus Proofing
 
Charts A & B - Electrical Circuits and Ratings (click to open/close)
SWITCH TYPE
SWITCH ACTION
ELECTRICAL RATINGS IN AMPS
ORDERING CODE
AC
DC
SINGLE STAGE
TWO STAGE
120V
240V
440V
30V
125V
250V
LOWER
UPPER
CHART A
Mercury Contacts
SP-ST open on level FALL
10
5
3†
 
10
5
-4821
-4821
-21
SP-ST open on level RISE
10
5
3†
 
10
5
-4820
-4820
-20
SP-DT one switch
4
2
1†
 
4
2
-4810
-4810
-10
SP-DT two switches E.I.*
10
5
3†
 
10
5
-4815
-4815
-15
DP-ST two switches E.I.* open on level FALL
10
5
3†
 
10
5
-4813
-4813
-13
DP-ST two switches E.I.* open on level RISE
10
5
3†
 
10
5
-4814
-4814
-14
DP-DT two SP-DT switches
4
2
1†
 
4
2
-4806
-4806
-06
CHART B
snap action contacts
SP-DT one switch
12
5
3†
 
0.5**
0.25**
-7810
-7810
-10
DP-DT two SP-DT switches
12
5
3†
 
0.5**
0.25**
-7806
-7806
-06
SP-DT one hermetically sealed switch
5
5
 
5**
 
 
-7810HM
-7810HM
-10HM
DP-DT two hermetically sealed SP-DT switches
5
5
 
5**
 
 
-7806HM
-7806HM
-06HM
DP-DT two SP-DT switches
10
3
 
 
10‡
3‡
-9806
-9806
-06
SP-DT one switch
10
3
 
 
10‡
3‡
-9810
-9810
-10
DP-DT Two SP-DT switches
2
2
 
 
0.4**
0.25**
-1006
-1006
-06
SP-DT one switch
2
2
 
 
0.4**
0.25**
-1010
-1010
-10
 
†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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