Series 221/223/224 Flanged Chamber Level Control

External Mount, Pressure to 1000 psig (69 bar) and Temperature to 475°F (246°C)

Heavy duty flanged chamber features removable float for ease of inspection and maintenance. The 221 Series also provides 1" NPT for standard external mounting. Socket weld hubs or flanges are optional. Rugged C1-75 construction is suitable for operation at 1000 psi (69 bar) at 100°F (38°C), and 850 psig (59 bar) at 475°F (246°C) with a minimum specific gravity of 0.75. C1-60 construction is suitable for operation at 600 psig (41 bar) at 100°F (38°C), and 550 psig (38 bar) at 475°F (246°C) with a minimum specific gravity of 0.60. Models featured can be ordered with various circuits including SPST, SPDT, or DPDT with hermetically sealed snap action or mercury contacts. A full range of enclosures are available including general purpose, weatherproof, explosion-proof, or explosion-proof – vapor proof.

Product Applications

  • Oil Refineries
  • Chemical Plants
  • Power Generating Stations
  • Pumping Stations
  • Heat Transfer Systems
  • Sanitary/Waste Water Facilities
  • Drip Legs
  • Hydraulic Systems
  • Boilers

Models & Ordering

Build Your Custom Part. Use our Product Configurator

Specifications

C1-60:
Minimum specific gravity 0.60; Process pressure 600 psig (41 bar) at 100°F (38°C), 550 psig (38 bar) at 475°F (246°C).
C1-75:
Minimum specific gravity 0.75; Process pressure 1000 psig (69 bar) at 100°F (38°C), 850 psig (59 bar) at 475°F (246°C).
Temperature Limit:
Ambient Temperature: 212°F (100°C); Process Temperature: up to 475°F (246°C).
Switch Type:
Snap action or mercury switch.
Electrical Rating:
See 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:
Chamber, carbon steel. Trim 316SS, 303SS, 304SS and 430SS.
Weight:
221: 60 lb (27 kg); 223: 70 lb (32 kg); 224: 77 lb (35 kg).
Suggested Specifications: Liquid level control shall be 221 (223) (224) Series with flanged carbon steel chamber, and removable float. Process connections shall be 1" NPT (socket weld hubs) (flanged). Control shall be suitable for operation at 600 psig (41 bar) at 100°F (38°C), and 550 psig (38 bar) at 475°F (246°C) with a minimum specific gravity of 0.60 (C1-60); or 1000 psig (69 bar) at 100°F (38°C), and 850 psig (59 bar) at 475°F (246°C) with a minimum specific gravity of 0.75 (C1-75). Circuit shall be (hermetically sealed) snap action (mercury) switch (SPST) (SPDT) (DPDT) with fixed deadband. Switch mechanism shall be gravity return and shall be activated by a stainless steel float. Enclosure shall be gen eral purpose, (weatherproof) (explosion-proof) (explosionproof – vapor proof).

Model Chart

 
EXAMPLE 221 WT 7810 C1 60   221-WT-7810-C1-60 Liquid Level Control, weatherproof enclosure, SPDT snap switch, fixed deadband, automatic reset, operating pressure 600 psig (41 bar) at 100°F (38°C), 550 psig (38 bar) at 475°F (246°C), side/bottom process connections, 1" NPT, minimum specific gravity 0.60.
CONNECTION 221           One Vertical and One Horizontal 1" NPT
223           One Vertical and One Horizontal Flanged Connection
224           Two Vertical Flanged Connections
224T            
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. 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, 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
SPECIFIC
GRAVITY
        60   0.60 Specific Gravity (221 only)
        75   0.75 Specific Gravity (221 only)
        160   0.60 Specific Gravity & 150# Flange (223, 224 only)
        175   0.75 Specific Gravity & 150# Flange (223, 224 only)
        360   0.60 Specific Gravity & 300# Flange (223, 224 only)
        375   0.75 Specific Gravity & 300# Flange (223, 224 only)
        660   0.60 Specific Gravity & 600# Flange (223, 224 only)
        675   0.75 Specific Gravity & 600# Flange (223, 224 only)
OPTIONS           H2 H2 Socket Weld Hub (221, steel housing only)
          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 (E-Housing only)
          02 Drain Only (E-Housing only)
          12 Breather & Drain (E-Housing Only)
          23720 Fungus Proofing

CHARTS A & B - ELECTRICAL CIRCUITS AND RATINGS

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.

CHART C - MOUNTING STYLE

SERIES
MOUNTING
STYLE
MINIMUM
SPECIFIC
GRAVITY
PRESSURE RATING @
FLANGE
CLASS
psi)
ORDER
CODE
100°F
38°C
475°F
246°C
221
1" NPT
0.6
600 psi
41 bar)
550 psi
38 bar)
--
C1-60
221
1" NPT
0.75
1000 psi
69 bar)
850 psi
(59 bar)
--
C1-75
223
224
Flanged
0.6
275 psi
(19 bar)
150 psi
(10 bar)
150
C1-060
223
224
Flanged
0.6
600 psi
(41 bar)
550 psi
(38 bar)
300
C1-360
223
224
Flanged
0.6
600 psi
(41 bar)
550 psi
(38 bar)
600
C1-660
223
224
Flanged
0.75
275 psi
(19 bar)
150 psi
(10 bar)
150
C1-075
223
224
Flanged
0.75
720 psi
(50 bar)
625 psi
(43 bar)
300
C1-375
223
224
Flanged
0.75
1000 psi
(69 bar)
850 psi
(59 bar)
600
C1-675

Product Literature

Manuals

Catalog Pages

SDS

Approvals

Drawings

Questions

Question
Why is the minimum specific gravity important on the float level switches?
Answer
If a medium has a lower s.g. than the rated minimum for a float, the float will sink through the media and the switch will not operate.

Photo Downloads

You must be logged in to view this content.
Click here to login to your account.