Series 1221/1223/1224 Flanged Chamber Level Control

Flanged Chamber Level Control External Mount, Pressure to 1000 psig (69 bar), Temperature to 475°F (246°C), Minimum Specific Gravity 0.40

External Mount, Pressure to 1000 psig (69 bar), Temperature to 475°F (246°C), Minimum Specific Gravity 0.40

Low specific gravity and superior long term performance make this Series ideal for applications which require operation at specific gravities as low as 0.40. This Series also provides a heavy duty flanged chamber with removable stainless steel float for easy inspection and maintenance. Chamber is rated for operation of 1000 psig (69 bar) at 100°F (38°C), and 850 psig (59 bar) at 475°F (246°C). 1" NPT process connections are standard. Socket weld hubs or flanged connections are optional. Various circuits are available in SPST, SPDT or DPDT configurations with hermetically sealed snap action or mercury contacts. Enclosures are 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/Wastewater Facilities
  • Drip Legs
  • Hydraulic Systems
  • Boilers
More Information
Price$0.00
Model Chart
EXAMPLE1221WT7810C140 1221-WT-7810-C1-40 Liquid Level Control, weatherproof enclosure, SPDT snap switch, fixed deadband, automatic reset, operating pressure 1000 psig (69 bar) at 100°F (38°C), 850 psig (59 bar) at 475°F (246°C), side/bottom process connections, 1" NPT, minimum specific gravity 0.40.
CONNECTION1221     One Vertical and One Horizontal 1" NPT
1223     One Vertical and One Horizontal Flanged Connection
1224     Two Vertical Flanged Connections
1224T      
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
CHAMBER MATERIAL   C1  Carbon Steel Body
   C216  316SS Body
   HFC1  Heat Fins & Carbon Steel Body
MINIMUM
SPECIFIC
GRAVITY
    40 0.40 Specific Gravity (1221 only)
    140 0.40 Specific Gravity & 150# Flange (1223, 1224 only)
    340 0.40 Specific Gravity & 300# Flange (1223, 1224 only)
    640 0.40 Specific Gravity & 600# Flange (1223, 1224 only)
OPTIONS     H2H2 Socket Weld Hub (1221, steel housing only)
     RManual Reset, Single Stage
     R1Manual Reset, Lower Stage 2-Stage Control
     R2Manual Reset, Upper Stage 2-Stage Control
     R3Manual Reset, Both Stages 2-Stage Control
     STWSS Tag Wired
     01Breather Only (E-Housing only)
     02Drain Only (E-Housing only)
     12Breather & Drain (E-Housing only)
     23720Fungus 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
-4820
-4820
-21
SP-ST open on level RISE
10
5
3†
 
10
5
-4821
-4821
-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
-4814
-4814
-13
DP-ST two switches E.I.* open on level RISE
10
5
3†
 
10
5
-4813
-4813
-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

†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.

Minimum Specific Gravity: 0.40. Process pressure 1000 psig (69 bar) at 100°F (38°C); 850 psig (59 bar) at 475°F (246°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, neoprene; E: aluminum; EV: aluminum, neoprene.
Wetted Parts: C1 construction. Chamber, carbon steel. Trim 303SS, 304SS, 316SS and 430SS.
Weight: 1221: 64 lb (29 kg); 1223: 74 lb (33.6 kg); 1224: 81 lb (36.7 kg).