Series 201/203/204 Side Mounted-Chamber Type Level Control

Operating Pressures to 500 psig, 34 bar, Hermetically Sealed Snap Switch Option

Long life and reliable operation is inherent in the design of the 201 series. The heavy duty welded carbon steel chamber provides a control to operate up to 1000 psi (69 bar) and process temperature up to 750°F (400°C), 400°F (205°C) at the electrical head assembly. The use of an external magnet reduces the possibility of magnetic particle build up inside the armature tube and subsequent loss of operation as may occur with the internal magnet repulsion design. Choice of construction provides equipment suitable for specific gravity as low as (0.60). Electrical requirements are met by use of hermetically sealed snap action or mercury switches in a variety of actions including SPST, SPDT, DPDT and DPST arrangements. Optional circuits are available for low current/voltage DC; high current DC; or high temperature applications. Standard process connections are combination 1" NPT and 1" socket weld hubs. Flanged connections are offered as an option.

Product Applications

  • Refineries
  • Chemical plants
  • Power generating stations
  • Water treatment plants
  • Mixing systems
  • Scrubbers
  • Accumulators
  • Condensate recovery
  • Industrial tanks and vessels

Models & Ordering

Build Your Custom Part. Use our Product Configurator

Model Number Description Usually Ships Price Order
201-WT-7810-C1-60 Chamber type level control, side mounted, SPDT snap switch. 1-2 Weeks $1,198.50 Order

Can't find what you need? Try our Product Configurator

Specifications

Service:
Compatible liquids.
Wetted Materials:
Body: carbon steel. Optional 316 SS. Float and Trim: 303 SS, 304 SS, 316 SS, and 430 SS. Options of 316 SS and 430 SS or all 316 SS.
Temperature Limits:
Process: 750°F (399°C). Heat fins should be used for process temperatures above 500°F (260°C) with mercury switches, 400°F (204°C) with snap switches, and 350°F (176.7°C) with hermetically sealed snap switches.
Pressure Limit:
600 psig (41 bar) at 100°F (37.7°C), 500 psig (34 bar) at 750°F (399°C). Higher ratings available.
Enclosure Rating:
NEMA 4X. Optional general purpose or explosion-proof.
Repeatability:
±1/4" (6.4 mm).
Switch Type:
SPDT snap switch, hermetically sealed snap switch or mercury switch. Optional DPDT or two stage.
Electrical Rating:
Snap Switch: 12A @ 120 VAC, 5A @ 240 VAC, 0.5A @ 125 VDC resistive, 0.25A @ 250 VDC resistive. Hermetically Sealed Snap Switch: 5A @ 125 VAC, 5A @ 240 VAC, 5A @ 30 VDC resistive. Mercury Switch: 4A @ 120 VAC/DC, 2A @ 240 VAC/DC. Higher contact ratings available for the mercury switch.
Electrical Connections:
Screw terminal.
Conduit Connection:
3/4" female NPT.
Process Connections:
1" female NPT and 1" socket weld hub. Optional flange connections.
Mounting Orientation:
Vertical.
Set Point Adjustment:
±1" (25.4 mm).
Weight:
201: 33 lb (14.97 kg); 203: 37 lb (17 kg); 204: 44 lb (20 kg).
Agency Approvals:
UL and CSA.
Specific Gravity:
0.6 minimum.

Model Chart

EXAMPLE 201 WT 7810 10 C1 60   201-WT-7810-10-C1-60 Liquid Level Control, welded carbon steel chamber, weatherproof enclosure, SPDT snap switch, fixed deadband, automatic reset, side/bottom process connections, combination 1” NPT/socket weld hubs, minimum specific gravity 0.60, operating pressure 600 psig (41 bar) at 100ºF (38ºC), 500 psi (34 bar) at 750ºF (400ºC).
CONNECTION 201             One Horizontal and One Vertical 1” NPT or Socket Weld
203             One Vertical and One Horizontal Flanged Connection
204             Two Vertical Flanged Connections
ENCLOSURE   G           General purpose, NEMA 1
  WT           Weatherproof, NEMA 3R, 4, 4X (Not CSA)
  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, see chart B.
    98XX XX       Two stage, high capacity DC snap switch, see chart B.
    10XX         Single stage, high temperature snap switch, see chart B.
    10XX XX       Two stage, high temperature snap switch, see chart B.
CHAMBER
MATERIAL
              Refer to chart C below for pressure/temperature ratings
        C1     Carbon steel body
        C216     316 SST body
        C217     316 SST body with shield
        HFC1     Heat fins carbon steel body
        HFC216     Heat fins 316 SST body
        HFC217     Heat fins 316 SST body with shield
MINIMUM SPECIFIC
GRAVITY
          60   0.60 specific gravity
          75   0.75 specific gravity
          160   0.60 specific gravity & 150# flange
          175   0.75 specific gravity & 150# flange
          360   0.60 specific gravity & 300# flange
          375   0.75 specific gravity & 300# flange
          660   0.60 specific gravity & 600# flange
          675   0.75 specific gravity & 600# flange
OPTIONS             H1 1 inch vent
            H215 1-1/2 inch socket weld hub
            H220 2 inch socket weld hub
            R Manual reset for single stage
            R1 Manual reset for lower stage of 2-stage controls
            R2 Manual reset for upper stage of 2-stage controls
            R3 Manual reset for both stages of 2-stage controls
            STW SS tag wired
            01 Breather only (E-Housing only)
            02 Drain only (E-Housing only)
            12 Breather and drain (E-Housing only)
            23720 Fungus proofing special 23720

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
125V
250V
LOWER
UPPER
CHART A
Mercury Contacts
SP-ST open on level FALL
10
5
3†
 10
5
-4821
-4821
-21
UL
CSA
SP-ST open on level RISE
10
5
3†
 
10
5
-4820
-4820
-20
UL
CSA
SP-DT one switch
4
2
1†
 4
2
-4810
-4810
-10
UL
CSA
SP-DT two switches E.I.*
10
5
3†
 10
5
-4815
-4815
-15
UL
CSA
DP-ST two switches E.I.* open on level FALL
10
5
3†
 
10
5
-4813
-4813
-13
UL
CSA
DP-ST two switches E.I.* open on level RISE
10
5
3†
 10
5
-4814
-4814
-14
UL
CSA
DP-DT two SP-DT switches
4
2
1†
 4
2
-4806
-4806
-06
UL
CSA
CHART B
snap action contacts
SP-DT one switch
12
5
3†
 0.5**
0.25**
-7810
-7810
-10
UL
CSA
DP-DT Two SP-DT switches
12
5
3†
 0.5**
0.25**
-7806
-7806
-06
UL
CSA
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.
***30VDC = 5 resistive.

CHART C - MOUNTING STYLE

SERIES
MOUNTING
STYLE
MINIMUM
SPECIFIC
GRAVITY
PRESSURE RATING @
FLANGE
CLASS
psi)
ORDER
CODE
38°C
100°F

 
400°C
750°F

 
201
1" NPT
0.6
600 psi
(41 bar)
500 psi
(34bar)
--
C1-60
201
1" NPT
0.75
1000 psi
(69 bar)
750 psi
(52 bar)
--
C1-75
203
204
Flanged
0.6
275 psi
(19 bar)
100 psi
(7 bar)
150
C1-160
203
204
Flanged
0.75
275 psi
(19 bar)
100 psi
(7 bar)
150
C1-175
203
204
Flanged
0.6
600 psi
(41 bar)
425 psi
(29 bar)
300 C1-360
203
204
Flanged
0.75
720 psi
(49 bar)
425 ps(29 bar) 300 C1-375
203
204
Flanged
0.6
600 psi
(41 bar)
500 psi
(34 bar)
600 C1-660
203
204
Flanged
0.75
1000 psi
(69 bar)
750 psi
(51 bar)
600 C1-675

Product Literature

Manuals

Catalog Pages

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.

Feedback

Close[X]