Series 205 Welded Construction
Long life and reliable operation is inherent in the design of the 205 series. The heavy duty welded carbon steel chamber provides a control to operate up to 1250 psi (86 bar) and process temperature up to 650°F (343°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 (0.75). 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. Check the current chart for the switch best suited for your application. Standard process connections are combination 1" NPT and 1" socket weld hubs. Flanged connections are offered as an option. Contact factory for ANSI B31.1.
Product Applications
- Refineries, chemical plants, power generating stations, water treatment plants, mixing systems, scrubbers, accumulators, condensate recovery, industrial tanks and vessels.
Specifications
- C1-75:
- Minimum specific gravity 0.75. Process pressure 1250 psig (86 bar) @ 100°F (38°C), 650°F (343°C).*
- Temperature Limit:
- Ambient Temperature: 212° F (100°C); Process Temperature: up to 650°F (343°C).
*Heat fins (HF) and/or high temperature switches should be considered for process temperatures above 500°F (260°C). - Switch Type:
- Snap action or mercury. See charts A and B.
- Electrical Rating:
- See charts A and B.
- Wiring Connections:
- G, WT or E enclosure, terminal block. EV enclosure 18" (460 mm) leads.
- Process Connections:
- Combination 1" NPT/socket weld hubs or flanges. See chart C.
- Enclosures:
- G, painted steel and aluminum; WT, painted steel, aluminum and neoprene; E, aluminum; EV, aluminum and neoprene.
- Weight:
- 205, 40 lb (18 kg); 207, 50 lb (22.7 kg); 208, 57 lb (25.8 kg).
- Agency Approval:
- UL.
- Suggested Specifications
Liquid level control shall be 205 (207) (208) Series with combination 1" NPT/socket weld hubs (flanged) process connections. Chamber shall be welded suitable for operation at 1250 psig (86 bar) at 100°F (38°C), 650°F (343°C) at a minimum specific gravity of 0.75. Circuits shall be (hermetically sealed) snap action (mercury) switch (SPST) (SPDT), (DPDT). Enclosure shall be general purpose (weatherproof) (explosion-proof) (explosion-proof - vapor-proof). Switch mechanism shall be gravity return and shall be activated by a stainless steel float.
Model Chart
| EXAMPLE | 205 | WT | 7810 | 10 | C1 | 75 | 205-WT-7810-10-C1-75 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 0.75, operating pressure 1250 psig (86 bar) at 650ºF (343ºC). | |
| CONNECTION | 205 | Liquid level control | ||||||
| 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 | |||||||
| HFC1 | Heat fins carbon steel body | |||||||
| MINIMUM SPECIFIC GRAVITY |
75 | 0.75 specific gravity | ||||||
| OPTIONS | 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 |
| 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
|
| SP-ST open on level RISE |
10
|
5
|
3†
|
10
|
5
|
-4820
|
-4820
|
-20
|
UL
|
|
| SP-DT one switch |
4
|
2
|
1†
|
4
|
2
|
-4810
|
-4810
|
-10
|
UL
|
|
| SP-DT two switches E.I.* |
10
|
5
|
3†
|
10
|
5
|
-4815
|
-4815
|
-15
|
UL
|
|
| DP-ST two switches E.I.* open on level FALL |
10
|
5
|
3†
|
10
|
5
|
-4813
|
-4813
|
-13
|
UL
|
|
| DP-ST two switches E.I.* open on level RISE |
10
|
5
|
3†
|
10
|
5
|
-4814
|
-4814
|
-14
|
UL
|
|
| DP-DT two SP-DT switches |
4
|
2
|
1†
|
4
|
2
|
-4806
|
-4806
|
-06
|
UL
|
|
|
CHART B snap action contacts |
SP-DT one switch |
12
|
5
|
3†
|
0.5**
|
0.25**
|
-7810
|
-7810
|
-10
|
UL
|
| DP-DT Two SP-DT switches |
12
|
5
|
3†
|
0.5**
|
0.25**
|
-7806
|
-7806
|
-06
|
UL
|
|
| 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.
***30VDC = 5 resistive.
|
SERIES
|
MOUNTING STYLE
|
MINIMUM SPECIFIC GRAVITY
|
PRESSURE RATING AT
|
FLANGE CLASS (psi)
|
ORDER CODE
|
|
|
38°C
100°F |
400°F
650°C |
|||||
|
205
|
1" NPT
|
0.75
|
1250 psi
86 bar |
1250 psi
86 bar |
--
|
C1-75
|
|
207
208 |
FLANGED
|
0.75
|
275 psi
19 bar |
100 psi
7 bar |
150
|
C1-175
|
|
207
208 |
FLANGED
|
0.75
|
720 psi
50 bar |
425 psi
29 bar |
300
|
C1-375
|
|
207
208 |
FLANGED
|
0.75
|
1250 psi
86 bar |
1030 psi
71 bar |
600
|
C1-675
|
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.
-
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| Model | Description | Availability* | Price |
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