Series 391/393/394 Catalog Page

Series 391/393/394 Catalog Page
329_Layout 2 7/12/13 12:08 PM Page 329
Series
201
Side Mounted-Chamber Type Level Control
Operating Pressures to 500 PSIG, 34 bar, Hermetically Sealed Snap Switch Option
Model 201 liquid level control is designed for long life and reliable operation in chemical plants, refineries and
industrial facilities. SS switching mechanism uses gravity return action instead of springs to prolong life.
Weatherproof enclosure is standard. Heavy duty, welded steel float chamber is suitable for 500 psi at 750°F.
4 [101.60]
CLEARANCE 6-3/4
FOR COVER [171.45]
Ø5-3/4
REMOVAL
[146.05]
3/4
FEMALE
NPT
ELEC.
3-1/4
CONN. [82.55]
18-5/8
[473.08]
B
10-15/16
[277.83]
A
3-3/4
[95.25]
1 FEMALE NPT
PROCESS
CONNECTION
TYP 2 PLACES
SP.GR *A
B
1.0
6-3/4˝(171mm) 3/4˝ (19 mm)
0.6
7-1/2˝ (191 mm) 1˝ (25.4 mm)
Model
201-WT-4810-C1-60
201-WT-7810-C1-60
201-WT-7810HM-C1-60
*A is adjustable ±1˝ (25.4 mm)
Series
391
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 Limit: 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 (IP66). 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: 33 lb (14.97 kg).
Agency Approvals: UL (None on HM switch)
Specific Gravity: 0.6 minimum.
Switch Type
SPDT Mercury
SPDT Snap
SPDT Hermetically Sealed Snap
Side Mounted-Chamber Type Level Control
Compact, Low Cost, Hermetically Sealed Snap Switch Option
4 [101.60]
CLEARANCE
FOR COVER
REMOVAL
Heavy duty and low cost is the perfect description for the 391 Series level control. SS switching mechanism uses
gravity return action instead of springs for long life. Weatherproof enclosure is standard. Welded steel chamber is
good for 650 psig (45 bar) at 600°F (315°C).
6-3/4
[171.45]
Ø5-3/4
[146.05]
APPLICATIONS
Oil refineries, chemical plants, power generating stations, pumping stations, heat transfer systems,
sanitary/waste water facilities, drip legs, hydraulic systems, boilers.
3/4 FEMALE
NPT ELEC.
CONN.
3-7/16
[87.31]
B
A
1 FEMALE NPT
PROCESS
CONNECTION
TYP 2 PLACES
SP.GR A
B
1.0
4-3/8˝ (111mm)
1˝ (25.4 mm)
0.80
4-11/16˝ (191 mm) 1-3/16˝ (112.3 mm)
Level Switches,
Float
Model
391-WT-4810-C1-80
391-WT-7810-C1-80
391-WT-7810HM-C1-80
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. Optional 1˝
socket weld hub or flange connections.
Mounting Orientation: Vertical.
Weight: 10 lb (4.5 kg).
Agency Approvals: UL (None on HM switch)
Specific Gravity: 0.8 min. Optional 0.7 min.
Switch Type
SPDT Mercury
SPDT Snap
SPDT Hermetically Sealed Snap
CONTACT US | U.S. 219/879-8000 | U.K. (+44) (0)1494-461707 | A.U. (+61) (0) 2 4272 2055 | China +852-23181007
LEVEL
3-3/4
[95.25]
14-11/16
[373.06]
6-1/2
[165.10]
SPECIFICATIONS
Service: Compatible liquids.
Wetted Materials: Body: Carbon steel; Float and
trim: 303 SS, 304 SS, 316 SS, and 430 SS.
Temperature Limit: Process: 600°F (315.6°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: 800 psig (55 bar) at 100°F
(37.7°C), 650 psig (45 bar) at 600°F (315.6°C).
Higher ratings available.
Enclosure Rating: NEMA 4X. Optional general
purpose or explosion-proof.
Switch Type: SPDT snap switch, hermetically
sealed snap switch or mercury switch. Optional
DPDT.
329
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