Specifications

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LS-04006N page 1 of 4
Installation for LS200, LS200N LS200NDVOR Series
and L1100 Liquid Level Switches
LS-04006N
Effective 02-04
Section 15
(00-02-0563)
Please read the following instructions before installing. A visual
inspection for damage during shipping is recommended before mounting.
GENERAL INFORMATION
WARNING
BEFORE BEGINNING INSTALLATION OF THIS MURPHY PRODUCT
✔ Disconnect all electrical power to the machine.
✔ Make sure the machine cannot operate during installation.
✔ Follow all safety warnings of the machine manufacturer.
✔ Read and follow all installation instructions.
✔ OBSERVE all pressure and electrical ratings and require-
ments for the devices and the operating environment.
✔ BE SURE all pressure HAS BEEN REMOVED from the
vessel before opening any pressure connections.
A
B
C
E
D
ø2.19 in.
(56 mm)
1/2 NPT
3.63 in. (92 mm)
2.5 in. (64 mm) Hex
LS200
3.53 in.
(90 mm)
Signal out
Manual
Valve
Operator
TOP VIEW
DVO
LS200N
Supply
Exhaust
8.49 in. (216 mm)
ø2.19 in.
(56 mm)
2" 11-1/2 NPT
3/8 NPT
exhaust
3.73 in.
(95 mm)
4.59 in.
(117 mm)
ø1.75 in.
(44 mm)
3.30 in. (84 mm) min.
clearance required for
float movement.
3.44 in.
(87 mm)
20BPG-75
Pressure Gage
Filter/
Regulator
Nipple
1/8 NPT
x 1/8 NPT
Regulator/Gage
Assembly
LS200N, LS200NDVO and LS200NDVOR
with Dump Valve Operator,
Pressure Regulator and Gage
Description
LS200
Liquid Level Switches with 2” NPT mounting are float
activated to operate an electrical SPDT snap switch (optional DPDT on
some models) for alarm or shutdown of an engine or electric motor. The
LS200 screws directly into the vessel wall and can be used with a weld
collar or external float chamber. L1100 models (1-1/2” NPT) are
available.
LS200NDVOR is a float-activated, pneumatic-vent level device
used to operate dump valves or similar devices.
The LS200NDVOR provides a 2” NPT mounting with a pneumatic snap
action output for interfacing with pneumatic devices such as our DVU
scrubber dump valve or with other pneumatic instrumentation. This
unit is supplied with a pressure regulator and filter and Murphy
20BPG pr
essure gage which is r
ecommended for impr
oved system
life and trouble-free operation.
LS200NDVO
Pneumatic level switch with snap action Dump Valve Operator (DVO)
without the Pressure Regulator for those applications where the system
provides a filter regulator for “instrument quality” air or gas as the control
medium.
LS200N
Pneumatic level switch without the DVO and filter regulator.
All Models
Body: Nickel plated steel; Optional 316 stainless steel (meets NACE standard
MR-01-75 for direct exposure to H
2
S service
Float: 304 Stainless steel to operate in 0.5 specific gravity or
heavier fluids (LS200 Series models only)
Pressure Rating: 2000 psig (13.8 MPa) [138 bar] (LS200 models only)
O-Ring: Viton
LS200
Process Connection: 2”NPT
Temperature Rating: -20 to 300°F (-29 to 149°C)
- Optional -20 to 400°F (-29 to 204°C): (not available with DPDT).
Electrical: SPDT std. (see “Electrical” section for configuration/rating).
Wire: 18 AWG x 36 in. (1.0 mm
2
x 916 mm)
LS200NDVOR
Process Connection: 2”NPT
DVO Valve: 3 way N.C. w/manual operator; all connections 1/8” NPT
(minimum 30 psig required)
Filter/Pressure Regulator Set:
- Regulator: 0 to75 psig (0 to 517 kPa) [0 to 5.17 bar] range
- Maximum input pressure: 300 psig (2.07 MPa) [20.7 bar]
LS200NDVO
Process Connection: 2”NPT
DVO Valve: 3 way N.C. w/ manual operator; all connections 1/8” NPT
LS200N
Process Connection: 2”NPT
Vent Valve: 2 way N.C. snap action w/ 1/16 in. (2 mm) orifice and Viton seat;
Inlet: 1/8” NPT ; Outlet: 3/8” NPT
L1100
Process Connection: 1-1/2” NPT
Pressure Rating: 1500 psig (10.3 MPa) [103.2 bar]
Float: BUOYGLAS
TM
operates to 0.5 specific gravity;
Optional stainless steel to operate in 0.65 specific gravity
Electrical: SPDT switch
CAUTION
LS200 Series parts are not interchangable with other liquid
level products. Damage caused by the above mentioned
is not covered by our Limited Warranty.
LS200 L1100
A 10.16 in. (258 mm) 11 in. (279 mm)
B 3.44 in. (87 mm) 3.50in. (189mm)
C 1.75 in. (44 mm) 1.56 in. (40 mm)
D 2.80 in. (71 mm) 3.4 in. (71 mm)
E 2 NPT 1-1/2 NPT
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latest version