LS200 & L1100 Series Liquid Level Switches
LS-04004B
Effective 02-04
Catalog Section 15
(00-02-0561)
FWMurphy
Electric Switch
■ Designed for Harsh Gas Compressor Scrubber Applications
■ 304 Stainless Steel Float Operates in 0.5 Specific Gravity
Pending
LS200 Liquid Level Switches with 2” NPT mounting are
float activated to operate an electrical SPDT snap switch
(optional DPDT on LS200 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.
Pneumatic
Switch
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 filter regulator and
Murphy pressure gage which are
recommended for improved 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.
and Heavier Fluids
■ LS200 Series Rated for 2000 psi (13.8 MPa) [138 bar]
Working Pressure
■ Electric and Pneumatic Models Available
■ Improved Design Provides Better Snap Action and
Dependability with Reduced Number of Moving Parts
■ All Models Screw Directly Into the Vessel or Can Be Mounted
Via External Float Chamber
■ Nickel Plated Body to Provide Improved Corrosion Protection
■ Improved Float Connection Thread Design Provides a More
Secure Connection
■ Listed for Class I, Div. 1, Grp. C & D Locations
■ Canadian Registration Number OF1476.2
The Murphy Gas Compressor Scrubber Level System (SLS)
The system provides for
liquid control in gas scrubber
applications, by dumping
liquids to drain and protecting
compressors with a high
liquid level switch. Wetted
metal parts are made to
survive constant use in
corrosive environments.
See Bulletin: SLS-04005B for
more details.
High Level Shutdown Switch
Stainless steel float actuated level switches to alarm
and/or shutdown the equipment.
LS200: 2” NPT pipe connection; Rated 2000 psi
(13.7MPa) [137bar]; Class I, Division 1. SPDT
snap-switch standard. DPDT Optional.
All Stainless Steel available.
Filter/Regulator &
MURPHYGAGE®
Control
Panel
“Instrument
Quality Air/Gas
Supply”
LS200N
Pneumatic level switch without the DVO
and filter regulator.
Warranty
A limited warranty on materials and
workmanship is given with this FWMurphy
product. A copy of the warranty may be
viewed or printed by going to
www.fwmurphy.com/warranty.asp.
Pneumatic Level Control
Float actuated level snap-acting switch
controls pneumatic pressure to open
and close dump valve.
LS200NDVOR: Dump Valve Operator,
pressure regulator, and pressure
indicating MURPHYGAGE.®
Pneumatic Dump
Valves See DVU-01069B
for more details.
Two piece union design with manual valve operator
allows soft plug and hard seat to be replaced
without disassembling outlet piping or scrubber
pipe connection. Diaphragm actuated valves
operate on 30-70 psi (207-483 kPa; 2-5 bar).
FWMurphy
P.O. Box 470248 Tulsa, Oklahoma 74147 USA +1 918 317 4100 fax +1 918 317 4266 e-mail [email protected] website www.fwmurphy.com
FWMurphy
Control Systems & Services Division, P.O. Box 1819; Rosenberg, TX, 77171 USA • 281-633-4500; fax + • 281-633-4588
Electrical
Specifications
DPDT (snap-switch)
Green Grd. Connection
Black N.O.
SPDT (snap-switch)
All Models
Body: Nickel plated steel; Optional 316 stainless steel (meets NACE standard
MR-01-75 for direct exposure to H2S 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
Blue N.C.
Black N.O.
White COM.
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 mm2 x 916 mm)
Yellow COM.
Orange N.C.
Red N.C.
Switch
Rating:
White COM.
Red N.C.
Green Grd. Connection
Switch
Rating:
5 A @ 125-250- 480 VAC
1/2 A @ 125 VDC
1/4 A @ 250 VDC
2A @ 6-30 VDC Resistive
1A @ 6-30 VDC Inductive
10 A @ 125-250 VAC
1/2 A @ 125 VDC
1/4 A @ 250 VDC
10 A @ 6-24 VDC
Inductive/Resistive
Accessories
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]
Float Chamber 15051098
3 in.
(76 mm)
1-11.5 NPT (2 places)
2-11.5 NPT
10.5 in.
(266 mm)
3 in.
(76 mm)
LS200NDVO
Process Connection: 2”NPT
DVO Valve: 3 way N.C. w/ manual operator; all connections 1/8” NPT
1/2-20 UNF-2B
(4 places)
LS200N
3.5 in.
(89 mm)
7.55 in.
(192 mm)
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
Material: Cast Steel, WCB
Shipping Weight: 32 lb. ( 14.5kg).
L1100
2 NPT
Operating
Pressure:
2000 psi (13.8
MPa) [138 bar]
2-7/8 in
(73 mm)
3-5/8 in.
(92 mm)
Approximate Shipping Weights and Dimensions
All models: 6 lb. 10 oz. (3 kg); 14 x 5 x 3-1/2 in. (356 x 127 x 89 mm).
4-1/2 in
(114 mm)
Shipping Weight: 6 lb. ( 2.7kg).
A
B
2.5 in. (64 mm) Hex
Operating Pressure: 2000psi
(13.8 MPa) [138 bar]
Operating Temperature:
400°F (204°C)
Weld Collar (LS200 only) 15050375
Process Connection: 1-1/2” NPT
Pressure Rating: 1500 psi (10.3 MPa) [103 bar]
Float: BUOYGLASTM operates to 0.5 specific gravity; Optional stainless steel to
operate in 0.65 specific gravity
Electrical: SPDT switch
Dimensions
7.01 in.
(179 mm)
Operating
Temperature:
400°F (204°C)
Material: ASTM A105-2
UNS K03504
Float Shaft Extension 15000478
LS200, L1100
12-24 UNC
ø2.19 in.
(56 mm)
C D
12-24 UNC
A
B
C
D
E
LS200
10.16 in. (258 mm)
3.44 in. (87 mm)
ø1.75 in. (44 mm)
2.80 in. (71 mm)
2 NPT
L1100
11 in. (279 mm)
3.50in. (189mm)
ø1.56 in. (40 mm)
3.4 in. (71 mm)
1-1/2 NPT
1/2 NPT
E
Material: AISI 303, UNS-S30300
ø2.19 in.
(56 mm)
Pressure Gage
Exhaust
TOP VIEW
Manual
Valve
Operator
3.53 in.
(90 mm)
4.59 in.
(117 mm)
Nipple
1/8 NPT
x 1/8 NPT
Build a complete model number using the diagram below.
LS200 - ___
2" 11-1/2 NPT
3.73 in.
(95 mm)
3.44 in.
(87 mm)
8.49 in. (216 mm)
NOTE: Refer to LS-04006N for replacement parts.
Options
D = DPDT
K = KALREZ Seals
400 = 400°F (204°C) Service**
SF = Stainless Steel float (L1100 only)
Regulator/Gage
Assembly
3.30 in. (84 mm) min.
ø1.75 in. clearance required for
(44 mm) float movement.
LS200N
3/8 NPT
exhaust
How to Order your Level Switch
Filter/
Regulator
DVO
Signal out
3/8 in
(10 mm)
NOTE: The extension is used with the LS200 only. One extension is
supplied with each unit. Use of additional extensions is not recommended
as they reduce the ability of the unit to operate for the stated specific gravity.
LS200N, LS200NDVO and LS200NDVOR
with Dump Valve Operator,
Pressure Regulator & Gage
20BPG-75
Supply
1 in
(25 mm)
3.63 in. (92 mm)
Base Models
LS200*
LS200N*
LS200NDVO*
LS200NDVOR*
L1100**†
L1100SS†
LS200SS*
LS200NSS*
LS200NSSDVO*
LS200NSSDVOR*
*Pending Canadian Registration Number OF1476.2.
**Not available with DPDT snap-switch.
CAUTION: LS200 series parts are not
interchangeable with the L1200 Series.
† Supplied with BUOYGLASTM float.
LS-04004B page 2 of 2
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