Murphy LS200 Series User manual

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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.
AB
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 pressure gage which is 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.
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 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
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
A10.16 in. (258 mm) 11 in. (279 mm)
B3.44 in. (87 mm) 3.50in. (189mm)
C1.75 in. (44 mm) 1.56 in. (40 mm)
D2.80 in. (71 mm) 3.4 in. (71 mm)
E 2 NPT 1-1/2 NPT
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LS-04006N page 2 of 4
Direct Installation into the Wall of the
Pressure Vessel
1. Determine that the float travel is not
obstructed by the coupling in the
vessel wall, internal baffles, etc.
Do NOT use more than one
float shaft extension P/N
15000478.
2. BE SURE that the float and
extension are tight.
3. Before installing the level
switch, use of a pipe thread
sealant is recommended. Screw
the unit directly into the threaded
connection in the wall of the pressure
vessel.
4. For LS200 and L1100 be sure that the electrical connection is
positioned at the bottom.
5. For LS200N the 1/8” NPT pneumatic connection should be on top
(the 3/8” NPT vent connection should be on the bottom) for
service on a “Trip on Rising” application. The LS200N can be
rotated 180° for service on a “Trip on Falling” application.
6. Make the electrical wiring connections according to
appropriate wiring diagrams for the alarm or shutdown
system to be used. The electrical connection is 1/2”-14 NPT.
7. BE SURE all electrical connections are insulated and the
cover is fully installed before reconnecting electrical power.
8. BE SURE all pressure connections are tight before
pressurizing the system.
Installation with a Weld Collar
1. The weld collar, P/N 15050375, must be welded into the wall
of the pressure vessel according to
code standards and good
welding practices.
2. Follow above instructions
for installation directly
into the wall of the
pressure vessel.
3. NOTE: Weld collar
15050375 can be used
ONLY with model LS200.
Installation Using
External
Float Chamber 15051098
1. Install the float chamber 15051098 on the outside wall of the
pressure vessel using 1” NPT piping or use the mounting
surface with a bracket. Position the 2” NPT threaded
connection at the height where you want the level switch to
operate. The 2” NPT threaded connection must be positioned
away from the tank wall.
2. A tee and bleed valve are typically installed at the bottom of the lower 1
inch pipe riser to allow draining of the float chamber for servicing or
replacement.
NOTE: A typical installation with Blocking and
Bleed valves is shown at right.
3. Install the LS200 or
LS200N/NDVO/NDVOR
in the 2” NPT connection of
the float chamber.
BE SURE float travel
is not restricted and that
the float is tight onto
the float shaft.
4. To complete installation and
wiring, follow the instructions for
mounting directly into wall of
the vessel and for wiring.
Pneumatic Models
1. All pneumatic models
operate on the vent
principle.
The pneumatic signal
source must be clean and
dry“Instrument
Quality”air or natural
gas.
The input pneumatic signal
must be regulated between 30
and 70 psi (207-483 kPa) [2 -4.83
bar].
If produced gas is used as the signal source,
it should be taken after gas passes through the final scrubber.
A suitable filter must be positioned before the LS200NDVO to prevent
liquids and/or particulates from entering the dump valve operator.
NOTE: Check filter periodically for wear and tear and elements
that hamper the flow of the pneumatic signal.
2. All pressure connections must be tight and maintained tight so as
not to leak air/gas.
3. Valve seat adjustment can be made if air/gas begins to leak. Care
should be taken when adjusting as only slight movement is necessary
to stop the leakage; excessive force will bind the seating mechanism.
See the instruction below for adjustment.
PRESSURE VESSEL INSTALLATION: LS200, LS200N and L1100
TRIP CAM
(non adjustable)
CAM DRIVER
(non adjustable)
SCREW
ACTUATOR ARM
ADJUSTABLE ORIFICE
Turn left until air leakage stops.
CAUTION: Only slight adjustment
(1/32 turn is needed) excessive
adjustment will lockup mechanism.
After adjusting, make sure float moves
without obstruction.
FLOAT SHOWN
IN THE DOWN POSITION
FLOAT SHOWN
IN THE UP POSITION
SEAT
TRIP CAM
(non adjustable)
CAM DRIVER
(non adjustable)
SCREW
ACTUATOR ARM
Manual Valve Operator
Manual Valve Operator
SEAT
Dump Valve
Operator Assembly
p/n 15010216
LS200N
MURPHYGAGE
®
Filter/Regulator
RECOMMENDED
Pneumatic
Signal
Tank
Tank Wall
Weld Collar
LS200
Tank
Wall
LS200
Level
Switch
Tank
Float
Chamber
Block
Valves
Level
Switch
Tee
Bleed
Valve
CAUTION: USE “NON SPARKING TOOLS.
CAUTION: Avoid excessive
teflon tape as excess will
inhibit proper operation.
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LS-04006N page 3 of 4
REPLACING AND INSTALLING THE DVO ASSEMBLY
Tools Needed: Strap or pipe wrench, 9/16" Hex wrench, tubing
cutters and benders and the appropriate tools for the fittings.
1. Block off and bleed the instrument gas pressure supply to the
LS200NDVO/DVOR.
2. Remove the tubing between the LS200NDVO/DVOR and the
scrubber dump valve, and remove the supply gas tubing
(regulator [-R-] if used).
3. Remove the LS200NDVO/DVOR from the vessel (optional).
4. If the LS200NDVO/DVOR was removed from the vessel,
mount it in a suitable vise on a work bench (if possible).
5. Using the proper tools, disconnect the Inlet, Outlet, and Exhaust
fittings from the existing DVO (see fig. 1). You will re-connect
these to the new DVO in a later step.
NOTE: The following steps must be done with the DVO in the
upright position (on top of the LS200NDVO).
6. Remove the LS200NDVO/DVOR cover. The use of a strap
wrench or a pipe wrench may be needed.
7. With a 9/16" hex wrench loosen the hexhead bolt on top of the
DVO and remove the existing DVO from the body.
8. Ensure that the adjustable orifice is fully raised up to ensure
when inserted into the body that the actuator arm is not bent.
See fig 2.
9. Insert the new DVO onto the body. The DVO manual valve
operator must face away from the vessel.
10. With the DVO aligned over the hex on the LS200NDVO body,
tighten the valve using the 9/16" hex wrench. You may need to
hold the DVO while tightening to keep it from rotating. See fig 3.
11. The pneumatic input signal should be regulated between 30 and
70 psi for proper setting of the adjustable orifice. With the float
in the down position adjust the adjustable orifice down until it
touches the seat (see fig 4). If the DVO is still leaking make
slight adjustments (1/32 turn). Excessive adjustments will lock
up mechanisms. After adjusting make sure float moves freely
up and down.
12. Replace the LS200NDVO/DVOR cover.
13. Using the appropriate tools re-install the Inlet, Outlet, and
Exhaust fittings to the new DVO (see fig 1). Thread sealant is
recommended but care should be used to not allow excess to
enter valve.
14. If the LS200NDVO/DVOR was removed from the vessel re-
install it at this time. Thread sealant is recommended.
15. Connect to the Inlet, Outlet, and Exhaust fittings. According to
installation drawings.
When replacing/installing the DVO assembly, tubing and fitting modifications may be required. We suggest removing the LS200NDVO/DVOR
from the vessel. Relieve pressure from the vessel or use block valves before removing the LS200NDVO/DVOR.
CAUTION: Ensure that the actuator arm is not bent
during assembly.
CAUTION: LS200 series parts are not
interchangeable with the L1200 Series.
CAUTION: LS200
series parts are not
interchangeable with
the L1200 Series.
NOTE: Clean,dryinstrument quality gas should be used.
Use of filters will improve service life and reliability.
Outlet
Inlet
Exhaust
Figure 4
Figure 2
Replacing and Installing the DVO Assembly
For Models LS200NDVO & LS200NDVOR
Adjustable
Orifice
Figure 3
Orifice
Adjustment
Cam
(Not Adjustable)
Actuator Arm
(Not Adjustable)
Manual Valve
Operator
Figure 1
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LS-04006N page 4 of 4
Order by part number designation.
ACCESSORIES
3-5/8 in.
(92 mm)
2-7/8 in
(73 mm)
2 NPT
4-1/2 in
(114 mm)
10.5 in.
(266 mm)
1-11.5 NPT (2 places)
1/2-20 UNF-2B
(4 places)
3 in.
(76 mm)
3.5 in.
(89 mm) 7.01 in.
(179 mm)
2-11.5 NPT
7.55 in.
(192 mm)
3 in.
(76 mm)
Material: Cast Steel, WCB
12-24 UNC
3/8 in
(10 mm)
1 in
(25 mm)
12-24 UNC
Material: AISI 303, UNS-S30300
2-1/16 in
(52 mm) 1-1/16 in
(27 mm)
2-1/2 in
(64 mm)
2 NPT
1 NPT
15050375: Weld Collar
15051098: External Float Chamber
Operating Pressure: 2000 psi (13.8 MPa) [138 bar]. Operating Temperature: 400°F (204°C).
15000478: Float Shaft Extension
55050617: DVU150/DVU175 Adapter Bushing
Material: 2-1/2 Hex
bar stock C.R.S
Operating Pressure: 2000 psi (13.8 MPa) [138 bar].
Operating Temperature: 400°F (204°C).
ELECTRICAL REPLACEMENT PARTS
Black N.O.
Red N.C. White COM.
Green Grd. Connection Black N.O.
Red N.C. White COM.
Green Grd. Connection
Blue N.C.
Orange N.C. Yellow COM.
SPDT (Snap Switch)
DPDT (Snap Switch)
Switch Rating: 10 A @ 125-250 VAC
1/2 A @ 125 VDC
1/4 A @ 250 VDC
10 A @ 6-24 VDC
Inductive/Resistive
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
Order by part number designation.
LS200*
15000479: Stainless Steel float for LS200
15000124: SPDT snap switch assembly
15010268: LS200 counter balance assembly
15000478: Float shaft extension
LS200N
15000479: Stainless Steel float for LS200N
15051133: Valve stem
15010266: Counter balance assembly
LS200NDVO and LS200NDVOR
55050621: Regulator only
05706499: 20BPG-D-75 Pressure MURPHYGAGE®
0-75 psi (517 kPa) [5.17 bar]
15010267: Assembly (LS200N DVO Assembly)
L1100
15000893: BUOYGLASTM float
15000937: Stainless Steel float
15000124: SPDT snap switch assembly
15000213: Counter balance assembly
15000892: Float shaft extension
*To maintain hazardous location listings, all other repairs must be made by the factory.
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.
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.
®
CONTROL SYSTEMS & SERVICES DIVISION
P.O. Box 1819; Rosenberg, Texas 77471; USA
[phone] fax [phone]
e-mail [e-mail]
MURPHY DE MEXICO, S.A. DE C.V.
Blvd. Antonio Rocha Cordero 300, Fracción del Aguaje
San Luis Potosí, S.L.P.; México 78384
[phone] fax [phone]
Villahermosa Office [phone]
e-mail [email protected]
www.murphymex.com.mx
FRANK W. MURPHY, LTD.
Church Rd.; Laverstock, Salisbury SP1 1QZ; U.K.
[phone] fax [phone]
e-mail [e-mail]
www.fwmurphy.co.uk
MURPHY SWITCH OF CALIFORNIA
41343 12th Street West
Palmdale, California 93551-1442; USA
[phone] fax [phone]
e-mail [email protected]
www.murphyswitch.com
In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.
MACQUARRIE CORPORATION
1620 Hume Highway
Campbellfield, Vic 3061; Australia
[phone] fax [phone]
e-mail [email protected]
FWMurphy
P.O. Box 470248
Tulsa, Oklahoma 74147 USA
[phone]
fax [phone]
e-mail [e-mail]
www.fwmurphy.com
R
E
G
I
S
T
E
R
E
D
USA–ISO 9001:2000 FM 28221
UK–ISO 9001:2000 FM 29422
Printed in U.S.A.
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