Fisher L2 Liquid Level Controller - Emerson

1 L2 Liquid Level ControllerFisher L2 and L2 Snap Level controllers are part of therugged L2 series of Liquid Level controllers. They use adisplacer type sensor to detect Liquid Level or theinterface of two liquids of different specific controllers are ideal for controlling Level on gasseparators and scrubbers. The reliability of the L2design makes it well suited for Liquid Level applicationsin natural gas production, compression, andprocessing. The device delivers a pneumatic outputsignal to a control/dump valve. The sensor uses athreaded 2 NPT or an NPS 2 CL150 through 1500slip-on flange connection to the More Reliable Control Two-stage proportionalrelay with integral action provides more dependableliquid Level Snap-Acting or Throttling Control One standardcontroller available as either throttling Vibration Resistant Sensor Dynamics O-ringfriction and process pressure sensitivity areminimal.

2 Performance stays constant with processpressure changes and Controller remains NACE Service Ready Standard construction usesmaterials that comply with the requirements ofNACE Field-Configurable Vertical or HorizontalDisplacer Displacer may be adjusted in the field forvertical or horizontal operation without Field-Reversible Output The Controller can beadjusted in the field for direct or reverse actionwithout additional parts. The Controller also hasadjustable gain CL1500 Pressure Rating Sensor assembly isdesigned and specified for ASME CL1500service when using a Polyvinylchloride (PVC)displacer. For PED (97/23/EC) maximum pressure islimited to 200 bar (2900 psig).n Vent-Away Case The ability to pipe away exhaustpermits using natural gas as the operating Easy Maintenance Both the Controller and thesensor can be easily disassembled to inspect theprocess seals and for ControllerD103034X012 Product :L2 March 2020L2 ControllerD103034X012 Product :L2 March 2020 2 SpecificationsAvailable ConfigurationsControllers: Snap-acting or throttlingSensor: Displacer-type Liquid Level sensor formounting to side of tank.

3 Displacer travel istransmitted to Controller by pivotal movement ofdisplacer rodInput SignalType: Liquid Level or Liquid -to- Liquid interfaceLevel Change Required for Full Change in OutputSignal in a Specific Gravity Liquid , with bar (20 psig) Supply Pressure, Direct Action, andStandard 1-7/8 X 12-Inch (48 x 305 mm) VerticalDisplacer with Standard Lever Arm Length:Control ModeMinimum Span LevelChange, mm (Inches)(1)Maximum Span LevelChange, mm (Inches)(1)Throttling102 (4)305 (12)On-off127 (5)305 (12)Snap-acting13 ( )20 ( )Minimum Specific Gravity(2)Minimum specific gravity, or specific gravitydifferential for interface applicationsThrottling Controllers: Controllers: Controllers: SignalPneumatic Jon/off or Jproportional pressuresignalRanges:Throttling: to bar (3 to 15 psig) or bar (6 to 30 psig)On/Off: 0 (off) or full supply pressure (on)Action: Field-reversible between direct (increasinglevel increases output signal) and reverse (increasinglevel decreases output signal)Supply Pressure RequirementsThrottling and On/Off Controller :Throttling: bar (20 psig) for to bar (3 to 15psig) output signal and bar (35 psig) for to (6 to 30 psig) output signalOn/Off: Any desired pressure between and bar(20 and 50 psig)Snap-Acting Controller .

4 Any desired pressurebetween and bar (20 and 50 psig) direct, and bar (20 and 35 psig) reverseDo not use supply pressure below bar (20 psig)Supply Pressure MediumAir or Natural GasSteady-State Air Consumption(3)Throttling Controller : normal m3/hr ( scfh)at bar (20 psig) supply pressureSnap-Acting Controller : normal m3/hr ( scfh) at bar (20 psig) supply pressure or normal m3/hr ( scfh) at bar (35 psig)supply pressure in tripped condition; air consumptionincreases during tripSensor to Vessel ConnectionJ2 NPT threaded or JNPS 2 CL150 through 1500slip-on flange connection(4) Controller ConnectionsSupply: 1/4 NPT internal located on the bottom of thecaseOutput: 1/4 NPT internal located on the top of thecaseCase Vent: 1/4 NPT internal with vent screenassembly located on the back of the caseStandard Displacer Size48 x 305 mm, 541 cm3 (1-7/8 x 12 inches, 33 in3)Maximum Displacer Insertion Length(5)Standard lever arm length plus one 6-inch extension,horizontal or verticalDisplacer Material and Maximum Sensor WorkingPressure(6)PVC Displacer.

5 Consistent with CL1500 pressuretemperature ratings per ASME up tomaximum pressure of bar (3750 psig)For PED (97/23/EC) maximum pressure limited to 200bar (2900 psig)S31603 SST Displacer: CL600 pressure temperatureratings per ASME up to maximum pressure bar (1440 psig)Note: For slip-on flange connection, maximum sensorworking pressure must be consistent with the flangeratings-continued-L2 ControllerD103034X012 Product :L2 March 2020 3 Specifications (continued)Displacer Material and Sensor TemperatureLimits(6)PVC Displacer: -29 to 79_C (-20 to 175_F)S31603 SST Displacer: -40 to 204_C (-40 to 400_F)Operative Ambient Temperature Limits(6) Controller : -29 to 71_C (-20 to 160_F)Standard Supply, and Output Pressure GaugeIndicationsTriple scale gauges in 0 to 60 psig/0 to MPa/0 to barConstruction MaterialsController:Case and Cover: Marine grade aluminumRelay Body: ThermoplasticRelay Trim: Stainless steel, nitrileSpan Levers: Stainless steelSensor:Sensor Body: LCCO-Rings: FluorocarbonPivot Assembly: Stainless steelDisplacer: JPolyvinylchloride (PVC) or JS31603 SSTS ensor Spring: Stainless steelDimensionsRefer to figure 1 Hazardous Area ClassificationComplies with the requirements of ATEX Group IICategory 2 Gas and DustMeets Customs Union technical regulation TP TC012/2011 for Groups II/III Category 2 equipmentII Gb c T*XIII Db c T*XNOTE.

6 Specialized instrument terms are defined in ANSI/ISA Standard - Process Instrument Any deviation from the standard construction described in the input signal specification above requires special displacer sizing considerations. Contact your Emerson sales office for Minimum specific gravity values apply to both horizontal and vertical displacers with standard lever arm length (see dimension in figure 1).3. Normal m3/hr-Normal cubic meters per hour (0_C and bar, absolute). Scfh-Standard cubic feet per hour (60_F and psia).4. Converting from a threaded NPT connection to a flange connection is to be done by the end-user. Refer to Converting a Threaded NPT Connection to a Flange Connection instruction ManualSupplement (D103277X012), available at or from your Emerson sales Standard lever arm length.

7 See figure The pressure and temperature limits in this document and any applicable code limitations should not be ControllerD103034X012 Product :L2 March 2020 4 Figure 1. DimensionsGE08174-A248( )155( )191( )Notes: 1 Dimensions include one standard 152 mm (6-inch) extension. Contact yourEmerson sales office for optional extension lengths. 2 Dimensions valid with standard displacers (INCH)335( )194( )287( )48( )48( )302( )318( )589( )2302( )1 LEVER ARMNPT OR SLIP-ON1/4-18 NPT SUPPLY CONNECTION105( )22122 Emerson Automation Solutions Marshalltown, Iowa 50158 USAS orocaba, 18087 BrazilCernay, 68700 FranceDubai, United Arab EmiratesSingapore 128461 contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are notto be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability.

8 All sales aregoverned by our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of suchproducts at any time without 2001, 2020 Fisher Controls International LLC. All rights is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions, Emerson , and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective Emerson , Emerson Automation Solutions, nor any of their affiliated entities assumes responsibility for the selection, use or maintenanceof any product. Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.