LS200, LS200N and LS200NDVOR Series Liquid Level Switches Installation and Operations Manual 00-02-0671 2014-08-27 Section 15
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. The latest version of this manual can be found at www.fwmurphy.com. CAUTION: LS200 Series parts are not interchangeable with other Murphy liquid level products. Damage caused by using incorrect parts is not covered by our Limited Warranty. Please read the following information before installing.
Table of Contents Product Information...................................................................................................................1 Features .......................................................................................................................1 LS200 ...........................................................................................................................1 LS200NDVOR ......................................................................................
(THIS PAGE INTENTIONALLY LEFT BLANK)
Product Information Features Listed for Class I, Div. 1, Grp. C & D locations Canadian Registration Number OF1476.2 Minimum Allowable Specific Gravity for LS200 Table 1 LS200 Minimum Allowable Specific Gravity Model Float Extension Pressure Specific length Gravity (inch) (psi) 0 0.55 LS200 1 2000 0.7 6 1 0 0.63 LS200NDVO 1 2000 0.73 6 1.02 *Note: The min.
LS200NDVOR LS200NDVOR is a float-activated, pneumatic-vent level device used to operate dump valves or similar devices. The LS200NDVOR provides a 2-inch NPT mounting with a pneumatic output for interfacing with pneumatic devices such as our Murphy pneumatic dump valve or with other pneumatic instrumentation. Pneumatic media devices require clean, dry, instrument-quality air or gas.
LS200NDVO Pneumatic level switch with 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. LS200NDVO pneumatic level switch with dump valve operator LS200N Pneumatic level switch without the DVO and filter regulator.
Pressure Vessel Installation: LS200 and LS200N Direct Installation into the Wall of the Pressure Vessel CAUTION: Determine that the float travel is not obstructed by the coupling in the vessel wall, internal baffles, etc. Refer to tables 1, 2, 3 and 4 for application data. 1. Make certain the float and extension are tight. 2. 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. 3.
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. NOTE: Weld collar 15050375 can be used ONLY with model LS200. Installation Using Murphy External Float Chamber 1.
Installation and Adjustment for Pneumatic Models 1. All pneumatic models operate on the vent principle. The pneumatic signal source must be clean, 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.
Replacing and Installing the DVO Assembly NOTE: 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. Models LS200NDVO & LS200NDVOR NOTE: Clean, dry instrument-quality gas should be used. Use and regular maintenance of filters will improve service life and reliability.
Figure 1 - DVO Figure 2 – Adjustable Orifice CAUTION: Ensure that the actuator arm is not bent during reassembly 10. With the DVO aligned over the hex on the LS200NDVO body, tighten the valve using the 9/16-inch hex wrench. You may need to hold the DVO while tightening to keep it from rotating. 11. The pneumatic input signal should be regulated between 30 and 70 psi for proper setting of the adjustable orifice.
Figure 4 – Orifice Adjustment with float in down position Figure 3 – DVO manual valve operator 14. Connect to the inlet, outlet and exhaust fittings according to installation drawings. Electrical Replacement Parts Order by part number designation.
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) Accessories 15050375: Weld Collar Operating pressure: 2000 psi (13.8 MPa) [138 bar]. Operating temperature: 400°F (204°C).
051098: External Float Chamber Operating pressure: 2000 psi (13.8 MPa) [138 bar] Operating temperature: 400°F (204°C). 15700799: Series 100 External Float Chamber Operating pressure: 2000 psi (13.8 MPa) [138 bar] Operating temperature: 400°F (204°C). 15000478: Float Shaft Extension for the LS200 CAUTION: Use of 1-inch extension requires additional clearance. Refer to Tables 1, 2, 3 and 4 for application data.
The Murphy Gas Compressor Scrubber Level System (SLS) Section 15 2014-08-27 00-02-0671 - 12 -
Specifications All Models Listed for Class I, Div. 1, Grp. C & D locations Canadian Registration Number OF1476.2 Body: Nickel-plated steel; optional 316 stainless steel Float: 304 stainless steel Pressure rating: 2000 psig (13.8 MPa) [138 bar] (LS200 models only) O-ring: Viton Process connection: 2” NPT Temperature rating: -20 to 300°F (-29 to 149°C) LS200 Electrical: SPDT std. (see Electrical section for configuration/rating). Wiring: 18 AWG x 36 in. (1.0 mm2 x 916 mm) LS200NDVOR DVO valve: 3-way N.C.
NOTES
NOTES
