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Where Do I Find Everything I Need for
User’s Guide
Process Measurement and Control?
OMEGA…Of Course!
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TEMPERATURE
Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies
Wire: Thermocouple, RTD & Thermistor
Calibrators & Ice Point References
Recorders, Controllers & Process Monitors
Infrared Pyrometers
PRESSURE, STRAIN AND FORCE
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Load Cells & Pressure Gages
Displacement Transduce
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WARRANTY/DISCLAIMER OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OMEGA’s Warranty adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA’s customers receive maximum coverage on each product. ® OMEGAnet Online Service Internet e-mail www.omega.com info@omega.com If the unit malfunctions, it must be return
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General Description Notes ® The OMEGA FSW-50 Series Flow Switches feature a 15A SPDT switch and an internal screw adjustment which provides continuous switch point adjustment while in operation in-line. Multiple drag disks are supplied with each unit to provide incremental switch point adjustment. Their non- magnetic design makes them ideal for applications where rust is a problem. The FSW-50 comes standard in a plastic/316SS construction. The FSW-50 Series is also available in a special PPS* Ha
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Notes Available Drag Disks The FSW-50 Series Switches come with three different drag disks. The drag disks are sized as follows: DRAG DISK SIZE #1 .5" dia. #2 .83" dia. #3 1.0" dia. The following table lists flow adjustment limits for various pipe sizes relative to Model No. and drag disk size. The moment arm (see Step 3 of FLOW RANGE) is held constant at the maximum value. Decreasing the moment arm, increases the adjustment range. Low Flow Nominal Pipe Nominal High Flow % Increase Model Low Flo
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Relay Switch: SPDT 15A @ 125 or 250 Vac, 10,000,000 Notes operations median Nominal Sensitivity (% Flow Change to Activate Switch): Approximately 10% @ upper end of range; approximately 30% @ lower end of range Differential Pressure Drop Across Unit: (Under normal operating conditions) 1"-3" pipe, less than 0.5 PSI; 4"-10" pipe, negligible Working Line Pressure: For standard construction model: 100 PSIG at 150˚F; for special PPS* , Hastelloy C and Viton construction model: 100 PSIG at 200˚F Max
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ASSEMBLY WARNING THE FSW-50 SERIES SWITCHES EMPLOY AN EXTERNAL SEAL SHAFT (A) A FLEXIBLE ELASTOMER DIAPHRAGM SEAL (B) AND AN INTERNAL FEED THRU SHAFT OR SWITCH ACTUATING ARM (D). ALL THREE ELEMENTS ARE ASSEMBLED AND LOCKED IN PLACE WITH LOCTITE ADHESIVE. TO PREVENT RUPTURE OF SEAL AND LEAKAGE INTO SWITCH AREA, IT IS CRITICALLY IMPORTANT THAT TORQUE NOT BE APPLIED TO SEAL SHAFT (A), FLOAT SHAFT (E) OR DRAG DISK ARM (E) DURING CHANGE 10402-6. GROMMET 10402-5. STRAIN RELIEF NUT OF FLOAT OR DRAG DI
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Thus: 1. Teflon tape thread and tighten the plastic bushing into the pipe or tank fitting. 2. Teflon tape thread and tighten the switch into the PLASTIC bushing by applying a wrench to the hexagon section. Repeat steps 1 and 2 until the ARROW on the body points in the 10398-6. GROMMET 10398-5. STRAIN RELIEF NUT DIRECTION OF FLOW and threads are leak tight. NOTE 10398-2. COVER 3. 4 RETAINING SCREWS (NOT SHOWN) 10398-28. LEADSCREW Plumber’s tools such as pipe wrenches are not recommended. If pos
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6. If the system flow rate is changed, the FSW-50 can be adjusted to Figure 2: Wiring Schematic for power applied to load when the flow is greater than set point (power to load interrupted when flow decreases to below set monitor the new flow rate by turning the adjusting screw in a counterclockwise direction to the minimum flow position and then point). proceeding as in Step 4 above. 7. In the event that the system flow is at the desired rate and the adjustment mechanism runs out of travel, i.e
