Switch-Tek Horizontal and Vertical And Float-Point Float Switches LV20, LV21, LV35, LV36, LH25, LH29, LH35, AV_6 Series 22AUG 08 Rev A Flowline, Inc. 10500 Humbolt Street Los Alamitos, CA 90720 Tel: (562) 598-3015 Fax: (562) 431-8507 www.flowline.
of 14 Switch-Tek Float Series MN801839 22 AUG 08 Rev A
Preface This manual explains how to use the Switch-Tek series of horizontal and vertical floats. Warranty, Service & Repair To register your product with the manufacturer, go to the Flowline website for on-line registration. The website address is as follows: www.flowline.com On-line Warranty Registration can be found under Contact Us in the Navigation Bar along the side of the home page. If for some reason your product must be returned for factory service, contact Flowline Inc.
Warranty Flowline warrants to the original purchaser of its products that such products will be free from defects in material and workmanship under normal use and service for a period which is equal to the shorter of one year from the date of purchase of such products or two years from the date of manufacture of such products. This warranty covers only those components of the products which hare non-moving and not subject to normal wear.
Table of Contents Introduction ..........................................................................................................................6 Technology ..........................................................................................................................6 Installation............................................................................................................................7 Vertical Mounted Switches ..........................................................
Introduction 1. Switches should be installed rigidly so the float or floats are free to move as the liquid level changes. 2. Switches should be mounted in a tank area free of severe turbulence or protected from such turbulence by appropriate and adequate slosh shields. 3. Vertical switch stems should be vertical for best results, but satisfactory operation is possible in most liquids with the stem at up to a 30° angle from vertical. 4.
Installation Operation is stated in the tank dry position. • Vertical Mounted Switches: o NC Operation: SS Floats: Witness mark (round circle) down. Plastic Floats: Magnets up. o NO Operation: SS Floats: Witness mark (round circle) up. Plastic Floats: Magnets down. *Note: LV20-2101, LV20-2201, LV21-1101 and LV21-1201 are not reversible. The LV20-2101 and LV21-1101 are Normally Closed.
Environmental Dimensions LV35-S201 LV35-S401 LV36-S201 LV36-S401 LV36-S501 LV20-1501 LH35-S201 LH25-1201 LH25-1401 LV20-2101 & LV20-2201 LV21-1101 & LV21-1201 8 of 14 Switch-Tek Float Series MN801839 22 AUG 08 Rev A
Dimensions (continued) LH29-1001 AV16-S243, AV26-S243, AV36-S243, AV46-S243 and AV56-S243 AV26-S243 Shown Material Compatibility: o The LV36-S201, LV36-S401, LV35-S201, LV35-S401, LH35-S201 and LV36-S501 are made of 316 stainless steel (316 SS) with 22 AWG, Teflon 24” wire. o The LH25-1201, LH25-2401, LV21-1101, LV21-1201 and LV20-1501 are made of Polypropylene (PP) with 22 AWG, Teflon 24” wire. o The LV20-2101 and LV20-2201 are made of Polytetrafluoroethylene (PTFE) with 22 AWG, Teflon 24” wire.
Electrical Interface Typical Current and Voltage Ratings Watts Voltage 15 240 AC 120 AC 100 DC 24 DC 30 240 AC 120 AC 100 DC 24 DC 60 240 AC 120 AC 100 DC 24 DC 100 240 AC 120 AC 100 DC 24 DC • • • 10 of 14 Current Amps 0.12 0.10 0.30 0.14 0.28 0.07 0.28 0.40 0.50 0.20 0.50 0.40 1.00 0.40 1.00 Note: The ratings at right are for resistive loads only. For inductive loads, maximum switch life will be achieved if appropriate arc suppression is used.
AV_6 Series Float and Wire Key SPST Switches F-Dim E-Dim D-Dim C-Dim B-Dim A-Dim • AV16-S243 (1) Switch BLACK AV26-S243 (2) Switches AV36-S243 (4) Switches AV46-S243 (4) Switches RED RED WHITE BLACK BLACK Total Stem Length RED WHITE BLUE BLACK AV56-S243 (5) Switches RED WHITE BLUE GREEN BLACK Note: Each float will have a pair of colored wires for each level. For example, With a AV56-S243, the B-Dim float will have two black wires as the switch contact.
Specifications Part Number LV36-S201 LV36-S401 Description Float Stem Mat’l Mat’l Max. Max Float Nominal Pressure Oper. SG VA (PSIG) Temp (°C) Standard Full-Size Vertical Fitting 316 SS 316 SS 316 SS 316 SS 200 200 500 500 0.70 0.70 100 100 ¼” NPT ¼” NPT 316 SS 316 SS 316 SS 316 SS 200 200 300 300 0.70 0.70 30 30 1/8” NPT 1/8” NPT LV20-2101 Vertical small Vertical small w/ slosh shield Vertical large Vertical large w/ slosh shield Teflon, NC PFTE PFTE 150 25 0.
Maintenance Maintenance should consist of inspection to see that the float is free to move and not coated with any substance, which would change its weight or volume significantly. If this occurs, the float should be cleaned. This is easily accomplished without disturbing the installation. In addition, the stem may be wiped down to remove any build-up. The only repair possible in the field is replacement of either the float or stem. Dents or nicks on the float are usually of no consequence to operation.
Cleaning procedure: 1. Power: Make sure that all power to the switch, controller and/or power supply is completely disconnected. 2. Switch removal: If necessary, make sure that the tank is drained well below the switch prior to removal. Carefully, remove the sensor from the installation. Remove the outer screen by pushing on the screen and turning is slightly to disconnect is from the bayonet connector so that the float is exposed. 3.
