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| RESISTS ATTACK BY SULFIDES |
| The stainless steel and welds in Wallace & Tiernan Products Armored Purge Meters conform to NACE Standard MR-01-75 covering hydrogen sulfide-resistant surfaces. |
| ACCURATE GAS METERING |
| A snubber on the float causes readings to steady out quickly, gives true readings down to atmospheric pressures. |
| RUGGED CONSTRUCTION |
| Choice of carbon or 316 stainless steel with Buna N, TFE, or 321 stainless 0-rings gives corrosion resistance and reliable operation to 1500 psi and 800° F (600° F with flow switch). A heavy stainless sheath encloses the scale tube, which is sealed at both ends by 0-rings. |
| BUILT-IN BACKCHECK |
| An 0-ring at the top of the float seals against the seat to prevent backflow through the meter. |
| EASY TO CLEAN |
| A port in the bottom of the meter body makes cleaning easy. |
| CHANGE FLOATS OR SCALES |
| To change capacity, a different float is inserted without removing the meter from the line. Scale tubes carry gallon and percent scales. Either can be exposed by loosening a cap screw and turning the tube. |
| POWERFUL MAGNETIC LINKAGE |
| An indicating follower ring slides on the precision inside bore of the scale tube. This low friction travel and a powerful bond between the ring and the float magnet makes for immediate response to flow changes. |
| FLOW SWITCHES |
| This compact option gives reliable high and/or low flow switching. The flow switch contains a powerful rotating magnet which responds linearly to float position. Its switches are long-life, hermetically sealed reed types. Almost frictionless rotation of the switch magnet and its powerful bond with the float magnet give a dependable magnetic coupling. Even under sudden flow surges, switching remains reliable. The switch is available in hazardous-location (Series 5500) and general purpose (Series 5600) arrangements and is rated 10 amperes at 120 volts ac. No extensions, no interference with vertical piping. Switches, easily set to open or close on increasing or decreasing flow without removing alarm cover. A screwdriver adjustment sets each switch independently over 0-100% of flow range. Series 5500 Hazardous-location (as defined in Article 500, NEC) Flow Switch is UL listed for Class I, Division 1 and 2, Group C and D and Class II, Division 1 and 2, Group E, F, and G. |
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