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Series_NPC_Level_Indicator-by_pulleys_and_counterweight_system

Series_NPC_Level_Indicator-by_pulleys_and_counterweight_system
4Pages

Catalog excerpts

Series_NPC_Level_Indicator-by_pulleys_and_counterweight_system - 1

Level indicators Series NPCIndicator by means of pulleys and counterweight system for liquids • Simple and cheap construction • Suitable for almost all the liquids, even agressive and corrosive fluids • No risk of leakage • Excellent chemical resistance • Measuring range: up to 15 m • Connections: - DN50 EN 1092-1 flanges. Other sizes on request - Solvent weld socket connection • Materials: - Pulleys: PVC - Float: PP, PVC, PVDF, EN 1.4404 (AISI 316L) - External counterweight-indicator: PVC • Local indication by means of external counterweight • Options: - Switches - Electronic transmitter with 4-20 mA analog output for safe or hazardous area (Ex ia IIC T6 protection, ATEX certified). HART, PROFIBUS, FIELDBUS protocols available on request

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Series_NPC_Level_Indicator-by_pulleys_and_counterweight_system - 2

Float Counterweight-indicator Pulleys Tube * Cable * Working principle A PVC counterweight which is joined to a PP, PVC, PVDF or EN 1.4404 float by means of a cable, moves along two protected pulleys and show the tank level externally. Changes in tank level displace the float up and down. This movement is transferred to the external counterweight. The float is always wetted by process fluid. A magnet inside the counterweight allows this instrument to fit alarm switches or electronical transmitters. I Applications • Water treatment plants • Storage of chemicals and petrochemical industry •...

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Series_NPC_Level_Indicator-by_pulleys_and_counterweight_system - 3

Level indicators Series NPC Dimensions Other flange sizes on request * Supplied on request Limit switches Adjustable switch LNPC-AMM Adjustable switch LNPC-APR  SPDT bi-stable micro-switch  SPDT bi-stable reed switch  IP65 coated aluminium housing  Mechanical life: 20 x 10 operations  Suitable for hazardous area, considered as “Simple  Suitable for hazardous area, considered as “Simple Adjustable switch LNPC-AMD NAMUR (EN 60947-5-6) 3.5 mm slot type inductive detector activated by vane, mounted in an aluminium housing.  Power supply: 8 VDC  Hysteresis: ±6 mm  Liquid...

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Series_NPC_Level_Indicator-by_pulleys_and_counterweight_system - 4

Transmitter composed of a resistive sensor based on a reed and resistances chain, mounted on a printed circuit placed inside a guide tube. Not wetted by the process liquid. For 2-wire system, the TR2420 resistance-mA converter is supplied, in an IP67 plastic housing or optionally in an IP65 aluminium housing compact mounted on the sensor head. Variations in level inside the tank move the external NPC counterweight, which by means of magnetic coupling changes the value of the resistance of the resistive sensor in correspondance to the measured liquid level. These variations of resistance are...

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