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Liquid Displacer Level Switches

Liquid Displacer Level Switches
16Pages

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Liquid Displacer Level Switches Magnetrol's displacement type level switches offer the industrial user a wide choice of alarm and control configurations. Each unit utilizes a simple buoyancy principle and is well suited for simple or complex applications, such as foaming or surging liquids or agitated fluids, and usually costs less than other types of level switches. • Narrow or wide level ranges achieved through multiple switch mechanism capability • Maximum process temperature: +260 °C (500 °F). • Maximum process pressure: 55,1 bar (800 psi). • Displacers adjustable at any point along the suspension • Anti-surge design eliminates the possibility of switch short cycling. • Standard 3 m (10 ft) of suspension cable, included for all • Field adjustable set point and switch differential. • Wide choice of displacer materials. • Wide choice of housings and switch mechanisms • Standard anti-corrosive protection. - Proof-er® ground check - Floating roof models - High pressure models • Suited for SIL 2 loops (DPDT switch) (full FMEDA report Displacer level switches for single or multiple pump control/level alarm • Foaming or surging liquids • Agitated fluids • Sewage handling • Dirty liquids 1 Liquids with solids AGENCY APPROVALS © For CCE approved units, use the ATEX model numbers. © Consult factory for proper model numbers and classifications. Worldwide level and flow solutions

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P R I N C I P L E O F O P E R AT I O N Standard controls Operation is based upon simple buoyancy, whereby a spring is loaded with weighted displacers which are heavier than the liquid. Immersion of the displacers in the liquid results in buoyancy force change, which moves the spring upward. Since the spring moves only when the level moves on a displacer, spring movement (1) is always a small fraction of the level travel between displacers (2). A magnetic sleeve (3) is connected to the spring and operates within a non-magnetic barrier tube (4). Spring movement causes the magnetic sleeve to...

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AVAILABLE SWITCH MECHANISMS For applications with heavy vibration, consult factory for suited switch modules. Max process temperature is specified at 40 °C (100 °F) ambient temperature and for non condensing applications. For more details - see bulletin BE 42-120. For condensing applications, max process temperature is down-rated to 200 °C (400 °F) @ 40 °C (100 °F) ambient. Q and O are the equivalent switch modules for models C10/C15. Type V Type F & 8 Type J & K • Standard blue anti corrosive coating • Housing heater/drain available, consult factory • Standard blue anti corrosive coating •...

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SINGLE SWITCH MODELS Level alarm applications Narrow differential type operate over a narrow level differential band for liquid level alarm simply repositioning suspension cable. varies with liquid specific Pump or valve control Wide differential type These wide differential units are factory calibrated to actuate as a liquid level reaches a given displacer until the level reaches and varies with liquid specific gravity. suspension cable. DUAL SWITCH MODELS Narrow differential type These instruments utilize level and each calibrated differential band. Wide differential type These wide...

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O P E R AT I N G S E Q U E N C E S Model B10 units are available factory calibrated with a choice of switch operating sequence. Five of the most popular sequences are described below. When ordering B10 units, an operating sequence and specic gravity MUST be provided. PUMP CONTROL PLUS ALARM Arrangement N° 1 — ll with high level alarm At the lowest level the pump starts. When the level rises to the middle displacer, the pump stops. If the level continues to rise, the upper displacer actuates the alarm switch which remains actuated until the level drops to the middle displacer. CONTROL OF 2...

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TRIPLE SWITCH MODELS Wide differential type These wide differential type switches are designed to provide three electrically separate control signals in sequence as liquid level These units are factory calibrated with a choice of several sequences Narrow differential type These instruments are factory calibrated to operate over a narrow level band while providing three electrically separate control signals in sequence as liquid level varies.

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OPERATING SEQUENCES Model C10 units are available factory calibrated with a choice of switch operating sequence. Seven of the most popular sequences are described below. When ordering C10 units, an operating sequence and specific gravity MUST be provided. Upper switch diff. adjustable Middle switch diff. adjustable Lower switch diff. adjustable Upper switch diff. adjustable Middle switch diff. adjustable Lower switch diff. adjustable Upper switch diff. adjustable Middle switch diff. adjustable Lower switch diff. adjustable Upper switch diff. fixed Middle switch diff. adjustable Lower switch...

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SELECTION DATA Narrow Differential: for actuation of an alarm or system shutdown - up to 3 setpoints. Wide Differential: switch differential for valve or pump control - up to 3 pump control functions. Dual switch models I- Triple switch models Three Alarms i- Single switch models Dual switch models one alarm + one pump control Specific gravity limits - not for floating roof models. Specific gravity limits - not for floating roof models. Specific grafity limits - not for floating roof models. Consult factory for high temperatures I I EXPEDITE SHIP PLAN (ESP) Several models are available for...

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SELECTION DATA A complete measuring system consists of: 1. Order code for standard models (each unit is factory calibrated to operate on a given specific gravity within the min and the max values listed per model) or 2. Order code for floating roof models. 1. Order code for standard displacer switches BASIC MODEL NUMBER - units for ALARM use ONLY One adjustable set point (fixed narrow differential) Two adjustable set points (fixed narrow differentials) Three adjustable set points (fixed narrow differentials), specify specific gravity of medium separately ■ units for ALARM/PUMP control use...

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Liquid Displacer Level Switches 16Pages

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Liquid Displacer Level Switches
16Pages