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Pneumatic Modulevel ® Liquid level control

Pneumatic Modulevel ® Liquid level control
8Pages

Catalog excerpts

Pneumatic Modulevel ® Liquid level control - 1

Modulevel series P-60 control STEEL FABRICATED MODELS Pneumatic Modulevel® controls are displacement actuated level sensors. They provide output signals in direct proportion to changes in liquid level. Simple, modular design and proven magnetic coupling make Modulevel controls versatile, highly stable, vibration resistant and adaptable to extremes of temperature and pressure. FEATURES * Standard models handle service temperatures from -100°C to +370°C (-150°F to +700°F) and pressure to 294 bar (4265 PSIG). * Stable output signal is unaffected by surface turbulence. Prevents control valve "hunting" and extends valve life. * Controller head may be removed and bench calibrated without dismantling or even depressurizing the tank. * Accurate output signal provided over a wide specific gravity range. * 316 SS displacer and trim. * Easily field calibrated without moving tank liquid level, for reduced installation time and cost. * Controller head rotates 360°, simplifies pneumatic piping hookup. * Pilot relay provides a 4 to 1 amplification of pilot pressure signal to speed valve response. * Built-in visual level indicator is independent of air supply. * Optional pneumatic to current interface transducer for use in electronic control applications. * Optional proportional plus integral control. * Optional differential gap (on-off) control. * Optional Hi-Lo electronic alarm signal provides inexpensive backup alarm. APPLICATIONS Pneumatic Modulevel® liquid level controls are widely used in utility power generation, chemical and petroleum processing operations, such as: • Steam generator feedwater heater regulation • Fractionating column level transmitter • Ethanolamine level transmitter • Vent gas scrubber level control • Drip pot condensate level control • Flash tank level transmitter Worldwide level and flow solutions

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Pneumatic Modulevel ® Liquid level control - 2

Pilot Nozzle Flapper Cam PRINCIPLE OF OPERATION The key elements of the Modulevel pneumatic control are the magnetic coupling, which allows the controller to be mechanically isolated from the sealed sensing unit; the range spring, which dampens the action of the displacer, and the control head, which provides a modulated pneumatic signal in direct proportion to the input from the vertical motion of the displacer. As the liquid level in the vessel increases or decreases, the buoyant displacer rises or falls. This motion, dampened by the action of the range spring to prevent response to the...

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Pneumatic Modulevel ® Liquid level control - 3

Flanged External Cage Models: P63, P64, P65 and P66 PNEUMATIC CONTROLLER HEADS Pneumatic Modulevel® controllers are available in a variety of functions and styles to handle different application requirements. Single function heads Single function heads fulﬁll one of the functions as described below. Single function heads are available with electric limit switches. Limit switches allow separate high/low level alarms separate from the normal function of the unit. Transmitter/receiver heads Transmitter/receiver heads combine the transmitter function with one of the controller functions as...

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Pneumatic Modulevel ® Liquid level control - 4

A complete measuring system consists of: 1. Order code for Pneumatic Modulevel® control 2. Options: Filter regulator to filter air and adapt pressure: order code 006-9501-002. Gauge: order code 006-9501-003. Adjustable displacer hanger: order code 032-3110-004 (std. length 2,5 m (8')), is required when distance between top displacer and mounting flange is > 236 mm (9.30"). Special process connections: consult factory. Gauge glass tappings for caged models only: Specify location and distance between the tappings at the time the order is placed. P/I converters: transform pneumatic output to...

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Pneumatic Modulevel ® Liquid level control - 5

Order code for side mounted models P 6 8 Standard side mounted ﬂoat controller - carbon steel construction with 316 SST ﬂoat 0.60 minimum speciﬁc gravity, max temperature 205°C (400°F) CONTROLLER HEAD Threaded 3" NPT Flanged 4" - 150 lbs RF Flanged 4" - 300 lbs RF Flanged 4" - 600 lbs RF complete order code for Pneumatic Modulevel® Control Pressure bar (PSIG) direct reve

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Pneumatic Modulevel ® Liquid level control - 6

Standard side mount model P68 NOTE: Controller head may be rotated thru 360°. P68 Series with threaded side mounting 1/4" NPT x 51 (2.00) Long Min. Nipple Required Optional Nipple Mounted Filter Regulator Maximum Length to Inside of Tank Maximum 216 Level (8.50) Change P68 Series with ﬂanged side mounting 1/4" NPT x 51 (2.00) Long Min. Nipple Required Optional Nipple Mounted Filter Regulator Maximum Length to Inside of Tank Controller Head Swing Radius Maximum 187 Level (7.38) Change Flange size and Class 4” - 150 lb 4” - 300 lb 4” - 600 lb Number of bolt holes 8 8 8

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Pneumatic Modulevel ® Liquid level control - 7

Top mounted/flanged cage models: P61, P62, P63, P64 and P65 P61 & P62 series top mounting 150, 300 & 600 lb. Class. P63 & P64 series with side/bottom connections 150, 300 & 600 lb. Class. Controller head - side view Outlet Size P65 & P66 series with side/side connections 150, 300 & 600 lb. Class. ® Add. 51 (2.00) for units that will operate on S.G range 0,11 -0,54 or interface service. Add. 79 (3.12) for units that will operate above 200°C (400°F). © Distance "D" without stem extension is 127 (5.00) standard. Can be furnished to min. distance of 76 (3.00).

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Pneumatic Modulevel ® Liquid level control - 8

QUALITY ASSURANCE - ISO 9001 THE QUALITY ASSURANCE SYSTEM IN PLACE AT MAGNETROL GUARANTEES THE HIGHEST LEVEL OF QUALITY DURING THE DESIGN, THE CONSTRUCTION AND THE SERVICE OF CONTROLS. OUR QUALITY ASSURANCE SYSTEM IS APPROVED AND CERTIFIED TO ISO 9001 AND OUR TOTAL COMPANY IS COMMITTED TO PROVIDING FULL CUSTOMER SATISFACTION BOTH IN QUALITY PRODUCTS AND QUALITY SERVICE. ALL MAGNETROL MECHANICAL LEVEL CONTROLS ARE WARRANTED FREE OF DEFECTS IN MATERIALS AND WORKMANSHIP FOR FIVE FULL YEARS (ELECTRONICS ONE FULL YEAR) FROM THE DATE OF ORIGINAL FACTORY SHIPMENT. IF RETURNED WITHIN THE WARRANTY...

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Pneumatic Modulevel ® Liquid level control 8Pages

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Pneumatic Modulevel ® Liquid level control
8Pages