Related Manuals for Ametek Magnetrol B74
Summary of Contents for Ametek Magnetrol B74
- Page 1 External Cage Displacer Actuated Installation and Operating Manual iquid evel Switches...
- Page 2 In this manual, a warning indicates an of product/service quality available. imminently hazardous situation which, if not avoided, could result in serious injury or death. Copyright © 2021 AMETEK Magnetrol USA, LLC. All rights reserved. Safety Messages Performance specifications are effective with date of issue Follow all standard industry procedures for servicing elec- and are subject to change without notice.
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Page 3: Table Of Contents
External Cage Displacer ctuated Liquid Level Switches Table of Contents 1.0 Introduction 4.2 Agency Approvals ..........11 1.1 Principle of Operation...........4 4.3 Specifications............12 1.2 Operating Cycle ............4 4.3.1 Actuation Levels – Sealed Cage Design..12 2.0 Installation 4.3.2 Dimensions – Sealed Cage Design....14 2.1 Unpacking.............4 4.3.3 Actuation Levels –... -
Page 4: Introduction
Introduction Displacer actuated external cage liquid level switches are designed for service pressures up to 5000 psig (345 bar) and liquids with specific gravities of 0.40 and above. Principle of Operation The design of displacer operated level switches is based upon the principle that a magnetic field will not be affected by non-magnetic materials such as 316 stainless steel. -
Page 5: Critical Alarm Function
Critical alarm function It is recommended that for critical alarm functions, an additional level switch be installed as a high–high or low– low level alarm for maximum protection. Piping Conduit Outlet Figure 3 shows a typical piping installation of a displacer Pressure control to a pressure vessel. -
Page 6: Mounting
Mounting Caution: This instrument is intended for use in Installation Category , Pollution Degree 2 Adjust piping as required to bring control to a vertical posi- tion. Magnetrol controls must be mounted within three ® degrees of vertical in all directions. A three degree slant is noticeable by eye, but installation should be checked with a spirit level on top and/or sides of float chamber. -
Page 7: Preventive Maintenance
5. The switch terminals are located next to the conduit outlet to facilitate wiring. Bring supply wires through conduit outlet. Route extra wire around enclosing tube under the Internal Circuit Internal Circuit (Left) Switch (Right) Switch baffle plate, and connect them to the proper terminals. Refer to the wiring diagram, Figure 5 or 6, or your switch bulletin for this information. -
Page 8: Inspect Switch Mechanisms, Terminals, And Connections Monthly
3.1.2 Inspect switch mechanisms, terminals, and connections monthly 1. Switches should be inspected for excessive wear on actuat- ing lever or misalignment of adjustment screw at point of contact between screw and lever. Such wear can cause false switch actuating levels. See switch mechanism bulletin supplied with control should switch adjustment or replace- ment be necessary. -
Page 9: Reference Information
Reference Information Troubleshooting Usually the first indication of improper operation is failure of the controlled equipment to function, i.e., pump will not start (or stop), signal lamps fail to light, etc. When these symptoms occur, whether at time of installation or during routine service thereafter, check the following potential external causes first. -
Page 10: Check Sensing Unit
4.1.2 Check sensing unit 1. Check to be certain liquid is entering float chamber. A valve may be closed or piping plugged. 2. With liquid in chamber, proceed to check level sensing action by removing switch housing assembly and enclosing tube. Caution: Unit must be normalized to atmospheric pressure before removing enclosing tube. -
Page 11: Agency Approvals
gency pprovals Agency Approved Model Area Classification Class I, Div 1, Groups C & D All with an electric switch mechanism and a housing Class II, Div 1, Groups E, F & G listed as TYPE 4X/7/9 Class I, Div 1, Groups B, C & D All with an electric switch mechanism and a housing listed as TYPE 4X/7/9 Class I, Div 1, Group B Class II, Div 1, Groups E, F &... -
Page 12: Specifications
Specifications 4.3.1 Actuation Levels – Sealed Cage Design inches (mm) Sealed Chamber w/NPT or Socket weld Sealed Chamber w/NPT or Socket weld Side/Bottom Connections Side/Side Connections (B74, H13, H31, H51) (H13, H31, H51) Sealed Chamber Side/Side Flange Connections (B74 only) Sealed Chamber Sealed Chamber Side/Bottom Flange Connections... - Page 13 Specifications 4.3.1 Actuation Levels – Sealed Cage Design inches (mm) Specific Gravity 0.40 0.50 0.60 0.70 0.80 0.90 1.00 Process Model Temp Code °F (°C) 1.30 4.77 2.17 5.00 2.73 5.16 3.13 5.28 3.44 5.37 3.67 5.45 3.86 5.51 (38) (33) (121) (55)
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Page 14: Dimensions - Sealed Cage Design
Specifications 4.3.2 Dimensions – Sealed Cage Design inches (mm) 7.94* 7.94* (201) (201) Plugged Plugged Rotation clearance 7.94 (201) plugged 1" NPT Bottom drain connection Sealed Chamber w/NPT or Socket weld Sealed Chamber w/NPT or Socket weld Side/Bottom Connections Side/Side Connections (B74, H13, H31, H51) (H13, H31, H51) 7.94*... - Page 15 Specifications 4.3.2 Dimensions – Sealed Cage Design inches (mm) Dimensions – Upper Side/Bottom NPT or SW Flanges Model Connection Code Size 1" 3.27 (83) 12.87 (327) 6.38 (162) 15.12 (384) 10.56 (268) 1–1 ⁄ " 8.32 (211) 3.69 (94) 12.56 (319) 6.61 (168) 14.81 (376) 2"...
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Page 16: Actuation Levels - Flanged Top Cage Design
Specifications 4.3.3 Actuation Levels – Flanged Top Cage Design inches (mm) Flanged Top Chamber w/NPT or Flanged Top Chamber w/NPT or Socket weld Side/Bottom Connections Socket weld Side/Side Connections (C74, H15, H32, H52) (H15, H32, H52) Flanged Top Chamber Side/Side Flange Connections (C74 only) Flanged Top Chamber Flanged Top Chamber... - Page 17 Specifications 4.3.3 Actuation Levels – Flanged Top Cage Design inches (mm) Specific Gravity 0.40 0.50 0.60 0.70 0.80 0.90 1.00 Process Model Temp Code °F (°C) 4.38 8.24 5.56 8.74 6.35 9.07 6.92 9.31 7.34 9.49 7.67 9.63 7.94 9.74 (38) (111) (209)
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Page 18: Dimensions - Flanged Top Cage Design
Specifications 4.3.4 Dimensions – Flanged Top Cage Design inches (mm) 7.94* 7.94* (201) Plugged (201) Plugged 7.94 (201) Plugged Bottom 1'' NPT connection drain Flanged Top Chamber w/NPT or Flanged Top Chamber w/NPT or Socket weld Side/Bottom Connections Socket weld Side/Side Connections (C74, H15, H32, H52) (H15, H32, H52) 7.94*... - Page 19 Specifications 4.3.4 Dimensions – Flanged Top Cage Design inches (mm) Dimensions – Upper Side/Bottom NPT or SW Flanges Model Connection Code Size 1" 15.65 (398) 2.77 (70) 22.69 (576) 5.45 (138) 1–1 ⁄ " 15.77 (401) 3.19 (81) 22.81 (579) 18.33 (466) 6.19 (157) 25.38 (645)
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Page 20: Replacement Parts
Replacement Parts 4.4.1 Flanged Cage Parts Identification Item Description Housing cover Housing base Switch mechanism Attraction sleeve Jam nuts Lock washer Enclosing tube E-Tube gasket Flange Flange gasket Studs Nuts Displacer Spring/stem assembly Screw 46-635 External Cage Displacer Actuated Liquid Level Switches... -
Page 21: Model C74
4.4.1.1 Model C74 300# C74 600# C74 Housing cover See below Housing base See below Switch mechanism See below E-tube kit: includes items 7 & 8 089-5933-002 089-5956-001 E-tube gasket 012-1204-001 012-1204-001 Flange gasket 012-1204-019 012-1204-019 Displacer assembly 089-6137-001 089-6138-001 Inconel ®... -
Page 22: Sealed Cage Parts Identification
4.4 Replacement Parts 4.4.2 Sealed Cage Parts Identification Item Description Housing cover Housing base Switch mechanism Attraction sleeve Jam nuts Lock washer Enclosing tube E-Tube gasket Assist spring (B74 only) 46-635 External Cage Displacer Actuated Liquid Level Switches... -
Page 23: Model B74
4.4.2.1 Model B74 Housing cover See below Housing base See below Switch mechanism See below Attraction sleeve (standard) 032-4202-002 Attraction sleeve (sheathed and 304 or 316 stainless steel materials) 032-4502-001 Jam nuts (5 required) 010-2107-001 Lock washer 010-3359-001 Washer (2 required) (not required with standard attraction sleeve) 010-3359-009 Enclosing tube (standard or sheathed) Z32-6302-001... -
Page 24: Model Numbers
Model Numbers 4.5.1 Standard Pressure SPECIFIC GRAVITY AND PRESSURE RATING CODE Pressure Rating at given Temperature – psi (bar) +500 °F ➀ Cage Cage Minimum +100 °F +300 °F (+38 °C) (+149 °C) (+260 °C) Model Style Material S.G. 1480 1315 Carbon Steel (102) - Page 25 Model Numbers 4.5.1 Standard Pressure (continued) ➁ ELECTRIC SWITCH MECHANISM AND ENCLOSURE TYPE 4X/7/9 Aluminum Enclosure Maximum Process ➄ Switch Description ➃ ATEX Temperature °F ( °C) Set Point Class I, Div. 1, Class I, Div. 1, Ex II 2G Groups C &...
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Page 26: High Pressure
Model Numbers 4.5.2 High Pressure Pressure Rating at given Temperature – psi (bar) +500 °F ➀ Cage Cage Minimum +100 °F +300 °F (+38 °C) (+149 °C) (+260 °C) Model Style Material S.G. 4150 3920 — (286) (270) Sealed 5000 5000 4475 (345) - Page 27 Model Numbers 4.5.2 High Pressure (continued) ➁ ELECTRIC SWITCH MECHANISM AND ENCLOSURE Type 4X/7/9 Aluminum Enclosure Maximum Process ➃ Switch Description ➂ ATEX Temperature °F ( °C) Set Point Class I, Div. 1, Class I, Div. 1, Ex II 2G Groups C &...
- Page 28 No claims for misapplication, labor, direct or consequen- tial damage will be allowed. 705 Enterprise Street • Aurora, Illinois 60504-8149 USA 630.969.4000 • info.magnetrol@ametek.com • magnetrol.com Copyright © 2021 AMETEK Magnetrol USA, LLC BULLETIN: 46-635.9 EFFECTIVE: August 2017 SUPERSEDES: March 2012...