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Summary of Contents for Igema NA7
- Page 1 Magnetic level gauge Version 03/2025 D-06-B-63275-EN-00 Installation and operating instruction (English translation)
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Page 2: Table Of Contents
Table of Contents About this document Introduction __________________________________________________ 1 Product identification and rating plate ______________________________ 2 Related documents ____________________________________________ 3 Marking of safety precautions ____________________________________ 4 Copyright ____________________________________________________ 4 Safety Instructions Requirements for personnel ______________________________________ 5 Safety at work ________________________________________________ 5 Intended use of the gauge _______________________________________ 7 Damage to the product _________________________________________ 8 Contents of the packaging... - Page 3 Commissioning Before commissioning _________________________________________ 21 Align indicator discs / rollers_____________________________________ 21 Commissioning at the same time as the boiler_______________________ 22 Commissioning under pressure and temperature loads ________________ 22 Servicing Preventive maintenance _______________________________________ 23 Release pressure _____________________________________________ 23 Emptying the attachment housing for cleaning ______________________ 24 Remove the float for cleaning ___________________________________ 25 Case of damage 10.1...
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Page 5: About This Document
About this document 1.1 Introduction The Installation and operation instruction are part of the Magnetic level gauge NA7. It must be made available to the responsible departments "Incoming goods, transport, assembly, commissioning and maintenance". The Installation and operation instruction must be stored in such a way that the qualified person has access to them at all times. -
Page 6: Product Identification And Rating Plate
Magnetic level gauge. The Installation and operation instruction belongs to the Magnetic level gauge of the type NA7. Additions that are entered after the description and describe the design of the Magnetic level gauge (e.g.-80) do not release these Installation and operation instruction from belonging to the Magnetic level gauge. -
Page 7: Related Documents
MRK110 transmitter, as well as the data sheet for the M510 limit switch and the indication bars must be observed. Document number/ Product QR-Code Link 62825 Drain valves www.igema.com/document/62825 Transmitter 52053 MRK 110-S, MRK 110-SIL, www.igema.com/document/52503 MRK 110-Ex-SIL Limit switch 50380 M510-1-60 / 76 www.igema.com/document/50380... -
Page 8: Marking Of Safety Precautions
This Installation and operation instruction contains texts and drawings that may not be reproduced, distributed or otherwise communicated in whole or in part without the express permission of the manufacturer. The copyright of the operating instructions remains with: Igema GmbH Antwerpener Str. 1 48163 Muenster Germany Violations oblige you to pay compensation. -
Page 9: Safety Instructions
Only trained electricians may commission electrical components and carry out maintenance work on them. Igema GmbH can be commissioned for the installation and maintenance. AUTION Risk of injury due to external influences External influences can lead to injuries in the absence of protective equipment •... - Page 10 AFETY NSTRUCTIONS ARNING Risk of injury due to leaking medium Inflammatory, irritating and harmful substances can escape from the gauge and lead to skin injuries and burns. This danger is also to be expected in the case of an unpressurised cooled system.
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Page 11: Intended Use Of The Gauge
AFETY NSTRUCTIONS AUTION Risk of injury due to unsecured working area An unsecured working area can endanger working and bystanders. • Ensure safe access. • Delimit and mark the secured working area. • Sufficiently illuminate the working area. Risk of injury due to heavy loads There is a risk of injury when handling large and/or heavy gauges. -
Page 12: Damage To The Product
AFETY NSTRUCTIONS 2.4 Damage to the product OTICE Property damage caused by incorrect storage and transport Incorrect transport and storage can cause damage to the gauge. • Avoid bumps and hard setdown. • Store the gauge protected from environmental influences and in a dry place. •... -
Page 13: Contents Of The Packaging
ONTENTS OF THE PACKAGING Contents of the packaging 3.1 Included 1. NA7 The Magnetic level gauge will be delivered as a pre-assembled unit, unless otherwise contractually agreed: • Surface-mounted housing with indication bar • Float and flange seal (attached to the outside of the display body) •... -
Page 14: System Description
YSTEM ESCRIPTION System Description 4.1 Function The magnetic level gauge is an indirect level indicator that is used on steam boilers and tanks. The magnetic level gauge works on the physics law of communicating tubes. The float floats in the add-on housing and acts magnetically on the discs (AL2-G, AL3-G) or rollers (ALG- R) in the indication bar. -
Page 15: Construction
ONSTRUCTION Construction Screw plug Drain plug / drain valve Sealing ring 10 Sealing ring Mounting housing 11 Water level mark (chap. 11.2) Connection flanges / connection 12 Rating plate (chap. 1.2) pieces Float 13 MRK transmitter (optional) Seal 14 Limit switch M510 (optional) Cover flange 15 Alignment magnet... -
Page 16: Technical Data
ECHNICAL DATA Technical data 6.1 Operating limit Operating limit NA7 perm. Pressure [PS] perm. Temperature [TS] 20bar 214°C NA7-50 290psig 417°F 50bar 265°C NA7-52 725psig 509°F 80bar 296°C NA7-80 1160psig 564°F 110bar 318°C NA7-110 1595psig 604°F 150bar 342°C NA7-150 2175psig 647°F... -
Page 17: Dimensions
Device lengths > 6 m are designed as split housing versions with intermediate flanges. Sight length > 2.6 m NA7-50 and NA7-52 with vent plug at the top and drain plug (with indication bar AL2-G) at the bottom T=30mm Sight length >2 m... -
Page 18: Process Connection Types
ECHNICAL DATA OTICE Property damage due to weight loading From a length of 2600 mm, the load on the indicator is too great and the connecting elements are subjected to too much stress. • Ensure sufficient support via the connection bracket on the add-on housing. (e.g. by spring hanger) 6.4 Process connection types Welding end... -
Page 19: Optional Versions
ECHNICAL DATA Float Gauge Type Pressure Density ( Article number Dimension A dm³ < PN25 0.85-1 15-12501 NA7-50 / < PN40 0.78-0.85 15-12973 NA7-52 < PN63 0,78-0,815 15-12974 NA7-80 PS 80 bar 0.72-0.78 40-11869 NA7-110 PS 110 bar 0.63-0.72 40-11879... - Page 20 The probe is suitable for use in potentially explosive atmospheres and has various ship approvals. ATEX, IEC, GL, LRS and ABS approvals are possible Example: NA7-130 Measuring accuracy ± mm Operating voltage 9.6 . . . 35 VDC Output signal 4 .
- Page 21 ECHNICAL DATA Optional floats Gauge Type Pressure Density(kg/dm³) Article number Dimension A2 15-16178 0.78-0.85 15-14790 < PN25 0.683-0.78 15-13319 NA7-50 / NA7-52 0.585-0.683 15-14829 < PN40 0.85-1 15-15048 < PN63 15-17496 0.85-1 40-11870 0.78-0.85 40-11871 NA7-80 PS 80bar 0.68-0.78 40-11873 0.63-0.72...
- Page 22 ECHNICAL DATA Anti-icing protection Anti-icing protection An indication bar with anti-icing protection should be used on gauges containing media with a temperature below 0°C. Due to the anti-icing protection, the visible side is further away from the medium and no frost develops. If the ambient temperature cools below 0°C, frost will continue to form on the pane.
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Page 23: Assembly
SSEMBLY Assembly Assembly with flange • Observe the orientation of the gauge. • Check sealing surfaces for cleanliness • Install the flange connection between the gauge and the boiler/pressure vessel according to the applicable standard 7.2 Assembly by welding ARNING Eye damage due to lack of personal protective equipment Lack of eye protection during welding leads to eye damage in working and bystanders. -
Page 24: Float Installation
SSEMBLY 7.3 Float installation The float is packaged on the outside of the housing when the indicator is delivered. OTICE Material damage to float due to pressurisation Pressurising the float to a higher pressure than the operating pressure can damage the float. -
Page 25: Commissioning
OMMISSIONING Commissioning 8.1 Before commissioning Torque Tightening torque Md → Md [Nm] perm. Pressure PS [bar] in steps 80-130 Tightening torques of the screw plug / drain plug Md= 150 Nm 8.2 Align indicator discs / rollers Fig.1 (without anti-icing protection) Fig.2 (with anti-icing protection) •... -
Page 26: Commissioning At The Same Time As The Boiler
OMMISSIONING 8.3 Commissioning at the same time as the boiler Fig.1 Figure 1: • Close the drain valve/ screw in the screw plug • Open shut-off valves 8.4 Commissioning under pressure and temperature loads Fig.1 Fig.2 Fig.3 Figure 1: • Close the drain valve / screw in the screw plug Figure 2: •... -
Page 27: Servicing
ERVICING Servicing AUTION Cuts due to sharp-edged parts During the maintenance of the product, sharp-edged parts may cause injuries. • Always be aware of sharp-edged parts. • Wear work gloves. 9.1 Preventive maintenance OTICE Creation of a maintenance plan The operator must determine a maintenance plan suitable for the specific application after evaluating his own operating experience. -
Page 28: Emptying The Attachment Housing For Cleaning
ERVICING • Close shut-off valves • Slowly open the drain valve/unscrew the drain plug The add-on housing partially empties. Figure 2: • Unscrew the bleed screw The add-on housing drains completely, the pressure escapes completely via the vent opening. Figure 3: •... -
Page 29: Remove The Float For Cleaning
ERVICING 9.4 Remove the float for cleaning Fig.1 Fig.2 Fig.3 Fig.4 ▪ The gauge must be depressurized (chap.9.2) Figure 1: • Loosen the screws on the cover flange and remove. • Remove the cover flange and seal. • Secure the float from falling out. Figure 2: •... -
Page 30: Case Of Damage
ASE OF DAMAGE 10 Case of damage Fault Cause Remediation Tighten screws / replace Leakage at flange connection Material settlements, wear seal (chap. 10.1) Tighten screws / replace Leakage at screw plug Wear and tear seal (chap. 10.2) Fill level is not displayed Float contaminated Clean float (chap. -
Page 31: Leakage At The Screw Plug Or Drain Plug
ASE OF DAMAGE Figure 3: • Clean the sealing surface and check for damage, replace the sealing ring. • Place the flanges of the display body on the flanges of the shut-off valves • Connect flanges with threaded bolts and install according to the prescribed standard. -
Page 32: Spare Parts And Technical Accessories
PARE PARTS AND TECHNICAL ACCESSORIES 11 Spare parts and technical accessories 11.1 Spare parts Pos. Description Size Article-No. Quantity ½ 1 / 9 Drain / bleed screw 40-10492 21 x 26 x 2 / 10 Sealing ring 40-00128 1.5mm Float see tables (chap. -
Page 33: Accessories
PARE PARTS AND TECHNICAL ACCESSORIES 11.2 Accessories Description Label Article-No. 40-04500 40-04499 40-04501 Water level mark LLWL 40-04498 HHWL 40-04502 40-11595 In addition, the fastening element with article number 25-14980 is required for Water Level Mark-NWL fastening to the indication bar. for indication bar AL2-G and AL3-G Description Label... -
Page 34: Decommissioning And Disposal
ECOMMISSIONING AND DISPOSAL 12 Decommissioning and disposal 12.1 Dismantling the display body During the following work, the individual components hang freely and must be secured against falling. • Loosen nuts on flange connections. • Removing bolts from flanges • Secure loose components against falling Fig.1 Valves and gauges that are firmly connected to each other (e.g. -
Page 35: Disposal
Residues of hazardous substances pose a health hazard. • Indicate possible dangers and take precautionary measures. This high-quality IGEMA product was designed, manufactured and tested with the application of the QM System guidelines in accordance with DIN EN ISO 9001:2015. - Page 40 Direct Download Product page on the Internet Igema GmbH Antwerpener Str. 1 Phone: +49 2501 924 24 0 48163 Muenster Fax: +49 2501 924 24 99 Germany info@igema.com www.igema.com...
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