Retsch Autofill 50 l Manual

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Liquid nitrogen tank Autofill 50 l/150 l

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Page 1 Manual Manual Liquid nitrogen tank Autofill 50 l/150 l Translation © Retsch GmbH, 42781 Haan, Retsch-Allee 1-5, Germany | 26.04.2022 Version 0002...
Page 3: Table Of Contents
Table of Contents Notes on the manual ..........................5 Explanations of the Safety Instructions ..................... 5 General Safety Instructions ....................... 6 Repairs ............................... 7 Confirmation Form for the Managing Operator.................. 7 Type Plate Description ........................8 Safety and occupational health instructions ..................9 General ..............................
Page 4 Notes on the manual...
Page 5: Notes On The Manual
This operating manual does not contain any repair instructions. If faults arise or repairs are necessary, please contact your supplier or get in touch with Retsch GmbH directly. Application technology information relating to samples to be processed is not included but can be read on the Internet on the respective device’s page at www.retsch.com.
Page 6: General Safety Instructions
All persons concerned with the machine in any form This machine is a modern, high performance product from Retsch GmbH and complies with the state of the art. Operational safety is given if the machine is handled for the intended purpose and attention is given to this technical documentation.
Page 7: Repairs
Retsch exclusively. 1.3 Repairs This operating manual does not contain any repair instructions. For your own safety, repairs may only be carried out by Retsch GmbH or an authorized representative or by Retsch service engineers. In that case please inform:...
Page 8: Type Plate Description
Notes on the manual I have read and taken note of the contents of all chapters in this operating manual as well as all safety instructions and warnings. User Surname, first name (block letters) Position in the company Signature Service technician or operator Surname, first name (block letters) Position in the company Place, date and signature...
Page 9: Safety And Occupational Health Instructions
CAUTION Use of liquid nitrogen – Retsch GmbH rules out any liability claims that may arise in the use of liquid nitrogen or similar cooling agents. • Please observe the safety regulations of the cooling liquid supplier.
Page 10: Safety Instructions On The Handling Of Liquid Nitrogen
Safety and occupational health instructions 2.2 Safety instructions on the handling of liquid nitrogen 2.3 Safety instructions on the handling of liquid nitrogen (Oxygen deficiency) The main components of air according to volumes are as follows: – Oxygen O2 21 % –...
Page 11: General Conduct In The Case Of An Accident
Safety and occupational health instructions This list is not complete. 2.3.4 General conduct in the case of an accident In the case of an accident from oxygen deficiency the following regulations should be observed. • Secure the surrounding area to avoid any subsequent accidents. •...
Page 12: General Rules Of Conduct For Splashes With Liquid Nitrogen
Safety and occupational health instructions 2.4.4 General rules of conduct for splashes with liquid nitrogen 2.4.4.1 To the eyes • Rinse eyes with much water for 15 min. • Follow the company instructions for emergencies. • Consult a doctor 2.4.4.2 On the skin •...
Page 13: Oxygen Enrichment
Safety and occupational health instructions • Ventilate the rooms affected sufficiently. • Investigate the cause of the accident. This list is not complete. 2.6 Oxygen enrichment 2.6.1 Dangers Oxygen enrichment may increase the danger of explosion and fire. 2.6.2 Causes Oxygen may be condensed from the air if liquid nitrogen is used and similarly be liquefied because the boiling point of oxygen (approx.
Page 14: Operating The Device
Operating the Device Operating the Device The Autofill 50 l/150 l vessel is a vacuum super-insulated pressure vessel made of corrosion- resistant stainless steel for storing refrigerated liquid nitrogen in conformance to the European Pressure Equipment Directive 97/23/EG, Category I module A, with CE marking.
Page 15: Overview Table Of The Parts Of The Device
Operating the Device Fig. 4: Front view Autofill 150 l 3.2 Overview table of the parts of the device Description Function Element Withdrawal valve Valve for taking out liquid nitrogen Pressure build-up valve Valve for building up working pressure quickly Waste gas valve Valve for draining liquid nitrogen Overflow valve...
Page 16: Technical Data
Operating the Device 3.3 Technical Data Autofill 50 l Autofill 150 l 80cm 160 cm Overall height: 50cm 50 cm Outside diameter: 76cm 76 cm Overall width: 58.5cm 122 cm Immersion depth 5.0cm 5 cm Neck diameter: 44kg 79 kg...
Page 17: Level Display
Determination of the tank filling level of Autofill 50 l • Read the level of Autofill 50 l on the scale of the filling level indicator. The black area on the scale of the level indicator marks 25% of the remaining content.
Page 18 Operating the Device Fig.5: Filling level curve...
Page 19: Filling The Vessel
Operating the Device 3.6 Filling the vessel CAUTION A pressure relief must be carried out for safety reasons prior to the removal of the supply line for the liquid nitrogen. • Close the tap on the liquid nitrogen tank and start the connected device. Wait until the pressure has audibly dropped.
Page 20: Pressure Build-Up
Operating the Device 3.7 Pressure build-up • Close the withdrawal valve (V1) and the waste gas / overflow valve (V3). • Open the pressure build-up valve (V2). • Watch the pressure indicator (DM). • Close the pressure build-up valve (V2) as soon as the needle reaches the red marking or nitrogen comes out of the pressure relief valve (PSV).
Page 21: Maintenance
Operating the Device 3.11 Maintenance Fig. 4: Sealing ring on the siphon The sudden temperature differences when filling the dewar with liquid nitorgen can result in wear or signs of aging on the sealing ring (KD) . • The sealing ring (KD) must be replaced if you notice nitrogen escaping in the area of the tension lock (KS).
Page 22: Admitting The Test Pressure
Operating the Device 3.12 Admitting the test pressure Use a suitable test device to introduce the test pressure. Where the safety valves are not to be removed, the vessel’s inherent pressure is used for the test. Do not conduct the tests with oxygen or inflammable or corrosive gases. 3.13 Checking the seat tightness Increase the test pressure to 90% of the response pressure.
Page 23: Index
Index Index Overall height ............. 16 Overall width ............16 Article number ............8 Overview table of the parts of the device... 15 Oxygen deficiency ..........10 Oxygen enrichment ..........13 Barcode..............8 Bubble method ............ 21 Positive pressure ..........16 Pressure build-up ..........
Page 24 Index Waste disposal marking........8 Weight empty ............16 Year of manufacture ..........8 Weight full ............16 Withdrawal of liquid nitrogen ......20...

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Autofill 150 l