NM120L - User Manual 

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Contributed by

Liam Couttie

Updated date


Review date

03 May 19


NM120L - User Manual

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User Manual,

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Company Brand

Peak Scientific

Public / Private


Reviewed on 3rd may 2017 - LC

Extracted text


NM120L- Nitrogen Gas Generator

UM – NM120L


Page No Document History Warranty Statement Safety Notice to Users Declaration of Conformity Air Connection Electrical Connection Principle of Operation Commissioning Maintenance Schedule Technical Specifications Pneumatic Diagram Electrical Diagram Over Dimension Maintenance Log Notes 3 4 4 5 6 6 7 8 9 12 13 14 15 16 17


NM120L- Nitrogen Gas Generator

UM – NM120L


Issue No 1 2 Document Created Filter Info Update


Initials S.K LC

Date 18/05/10 01/05/13


NM120L- Nitrogen Gas Generator

UM – NM120L

Warranties & Liabilities

Warranties and Liabilities
1. The Company warrants that it has title to the Goods. 2. Subject to the provisions of this clause the Company warrants that the Goods shall comply in all material respects with any specification referred to in the Order Confirmation (as the same may be amended) and shall, subject thereto, be free from defects in material and workmanship for the lesser of a period of twelve months from the date of delivery or thirteen months from the date of dispatch from the factory. 3. Save as provided in this clause and except where the Goods are sold to a person dealing as a consumer (within the meaning of the Unfair Contract Terms Act 1977) all warranties, conditions or other terms implied by statute or common law are hereby expressly excluded save to the extent they may not be lawfully excluded. When the Goods are sold to a consumer within the meaning of the Unfair Contract Terms Act 1977 their statutory rights are not affected by the provisions of this clause. 4. In the event of the Customer making a claim in respect of any defect in terms of clause 2 hereof the Customer must:4.1. reasonably satisfy the Company that the Goods have been properly installed, commissioned, stored, serviced and used and without prejudice to the generality of the foregoing that any defect is not the direct or indirect result of lack of repair and/or servicing, incorrect repair and/or servicing, use of wrong materials and/or incorrect spare parts; and 4.2. allow the company to inspect the Goods and/or any installation and any relevant packaging as and when reasonably required by the Company. 5. Subject to the Company being notified of any defect as is referred to in sub-clause 2 hereof within a reasonable time of it becoming apparent and subject always to the terms of sub-clause 4 hereof, the Company shall, in its option, replace or repair the defective Goods or refund a proportionate part of the Price. The Company shall have no further liability to the Customer (save as mentioned in sub-clause 6 hereof). The Company shall be liable to indemnify the Customer in respect of any claim for death or personal injury to any person in so far as such is attributable to the negligence or breach of duty of the Company or any failure by the Company to comply with the provisions of sub-clause 2 hereof. Save as provided in sub-clause 2 hereof the Company shall not be liable in respect of any claim by the Customer for costs, damages, loss or expenses (whether direct, indirect, consequential or otherwise) or indemnity in any respect howsoever arising including, but not by way of limitation, liability arising in negligence (other than pursuant to clause 6 above) that may be suffered by the Customer or any third party.



SAFETY NOTICE TO USERS These instructions must be read thoroughly and understood before installation and operation of your Peak Scientific NM120L. Use of the Generator in a manner not specified by Peak Scientific MAY impair the SAFETY provided by the equipment. When handling, operating or carrying out any maintenance, personnel must employ safe engineering practices and observe all relevant local health and safety requirements and regulations. The attention of UK users is drawn to the Health and Safety at Work Act 1974, and the Institute of Electrical Engineers regulations. WARNING: Nitrogen is not a poisonous gas, but if the concentration in the inhaled air becomes too high there will be a risk of asphyxiation.


NM120L- Nitrogen Gas Generator Declaration of Conformity

Declaration of Conformit

RoHS State
WEEE Statement of •Compliance (WEE/FjQ, I1 16:X1U The WEEE (Waste of Electrical & Electronic Equipment) Directive 2002f96}EC, issued by the European Union, aims to reduce the impact,. upon the envirronment, from disposal of certain types of equipment.It requires producers to in,plement controls, to ensure that eq;uipment that they produce, is correctly disposed ·of, following the end of i ts useful life. Peak Scientific l nstnrments Ltd fully complies With it's obligations towards this important legislation. These obligations refer to all electrical equipment that has been dispatched by us from I st J uly, 2007, within the United Kingdom. As part of our Compliance towards this, we have placed the management of its disposal with the B2B Complianc.e· s· cheme. They can be contacted directly on 01 691-676124, or· by visiting thei·r website on VN.w.b2bcon-rpliance.org.uk.

Ken Brown Quality Assurance Manager


NM120L- Nitrogen Gas Generator NM120L- Nitrogen Gas Generator

UM – NM120L

The Nitrogen Generator should be connected to a clean, dry, OIL - FREE source of compressed air. A minimum pressure of 125 psig is required for efficient operation of the Generator. Any doubts as to the suitability of your compressed air supply should be referred to the factory for advice. A MAXIMUM OIL VAPOUR CONTENT OF 5 mg per m^3 is PERMISSIBLE Air Inlet and Nitrogen Outlet connections are at the rear of the generator in the middle right side of the panel. The Air inlet connection is the left port. 3/8” BSP female, outlet port is 1/4” BSP female. The generator is supplied with two Breathing Air pre-filters and an Activated Carbon post filter, which are fitted internally. The Breathing Air filters will drain moisture and are equipped with automatic drains. This is connected to the 1/8” BSP Female port at the bottom of the rear panel. Any bulk moisture in the inlet air will be trapped by these filters and released through this drain port, which should be led to a convenient place.

Important Electrical Notice This unit is classified as SAFETY CLASS 1 equipment. THIS UNIT MUST BE EARTHED. Before connecting the unit to the mains supply, please check the information on the serial plate. The mains supply must be of the stated AC voltage and frequency. EARTH/GROUND (E): Green & Yellow or Green LIVE (L): Brown Black Neutral (N): Blue White Fuse 1.6Amp The generator protection fuse is located on the front panel left hand side next to on/off switch of the Generator. Connect the generator to a single-phase supply using the power cord provided.


NM120L- Nitrogen Gas Generator

UM – NM120L

Principle of Operation

Principle of Operation

Peak Scientific Instruments Membrane Generators utilise Hollow Fibre Membrane Technology to efficiently separate Nitrogen from other gases present in ambient air. The membrane operates on the principle of selective permeation in that so-called “Fast” gases such as H2O, CO2 & Oxygen will permeate through the membrane wall whilst so-called “Slow” gases will not and continue along the membrane tube and are thus available for collection and use.

Air passes into the system via the Breathing Air Filter. This will prevent bulk moisture and harmful contaminants from reaching the Membrane. The clean air then passes into the Membranes where Oxygen, CO2 and Moisture are removed allowing High Purity Nitrogen to pass through. The Output Flow is regulated for pressure and then passed through an Activated Carbon Filter to ensure no carry-over of harmful contaminants


NM120L- Nitrogen Gas Generator

UM – NM120L



With the Generator installed as described earlier. Disconnect the Nitrogen Outlet connection to allow the generator to vent to atmosphere until the unit is stabilized then open the air supply. The Generator has been pre-set in the factory to give the specified output flow-rate and pressure. Once the Membrane reaches the design pressure the Generator will stabilise and produce pure Nitrogen. Maximum purity will be achieved after around 1 hour. After this time the generator can be re-connected to the application. The design of the generator is that it will deliver up to rated output flow of Nitrogen at 100 psig. Should the demand for Nitrogen be less than the rated output flow, or indeed should the demand stop the generator will Automatically go into stand by mode this will switch off inlet Air supply, and on demand of Nitrogen the pressure switch will detect and energize solenoid valve and generator will start to produce Nitrogen. The generator is protected from over pressurising.


NM120L- Nitrogen Gas Generator

UM – NM120L

Maintenance Schedule

WARNING: Servicing and/or repair of the Generator should only be undertaken by a TECHNICALLY COMPETENT PERSON with the Generator in a safely isolated condition.
Due to the simplicity of the design and the small number of moving parts the NM Series Nitrogen Generator will have a long and trouble free life. However as with all scientific and technical equipment it should be regularly inspected and serviced as below BA Inlet Filters RAC Filter Elements Every 12 – months Every 12 - months

BA Inlet Filter Elements
These should be changed at 12 months intervals. In addition filter bowls should be cleaned and, the operation of the auto-drains should be checked, if auto-drain requires replacing. Part # is (02-4485).

FAILURE TO FOLLOW THE PRESCRIBED MAINTENANCE PLAN WILL INVALIDATE THE PRODUCT WARRANTY The Air supply to the Generator MUST be turned OFF and the Generator MUST be de-pressurised prior to attempting to remove ANY filter bowl. Failure to do this may cause injury.


NM120L- Nitrogen Gas Generator

UM – NM120L


Inlet Filter / Separator Elements These should be changed at intervals as indicated below. In addition filter bowls should be cleaned and, the operation of the auto-drains should be checked. The Air supply to Generator MUST be turned OFF and the Generator MUST be de-pressurised prior to attempting to remove ANY filter bowl. Failure to do this may cause injury. Inlet Breathing Air Filter / Separator Elements The top Filter Element (00-4427) should be changed at 12-month intervals. The bottom element should be changed at 12-month intervals. The Part Numbers are as shown in the drawings below.
RAC Element Prt. # 00-4427

Coalescing Element Prt. # 00-4424

Auto Drain Prt #02-4485


NM120L- Nitrogen Gas Generator

UM – NM120L


RAC Filter The Element is as shown, and should be changed at 12-month intervals. The Air supply to the Generator MUST be turned OFF and the Generator MUST be de-pressurised prior to attempting to remove ANY filter bowl. Failure to do this may cause injury.

R A C E le m e n t P rt. # 0 0 - 4 4 2 5

The filter housing is removed by un-screwing in a counter clockwise direction
IMPORTANT!!! Ensure that the system is NOT under pressure before attempting to remove the bowl and that the air supply is shut-off.


NM120L- Nitrogen Gas Generator

UM – NM120L

Technical Data

General Details
5 oC (41 oF) 30 oC (86 oF) 70% RH(max)

Minimum Operating Ambient Temperature Maximum Operating Ambient Conditions Inlet Conditions (Free of oil and bulk moisture) Minimum Air Inlet Pressure Maximum Air Inlet Pressure Minimum Air Inlet Flow Rate Electrical Connection 100Vac – 240Vac

125 psig (8.61 Barg) 145 psig (10.0 Barg) 360 l/min (ATP)

Fuse 1.6Amps

Outlet Gas Maximum Pressure Drop (Outlet-Inlet) δP Maximum Gas Outlet Pressure Maximum Outlet Flow (High Purity Nitrogen) Start up time for Purity Particles Serviceable Parts List Breathing Air Inlet Filter Elements Active Carbon Filter Element 8 psig 100 psig 120 Litres/min (ATP) 60 minutes 0.01um (Service Kit Part # 08-4429) 00-4424 00-4427 00-4425

General Dimensions W x D x H Shipping Weight Shipping Weight Dims cm (inches) Kg (lbs) Kg (lbs) 61 x 66 x 140 (24 x 26 x 55) 190 (418) 78x80x160 31x32x63









Non-Return Valve

Inlet Valve


Inlet BA Filter

RAC Filter

System Diagram





NM120L- Nitrogen Gas Generator

Overall Dimensions

Overall Dimensions





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NM120L- Nitrogen Gas Generator

UM – NM120L

Maintenance log

Maintenance Log

Model- NM120L

Serial number

Work Done








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