April 15, 2016
February 11, 2016
Trichloroethylene due to be phased out in April 2016.
ProSolv is a new, less expensive fluorinated solvent formulation for all precision cleaning applications.
ProSolv the new critical cleaning solvent has been developed by EnviroTech Surface Technologies as a “drop in” cost effective alternative which is less expensive than the current fluorocarbon formulations you may be using.
ProSolv offers future proof cleaning systems giving long term savings without compromising quality. Substitution is simple with no changes to equipment or control settings needed.
Users of trichloroethylene, which is due to be phased out as a cleaning solvent in April 2016, only 3 months away, may be able to use ProSolv as a cost effective replacement in many applications.
ProSolv is friendly to the environment it has zero Ozone Depletion Potential (ODP) and a very low impact on global warming. In addition, it is a non-flammable stable azeotrope needing no testing for acid acceptance or stabilising additives, easy to use and maintain and safer for employees and the workplace.
ProSolv like many other fluorinated solvent azeotropes is extremely effective for precision cleaning in hightech industries such as aerospace, aviation, electronics and medical due to the use of an additive trans 1,2-dichloroethylene.
This produces a powerful fluorinated cleaning solvent with a very low surfaces tension which cleans blind holes and the smallest gaps more effectively at a lower cost. With these wide range of properties ProSolv is particularly effective used with ultrasonics.
ProSolv can usually be used in existing degreasers or sprayed from an aerosol container. Our fluorinated solvents are ideal for the cost-conscious user for precision cleaning and degreasing of electronics, metals and glass.
ProSolv can be used to remove adhesives, fluxes, pastes, buffing compounds, greases, silicone oils, particulates, resins, waxes and other oils and soils.
ProSolv is only one of a wide range of cleaning solvents and solutions produced by engineering cleaning specialists EnviroTech Surface Technologies. Our Technical Centre in Essex is available for you to visit to test clean your components with ProSolv or compare results with the other products such as EnSolv or Clarea solvents we supply. Our technical team have extensive knowledge of equipment and systems to help you find the most effective, budget-friendly, future proof and environmentally conscious solution for your business. EnviroTech Surface Technologies have distributors located across the E.U. and Middle Eastern countries all of whom can offer technical advice and support.
December 10, 2015
Are you still using Trichloroethylene for Vapour Degreasing?
High performance cleaning at a lower cost than other fluorinated solvent cleaners
Trichloroethylene will not be obtainable for metal cleaning or other uses without authorisation after April 2016.
ProSolv® enables high performance cleaning at a lower cost than other fluorinated solvent cleaners. A proprietary tertiary azeotropic formulation based on a fluorinated solvent which provides a direct replacement for trichloroethylene and other chlorinated solvents.
ProSolv® is extremely stable and simple to use meeting all the increasingly stringent legislative demands for safer, non flammable solvents with a low environmental impact in the precision engineering industries.
ProSolv® can be used in most existing vapour degreasing equipment and can be used safely for immersion cleaning using ultrasonics, where it has been optimised with a high specific gravity and very low surface tension.
Unlike other chlorinated solvents ProSolv® can be used for manual cleaning in a suitably ventilated area. Typical applications are where high performance critical cleaning is required at lower cost than other fluorinated solvent cleaners. Vapour degreasing for medical, aerospace, optics, oxygen equipment service, high vacuum components and electronics.
ProSolv® is an excellent choice to replace flammable solvents such as MEK, Acetone, Iso propyl alcohol (IPA) or hydrocarbons where manual wiping or brush cleaning is the preferred cleaning method.
ProSolv® is a stable azeotrope which can be recycled by distillation for reuse through many cycles. It is a very stable mixture with no need for monitoring or the need for additives or stabilisers.
ProSolv® offers a cost effective replacement in formulations for dip, spray or aerosol applications and as a fast drying carrier solvent for oil, silicones and other lubricants.
November 4, 2015
SuperCORR A lubricant keeps Flight MH370 search planes flying
SuperCORR A the lubricant and anti-corrosion formulation from the CORR-EX division of EnviroTech Surface Technologies is helping in the search for the missing Malaysia Airlines flight MH370 passenger jet.
Lockheed Martin AP-3C Orion’s aircraft of the Royal Australian, Korean and Japanese Air Forces used for anti-submarine and maritime surveillance are still searching for debris in a vast area of ocean, bigger than the land area of Europe, southwest of Perth. The maintenance schedules specify SuperCORR A to lubricate and protect the flap tracks and screw jacks in the wings of the aircraft.
October 20, 2015
SuperCORR A protects and lubricates contacts on the new Charge / Sync Cable from Lifedge
SuperCORR A lubricant and protective coating widely used by the military, electronics and aerospace industries for critical applications is used to protect contacts on the new Lifedge lightning connector to USB cable to offer the protection needed in extreme conditions.
SuperCORR A deposits a dry protective film with excellent corrosion protection and lubricant properties plus the added advantage of a hydrophobic surface rejecting water that ensures the easiest and best connection for the very close spaced connectors.
Lifedge is the world’s first 100% waterproof, rugged Lightning to USB cable for charging and mobile connections whatever the weather or conditions. Developed for use in all outdoor activities including sailing, hiking, military, naval, surveying or other challenging uses. With an ultra-durable outer coating that will never fray and double-moulded, super-tough plugs, charging, downloading and data transfer is improved even in the most extreme and difficult conditions.
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February 10, 2015
YOUR SHIELD AGAINST RUST AND CORROSION
Introducing CORR-EX VCI corrosion protective packaging for storage of cleaned machined parts, using volatile corrosion inhibitors to prevent in-storage corrosion. Our packaging is manufactured from polythene or PPE film impregnated with volatile corrosion control agents which are safe on the parts, for operators to handle and have no impact on the environment. CORR-EX VCI anti-corrosion packaging is compatible with all metals and many plastics and other composite materials.
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December 3, 2014
EnSolv and the Environment – Update from the Co Chairman of the United Nations Ozone Assessment panel on nPB.
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Analysis of Status on Science of n-PB Effects on Ozone
White Paper By Don Wuebbles (Department of Atmospheric Sciences – University of Illinois).
November 11, 2014
There is disagreement between the use of scientific information by the European Union and the United Nations Environmental Panel / World Health Organisation (UNEP/WHO) the authority for ozone depletion assessment. Dr. Don Weubbles acknowledged as one of the world authorities on ozone depletion and who Co Chaired the UNEP/WHO 2014 ozone assessment panel explains in detail why the official world study disagrees with the European Union Environment Agency 2014 assessment as not being supported by science.
EnSolv is safe for the environment backed by the most sophisticated and knowledgeable world scientists.
Click here to read or download the full article
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November 25, 2014
Cleaning For Oxygen Service Whitepaper
White Paper By Phil Dale (Co-contributor Handbook for Critical Cleaning – Liquid Displacement Drying Techniques).
Cleaning for oxygen service is best defined as the removal of combustible contaminants from the surface of any equipment or system in oxygen service, including all parts thereof. Essentially, any component that may come into contact with an oxygen rich environment.
The combustible contaminants include organic and inorganic substances such as hydrocarbon material for example oils and greases, paper, fibre, coal dust, solvents, weld slag, rust, sand and dirt. If these contaminants are not removed properly, in a worst case scenario, this can cause combustion in an oxygen atmosphere or at the least rejection of the product due to unacceptable product purity.
Oxygen in its own right is not flammable but it supports combustion. Oxygen can react with most materials. The higher the oxygen content and/or pressure in a system the more vigorous the combustion and the lower the ignition temperature required. Materials that do not normally ignite in atmospheric air will burn and may explode in an oxygen rich environment. In addition the oxygen rich environment will give rise to a higher flame temperature and combustion velocity and the devastating consequences thereof.
The recognition of oxygen’s reactivity has led to stringent requirements regarding the cleanliness of equipment in oxygen service. Strict guidelines exist to ensure that care must be taken in the selection of equipment including all materials and components, all of which need to be oxygen compatible. They must also be free from combustible contaminants as described above.
With this in mind special consideration must be given to any cleaning processes employed in the manufacture and maintenance of all oxygen service systems.
Specific consideration must be given to the following:
- cleaning standard to be achieved (how clean is clean?)
- cleaning procedure specified (or not)
- cleaning agent to be used
- surface properties of the parts to be cleaned
- shape and geometry of the material
- types and amounts of contaminants
- the degree of automation required
The size and capacity of the equipment is determined from:
- the size of the material or components to be cleaned
- the required throughput
Your starting point should be the cleaning standard and procedure. For example *G93 indicates that solvent cleaning is preferable. Solvent cleaning and solvent vapour phase cleaning of components consists of the removal of contaminants by immersion in the solvent, possibly with the addition of ultrasonic agitation and the action of continued condensation of solvent vapour on the component surfaces. The procedure requires that the oxygen equipment, system or component is colder than the solvent boiling point. This allows the vapour to condense on the components and perform a final rinse.
The major significant advantage of solvent cleaning is that re-vaporised solvent is always clean and the contaminants remain in the evaporator liquid section which requires only periodic cleaning out, thus causing a reduction in the frequency of system downtime.
It is also important to note **G127–95 (Reapproved 2000). The effectiveness of a particular cleaning agent depends upon the method by which it is used, the nature and type of the contaminants and the characteristics of the article being cleaned, such as size, shape, and material. Final evaluation of the cleaning agent should include testing of actual products and production processes.
All equipment must, together with the cleaning chemistry, fulfil as a minimum the legislation for health, safety and environment.
The choice of equipment has to be based on the efficiency of cleaning versus cost bearing in mind what is the cost of the problem? If there is no cost there is no problem.
The efficiency is controlled by utilising typical samples, written procedures and requested criteria for cleanliness.
If you need to clean to ASTM G93 – 03(2011) Standard Practice for Cleaning Methods and Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched Environments then all of the above needs to be given due consideration.
*G93 – Standard Practice for Cleaning Methods and Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched Environments
**Designation: G127 –95(Reapproved 2000) Standard Guide for the Selection of Cleaning Agents for Oxygen Systems.
Handbook for Critical Cleaning, Second Edition – 2 Volume Set Hardcover – April 4, 2011by Barbara Kanegsberg (Editor), Edward Kanegsberg (Editor)
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October 13, 2014
A detailed comprehensive review of 1-bromopropane studies confirm current recommendations by ENVIRO Tech for occupational exposure levels for safe usage of EnSolv® as a vapour degreasing solvent.
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Update on a safe occupational exposure level for 1-Bromopropane
Prepared for EnviroTech Europe, Ltd.
Prepared by Dr. Mark Stelljes
SLR International Corporation
This paper re-evaluates EnviroTech Europe’s (ETE’s) current occupational exposure level recommendation of 100 ppm for 1-bromopropane (1-BP) [106-94-5] in the vapor degreasing industry in light of the recent lowering of the ACGIH Toxicity Threshold Value (TLV) from 10 ppm to 0.1 ppm. The 0.1 ppm value is based on a study of 86 workers exposed to 1-BP during its manufacturing in China in four different facilities. The authors reported significant effects at all 1-BP exposure levels down to 1.28 ppm. The 1-BP in these facilities had concentrations of the isomer 2-bromopropane [75-26-3] (2-BP) present as a contaminant at about 10-20 times the level sold for vapor degreasing.
There are several factors that undermine the conclusions reached in the paper that a concentration of 1.28 ppm resulted in toxicity in exposed workers. These factors were related to:
(1) Exposure measurements – passive rather than active samplers were used, and concentrations varied by more than tenfold for the same activity.
(2) Exposure via other routes in addition to inhalation – described worker activities indicate substantial dermal exposure, which increases the overall dose of the chemical relative to just inhalation exposure.
(3) Exposure to other chemicals – at least 20% of the workers were previously exposed to 2-bromopropane
(2-BP), and no testing was done for other chemical exposure.
(4) Statistical methods and interpretations – instead of using paired patient-exposure data, authors categorized exposure into groups (e.g., high, low); this resulted in apparent statistical relationships that may not be biologically relevant.
(5) Lack of robust dose-response relationships – when evaluating typical doseresponse relationships, only a single parameter (vibration sense in the toes, a subjective parameter) was shown to be significantly different across all dose levels.
(6) The outcome of the subjective vibration sense test was in part dependent on the testing doctor – this dependency should remove the test and its results from consideration in the paper as a scientifically defensible endpoint.
When all of this information is considered as a whole, it is unlikely that the 1.28 ppm lowest effect concentration reported in the paper is accurate. The interpretations in the Li et al. study are inconsistent with expectations based on the ways in which 1-BP acts in rodents relative to humans. Studies on how 1-BP acts in the body of rats and mice and studies on metabolism of the chemical in humans indicate that humans should be no
more sensitive to 1-BP than either of these rodents.
Based on the weight of evidence available for the toxicity of 1-BP in humans and rodents, there is no credible scientific reason to target an occupational concentration as low as 10 ppm or 0.1 ppm. ETE’s current recommendation of 100 ppm should be maintained, and employers together with vapor degreasing personnel should not be concerned about the much lower levels recommended by the ACGIH.
Click here to read the full article or download the report
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September 24, 2014
What You Should Know About The ACGIH’s Threshold For nPB Solvents
If you work with industrial chemicals, materials or solvents then you may have heard of the American Conference of Governmental Industrial Hygienists (ACGIH). The ACGIH is a scientific, but non-governmental body of industrial hygienists that publishes Threshold Limit Value (TLV) opinions on chemicals such as n-propyl bromide the base solvent for EnSolv formulations. These TLV opinions are not held to the same standards as limits set by an organization such as OSHA in the USA, but are still published in books available on the ACGIH website. You or someone else in your company might be familiar with these TLVs.
In March 2014, the ACGIH published a new TLV for n-propyl bromide (1-bromopropane). This TLV was set at 0.1ppm, and refers to “commercial grade bromopropane (99% 1-BP with 0.1%-0.2% 2-bromopropane).” 2-bromopropane is also known as isopropyl bromide (iPB). Modern nPB manufacturing processes result in nPB with <0.01% iPB contamination, which is of a pharmaceutical quality.
The 1-BP (nPB) properties referenced by the ACGIH rely to some degree on information first published in 1999 and 2000, which contains information that is out of date and inaccurate when referring to today’s purity of 1-BP. Some of the things to keep in mind regarding ACGIH TLV opinions include:
- TLVs are not determined by speaking openly with scientific experts, but in closed-
- Door meetings.
- There is no scientific consensus backing up ACGIH’s findings.
- ACGIH TLV opinions may involve conflicts of interest and uncertain science.
- The ACGIH is a not-for-profit organization that funds its activities by selling books; it is not a government-sanctioned panel of experts.
The IBSA et al. v. ACGIH lawsuit documents a number of these concerns involving the ACGIH and how they determine their TLV opinions. There is nothing worse than misinformation in our field – not only are safer chemicals such as nPB made to seem dangerous, but chemicals that are unsafe or unsuitable might be seen as acceptable alternatives.
It is of great concern to that in spite of the very demanding regulations already in effect in Europe some manufacturers of very expensive “new” fluorocarbon alternatives to the less expensive conventional solvents choose to imply that recent ACGIH recommendation for a reduction of exposure limits will have legal effect in Europe. This wrong and no credence should be given by users to any “recommendations” except those issued by government regulators.
The EU will establish DNEL (Derived No Effect Level) recommendations under the REACH legislation in due course and until these are issued all properly designed and maintained equipment is perfectly safe for use for vapour degreasing and any suggestion to the contrary may cause unnecessary confusion and restrict the use of this very useful technology.
Enviro Tech urges you and others in your company not to rely solely on TLVs, but rather on official and informed sources instead (See US EPA SNAP Approval for 1-BP). For more information on the properties of nPB and related solvents, please visit www.vapour-degreasing.com or contact ENVIRO Tech today.
If you would like further information or assistance, please e-mail or call Doug Went.
Telephone: +44 (0) 20 8281 6370
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