Archive for May, 2012

What you need to know to choose life jackets/ floatation devices:

Wednesday, May 9th, 2012

JBS supplies a complete range of life jackets. We are close partners with Mullion (Sioen) life jackets and flotation devices, which are made in Ireland. They have 25 years of experience supplying floatation devices to mariners worldwide. JBS also offers a lifejacket maintenance/inspection service).

Below we list some of the more usual queries regarding life jacket selection:

Question: What is the difference between 275 Newton and 150 Newton flotation device? How do I decide which I need?
Answer: The difference is the level of buoyancy or flotation provided – a 275 Newton having a higher level of buoyancy being nearly double that of 150 Newton. A 150 Newton should only be used where light weight clothing is being worn and no heavy tools being carried. It is not recommended to the used with a flotation suit or a dry suit. (As it is possible that it will not self-right you in conjunction with this type of clothing). A 275 Newton should be used where heavy weight clothing is being worn or tools are being carried, or when wearing a flotation suit of dry suit. All Mullion 275 N lifejackets are compatible with Mullion flotation suits.

Question: What does Newton buoyancy relate to?
Answer: Newton buoyancy basically relates to the amount of upward force or uplift provided by a lifejacket (or flotation suit / buoyancy aid) in the water.
1 Newton = approximately 1 tenth of a kilo (100 grams)
So a 50 Newton buoyancy aid will give 5 kilos of additional uplift in the water; a 150 Newton lifejacket will give 15 kilos of additional uplift; a 275 Newton lifejacket will give 37.5 kilo 27.5 kilos additional uplift.

Question: How long is a lifejacket guaranteed for?
Answer: This depends on the nature and frequency of use. If it is used in a leisure environment on an occasional basis (providing it is well looked after and serviced regularly) then it may well last for tens of years. If being used in a heavy duty commercial environment on a regular basis then it may only last 1 – 2 years.

Question: How often do I have to have my lifejackets operating parts changed / what is the life on these parts?
Answer: The life / replacement period on the operating parts is as follows:
SOLAS light: 5 years
CO2 gas cylinder: 5 years
United Moulders Firing Cartridge: 3 years
Halkey Roberts Cellulose Bobbin: 2 years
Hammar inflation mechanism: 5 years
NB. This is assuring there is no interim damage or corrosion to these parts within this period. If there is, then they should be replaced at this point.

Question: Should a crotch strap be worn at all times?
Answer: It is strongly advised that it should be. Otherwise you fall into the water, the tendency will be for the lifejacket to come up over your head with the force of inflation and the impact of the water. Then your lifejacket will not give you the correct protection and / or support your head out of the water.

Question: How important is a spray hood?
Answer: In an offshore environment, it is very important as it covers the face and protects all your airways – i.e. ears, nose and mouth from water flushing into them from the wave motion. It also provides comfort and a degree of thermal protection to the face by keeping it enclosed and covered.

Question: It is possible to purchase inflation mechanism and gas cylinders for rearming my lifejacket when it has been fired?
Answer: Yes, Mullion supply all rearming parts required for all Mullion lifejackets and rearming instructions can also be supplied.

Question: My garment incorporates an integral inflatable lifejacket. Does the complete garment have to be returned for servicing?
Answer: Ideally yes, as then the JBS service centre can ensure the inflatable bladder / lifejacket can be refilled correctly after service.

Question: Is my weight a determining factor in the selection of my lifejacket? If I am heavy in weight do I need to buy a 275 N instead of a 150 N?
Answer: Not necessarily. Generally speaking larger than average people have more inherent buoyancy in their own bodies and greater lung capacity than smaller people so the additional buoyancy required to support you in the water and self-right you is sometimes less than with a smaller person.

Question: Are your lifejackets filled with EN1095 deck safety harness suitable for lifting purposes? E.g. Helicopter rescue?
Answer: No, this harness is only designated for use with attachment to a safety line on deck and is not designed or approved for lifting purposes

Question: What is the key protection given by a lifejacket?
Answer: The key protection factors of a lifejacket are that on water immersion it will:
Self -right you if you fall in face-down and / or unconscious
Will support your head and upper torso above the water level to minimize the risk of drowning

Question: How often should my lifejacket be serviced?
Answer: For SOLAS life jackets they must serviced at an independent approved service centre approved by both the manufacturer and the National Administration. E.g. In the UK this would be the MCA (Maritime & Coastguard Agency). They must be serviced at intervals of 12 months maximum.
For CE life jackets there is no legal requirement for servicing but it is strongly recommended that they are also serviced by an independent approved service centre or an annual basis.

Question: What is the difference in weight between a 150 Newton and a 275 Newton lifejacket in its undeployed state?
Answer: Less than 30 grams, which is very little. The common perception is that a 275 Newton lifejacket is a lot heavier and more cumbersome than a 150 Newton, but this is not the case.

Check out JBS Group Online shop for more products or call us on 00353 47 76500

Redi-Chlor Water Decontamination Tablets

Wednesday, May 9th, 2012

Make most any water, drinking water…..Safely…… Effectively.

RediChlor is ideal for all sorts of outdoor activities.

Redi Chlor is suitable for Army, Civil Defence, Red Cross, humanitarian uses as well as camping and general outdoors trekking/hiking, mountain biking activities where pure clean water is vital in typically remote locations.
One tablet of Redi Chlor makes 20 litres (5 gallons) of water safe to drink in just minutes.

• One Bottle of RedicChlor Treats 2000 litres or 500 gallons of water.
• Redi Chlor is an EPA registered chlorine tablet and is National Sanitation Foundation approved.
• Redi Chlor kills bacteria and viruses in just 30 minutes.
• Use the same method 98% of cities use today.
• Redi Chlor is Iodine FREE.
• Redi Chlor makes water safe without the need to boil.
• Redi Chlor cleans water for less than € 0.05 per gallon.
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When clean drinking water isn’t easily accessible RediChlor can help.

How RediChlor Works
Chlorination is the recognized and accepted method of treating water supplies throughout the world. When added to water, calcium hypochlorite forms hypochlorous acid. Hypochlorous acid thoroughly destroys microorganisms by penetrating their cell walls and attacking the exposed internal structure.

Just one tablet of RediChlor contains enough chlorine to rid five gallons of water of potentially harmful microorganisms.
• Long storage life – tablet strength decreases only 5% per year.
• Can use for long term water preservation.
• Purifies water for less than 3¢ a gallon. Compare aerobic oxygen at 23¢ per gallon or iodine tablets at 56¢ a gallon.

To say the least, water purification can be an involved and complicated process. Huge books have been written on it. College degrees are based on it. The EPA charged over €200,000 to just test and register this one product. (Maybe that’s why there isn’t more water purification products out there.) RediChlor tablets work by putting chlorine in your water. Chlorine is the recognized method of purifying water all over the planet both because it is effective and because it’s so inexpensive.

Don Peeters at Redi Clean developed a new application for an old procedure by putting chlorine into tablet form. Chlorine bleach is still a wee bit cheaper but over a year’s time chlorine bleach’s strength decreases 50%. It takes the powder 14 years to reach it’s half life. Because of this, liquid bleach certainly isn’t a long term solution unless you plan on rotating it in and out of your storage. Some people store dry chlorine powder (calcium hypochlorite). However, you really need to be careful using this as such a small amount goes a long way. It’s really dangerous if you don’t know what you’re doing. It also requires a nice set of scales with accuracy down to the milligram. The vast majority of us don’t even know what a set of scales like this look like. Don makes the best of both by taking the powdered chlorine which annually only loses 5% of it’s strength and presses it into pills with just the right amount of powder to purify 5 gallons of water.

Chlorine Concentration: Each capsule will put 11 parts per million (ppm) of chlorine into 20 litres (5 gallons) of water.

How much chlorine in your water is safe: Standard city water systems can have a range of 0.5 to 15 ppm chlorine. This whole subject of chlorine in the water supply is hotly debated, however. Many people feel that any chlorine at all in their water is very BAD. Obviously, the nation’s water-works experts disagree and we could argue about this forever. But there is a solution. Chlorine is a non-persistent agent in water and quickly dissipates out of the water if left uncovered. Don suggested 1 1/2 to 2 hours should take care of this. Pouring the water back and forth between two containers will greatly decrease the time it takes for this to happen.
Chlorine Demand: As organic material is destroyed in the water, it uses up the chlorine. The more heavily contaminated the water is, the more chlorine it will take to get the job done.
To kill most bacteria it only takes 0.5 ppm chlorine.
“Average” non-treated water places a chlorine demand of about 5 ppm.
As these tablets put 11 ppm of chlorine in the water, after it has done it’s job there should be 5-6 ppm of chlorine left.
This is more than an adequate amount of chlorine to ensure all the bacteria has been destroyed. For argument sake, let’s suppose you have water that creates an unusually high demand on the chlorine. Most people can smell chlorine down to 0.5 ppm. After waiting for the 30 minute purification period, if you can smell chlorine in the water you are okay. If there is no chlorine smell, add another pill and wait another 30 minutes then smell again.
Ok. We all know chlorine kills bacteria and viruses but I’ve heard differently about Protozoa: In answering this question Don explained chlorine will kill protozoa but you must use a higher concentration to do this. Cryptosporidium parvum is the hardest protozoa to kill. Don explains a concentration of 20 ppm (that’s two pills in 5 gallons of water) for a period of 3 1/2 hours will kill this pathogen. The much better known Giardia lamblia protozoa also requires a concentration of 20 ppm but needs a duration of only one hour to get the job done. Don suggests if there is any chance at all you have protozoa in your water to follow the above procedure.
Gas Off: As mentioned above, chlorine dissipates quickly out of open water. Because of this, you should insure the water you are treating remains tightly sealed during the waiting period the chlorine is doing it’s thing. If this isn’t possible, be sure you can still smell chlorine coming from the water after the water treatment time period is over.
Using Chlorine For Long Term Water Storage: Chlorine can be safely used to put away water for long term storage but there is a little more maintenance involved than if you were using aerobic oxygen. As you add the water, you need to add chlorine tablets as many city water systems don’t have enough chlorine in them. As this water already contains some chlorine, you may not need to add the whole tablet per every 20 litres/five gallons of water. Be sure you get a good, air tight seal on your container or off gassing will quickly dissipate your chlorine. Every two or three months you should remove the lid on your water container and smell for chlorine. If none can be detected, you should add another tab per 20 litres/5 gallons of water and reseal your container. Even in a sealed container off gassing will continue, but at a greatly reduced rate.
Redichlor is available from  http://www.jbsgroup.ie.

Redi Chlor is suitable for Army, Civil Defence, Red Cross, humanitarian uses as well as camping and general outdoors trekking/hiking, mountain biking activities where pure clean water is vital in typically remote locations.