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NPO Poisk

Oxygen equipment for climbers

 

Dear Friends!

 

 

This year marks twenty years of use our oxygen system in high-altitude climbing.

 

 

 

 

The system has established as useful and convenient, all its components held a range of sophisticated testing and inspection due to the producing and before sale, (for example – one cylinder from 200 pcs. cylinders’ batch must be destroyed, and the second cylinder must be filled 15 times and also destroyed too).

 

 

 

 

Today we are happy to represent you the new version of our system – oxygen apparatus “POISK - OS” (see pic. 2).

 

 

Basic differences of new version:
1. The weigh and dimensions still almost the same, but the producing technology became more sophisticated, that is why cylinders became more resistant and filled now to the pressure 300 bar at the temperature +20 °C. 4 L cylinder also contain now no less than 1600 g of oxygen (1650±25) (previously - no less than 1500 g), and 3 L cylinder contain now no less than 1200 g (previously – no less than 1100 g). Each of oxygen cylinder “POISK-OS” have its own number, like it was in the past, and its own variant of the new plastic packaging (“sleeve”).

 

 

 

 

About cylinders

 

 

All our cylinders for climbers differ into the next groups.

 

 

Group A. New cylinders, which filled by “POISK Ltd.” to the pressure 340 bar at T=+50 °C (300 bar at T=+20 °C). These cylinders have a new plastic packaging (“sleeve”).

 

 

Group B. New cylinders, which filled by our Agency in Kathmandu to the pressure 340 bar at T=+50 °C. These cylinders have a new plastic packaging (“sleeve”).

 

 

Group C. Previously used cylinders, which have passed the necessary controls, younger than 2 years at the refilling moment, refilled to the pressure 320 bar at T=+50 ˚C (280 bar at T=+20 ˚C). These cylinders have a plastic sleeve of old variant.

 

 

Group D. Previously used cylinders, which have passed the necessary controls, over the 2 years, but younger than 5 years at the time of refilling, refilled to the pressure of 320 bar at T=+50 °C. These cylinders have an old variant plastic sleeve with special markings about refilling.

 

 

Group E. Previously used cylinders, which have not passed the necessary controls and/or over 5 years at the refilling time. These cylinders can be dangerous and its refilling is prohibited. “POISK Ltd.” is taking a decision on their further use only after special researches.

 

 

 

Our cylinders are composed of an inner metal shell, which produced from stainless steel 0,5 mm and the plastic pressure shell, which made by winding the organic band impregnated with epoxy composite.

 

 

After hydraulic and pneumatic testing
inner side of the cylinder is thoroughly cleaned
and new special valve sets up in its connecting branch.

 

 

Such cylinders should be filled now only with the special refueling system, it excludes the illegal refilling. “POISK Ltd.” is not responsible for cylinders, which filled illegal.

 

 

 

 

Cylinder, which filled legal, have special holographic sticker on the valve’s protective cap.

 

 

Each user can send us a request about where and when was legally filled his cylinder - it is necessary to tell us its personal number. Unfortunately, we can not stop people, who refill and sell our cylinders illegal. We can only give you some advices that will minimize the risk that such people compromise the other:

 

 

 

1. Before baying or start using the cylinder:
- Wash hands and outer surface of the cylinder with warm soapy water and wipe them dry cloth. Try, if possible, to test everything outside, in the absence of other people and away from inflammable gases (propane, butane, etc.) and oil;
- Inspect the cylinder carefully - It should have number, knocked on the connecting branch. It must be installed the cap on the valve to protect the valve from damage and dirt, on the cap should be a holographic sticker. The cylinder must have a plastic packaging ("sleeve") with our label. Make sure that the "sleeve", the outer side of cylinder and valve fixing nut do not have visible physical damaged. Make sure reading a sticker that your cylinder is not older than 5 years (not exceeding the specified period). Weigh the cylinder and determine its oxygen mass. If the mass of the cylinder (oxygen) is decreased, it means that the cylinder was used, or it has leakage and deoxygenation.

 

 

 

 

According to the table on cylinder, you can determine the oxygen cylinder’s pressure. If everything is all right, you can go to the next stage, if it is not – do not compromise yourself and life of other people;

 

 

- open the protective cap (cap away in a pocket with zipper) and inspect carefully the screw-thread and sides of valve. Not allowed any visible damage – especially on the face of valve, as well as being of any dirt;

 

 

 

 

- if dirt or defects is not found, you should test an operability of valve. To do this, take serviceable and tested reducer (see paragraph 2), unscrew from it the protective cap (cap away in a pocket with zipper) and connect it to the valve. Tighten the reducer with hand force (similar to the fuel tank cap of your car). Install oxygen filling to "0". Ensure aurally that oxygen does not flow through the sealing reducer. Allowed to plunge closed reducer in a bucket full water to make sure that it is watertight. After such testing wipe the reducer with dry napkin and blow it at the maximum oxygen consumption - 4 liters / minute. Make sure that the oxygen do not leak from closed oxygen reducer, from its connecting branch (bayonet lock), in the same way as you test leakages of the nipple swap wheels of your car. Determine the pressure in cylinder on the manometer of reducer. Compare the results with the weight of the cylinder and oxygen in cylinder and ensure that the manometer data are correct;

 

 

- if you dispose the device of measuring the gas flow (better is - oxygen flow indicator), connect it to the bayonet reducer and check that the actual flow data suit to the reducer data. Differences are allowed up to 10%. Remember that increasing height (drop in barometric pressure) may increase oxygen consumption of the reducer (Liters) significantly;

 

 

- connect to your reducer the mask (bayonet connector should work easy, without any difficulties). Set up on the reducer flow from 0 to 4 liters per minute alternately. Make sure that the flow indicator changes its position smoothly from minimum to maximum and back again. Flow indicator, hose, bayonet connectors, and all elements of the mask should not have visible mechanical defects. Wear the mask and make sure it is tight (hermetically) adjacent to your face, if necessary, adjust the pressing force with mask’s straps. If your mask has an economizer in the form of an elastic bag you need to test its integrity (see the description of the mask, Paragraph 3). Remember that the mask is the personal equipment and need to be contain the constant hygienic care. Avoid viral and infectious diseases and try not to use other people's masks and not let anyone use your mask (even take in hands);

 

 

- most important is – disconnected from the cylinder’s valve the reducer. Make on reducer maximum flow (4 L/ min) and start to unscrew the reducer till the hand of manometer being go to the 0 degree (1-3 reducer’s turnover). When manometer data reach the 0 position, you can unscrew the reducer completely. Do not forget install the protective cap on the cylinder’s valve (with a wrench) and reducer (manually).

 

 

- The date and results of this control write on the cylinder with permanent marker. Cylinder, which passed these control, is ready to use. If you have any questions during tests – contact us at poisk-ltd@bk.ru , phone number is +7-812-309-10-11 (12, 13) or +7-921-948-39-31.

 

 

Results of illegal refilling of a cylinder
These pieces of a cylinder were collected in a radius of about 100 meters.

 

 

2. We produce now two reducers’ types - one type still the same as in a past, and the other type of reducer which you can connect several masks at the same time. The reducer has its personal number and takes the whole testing.

 

 

 

 

About reducers

 

 

It is a lot of combined pressure regulators for medical oxygen produced in the world. Such regulators are usually made up of the stopping cylinder valve, pressure regulator and pressure flow regulator, all in one corps. Their main drawback is a small value of the input pressure (200-250 bar), weigh (0,5-1,5 kg) and the constraint on the operating temperature (-10 - 0 ˚ C).

 

 

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viproxy.it

 

Our reducer’s weight is 320 Gramm and its operating temperature is - from -35 °C till +40 °C.

 

 

3. It is very easy to assemble and disassemble the mask that makes the possibility to sterilize all of its elements and easily to replace them in case of mechanical damage. All materials of mask are replaced by modern materials, more eco-friendly and resistant to low temperatures (see the description of the mask in our website).

 

 

 

 

About masks

 

 

Note that the most important characteristic of each climbing masks is its isolation from the ambient space, where there is a mix of oxygen with breathing air and creates the necessary overpressure. The major components of a breathing mix are oxygen and carbon dioxide. The first component supports all the oxidation processes in the body, and the second one - is the main stimulant of breathing activity of a person. For this purpose is used the space between the face and mask and supplementary air spaces (breathing tubes of large diameter, plastic containers, elastic hermetically sealed bags of different sizes, etc.). At low temperatures such "extra space" have a significant drawback - the condensation of moisture from the breath air and the formation of frost or ice on the inside of mask. The large sizes of these «extra spaces» caused great inconvenience by using, especially in strong winds, as well as limit the review, if formed directly in the mask. In addition, the mask should not cause much resistance by breathing. The intensity of the absorption of oxygen from the breathing mix during breathing (lung ventilation) is low, especially with frequent of breath. Therefore, not assimilated oxygen breathed back into the undermask’s space and extra space and, if the construction of mask and the value of the oxygen supply are not optimal, then an excess of breathing gas exhaled in an atmosphere, and the Oxygen is not used successfully.

 

 

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08.02.2013 03:18