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This section provides a variety of useful information about gas welding, cutting and brazing that can be interesting to our customers and partners.

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Powerful propane cutting torches, operating with cylinders PDF Print
Monday, 02 September 2013 14:42
Powerful cutting torches and burners working on propane, for example RPM "DONMET" 502P, is designed to work on the gas pipe line or gas manifold with the number of cylinders no less than 3 pcs.
Work from one propane cylinder is not permissible!
Gas intake from the cylinder V=50 litres should not exceed 1.5 m3/h (at room temperature +25 оС). Otherwise the liquid fraction of gas in the cylinder boils and thrown into the pressure regulator, into the hoses and cutting torch. This leads to the burnout of mixer tube of the cutting torch. During liquid fraction boiling its temperature decreases sharply and it freezes. Gas vapor pressure falls almost to "0" in the cylinder and operating of the cutting torch becomes impossible.
Autogenous equipment travelling seminars. PDF Print
Monday, 15 July 2013 00:00

Dear Sirs!

The specialists of plant “DONMET” conduct travelling seminars for autogenous equipment.

Conditions for the seminar:

Flashback arresters Donmet (video) PDF Print
Wednesday, 26 June 2013 08:53

This video shows you how to protect yourself when oxy-gas cutting, welding, brazing and other flame machining.
The purpose of this video – to prevent accidents associated with rupture of rubberized fabric hoses, pressure regulators, and the explosions of cylinders.
Accidents can happen anywhere, and your workplace is no exception.
Flame machining is one of the most common methods of treatment of steels. However, a mixture of oxygen and fuel gas is very explosive.
In breaking of the working instruction through lack of attention or even stupidity, accidents may occur that leading to serious consequences.
The danger of any mixture of oxygen and fuel gas is often underestimated.
For various reasons the flame may penetrate through the cutting torch into the hoses and further into the cylinder through a pressure regulator. This phenomenon is called a back flash.
Back flash can lead to disastrous consequences!
If back flash occurs, flashback arrester DONMET will save your life and lives of the people next to you and also it will protect your equipment.
When the flame penetrates into the hose, it must be extinguished immediately.
Each flashback arrester includes 2 degrees of protection: flame arrester and check valve.
The possible backflow of fuel gas or oxygen stops with spring of the check valve.
Metal-ceramic insert serves an obstacle to the penetration of the flame. The insert has microporous structure with pore size of less than 40 micron which does not allow the flame to spread beyond its borders.
Flash back arresters are reliable protection from the back flashes. It’s certified in Ukraine and Russia. 100% of flash back arresters DONMET are tested for leaks and flash back resistance.
Many flame cutting torch operators and welders rated the quality of flash back arresters DONMET.
This small investment would save huge amounts of money and health in the future.

The principle of operation of the cutting torch R1 "Donmet" 150 (video). PDF Print
Wednesday, 26 June 2013 07:59

This video shows the principle of operation of the cutting torch R1 "Donmet" 150.
The cutting torch R1 "Donmet" 150 is designed for hand oxy-gas divide cutting (nesting pattern) of sheet and high-quality metal of low-carbon steels. Cutting thickness – up to 100 mm.
The given cutting torch is a serial product of DONMET Autogenous Equipment Plant Ltd. and it is in free sale.
Product is certificated in Ukraine, Russia and Belarus.
The author of a film: design engineer Artem Kotlyarov.

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