Dry fuse – type M-2 M-3
Code / 27011
Code / 27013
Dry fuse – type M-2 M-3 for machine
ACETYLENE, PROPANE-BUTANE, NATURAL
GAS AND OXYGENE cutting torches
Application
Dry flame-protection fuses applied to the M-2 and M-3 machine
cutting torches are used for the protection of machine cutting
equipment and the cutter itself from reverse flame-blow. They
are only attached to machine cutting torches – to each gas
supply line. They can be used while welding and acetylene,
propane-butane, natural gas and oxygene cutting.
M-2 and M-3 fuse operation features
As soon as the gas enters the fuse, a non-return valve (1)
opens and the gas continues to flow through a sintered insert
(2) and cartridge carrier openings towards the machine cutting
torch. Gas flow direction is shown with the arrow which can be
seen on the fuse body.When the reverse flame-blow happens
because of the explosion which occurs at that same moment, the
pressure within the fuse increases. The pressure activates a
non-return valve, closes it and prevents further gas flow
through installations or bottles.The reverse flame-blow
reaches the space between the sintered cartridge and fuse
body, and while the gas flows through the sintered insert, it
slowly cools down and, since the further gas supply is
blocked, it goes out and prevents further spreading of the
flame.In this way, the basic purpose of M-2 and M-3 fuses is
put into effect.
Maintenance
The fuse should be exposed to a reverse flame-blow at least
once a year. If the gas flow significantly slows down, the
fuse should be replaced with the new one. All fuse repairs are
performed exclusively by the manufacturer.
Special remark
Each fuse was tested with regard to its clamp susceptibility
( M-2 and M-3 – 10 bars ) and to at least three reverse
flame-blows. A dry fuse – type M cannot replace a water fuse.
The product was tested according to the JUS K.M