MIL-W-80027D
The type I machines shall include the
Gas shielding system.
3.4.6
necessary components to control the flow of the shielding gas through the
A timer with a fixed setting shall
welding machine and hose assembly.
of the arc for
control the flow of gas and water before the starting
purging of the torch. An adjustable timer shall control the flow of gas and
water after the arc has been extinguished to allow for protection of the
weld area while it is cooling and for cooling of the torch. The adjustable
timer shall have a range of delay time from a minimum of 6 seconds or less
The welding machine shall be fitted
to a maximum of 30 seconds or more.
with inlet and outlet gas connections in accordance with CGA standards.
Connecting hoses and gas pressure regulators are not to be furnished with
When specified (see 6.2.1) weld set in accordance with
the machine.
MIL-W-80105 shall be furnished with each machine.
3.4.7 Water cooling system. The type I welding machines shall be fitted
with the necessary internal components to control the flow of water through
When required (see 6.2.1), the
the welding machine and electrode holder.
unit shall have a water filter either internally or externally on the inlet
water connection. The inlet and outlet water connections shall have 5/8 -
18 LH threads. The machine shall be capable of operation with a water sup-
ply pressure of 172 KPA to 483 KPA (25 to 70 PSIG) at a minimum temperature
of
forced air. All ventilation openings shall be located and designed so that
water and dirt will not be drawn into the machine by the intake air in quan-
tities which will interfere with the useful service life of the machine.
The cooling fans shall have totally enclosed motors with permanently lubri-
cated bearings. The fan assembly shall be fastened to a rigid mount in such
a manner to withstand vibration encountered in this type of equipment. Fan
blades shall be of a material and design to prevent fatigue failure.
3.4.9 Solid state components. Solid state design shall be used through-
out for electronic components. The use of selenium or other similar aging
devices is permitted only for voltage surge protection to other solid state
components.
3.4.10
Control circuit voltage.
Auxiliary control circuits shall be
isolated from the input electric power supply by a low-voltage transformer
having a secondary voltage no greater than 115 volts.
3.5 Size and capacity. The welding machines shall have output ratings in
accordance with table I when connected to a resistance load having a power
factor of not less than 0.99.
8
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business