GAS-ELECTRIC BLOWTORCH DIMENSIONS

Boiler Business Group
GAS-ELECTRIC BLOWTORCH
GAS-COMPRESSED AIR TORCHES
Bulletin 4620/4696
January 2005
GAS-ELECTRIC BLOWTORCH
The 4620 Blowtorch is a lightweight, portable unit that can be easily taken to
the job site. The torch is used for soldering, brazing, preheating castings prior
to welding, preheating ladles, hardening or annealing, and countless other
heating jobs around your plant.
The 4620 Blowtorch capacity is 150,000 Btu/hr and comes complete with a
120/60/50 motor, gas and air controls, and a 4 foot stand. The blower motor
is easily serviced or repaired by your personnel. Available parts are listed
below.
Blower motor repair parts:
Motor brushes
P.N. R430-3805
Contact cleaner
P.N. R430-3810
Note: Motor is not rated for continuous
duty.
Pouring temperatures are easier to maintain
and ladle life is increased when foundry ladles
are preheated.
Preheating castings prior to welding will help
to insure a solid weld and save oxygen and
acetylene.
DIMENSIONS
inches
53/4
247/16
Air Shutter
173/16
113/16
48
max.
Stand
gas
/2 NPT
1
Air Shutter side
INSTRUCTIONS
1826-01
Gas Valve
wt. 35 lb, including stand
Blower Motor side
Torch height is adjustable to maximum of about 4' off floor.
1. Connect the gas inlet of the 4620 Blowtorch to a 2-8 osi gas supply using a 3/4" flexible hose that is rated for gas service. DO NOT use
common garden hose. Attach the hose securely with clamps. Plug the blower motor power cord into a 120/60 V ac outlet.
2. Close the blower air shutter. Place a propane torch or other source of flame at the burner nozzle. Slowly open the manual gas valve until an
18" long flame is produced.
3. Gradually open the blower shutter and adjust the gas valve until the desired flame is obtained. A purple tinted flame without body indicates
a lean (oxidizing) flame; a green tint indicates a rich (reducing) flame. Yellow or orange flames are highly reducing. The highest
temperatures and the best fuel economy result from a neutral (on-ratio) air/fuel mixture.
CAUTIONS: 1) Stand behind burner when lighting. 2) Do not leave unattended burner when firing. 3) In bright light flame can be
almost invisible.
Bulletin 4620/4696
Page 2
GAS-COMPRESSED AIR TORCHES
• portable
• handy
• effective
• intermittent
FIRING
PREHEAT
hand forging
spot heating
for soldering, brazing, welding
ladles and crucibles
dies
The 4696 Torch is a packaged unit that uses 40-80 psi compressed
air with low pressure gas to create a well defined, high velocity
flame that can be directed into relatively tight and deep chambers.
A gas-compressed air torch is far more effective than a raw gas
torch and has much more flexibility than torches using high
pressure gas inspirators.
CAPACITIES
with 60 psi air
Torch
natural*
gas
cfh
compressed
air
cfm
spud
drill
size
4696’s are used singly or in groups for a wide variety of industrial
heating jobs. They can be very effective for specific requirements
such as incinerator ignition, lighting a cupola coke bed, etc.
4696-1-A
4696-2-D
4696-4-C
4696-6-C
4696-7-C
90
188
615
1060
1670
2.3
3.4
10
23
35
55
52
34
19
6
The 4696 assembly includes gas and compressed air valves.
Flexible hoses feeding torches increase their usefulness. Air
register type nozzle mountings are available--see Bulletin
4682.
* Minimum gas pressure is 1"wc for natural gas.
LIGHTING
Initially, set air at about 10 psi; put lighting torch in front of nozzle;
slowly open gas valve until burner lights.
A–fpt
compressed
air
E
Increase gas and air flows until desired high fire rate is achieved
--60 psi air is standard.
Some users install an 1807 Limiting Orifice Valve between gas
cock and torch so cock can be wide open at high fire. In this case,
for initial lighting, adjust the 1807 Valve from closed to appropriate
high fire setting (with cock wide open). On subsequent lightings,
ease the cock up along with the air, until it is full open (the 1807
is permanently set).
C
Torch-type burners are designed to be used only for heating items
in the open. They do not have provisions for the mounting of flame
detection devices and other safety-related features required for
the firing of closed or covered enclosures or vessels that contain
the products of combustion and thus fall under the provisions of
the NFPA 86 Standard for Ovens and Furnaces.
B–fpt
gas
D
DIMENSIONS
inches
Torch
4696-1-A
4696-2-D
4696-4-C
4696-6-C
4696-7-C
A
B
C
D
E
/4
/4
1
/4
3
/8
3
/8
/2
/4
1
11/2
2
4 3 /8
4 5 /8
5 1 /4
6 5 /8
7 5 /8
33/16
39/16
3 3/ 4
413/16
53/16
153/8
173/4
221/2
323/4
373/8
1
1
1
3
wt,
lb
51/2
81/2
153/4
33
521/2
Note: Replacement nozzles are ordered as 4682-1-A/BO for
standard, 4682-1-AN/BO for alloy, etc.
When firing in the open, precautions are needed to protect
personnel and property from the flame, heat and products of
combustion generated. These precautions include but are not
limited to items such as operating instructions appropriate to
the specific task to which the torch is applied, operator training,
a suitable ignition source, heat shields, clamps to hold the torch
in the desired positions, safety ventilation, etc. Flexible hoses
rated for the intended fuel service are required. Valves for remote
fuel shut off and fuel flow limiting are recommended. The user
assumes complete responsibility for all aspects of using portable
torches.
DIMENSIONS SHOWN ARE SUBJECT TO CHANGE. PLEASE OBTAIN CERTIFIED PRINTS FROM FIVES NORTH AMERICAN COMBUSTION, INC.
IF SPACE LIMITATIONS OR OTHER CONSIDERATIONS MAKE EXACT DIMENSION(S) CRITICAL.
WARNING: Situations dangerous to personnel and property may exist with the operation and maintenance of any combustion equipment. The presence of fuels, oxidants, hot and cold
combustion products, hot surfaces, electrical power in control and ignition circuits, etc., are inherent with any combustion application. Parts of this product may exceed 160F in operation and
present a contact hazard. Fives North American Combustion, Inc. urges compliance with National Safety Standards and insurance Underwriters recommendations, and care in operation.
Fives North American Combustion, Inc. - 4455 East 71st Street - Cleveland, OH 44105 USA - Phone 216.271.6000
Fax 216.641.7852 - email: fna.sales@fivesgroup.com - www.fivesgroup.com/fivesna
1-05-B4620/4696