REITEL RETOCAST T User manual

Operating Instructions
LABORATORY EQUIPMENTIN
STAINLESS STEEL
RETOCAST T
REITEL Feinwerktechnik GmbH
Senfdamm 20 - 49152 Bad Essen
Phone: [phone] - Fax: [phone]
http://www.reitel.com - [email protected]

II
Dear Customer!
The RETOCAST T flame casting centrifuge is a space-saving benchtop unit with a double
wall stainless steel housing and electronic timer for precision casting that is suitable for both
precious and non-precious alloys and model casting. The proven technology of a centrifugal
arm, in combination with different starting speeds and timer control ensure that alloys are
cast even into the thinnest cavities within the casting ring, excluding metal waste.
Any other use or usage beyond this scope is considered unintended use. The manufacturer
shall not be responsible for any damages that may result thereby.
Prior to installation of the device operating instructions and especially the safety instructions
must be read and followed by all personnel who use this device.
After having unpacked the device, please check carefully whether transportation damages of
any kind have occurred. If that is the case, the carrier or manufacturer must be notified within
3 days. The company will not be responsible for any damages found after that.
These operating instructions must be read and followed by all personnel who use this device.
Store it at a safe place near the device. This documentation is protected by copyright.
Transmittal or reproduction of this document in whole or in part and disclosure of its contents
is not permitted. If the operation manual gets lost an extra copy can be ordered from the
manufacturer.

III
INDEX
TECHNICAL DESCRIPTION......................................................................................... 41
BASIC EQUIPMENT....................................................................................................... 41.1
SPECIAL ACCESSORIES................................................................................................ 41.2
DEVICE COMPONENTS ................................................................................................. 51.3
TECHNICAL DATA........................................................................................................101.4
SAFETY NOTES..........................................................................................................112
GENERAL SAFETY NOTES ...........................................................................................112.1
SPECIFIC SAFETY INSTRUCTIONS ................................................................................122.2
SAFETY INSTRUCTIONS FOR HANDLING OF GASES.........................................................122.3
SAFETY INSTRUCTIONS FOR PRESSURE REDUCER ........................................................132.4
INSTALLATION ...........................................................................................................143
GAS INSTALLATION PROPANE/OXYGEN.........................................................................143.1
INSTALLATION OF GAS SUPPLY NATURAL GAS/OXYGEN ..................................................153.2
OPERATION................................................................................................................154
TORCH HANDLING AND GAS ADJUSTMENT.....................................................................154.1
FLAME ADJUSTMENT...................................................................................................164.2
HOW TO IGNITE A TORCH USING A GAS ECONOMIZER.....................................................164.3
HOW TO PUT THE TORCH DOWN AGAIN.........................................................................164.4
PLACING THE TORCH ON THE HOLDER OF THE GAS ECONOMIZER ...................................164.5
CASTING PROCEDURE ................................................................................................164.6
TROUBLESHOOTING .................................................................................................185
MAINTENANCE...........................................................................................................196
WARRANTY.................................................................................................................207
DISPOSAL REGULATIONS ........................................................................................238
SPARE PARTS LIST ...................................................................................................249
EC-CONFORMITY DECLARATION.............................................................................2610

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Technical Description1
Basic Equipment1.1
RETOCAST T Flame casting centrifuge with electronic timer
1 melting crucible (normal)
1 lid opener for manual opening
Special Accessories1.2
Order-No.: 20509 Melting crucible normal (5 pcs./pack)
Order-No.: 20510 Melting crucible extra deep (5 pcs./pack)
Order-No.: 20501 Melting kit (propane/oxygen)
Order-No.: 20518 Melting kit (natural gas/oxygen)
Order-No.: 20502 Gas economizer propane
Order-No.: 20512 Gas economizer natural gas
Order-No.: 20506 Melting device for noble metal and non-precious metal
Order-No.: 20506.1Melting device for noble metal
Order-No.: 20514 Torch handle propane
Order-No.: 20514.1Torch handle natural gas
Order-No.: 20507 Universal insert (propane/oxygen), for melting and soldering
noble metal and non-precious metal
Order-No.: 20507.1Universal insert (natural gas/oxygen), for melting and soldering
noble metal
Order-No.: 20503 Solder insert, 0,5 mm nozzle
Order-No.: 20504 Solder insert, 1,0 mm nozzle
Order-No.: 20505 Mikroflam propane, incl. 3 precision needles, for soldering
Order-No.: 20505.1Mikroflam natural gas, incl. 3 precision needles, for soldering
Order-No.: 20516 Solder insert propane, with 3 changeable nozzles
Order-No.: 20516.1Solder insert, natural gas, with 3 changeable nozzles

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Device Components1.3
1 Lid support
2 Control lamp „Ready for centrifugation"
3 Button „START“
4 Locking bolt
5 Locking block
6 Power switch
7 Selector switch for starting speed
8 Timer
9 Timer display
10 Emergency switch
11 Overload fuse for lid opener
12 Device’s fuse 4A –delayed action (2 pcs.)
13 Solder insert
14 Locating fork
15 Torch valve:oxygen
16 Torch valve: fuel gas
17 Torch handle
18 Pilot orifice
19 Securing spring for locating forks
20 Ignition flame controller
21 Bottle pressure gauge
22 Thumb screw for pressure setting
23 Bottle pressure display
24 Connecting nut for oxygen bottle
25 Connecting nut for gas bottle
26 Shut-off valve pressure reducer
27 Flashback and burst pipe preventer with hose coupling
28 Melting crucible holder
29 Casting mould table
30 Isolation on rear of mould
31 Counterweight
32 Toothed counter holder/snap-in hole
33 End stop curve for counterweight
34 Height adjustable casting mould table

6
Top view
Control panel
Back of the device
2
3
1
6
7
8
9
10
11
12
4+5 (hidden)

7
Gas economizer
Pressure reducer
Interior of the unit
18
19
20
27
26
31
32
33
34
23
24
14
17
22
28
29
21
13
15
30
16
25

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Torch handle natural gas
Torch handle propane
Flame adjustment
Gas bottle installation
hard flame
(excess oxygen)
neutral flame
(normal)
soft flame
(propane/excess natural gas)
bottle valve
gauge
operating pressure propane
non-return valve for propane
left-hand thread
red hose
pressure adjusting screw

9
Oxygen bottle installation
The flame casting centrifuge is suitable for the following moulds:
No.
Diameter
[mm]
Steel cylinder
Length
[mm]
Weight + / -10%
[g]
1
3
6
9
30
48
65
80
yes
yes
yes
yes
55
55
55
55
75
200
400
600
Using other mould systems adjust the counterweight according to your own experience and
after test trials, possibly referring to the weight of the standard rings.
gauge bottle pressure
gauge working pressure oxygen
blocking valve
non-return valve
blue hose
pressure reducer
pressure adjusting screw

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Technical Data1.4
Line voltage
230 V/50-60 Hz
Current consumption
500 W
Height/width/depth
350(800)/710/550 mm
Weight
44 kg
Speed
500 rpm
Mould size
1-9 an model casting
Capacity:
noble metal130 g
non-precious metal 60 g
Material
noble metal/non-precious metal/model
casting
Centfiugal time
programmable
Starting speeds
3
Sound level
≤70 dB(A)
Housing
stainless steel and white stove-enamelled
steel
Order-No.:
10502
Made in Germany (Subject to modifications)

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Safety Notes2
General Safety Notes2.1
All equipment undergoes final inspection and testing before leaving our factory. However,
if equipment is damaged during shipping or through any other circumstances, it must not
be used in service. Please check the device regularly for damages. Damaged parts
should be replaced immediately.
All power/air/water/gas sources should be rated for the demands of the device as listed in
the technical data sheets. Maximum ratings must not be exceeded. All VDE (Verein
Deutscher Elektro-Ingenieure) standards should be followed. Equipment should be
grounded according to standards.
Adherence to valid regulations regarding necessary checks (e.g. according to Accident
Prevention & Insurance or electrical equipment) is exclusively taken over by the
buyer/user of this product.
This device has been designated to be used only for its intended purpose. All other
applications must be prohibited for safety reasons as otherwise the manufacturer’s
warranty expires.
The device should be set-up in a clean, well-ventilated room, if necessary under a hood.
Supporting surfaces should be straight, flat and adequately stable.
Don’t place anything on top of the machine.
To avoid injury, appropriate protection should be worn (e.g. gloves, safety glasses, safety
shoes, hearing protection etc.)
If the machine is defective or working improperly it must be taken out of service. In case
of further use of the machine the owner will be held responsible for any consequential
damage.
To prevent accidents from water, fire or explosion, all power/air/water/gas sources should
be turned off after working hours and during breaks, and secured against unauthorized
access.
When carrying out maintenance works or repairs or when opening the device always turn
off the main power switch and unplug the whole unit.
Repairs should be carried out only by the manufacturer or by qualified and certified
personnel appointed according to chapter 7 –warranty.
In case of leaking water out of housing or tank shut down device and call service.
Check all hose connections for leak tightness, if necessary tighten hose clamps again.

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Specific Safety Instructions2.2
The RETOCAST T is a benchtop unit. Place the machine on a flat, level and stable
surface so that the device won’t fall down from the surface in case of improper
counterweight adjustment (unbalance).
Please make sure that the device is only taken into operation with a closed lid.
Always use pliers when inserting or taking out the mould or the melting crucible because
of danger of being burnt.
Never open lid before the centrifugal arm has totally stopped. Do not reach into running
machine. Danger of injury.
Safety Instructions for handling of gases2.3
Don’t store any explosives, highly flammable or burnable materials in the work area.
Be careful when handling gas and oxygen bottles. Don’t heat them up or throw them and
take care that they won’t fall down.
When working with gases it’s important that the necessary installation works are carried
out by a gas fitter.
Don’t touch or heat other parts and living beings than crucible and melting material with
the flame.
The torch has to be stored the way that it would be impossible that anything else catches
fire.
Always wear suitable goggles and gloves when working with the torch.
Only connect gas type and gas connections according to operating instructions. Warning:
Danger of explosion if improperly handled. Make sure that the gas connection is
absolutely tight and check this regularly.
Always close main valves at gas bottles and gas supply after melting procedure.
Warning:
Propane is heavier than air and therefore, when accumulated it can catch fire.
After casting, remove all muffles and other heat exposing materials from the machine
and let it cool down for at least 10 minutes while lid is being opened.

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Safety Instructions for pressure reducer2.4
Parts in contact with oxygen must not come into contact with oil or grease.
The relief valve adjustment must not be changed.
Take care that sealing surfaces, connection seals and gauges are always in perfect
condition.
In case of failure take the pressure reducer immediately out of service and shut the gas
bottle valve.
Pressure reducers may only be used with appropriate gas type.
Pressure reducers are to be used gas-specific for gas bottles with a max. filling pressure
of 200 bar.
Pressure reducers may not be modified without permission of the manufacturer and are
to be used at the specified ambient temperature.
Pressure reducers may not be operated with adapters between gas bottle valve and
pressure reducer inlet.
Improper use of the pressure reducer may result in damage, endangering users or other
persons.
Pressure reducers shall be used in compliance with the accident prevention regulations
UVV for welding, cutting and allied processes (VGB15).
Pressure reducers are subject to regular visual inspection. According to the Industrial
Safety Regulations the commercial user is responsible for this.

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Installation3
The electrical equipment is being delivered fully installed. The sealed plug can be connected
directly to the mains supply 230 V/16 A. For installation please refer to Safety Notes in
chapter 2.
Gas Installation propane/oxygen3.1
1. Clean the connectors of the propane gas bottle by means of oil-free compressed air prior
to connection to the pressure reducer.
2. Briefly open bottle valve of the oxygen bottle prior to connection to the pressure reducer,
in order to blow out impurities.
3. Check the gas bottle’s thread for damage.
4. Connect pressure reducer with connecting nuts (24)+(25) to the closed gas bottle valve
and tighten with a flat wrench.
(oxygen: right-hand thread; propane gas: left-hand thread)
5. Check whether the shut-off valve (26) is closed.
6. Completely unscrew T-screw for pressure adjustment (22) to completely relieve pressure.
7. Ensure gas-tight connection of the supply hose to the hose coupling (27).
8. Slowly open the gas bottle valve. Oxygen bottle pressure is indicated on the pressure
gauge (21).
9. Use the T-screw (22) to adjust working pressure. The adjusted working pressure is
indicated on the bottle’s pressure gauge (23).
10. Slowly open the shut-off valve (26) of the pressure reducer.
11. In case of free flow a pressure drop might occur. Use the T-screw (22) to readjust
pressure.
Note:
Properly arrange gas supply according to description. Fasten the screws tightly. Follow the
safety instructions in chapter 2.

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Gas pressure settings according to chart:
Oxygene
2,5–3,0 bar
Propane
1,0–1,5 bar
Natural gas
depending on gas line 300 mbar–500 mbar
12. For bottle replacement unscrew the pressure reducer from the bottle valve. The pressure
reducer must be depressurized to prevent damages!
Installation of gas supply natural gas/oxygen3.2
1. Installation of the oxygen bottle according to parameters described in chapter 3.1.
2. Using natural gas, attach the fuel gas hose at the gas economizer directly to a fuel gas
fitting (left-hand thread).
In Germany there’s no need for the customer to install a pressure reducer and a flashback
preventer since this is already installed by the gasworks.
Operation4
Torch handling and gas adjustment4.1
1. Open the valves at the propane and oxygen bottle or open natural gas supply. Pressure
gauge (21) indicates the pressure.
2. Hold the torch handle (17) in your hand. If a gas economizer is available, take the torch
off the locating fork (14) of the gas economizer. The locating fork (14) is unlocked by
unlatching the securing spring (19).
3. Gas pressure settings with opened valves on the torch’s handle (15)+(16) according to
chapter 3.1.
4. After finishing work close gas. Close bottle valve and shut-off valve (26). Ensure that the
residual gas is completely discharged.
5. Completely unscrew T-screw for pressure adjustment (22) to completely relieve pressure.

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Flame Adjustment4.2
1. Ignite the flame at the tip of the solder insert (13) with a gas lighter.
2. Adjust the flame with the valves on the torch’s handle (15)+(16) until the flame is hissing
and blue (refer to chapter 1.3 Flame adjustment).
How to ignite a torch using a gas economizer4.3
1. Open ignition flame controller (20) and use a gas lighter to ignite the gas at the pilot
orifice (18).
2. Ignite the torch at the pilot flame from below.
How to put the torch down again4.4
1. Before putting down the torch again, close the fuel gas valve (16) and the oxygen valve
(15) on the handle.
2. Close the valves at the propane and oxygen bottles or if applicable close the gas line.
Placing the torch on the holder of the gas economizer4.5
1. Put the torch onto the holder (14). Press it down (14) until it’s secured by the clamp (19).
2. Don’t change the valves‘ adjustment on the torch’s handle. The gas economizer
eliminates repeated adjustment of the torch flame.
3. Before putting the torch onto the holder of the gas economizer close the fuel gas valve
with the connecting nut (25) and the oxygen valve (15) on the torch’s handle.
4. Close the valves at the propane and oxygen bottles or if applicable close the gas line.
Casting Procedure4.6
1. Open valves of gas and oxygen bottles (see chapter 1.3 Device Components).
2. Turn power switch (6) to position „I“.
3. After 15 seconds the lid opens.
4. Adjust the counterweight (31) for the moulds (sizes 1-12 are matching with the steel ring
mould system). Adjust the mould size 1-12 and end-stop curve (33) the way that the rest
hole (32) of the counterweight can slip into the nose of the stop curve (33).
5. Adjust the casting mould table (29) according to mould sizes 1-12. Adjust the height of
the lever (34) so that the neck of the melting crucible is exactly aligned with the mould’s
funnel.
6. Adjust starting speed, press switch (7):
„0“ = especially gentle start (for gypsum based investment material);
„I“ = gentle start (for noble metal);
„II“ = quick start (for non-precious metal).

17
7. Set centrifugal time with the keys (+) and (-), min. 20 sec.
8. Insert pre-heated melting crucible. (New melting crucibles should perhaps be glazed with
melting powder before being used.)
9. Fill in weighed metal quantity (maybe use an alloy tray and add a little melting powder).
10. Take the torch up (according to chapter 4.1). Ignite and adjust the flame.
11. Heat the metal up to red heat. Keep a distance of at least 70 mm to the flame until it
starts melting.
12. Use pliers to take the mould out of the furnace, put it onto the adjusted casting mould
table (29). Slide the crucible forward.
13. Heat metal up to the casting temperature. (Some experience necessary: Please make
some trial castings at different temperatures and reheating time.)
14. Start casting procedure: Close the lid and press key „START“(3) in lid’s support (1) at the
same time. The control lamp (2) shines, casting is started.
15. Turn the torch off and if applicable also the gas economiser (see chapter 4.4 und 4.5).
16. After the set time has elapsed (lid will unlock itself after 15 sec.), take out the mould with
the casting object. If machine shall be stopped earlier: press the Mode key of the timer
switch.
17. After finishing work turn power switch (6) off to „0“ and close gas and oxygen bottles.

18
Troubleshooting5
Unit doesn’t start.
a. Check the building’s main fuse.
b. Check the device’s fuse.
Burner bangs when gas supply is
interrupted.
Check pressure at pressure minimizer.
Locating fork (14) of gas economizer is not
fully pressed down try to lower the lock.
Not enough oxygen pressure, flame comes
back 
Burner’s tip is molten.
Not enough oxygen pressure.
Flame isn’t adjusted correctly, burner comes
too close to the metal Take care that the
minimum distance is 60-80 mm.
Casting model is not fully filled up.
The metal is not liquid enough no
homogeneous melting. Check investment:
casting channels, feeder and so on.
Metall won’t become liquid.
Maybe wrong burner check gas pressure
and the flames (see chapter 1.3).
Porous casting model structure.
Metal might be overheated. Melting time was
too long shorten melting time.
Loss in metal.
Crucible neck and mould funnel are not
aligned try extra deep melting crucibles
(from about 40 g material).
Return spring at centrifugal arm might be
broken replace it. Centrifugal arm no
longer low-friction Contact customer
service.
Centrifuge runs jerkily.
Adjust the counterweight so that it runs
smoothly (see chapter 4.6).
Centrifugal process doesn’t start.
Check switch on lid, timer (8), device’s fuse
(12) and power supply.
Lid doesn’t open.
Press overload protection (11) on the rear
side of the device. Locking bolt (4) may be
stuck or locking bolt’s support (5) has to be
re-adjusted. Open lid by pressing the bolt
back (4) when opening the lid use tools sent
with the machine.

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Maintenance6
Regularly check the device. Pay attention to visible damages to the housing, power cord
or pressure tubing.
Regularly clean or hoover the centrifuging chamber.
Change isolation on rear of mould (30) when worn.
Clean the housing regularly with a damp cloth or with REITEL stainless steel care spray.

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Warranty7
We, REITEL Feinwerktechnik GmbH, offer a 1 year’s warranty beginning from the proven
date of purchase. This warranty covers all defects traceable to materials, design or
workmanship. The following warranty regulations are applicable:
Within the warranty period Reitel Feinwerktechnik GmbH or an authorized distributor agrees
at its sole option, to perform repair or replace this product at no charge covering all defects
traceable to materials, design or workmanship. Warranty only applies to appropriate use and
regular maintenance of this product according to the operating instructions. Claims under
warranty are restricted to complementary performance. Additional claims, especially claims
for indemnifications, are not covered by this warranty.
1.
Warranty claims have to be addressed to the distributor the product was purchased from or
directly to our service department.
Contact:
REITEL Feinwerktechnik GmbH
Senfdamm 20
49152 Bad Essen
Germany
Phone: [phone] (Service Department)
Phone: [phone] (Reception)
Fax-No: [phone]
2.
In case of warranty claim application the sales receipt or your purchase invoice showing the
date of purchase of the product and the serial number must be furnished. Securely pack and
ship the device, freight charges prepaid, at your own risk to us, along with a report describing
the defect. We reserve the right to decline warranty if this information has been removed or
modified after purchase of the product or if they are not included in case of warranty claims.
3.
Warranty repairs have to performed by REITEL Feinwerktechnik GmbH or by authorised
distributors. Repairs performed by non-authorised companies will void the claim for refund
since damages to the product resulting hereof are not covered by warranty.
4.