Clarke Weld AT100 Installation and operation manual

OPERATING & MAINTENANCE
INSTRUCTIONS
Part No: 8134140
GC0509
PRESSURE REGULATOR
For use with models AT100,130,131 & 150

2
INTRODUCTION
Thank you for purchasing this CLARKE Pressure Regulator.
Before attempting to use the product, it is essential that you read this manual
thoroughly and carefully follow all instructions given. In doing so you will
ensure the safety of yourself and that of others around you, and you can also
look forward to the product giving you long and satisfactory service.
GUARANTEE
This product is guaranteed against faulty manufacture for a period of 12
months from the date of purchase. Please keep your receipt which will be
required as proof of purchase.
This guarantee is invalid if the product is found to have been abused or
tampered with in any way, or not used for the purpose for which it was
intended.
Faulty goods should be returned to their place of purchase, no product can
be returned to us without prior permission.
This guarantee does not effect your statutory rights.
ENVIRONMENTAL PROTECTION
Do not dispose of this product with general household waste. All tools,
accessories and packaging should be sorted, taken to a recycling
centre and disposed of appropriately.
FUNCTION
This pressure regulator is ideal for use with most TIG welding machines, in
particular, the CLARKE AT welder range.
The function of the pressure regulator is to reduce and stabilise the pressure
of a gas supply stored in the cylinder. It is used to reduce the pressure to a
level which is suitable for use with standard welding equipment.
The pressure regulator has been designed to be used exclusively with the
type of gas, and at the pressure indicated in the Technical Specification on
page 7.
IMPORTANT: To use the pressure regulator with types of gasses and
pressures other than CO
2
or Argon could be dangerous.

3
GENERAL SAFETY PRECAUTIONS
IMPORTANT! In addition to the following precautions, you should read,
and fully comply with, all instructions and safety precautions that were
supplied with your Welder. Please keep these instructions in a safe
place for future reference.
1. Incorrect use of the pressure regulator can cause serious damage or
injury.
2. Always check that the regulator is the correct model for the type of gas
being used.
3. This pressure regulator must be treated as a precision instrument and be
protected from impact, dust, oil and dirt.
4. Never use the pressure regulator if it is not in perfect working order.
5. When drawing gas from the cylinder, it must always be stood upright and
be protected from falling.
6. Always ensure that any inlet connection gasket is in place and in good
condition.
ASSEMBLY
CONNECTION OF THE PRESSURE REGULATOR
Note; The numbers in brackets refer to the parts diagram on page 6.
1. Check to ensure the pressure regulator is correct both for the type of gas
and the pressure in the cylinder to be used.
2. Turn the pressure adjuster (4) fully anti-clockwise, (towards the - mark) to
ensure the pressure adjuster valve is closed.
3. Before screwing on the pressure regulator, ensure that the outlet is
absolutely free from any impurities or contamination.
4. Replace any gasket if damaged or lost (CO2applications ONLY).
5. Screw the inlet connection (2) tightly to the cylinder valve, using a suitable
spanner.
HOSE CONNECTION
1. Attach the hose to the hose outlet connection (5) and tighten with
suitable worm drive clamps (not provided), ensuring the connection is
tight.

4
INSTRUCTIONS FOR USE
OPENING THE PRESSURE VALVE
1. Check to ensure the regulator is completely closed (turn the pressure
adjuster knob (4) fully anticlockwise).
WARNING: OPENING THE CYLINDER VALVE TOO QUICKLY MAY CAUSE
THE GAUGE TO MALFUNCTION.
2. Turn the pressure adjuster (4) very slowly clockwise. The pressure gauge
(3) will indicate the outlet pressure.
3. To increase pressure, slowly turn the pressure adjuster (4) clockwise until
the reading on the gauge is at the pressure you require.
4. To decrease pressure, slowly turn the pressure adjuster (4) anti-clockwise.
5. As the gas is used up and the pressure drops, compensate by screwing
the pressure adjuster (4) clockwise to maintain the outlet pressure.
6. Outlet pressure must not be adjusted higher than the pressure you need to
use.
SHUTTING DOWN
1. ALWAYS release the pressure from the regulator when not in use, and
remember to turn OFF the gas supply as soon as you have finished
welding.
2. Close the cylinder valve (1).
3. Release the gas pressure, by operating the welding equipment until the
regulator gauge indicates “zero” and no more gas can be heard
exhausting.
4. Turn the pressure adjuster (4) anti-clockwise until it is completely closed.
Note; ALWAYS close the cylinder valve before attempting to change an
empty cylinder.
RELIEF VALVE
For safety reasons, the pressure regulator is equipped with a pressure relief
valve.
In case of malfunction, this valve allows gas delivered at excessive pressure
to escape.
WARNING: DO NOT TAMPER WITH THE PRESSURE RELIEF VALVE.

5
MAINTENANCE
Do not attempt to carry out maintenance or repairs yourself.
• Do not dismantle the regulator. Return it to your Clarke dealer for
servicing.
• Do not clean gauge lens with solvents/petrol etc.
MALFUNCTIONS
Do not use the pressure regulator if:
• The pressure regulator or any of its parts (gauge, inlet connection,
outlet connection) are damaged or dirty, oily etc.
• There are any leaky connections.
• The pressure relief valve has been tampered with, or is leaking.
• If the gauge malfunctions during use, (e.g. leaks) stop work
immediately and close the cylinder valve.
Return the regulator to your dealer to be checked and repaired.
CHECKING FOR LEAKS
Checking for leaks must be carried out only in the open air. Use soapy water
as a gas leak detector. Do not use a flame.
• Spray a suitable leak detector or apply soapy water onto the area
to be checked.
• The forming of any bubbles or foam is an indication of a leak.
STORAGE
The pressure regulator must be treated as a precision instrument. When it is
not to be used for long periods, store it in its packaging or in its box to prevent
contact with dust, oil and other sources of contamination.

6
PARTS LIST & DIAGRAM
Part No
1. Cylinder Valve (not included) N/A
2. Inlet Connection N/A
3. Pressure Gauge OTIR3001
4. Adjuster Knob OTIR3002
5. Outlet Connection OTIR3003
6. Regulator Body N/A
7. Gauge Lens OTIR3004
8. Safety Relief Valve OTIR3005

7
PARTS & SERVICING
MARKINGS
Product code markings can be found around the circumference of the
regulator body as follows;
1. K - Pressure reducer class (1)
2. N - Gas type
3. 091269 - Lot number
3. 230 bar - maximum inlet pressure (P1)
TECHNICAL SPECIFICATION
For parts & Servicing, please contact your nearest dealer, or
CLARKE International, on one of the following numbers.
PARTS & SERVICE TEL: [phone]
PARTS & SERVICE FAX: [phone]
or e-mail as follows:
PARTS: [email protected]
SERVICE: [email protected]
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