Sealey Sga4.V2 Instruction Booklet

instructions for

MPORTANT:

PLEASE READ THESE INSTRUCTIONS CAREFULLY. NOTE THE SAFE OPERATIONAL REQUIREMENTS, WARNINGS & CAUTIONS. USE

THE PRODUCT CORRECTLY AND WITH CARE FOR THE PURPOSE FOR WHICH IT IS INTENDED. FAILURE TO DO SO MAY CAUSE DAMAGE AND/OR

PERSONAL INJURY AND WILL INVALIDATE THE WARRANTY. KEEP THESE INSTRUCTIONS SAFE FOR FUTURE USE.

acetylene regulator

model no: Sga4.V2

thank you for purchasing a Sealey product. Manufactured to a high standard, this product will, if used according to these
instructions, and properly maintained, give you years of trouble free performance.

Refer to

Instructions

Warning

Explosive

Material

Wear

Protective

Clothing

Wear Welding

Mask

Wear

Protective

Gloves

Wear

Safety

Footwear

1. Safety inStructionS

9 Always have a re extinguisher nearby.
8 never use acetylene gas to blow soot or dirt from your clothes.
8 Do not wear ragged clothes, as sparks can ignite the ragged or loose ends.

9 Secure cylinders to cart, wall or post to prevent them from falling.

9 All cylinders should be used and stored in an upright position.
8 Never drop or strike a cylinder. Do not use cylinders that have been dented.

9 Cylinder caps should be used when storing or moving cylinders.

9 Empty cylinders should be kept in specied areas and clearly marked “EMPTY”.
8 Never use oil or grease on any inlet connections, outlet connections or cylinder valves.

9 Examine hoses for cuts, burns or worn areas before each use. Also inspect ttings for damage. If any damage is found, replace

immediately.

9 Keep all threads and unions clean and free from oil, dirt or grease.
8 never apply oil or grease to any thread.

9 for safety advice regarding gas bottles refer to the supplier of the bottles.

9 make sure the bottle key is in place at all times so that in the event of an emergency the cylinder valve can be turned off quickly.

9 Check all joints weekly to make sure there are no leaks. LEAKING HOSES CAN KILL.

9 Remember at all times RED = ACETYLENE “A”

BLUE = OXYGEN “O”

9 Acetylene ttings have a reverse, left-handed thread.

9 This regulator has no user-serviceable parts. All repairs/calibrations must only be undertaken by a BCGA approved service agent.

9 In case of backre or ashback immediately turn off all cylinders.

2. introDuction

twin gauge regulator to BS EN 2503,2009 complete with bull nose adaptor and 3/8” BSP hose union. Displays bottle pressure and working

pressure for Acetylene gas. This type of regulator is intended to control the ow of acetylene gas in an oxyacetylene gas welding & cutting set­up and should be used for no other purpose and with no other gas. The person using this regulator should be fully trained in all aspects of gas
welding and cutting including setting up, operation and safety procedures.

3. Set up

NOTE: PRESSURE REGULATORS SHOULD BE TREATED AS PRECISION INSTRUMENTS AND SHOULD NOT BE JARRED OR
KNOCKED.

 Warning! Danger of eXploSion. All parts which come into contact with acetylene, including hands and tools, must be free from

oil or grease.

3.1. function of the regulator.

3.1.1. Fitted to the outlet of the gas cylinder valve, the pressure regulator reduces the pressure of the gas from cylinder pressure to the
constant lower pressure required for the operation of the equipment. Pressure reduction within the regulator occurs in a single stage.

3.2. preparing the cylinder.

3.2.1. Make sure that the cylinder to be used is safe and properly secured as noted in the safety precautions.

3.2.2. Whilst standing to one side “crack” the cylinder valve. “Cracking” is to quickly open and close the valve allowing gas to escape and
clear the valve of any foreign bodies.

 Warning! If grease or oil is found, cease use of cylinder immediately and contact your gas supplier.

3.3. attaching the regulator.

3.3.1. Ensure the inlet lter is in place and is not blocked or contaminated.

If an ‘0’ ring is tted to the inlet, check for damage and replace if necessary with an ‘0’ ring recommended by the regulator
manufacturer. Do not use any form of jointing paste or tape between regulator and cylinder valve. Before attaching the regulator wipe
the tting with a clean dry cloth. Screw the union at the base of the regulator to the cylinder by hand. Ensure that the gauges are
correctly orientated so as to be seen properly by the operator. The regulator to cylinder tting has a reverse left handed thread. To
tighten turn anticlockwise. A wrench should be used to ensure tight connections.

© Jack Sealey Limited

Original Language Version

sGA4.V2 | Issue 1(L) 15/04/16

3.3.2. Close the regulator by turning the adjusting knob anti-clockwise to relieve the pressure on the diaphragm before opening the cylinder
valve. If this is not done, pressure from the cylinder can damage the diaphragm and render the regulator inoperative.

3.3.3. The cylinder valve-to-regulator connection should be checked for leaks using an approved leak detection spray or water and soap
solution. Stand so that the cylinder valve is between you and the regulator. Slowly open the cylinder valve.

3.4. Connecting a ashback arrestor.

3.4.1. According to safety regulations, when regulators are used with acetylene, it is compulsory to use a ashback arrestor. This should
be connected directly to the gas outlet on the regulator as shown below and the gas hose should then be tted to the ashback

arrestor. The ash back arrestor should be colour coded RED for ACETYLENE and has to be tted the right way round. It will have

the direction of ow marked on it. Follow the instructions provided with the arrestor. The arrestor will have reverse threaded unions
which have to be turned anticlockwise to attach them.

3.5. connecting a hose.
note: New hoses contain a preservative talc which must be blown out with compressed air before use.

3.5.1. Connect a hose coded RED for ACETYLENE to the ashback arrestor as shown below. Tighten nut securely with wrench. The nut
will have a reverse thread which will have to be turned anticlockwise to attach it. If any sign of oil or grease is found, discontinue use
immediately.

3.5.2. Prior to attaching the torch blow out the hose to eliminate any particles or debris. Perform this on the hose in a well ventilated area,
otherwise you may create conditions for re or explosion.

a) Turn the regulator adjusting screw slowly clockwise until the outlet gauge registers 5psi and acetylene begins to pass through

hose.
b) Allow the acetylene to ow for approximately 10 seconds to purge the hose.

High pressure gauge
indicates pressure
in acetylene cylinder

High pressure gauge
ind i c a t e s p r e ssure of
acetylene delivered to
tor c h

Max outlet
pressure1.5 Bar

Max inlet
pressure 2 0 B a r

To increase pressure
turn clockwise
To decrease pressure
turn anticlockwise

Gas in from cylinder
(tting has left hand thread)

4. operation

4.1. Ensure that the regulator is closed by turning the adjusting knob anti-clockwise to relieve the pressure on the diaphragm before
opening the cylinder valve. If this is not done, pressure from the cylinder can damage the diaphragm and render the regulator
inoperative.

4.2. Slowly open the acetylene cylinder valve. As you do so the high pressure gauge (left hand) will register the cylinder pressure.

4.3. Slowly open the regulator by turning the adjusting knob clockwise. As you do so the outlet pressure gauge (right hand) will register
the outlet pressure of gas being fed to the torch. Adjust the pressure according to the size of nozzle in use and the thickness of the
material to be cut or welded. The manufacturer of the torch will normally supply a data chart to refer to.

4.4. Shutting down process. On completion close the cylinder valve.

4.5. Drain gas from the regulator and hose by opening the appropriate acetylene control valve on the torch for a few seconds. Ensure
adequate ventilation when doing this.

4.6. Close the regulator by turning the adjusting knob anti-clockwise.

© Jack Sealey Limited

Original Language Version

sGA4.V2 | Issue 1(L) 15/04/16