User Manual for Vevor Welding Gas Accessories 1C020-0064-CGA200

Quick guide from the manual

This document provides essential instructions for the safe operation and maintenance of the Vevor cylinder pressure regulator. It is intended for use with compressed gases, pressurized dissolved gases, and liquid gases. Always keep these instructions accessible in the workshop.

Safety instructions

• Oil and grease hazard: Keep hands and tools clean. Oil and grease can cause an explosion on contact with oxygen.
• Unauthorized modifications: Do not modify or tamper with the regulator. Repairs must only be performed by competent personnel at an authorized service workshop.
• Leakage: If the regulator is not functioning correctly or shows signs of leakage, close the cylinder valve immediately and remove the device from service.
• Intermediary connections: Connections between the cylinder valve and the regulator are strictly forbidden.
• Usage restrictions: Do not use for corrosive gases (e.g., ethylamine, dimethylamine, ammonia) or gases in a liquid state.

Operation

Connecting the regulator

1. Before connecting, open and close the cylinder valve quickly to dislodge water or foreign objects from the inlet seating. Do not stand in front of the valve.
2. Check that the gasket (if used) is undamaged.
3. Connect the regulator to the cylinder valve.
4. Connect the hose to the regulator outlet. Use hoses compliant with EN 559 and connections compliant with EN 560, secured with appropriate hose clamps.

Setting the pressure

Before releasing gas into the system, ensure the following:

• The regulator is correct for the gas being used.
• All gauge pointers are at zero.
• The regulator is unpressurized (pressure adjusting wheel fully unscrewed/anti-clockwise).
• Downstream valves are closed.

To operate: Open the cylinder valve slowly, check the cylinder pressure on the contents gauge, open the downstream valve (blowpipe or welding gun), and set the working pressure by rotating the adjusting wheel clockwise until the required pressure/flow is reached.

Closing down

1. Close the cylinder valve.
2. Unwind the pressure adjusting wheel.
3. Vent the pressure in the system (blowpipe or welding gun).
4. Once the system is purged, close the downstream valves.

Maintenance and repairs

Protect the regulator from damage and perform regular visual inspections. Ensure all gaskets, O-rings, and mating surfaces are in satisfactory condition. The inbuilt safety valve is preset and must not be changed.

Cylinder pressure regulators with flow meter gauges

Regulators with flow gauges have an integrated throttle. If the downstream equipment also has a flow meter, remove it, as it will not be calibrated with this regulator.