Filling Head Pneumatically operated, suitable for Self closing valves with air connection turns the gun on & off and requires compressed air at 5-7 bar pressure. Even if air is supplied to the gun it will not open unless there is a valve at the mouth. This is a safety measure in the design. Flow starts only when valve is fully clamped on the cylinder valve. Available for different valve sizes as per the customer requirements. Used for evacuation, weight correction & Purging of cylinders.