The Jumbo regulator is designed to be used on cylinders supplying Butane gas appliances requiring an inlet pressure of between 0.5 and 7.5 bar, and requiring operating outlet pressures of between 28 and 30 mbar. It is fitted to any cylinder fitted with a 35mm diameter automatic valve. The cylinder must always be kept in an upright position and, if used externally, must be kept under cover. No attempt should be made to adjust the pre-set outlet pressure of the regulator. The regulator is fitted with an excess flow valve which will shut off or restrict the flow of gas should the flow rate be more than 110% of the maximum flow rate.