Industrial Grade Pneumatic Combination Valve cuts off air and oil sully to burner when desired temperature achieved and restarts after fall of 10?C to 15?C of temperature. The Pneumatic Combination Valve is designed for automation in furnaces and to reduce manual controls. The Pneumatic Combination Valve can be used in all types of oil-fired furnaces whether it is forging, heat treatment or rolling mill furnace. The Industrial Grade Pneumatic Combination Valve offers good performance.