Siemens Air/Gas Ratio Controlling Gas Valve Actuator w/o Switch (120V)

SKP55? pressure regulating electro-hydraulic actuators are used in combination with VG? series gas valves to provide slow opening, fast closing safety shut-off and air/gas ratio control for industrial and commercial burner applications. The SKP55 actuator controls the pressure difference across a restriction in the gas supply line as a function of the pressure difference across a restriction in the air supply duct so that the air to gas ratio remains constant irrespective of air volume changes. There is no need for an upstream constant pressure regulator when using an SKP55 actuator within the applicable pressure range of the VG valve body. Since a single valve performs three functions: safety shut-off, constant pressure regulation, and air/gas ratio control, fewer components and fittings are required to assemble a gas train. This significantly reduces both the size and the weight of the gas train. The total pressure drop across the gas train arrangement is reduced, allowing for the use of smaller diameter...