All of the SKP Series electro-hydraulic actuators can be used in combination with any VG Series gas valve. This modular approach creates a matrix of valve combinations, allowing manufacturers to meet varied capacity and pressure regulation requirements with minimal inventory. SKP Actuators fit all valve sizes from ½" to 6". SKP actuators are multifunctional, they perform three functions: safety shutoff, gas-pressure regulation and air/gas ratio control. They eliminate the need for mechanical cams and linkages while improving burner performance.