The Siemens compact VOG opens slowly when power is applied. It closes in less than a second when power is interrupted. In summary, it has a visible position indication on the front of the actuator displays position, and a light indicates when the actuator is powered.
The Siemens VOG15 is an electro-hydraulically actuated three-way oil valve design to provide safety shut-off control for industrial and commercial burner applications. The normally closed port on the valve is rated for safety shut-off function and the normally open port located on the bottom of the valve is typically used for recirculation of heavier oils. A 3/4-inch NPT pipe plug (provided) must be used in the bottom port for two-way applications. The compact VOG15 actuator opens slowly when power is applied and closes in less than a second when power is interrupted. A visible position indicator on the front of the actuator displays position, and a light indicates when the actuator is powered.
The electro-hydraulic actuator consists of a cylinder filled with oil, a piston containing an electric oscillating pump, and a relief system. When power is supplied to the actuator, the relief system closes, and the pump moves the piston downward in the cylinder, opening the oil valve. When power to the actuator is interrupted, the relief system opens and the oil valve closes in less than one second. A position indicator, visible through the transparent portion of the terminal cover, shows the entire stroke range of the actuator. The oil valve only uses about 1/4-inch of the actuator’s stroke. A light, which is visible through the lower left transparent portion of the terminal cover, indicates when the actuator receives power. A non-adjustable SPDT POC over travel switch signals the valve closed position after the oil valve has closed. If equipped, an SPDT auxiliary switch changes state when the oil valve is more than 80% open.
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SIEMENS VOG OIL SAFETY SHUTOFF VALVES:
US/Canada (UL Listed, FM Approved and CSA Certified)
VOG15.011U1 – ¾” NPT, with Proof of Closure (POF) Switch
VOG15.012U1 – ¾” NPT, with POF and Auxiliary Switches