![]() The product specification of a digital timer for ball valves is shown in Figure 5.Ī: ‘Mode’ button to set the mode of operation. The timer is compatible with a DIN-A connector, and it can be programmed to operate in three different operating modes which are discussed in the next section. An example of a common digital timer, is the robust AF-TD timer that can be programmed to set an ON and OFF perios anywhere between 0 and 100 hours. Tighten the screw (with torque less than 0.5 Nm) until the rubber seals properly.įigure 4: Waveform showing the ball valve’s ON and OFF periods Digital timerĪs the name suggests, a digital timer displays the ball valve’s ON and OFF periods using numbers. Position the rubber seals correctly to protect the construction against moisture. Ensure that all parts are clean and free from moisture. Install the timer between the ball valve and the connector. Read our article on electric ball valve installation for the details process of connecting ball valve terminals to the power supply. Analog timer installation Electrical connection For example, rotating and setting the knob to 30 minutes will disconnect any electric signal sent to the ball valve, stopping its operation.Į: LED lights up in the OFF position. The valve remains on during this interval.ĭ: Set the OFF time in minutes. For example, rotating and setting the knob to 4 will send a pulse signal for 4 seconds into the ball valve. The last used program is stored in the memory and is active (in the initial state) when the power supply is reconnected, or the TEST button is pressed.Ĭ: Set the ON time in seconds. Product descriptionī: Press the TEST button to restart the loaded program. The timer is compatible with the EN 175301-803 connector (formerly DIN 43650A). The program can be stopped by interrupting the power supply. The switch has a repeating on-off program with an adjustable pulse (on) of 0 to 10 seconds and an interval time (off) of 0 to 45 minutes. ![]() Analog timerĪn exmaple and one of the most common analog timers for electric ball valves is the robust SMD-720. The main advantage of this operation is that no human intervention is required to turn the valve on or off after a certain interval hence, these systems can be installed in remote locations where human intervention may be difficult but the application requires an on/off function. ![]() For example, the timer can be programmed to open a ball valve for 20 minutes and keep it off afterward simply by setting the interval time (20 minutes in this case) on the timer panel. The time periods during which the valve remains on and off can be programmed within the timer yielding an effortless operation. Connecting a timer helps automate the valve's opening and closing interval for electrically actuated ball valves. A ball valve can be operated manually through a lever or actuated electrically or pneumatically. View our online selection of ball valves and timers!Ī ball valve is a shut-off valve that controls the flow of a liquid or gas using a rotary ball having a bore.
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