Many automated pool systems have valves with actuators. DO NOT attempt to change the position of the valves by hand. There is usually a little switch on the back of the actuator that will change the position of the valve. Just make sure that you leave it in the right position when you leave the pool, or you may end up draining the spa.
The valve actuator sets on top of the Jandy valve. There are four long screws that go through the actuator and into the screw holes on the Jandy valve. The handle on the Jandy valve actually goes on top of the actuator, once the actuator in installed.
DO NOT ATTEMPT TO TURN THE VALVE HANDLE ON TOP OF THE ACTUATOR. THERE ARE GEARS INSIDE THE ACTUATOR THAT CAN BE EASILY STRIPPED OUT AND WILL REQUIRE A NEW ACTUATOR AT A COST OF APPROXIMATELY $250.00.
| To change the position of the valve, use the small toggle switch that is on the back of the valve. There are two on positions and one
off position. ON 1 is the opposite position as ON 2. If you switch this valve, be certain to switch it back to the original position. If the valve
actuator is left in the OFF position, then the control system will not be able to move the valve.
There are cams inside the valve actuator that set the positions of the valve in ON 1 and ON 2. To access these cam settings, remove the four small screws in the top cap of the actuator. Remove the cover and observe how the cams work. If you are unsure of what you are doing, consult with a pool professional.
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Partial sterling combustion engine design2008-08-28 18:29:38 by wuzawuzzal
The main idea is to have the cylinders charge and detonate fuel in an computer controlled automated way as to reduce the amount of combustion cycles that would other wise be necessary to keep the engine running.
The piston is directly connected to a pneumatic actuator that extends and retracts to either draw in fresh fuel or expel exhaust gases. A charge is loaded and valves are operated pneumatically to open a path to the drive train or to exhaust spent fuel. A pressure relief valve is installed to prevent over pressure and also to direct excess cylinder pressure to a pressure tank (not shown) to be used to power actuators
Wide Range of Metso's Neles® Flow Control Products Receive SIL Certifications — ThomasNet News
Metso control and automated on-off valves provide complete solutions from a single source supplier and are tested as an assembly to assure compatibility of crucial safety loop components.
Intermatic P4243ME 2-Circuit and Valve Actuator Controller for Pool/Spa Combinations
Lawn & Patio (Intermatic)
Jandy JVA 2440 Pool Valve Actuator 180 Degree - 4424