Kan anvendes til alle størrelser og typer af to-vejs luftsystemer som f.eks. RHOMAIR, ROBART, CENTURY JET MODELS m.fl. Styrer optræknings- og udfældningshastighed af understel samt understellemme således:
Standard servovandring:0,8 cm. En speciel langsom servo er ikke nødvendig.
Størrelse:50x32x16 mm.
Vægt:68 g.
BEN I OPTRUKKET POSITION
BEN I UDFÆLDET POSITION
UP3 Luftslange udformning
INSTRUCTIONS FOR U.P.3Please read all of the instructions before starting.Your valve has been tested and the speed controls have been pre-set. Please do not change any of the settings until you have tried the valve in your model.InstructionsDue to the number of airlines to be connected, we suggest that the valve be mounted in the wing. Connect the valve spool to your servo using a standard quick link. Adjust the travel of the servo linkage to a total of 0.3 inches and then adjust the length of the link so that the spool travels to each limit of its movement, but without stalling the servo.Connect the airlines from the retract air cylinders to the valve taking great care that the up lines and down lines do not get interchanged. Do not connect the door cylinders yet. With short lengths of tube, connect the two ?door open? air fittings together, and also the two ?door close? air fittings together. By hand, position the struts in the up position and the doors in the open position; disconnect the valve from the servo so you can operate it by hand. Position the valve spool to correspond to the actual position of the retract struts (up), and then connect the valve to the air supply and pressurize the system. If everything is connected correctly nothing should move.Move the valve spool to the down position; the struts should cycle down. Move the valve spool to the up position; the struts should cycle up. If either of the struts move in the wrong direction, reverse the air connections to that cylinder. Adjust the speed of the struts to the desired speed (see ?adjusting the valve?). Having adjusted the struts to cycle at the correct speed (3-10 seconds) disconnect the air supply and also the tubes from the door air fittings. Connect the door cylinders to the valve taking great care to ensure that the open and close lines do not get interchanged. By hand place the struts in the up position and also the doors in the closed position. Position the valve spool in the position and connect the valve to the air supply and pressurize the system. If the door cylinders are connected correctly nothing will move. If one or both of the doors open, then reverse the tube connections of that cylinder. With doors closed and the struts in the up position move the valve spool to the down position; the down sequence should happen (see sequence of operation). Move the spool to the up position; the up sequence should happen. Please note: if the valve has not been operated for some time it will require more force for the first actuation. This is due to the five ?o? rings sticking and is nothing to be concerned about.Adjusting the ValveIf the speed of the struts and doors are to your liking, there is no need to adjust the flow control valves. If however you require to change them, proceed as follows: using the correct size wrenches, slacken the locknut (quarter turn) of the control you wish to change and turn the needle valve clockwise if you wish to reduce the speed or counter clockwise to increase the speed. Do not turn the needle valve more than one tenth of a turn before you lightly snug up the locknut and cycle the system and observe the change in speed. Repeat the adjustments as many times as required until you have the desired speeds. When satisfied with the speeds, tighten the locknuts being careful not break the needle valves. Reconnect the servo and check for correct travel and direction.Safe OperationWhen assembling the aircraft always make sure that the valve spool position corresponds to the actual position of the struts before pressurizing the air tank. Failure to do this will result in the struts snapping into position and possibly causing damage. If the struts hang up during the retract cycle due to either low air pressure or mechanical binding, the doors will shut when the air has been exhausted from the exhaust side of the retract cylinder.This valve was tested and pre-adjusted at our facility and was working correctly when it left us.IF YOU HAVE ANY PROBLEMS PLEASE PHONE AND ASK FOR HELP.Do not disassemble the valve.LubricationThis valve has been lubricated for life. It should not need re-lubricating.The ?o? rings in the valve have been lubricated with silicone grease(Dow Corning #55). If it becomes necessary to re-lubricate, do so only with Dow Corning #55 (if you have problems finding this product, it is a stock item with Ultra Precision).To gain access to the door control mechanism, remove the two screws holding the round cover in place at the end opposite to the quick link connection end. Using a thin piece of music wire, with its end made very smooth so as not to scratch the valve bores, insert it through the hole at the opposite end to the round cover and very carefully push out the cover, followed by the actuating cylinder, spool and spring. Clean with a lint free cloth then lubricate with Dow Corning #55 and re-assemble. Use the music wire to guide the spring into its seat. When inserting the spool it may be necessary to ?jiggle? it to get the spring back into its seat at the end of the spool. To remove the strut spool, remove one of the snap rings and pull out the spool.Air leaksIf air is heard to leak from the valve on a continuous basis, please do not assume that the valve is at fault until you have performed the following test: remove all the airlines except the air in line from the valve. Blank off all the outlets by connecting each pair of outlets together with short lengths of airline tube. Now pressurize the system and cycle the valve. All that should be heard is a short hiss each time the valve is cycled. If this is the case, then the valve is not at fault and the problem is most likely a leaking ?o? ring in one of the retract or door cylinders. If however air continues to leak from the valve, then it is at fault and we suggest that you either return it for repair/replacement, or go through the lubrication procedure. DO NOT return the valve without contacting us first.If you have any problems using this valve, please phone
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