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- November 25, 2020 at 9:51 am in reply to: High speed ( less then 1 millisec) valves for grain sorting #20934
adminParticipantPlease send me a mail we can help you
November 25, 2020 at 9:52 am in reply to: supply solenoid valves from Chinese manufacture, supply solenoid valves from Chinese manufacture #20935adminParticipantWhat is the name and web address of your company?
November 25, 2020 at 9:52 am in reply to: supply solenoid valves from Chinese manufacture, supply solenoid valves from Chinese manufacture #20936adminParticipanthttp://www.kailing-cn.com Fenghua kailing Pnematic co.ltd
adminParticipantTwo different pressures will not mix in any planned ratio. The higher pressure will likely stop the lower pressure feed and could even back flow that feed if that is possible. You need some sort of flow control devices and flow meters to set up the desired flow ratio., Two different pressures will not mix in any planned ratio. The higher pressure will likely stop the lower pressure feed and could even back flow that feed if that is possible. You need some sort of flow control devices and flow meters to set up the desired flow ratio.
adminParticipantCan you add a Cyl-Check to the app? This would add the hydraulic control necessary to smooth the extend and retract motions.
adminParticipantNo ol is alowed in the environment this unit is operating in.
adminParticipantTry using a 5/3 ports open to exhaust valve with an external pilot supply for the solenoid and use a regulator on both exhaust ports to regulate the pressure to both sides of the piston. Also add flow conrtols to the cylinder. With a bit of tweaking that should do it.
adminParticipantI only have a single pilot opearted 5-way at present and need to keep it that way if possible since the control circuit is air also and alredy installed. Would the dual pressure inlets work with a 2 position spring return valve?
adminParticipantI don’t think so as the circuit works by maintaining a pressure on both sides of the piston at the same time.
adminParticipantHave you tried regulating down the pressure holding the table down before energizing your cylinder up? This would reduce the amount of air that has to be exhausted before lifting occurs. This could reduce the 5 second lifting delay. It probably won’t have much effect though if your circuit is causing the restriction. Once the cylinder is up it probably has a lot of air to be exhausted. The inrushing air is giving you your initial motion down at which point the exhausting air is being choked due to the circuit restriction. Have you thought about adding a quick exhaust valve on the cylinder to allow the exhausting air to bypass your circuit? Have you tried reducing this pressure? Have you checked into replumbing your valve for double flow and letting gravity do the work on the return? If redesigning your circuit is an option than this article might help. http://www.machinedesign.com/ASP/viewSelectedArticle.asp?strArticleId=56483&strSite=MDSite&catId=0
adminParticipantThe rduced rod end pressure took care of the problem nicely after a litle tweaking22gg. The cylinder operates quickly and smoothly now. THANKS:
adminParticipantYou need to resize your valve and tubing, as this is causing your delayed reaction times.
adminParticipantThe pros are high speed and long life, the cons are sticking after sitting idle and increased air loss.
adminParticipantMetal sealed solution valve are ideal for quick response times and 24/7 usage, also there life expectancy is greatly increased, although dissadvantages are you need very clean air and a regulated temp range for optimum use. Even by leaving the valves over a weekend without use could enable the valves to “stick”, my opinion now would be to use a standard sealed valve, unless your requirements are for high speed and high usage.
adminParticipantTry searching for a product called Polar Lube. It was available from Alex Milne a number of years ago.
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