Meade CV-4 8 x 30 User Manual

Cv=QSGP*∆Handbook•Useful Equations•Application Examples•Pneumatic Circuits•Conversion TablesSetting anew standard for:Pneumatic Application&Refere

-10-SCFM DefinedQ: What does SCFM mean?A: SCFM means StandardCubic Feet per Minute. “Standard” is air at sea level and at 70° F.Shuttle ValvesQ: Is th

-11-Section I: ValvesFive-Ported ValvesQ: What arethe advantages of afive-ported four-way valve over afour-ported four-way valve?A: Five-ported valves

-12-Air -vs-Solenoid ActuationQ: What arethe advantages of air actuation over solenoid actuation?A: Solenoid actuation requires the presence of electr

-13-Section I: ValvesLow Force To ActuateQ: Aretherevalves available that requireanunusually low force to actuate?A: Low-stress valves need only 6-8 o

-14-Pulse TypeQ: When Iamusing adouble air piloted directional valve, how do Iget the valve to shift when one ofthe pilots is already being charged?A:

-15-Section II: CylindersRound LineNon-repairable cylinders have areputation as hard-working, long-lasting, economical performers. Theyareavailable in

-16-Rodless SlideBimba's rodless slides aremagnetically coupled,and featurebuilt in guides for self-guided motionwith approximately 50% space sav

-17-Size SelectionQ: How do Idetermine the correct cylinder boresize for my application?A: Follow these four easy steps.Angle A10°0.1720°0.3430°0.5040

-18-Cylinder mountingPivot mounting options include the pivot, clevis,and trunnion.They areeffective in eliminating side loads in asingle plane. Insta

-19-Section II: CylindersAmbient ConditionsThe following environmental conditions will requirespecial cylinders or special materials.z Operating tempe

-2-Bimba Manufacturing Company is pleased to provide this Pneumatic Application andReference Handbook. It contains helpful information regarding fluid

-20-Section II: CylindersPneumatic Cylinder ForceCylinder forces areshown in pounds for both extension and retraction. Lines in standardtype showexten

-21-Section II: CylindersAir Cylinder SpeedEstimating cylinder speed is extremely difficult because of the flow losses within the system in piping, fi

-22-Section II: Cylinders=0.436 cu. ft./min.=6.44 (times air is compressed when at 80 psi)Air Consumption RatesQ: How do Icalculate the air consumptio

-23-Determine Air Volume RequiredThe figures in the table below arefor cylinders with standardrods. The difference with over-sized rods is negligible.

-24-Section II: CylindersDouble-Acting -vs-Single-ActingQ: What arethe differences between double-acting and single-acting cylinders?A: Double-acting

-25-Smoother Cylinder MotionQ: What could cause acylinder to move erratically duringstroking?A: Irregular rodmotion could be caused by:1. Toolow an in

-26-Section II: CylindersWhen positioning is infinite or variable depending on aprocess, or when the absolute position of acylinder needs to be measur

-27-NOTE: The Valve shown hereisfromthe Mead NovaSeries. The 3-Way Limit Valves arefromthe MVseries.Increasing PowerQ: How do Iget morepower out of ap

-28-Section II: CylindersAdjustable StrokeQ: Is it possible to make the stroke of acylinder adjustable?A: Yes. Double-acting cylinders may be ordered

-29-Section II: CylindersHigh TemperatureOperationsQ: Ihave an application in ahigh temperatureenvironment. What should Idotoavoid com-plications?A: T

-3-Table of ContentsSection I5-14 Valves5-6 Understanding Circuit Symbols7CVDefined8Pneumatic Valve Sizing9Valve Selection10-14 Frequently Asked Quest

-30-Closed Loop Position Control and FeedbackPosition Feedback CylindersThe PFC defines the position of amachine fixtureortool relative to apart moving

-31-Switch TechnologyMagnetic reed switches: Magnetic reed switches have internal contacts that close in the presence ofamagnetic field.Reed switches a

-32-Switch Hysteresis and the Operating WindowThe window is the distance of travel over which the switch is on. Itcan be smaller or larger depending o

-33-Section IV:CircuitsBasic Control CircuitsAir CircuitryQ: What is atypical air circuit?A: The simplest and most common air circuit consists of adou

-34-Section IV:CircuitsAdvanced Control CircuitsUsing TwoValves for Three-Position FunctionUse these set-ups to obtain aThree-Position Function with (

-35-Section IV:CircuitsTwo-Hand Extend One-Hand RetractFor applications whereasecondary operation must occur,utilize this circuit. This circuit allows

-36-Section IV:CircuitsItemMead PartNo.DescriptionACSV-101 Two-hand anti-tiedown control unitCSV-101 LS Same as above, but with low stress buttonsCSV-

-37-Section IV:CircuitsTwo-Hand Extend with Automatic ReturnThis circuit is useful for applications wherecycle time and safety is an issue. With the A

-38-Section V: Air Preparation EquipmentAir Filtration, Regulation, and LubricationCompressed air must be clean, lubricated properly,freefrommoisture,

-39-Section VI: ChartsPneumatic Pipe SizeThe pipe sizes listed in the chart below areassuming a100 psi pneumatic system to carry air at a1psi loss per

-4-Section VI 39-42 Charts39 Pneumatic Pipe Size39 Pneumatic PressureLoss40 Air Flow Loss Through Pipes41 PressureLoss Through Pipes41 Friction of Air

-40-Section VI: ChartsAir Flow Loss Through PipesInstructions: Find the factor from the chart below according to the pipe size and SCFM. Divide thefac

-41-Section VI: ChartsPipe SizeNPTGateValveLongRadiusElbow*MediumRadiusElbow**StandardElbow***AngleValveCloseReturnBendTeeThruSlideGlobeValve1/2"

-42-Section VI: ChartsVacuum Flow Through OrificesThe chart below approximates flow that would be expected through apractical orifice. Flows are2/3 of

-43-Section VII: ConversionsDecimal Equivalents(of Fraction, WireGauge and Metric Sizes)SizesDecimalInchesSizesDecimalInchesSizesDecimalInchesSizesDec

-44-Section VII: ConversionsDecimal Equivalents(of Fraction, WireGauge and Metric Sizes)SizesDecimalInchesSizesDecimalInchesSizesDecimalInchesSizesDec

-45-Section VII: ConversionsQuantity US Unit SI Unit Conversion FactorLength inch (in.) millimeter (mm) 1in. =25.4mmPressure* pounds/sq. in. bar 1bar

-46-Section VII: ConversionsCubic Meter Cu. Decimeter Cu. Centimeter US Gallon Cu. Inch Cubic Foot11x1031x1062.642 x1026.102 x10435.3141x10-311x1032.6

©Copyright 2011 Bimba Manufacturing Company.RH-112 Effective January,2012. All Rights Reserved.Your stocking distributor is:Worldwide distribution mea

-5-Section I: ValvesUnderstanding Circuit SymbolsDirectional air control valves arethe building blocks of pneumatic control. Symbols representingthese

-6-Section I: ValvesSimple Pneumatic ValvesCheck ValveLever Operated, Spring ReturnPiloted Solenoid andManual OverrideSolenoid Operated, Spring Return

-7-Section I: ValvesCvDefinedQ: What does “CV”mean?A: Literally CVmeans coefficient of velocity.CVis generally used to com-pareflows of valves. The hi

-8-Section I: ValvesInletPressure(psi)CfCompressionFactor"A" Constants for Various Pres-sureDrops2psi∆P5psi∆P10 psi∆P10 1.6 0.10220 2.3 0.12

-9-Section I: ValvesValve SelectionQ: How do Iselect the right valve to control acylinder?A: Thereare many factors that contribute to theperformance o