KM/ (Stainless steel end plates) > > Ø... / inch (... mm) > > Very easy to install no alignment problems > > Almost frictionless operation > > No maintenance or lubrication > > Typical applications; actuator, air spring, or vibration isolation > > High isolation level for vibration applications Technical features Medium: Compressed air lubricated or unlubricated, Nitrogen, water (with glycol) Operation: Single acting Operating pressure:, bar (79 psi) recommended dynamic pressure ( psi) Nominal diameters:,,, / inches Strokes: From 7... mm, depending on diameters and number of convolutions Operating temperature: for KM/ (Standard) -... + C (-... + F) -... +7 C* (-... + F)* IR for TKM/ -... +7 C (-... F) -... +9 C* (-... 9 F)* ECO for EKM/ +... + C (+... 9 F) -... + C* (-... + F)* * The number represent the maximum permissible operating temperature. It is suitabel to operated with restriction at this temperature, the air bellow may have a reduced life time! Materials: End plates, Studs and central ring: Stainless steel (.) Bellow: KM/: NR/BR, SBR compound rubber TKM/: IR EKM/: ECO Technical data Model KM/ KM/ KM/ KM/ KM/ KM/ Cylinder Ø (inch) " " " " " " Port size G/ G/ G/ G/ G/ G/ Nominal Ø (inch) x convolutions " x " x " x " x " x " x 7 7 height min 7 7 Recommended max working height height max Retracting force to reach min height (N) Force at (N) depending from the stroke See graph on page & Model KM/ KM/ KM/ KM/ KM/ Cylinder Ø (inch) " " /" /" /" Port size G/ G/ G/ G/ G/ Nominal Ø (inch) x convolutions " x x /" x /" x /" x height min 7 7 Recomended max working height 9 height max Retracting force to reach min height (N) Force at (N) depending from the stroke See graph on page & without notice, the specifications given in this document. (999-7d) Norgren GmbH / en..7.
KM/ (Stainless steel end plates) Alternative air bellows Symbol Model Material Description Dimension see page KM/ Standard Ø... / inches (... mm) TKM/ Butyl Ø... / inches (... mm) EKM/ Epichlore Ø... / inches (... mm) Options selector KM/ Air bellow materials NR/BR, SBR compound rubber High temperature (Butyl) Extreme temperature (Epichlore) Substitute None T E Number of convolutions Substitute Nominal diameters (inches) Substitute / Note: Please fill in only the numbers of digits required, e.g. KM/ Important instructions: Thrust: The thrust depends on the height of the bellow. When height increases - the thrust decreases. - Before installing the air bellow, check it carefully for any damage it may have suffered from transport or improper storage. - Do not inflate the air bellow until it has been secured properly. Clearance: There must be enough clearance around the air bellow. - The full surface of the metal parts is to be used to bear the forces. - Air bellows must be equipped with lateral guides. - Deflate the air bellows fully before removing. - Ensure that the bellows is not constantly in contact with hydraulic oil, lubricants, solvents, metal cuttings and welding sparks. - Should the air bellow be subjected to special media in an application, ask Norgren for further information, specifying the medium, temperature and concentration Stops: To avoid damage when the bellow is compressed or extended mechanical stops at both end positions have to be used. en..7. without notice, the specifications given in this document. (999-7d) Norgren GmbH /
KM/ (Stainless steel end plates) Basic dimensions KM/... KM/ A Dimensions in mm Projection/First angle, M A ø N B C F D E G / diameter min. height min. height Stroke Recommended working hight Table Nominal Ø (inch) x convolutions Stroke height [A] min. Recommended working height [B] height [C] Max. torque for mounting studs (Nm) Natural frequency [fn] at bar (Hz) Siffness at bar (N/mm) Recomended vibration height [mm] Ø E Ø D Ø F Ø N Weight (kg) Models x 7,7,, KM/ x 7 7,,,7 KM/ x, 7 7, KM/ x 7, 7,7 KM/ x - - - 7, KM/ x, 7, KM/ x 7,, KM/ x - - -,9 KM/ /" x,, 7, KM/ /" x 7 9,,, KM/ /" x - - -, 9, KM/ Operation angle Out of alignment α C A height min height max Z Table Operation angle Nominal Ø (inch) x convolutions Operating angel [α] ( ) Out of algignment [Z] height [A] min. height [C] Models Tilt angles from... are possible, depending on the air bellow design. Ensure application is within minimum and maximum installation heights. " x KM/ " x 7 KM/ " x... KM/ " x... 7 KM/ " x... KM/ " x... KM/ " x... 7 KM/ " x... KM/ /" x... KM/ /" x... 7 KM/ /" x... KM/ / without notice, the specifications given in this document. (999-7d) Norgren GmbH en..7.
KM/ (Stainless steel end plates) Thrust (at,,, ), volume (at ) KM/ KM/ KM/ KM/, 7, 7, bar bar,, bar bar 7 7 KM/ KM/ KM/ KM/ bar bar bar bar 7 Caution! Ensure that all applications are within the installation height. For applications in the grey area please contact Norgren technical service. en..7. without notice, the specifications given in this document. (999-7d) Norgren GmbH /
KM/ (Stainless steel end plates) Thrust (at,,, ), volume (at ) KM/ KM/ KM/ 7 7,, 7, 7, bar bar,, 7, bar, 7 9 7, 9 7 Caution! Ensure that all applications are within the installation height. For applications in the grey area please contact Norgren technical service. / without notice, the specifications given in this document. (999-7d) Norgren GmbH en..7.
KM/ (Stainless steel end plates) Application example - Air bellow as an actuator A kg conveyor carrying a kg pallet needs to be lifted by 9 mm (stroke) in order to transfer the pallet to another level. Four () air bellows should be used. The available operating pressure is bar. The operating temperature is C. There is a 7 mm square space to house each air bellow. Compression and extension stops are provided. The air bellows have to be mounted in a space which is mm apart. During the lifting operation the conveyor may tilt in the second half of the stroke by a of 9. Step : Check the thrust at bar at a height of 7 mm. From the charts in the datasheet page we can see that: KM/ Step : Fill in and complete the datasheet a) Total weight to be lifted: F = ( kg + kg) m/s = N b) Number of air bellows: n = c) Thrust per air bellow: f = N = 7 N d) Operating pressure: P = bar e) Required stroke: S = 9 mm f) Vertical space: Xv = mm g) Horzontal space: Xh = 7 mm h) Operating temperature: T = C i) Operation angle: a = 9 j) Out of alignment: A = mm k) Chemical resistance: normal environment bar Step : From table air bellows have to be selected, that have a min. 9 mm stroke and clearance around the air bellows smaller than Xh = 7 mm. We select: KM/ Step : Calculate the total height at which the air bellow should be used, see step : Vertical space Xv mm Stroke S 9 mm Total height 7 mm By refering to the total height of 7 mm and the vertical space of mm, only KM/ (installation height min. 7 to recommended working height mm) can be used from table. 7 7 Stroke KM/ will provide N at. To get the figure for bar, we have to calculate: N = 7 N at bar The air bellow KM/ can provide the required thrust of 7 N. Step : Check the operation angel and the out of alignment when the selected air bellow can tilt, see table. i) operation angle is higher as existing operating angel 9. j) out of alignment is mm is higher as existing alignment mm. KM/ can be used. Step : Check all remaining parameters h) At C Standard rubber material -... + C k) No special chemical resistance is required KM/ is the chosen air bellow, because it meets all requirements. en..7. without notice, the specifications given in this document. (999-7d) Norgren GmbH /
KM/ (Stainless steel end plates) Application example - Air bellow as a vibration isolator A hydraulic power unit with an excitation frequency (fe) between and cycles/min. (= to Hz) must be vibration isolated. The total weight of the power unit is kg. The supporting area under the unit is, m x, m. The operating temperature is C. The space for the installation is mm high. Four air bellows will be used. The operating pressure is bar. A minimum of 97% vibration isolation has to be reached. Step : Fill in and complete the datasheet a) Total weight to be isolated: F = kg m/s = N b) Number of air bellows: n = c) Thrust per air bellow: f = N = 9 N d) Operating pressure: P = bar f) Vertical space: Xv = mm g) Horizontal space: Xh = mm (, m ) h) Operating temperature: T = C k) Chemical resistance: normal environment m) Minimum isolation rate: I = 97% p) Excitation frequency fe = min. Hz, Hz Two types of air bellows are chosen. Each one has to work with a vibration height lower than mm and fit in a horizontal space samler than mm. From table we select:. KM/ - Vibration height = mm - Clearance around the air bellow = mm - Airspring natural frequency fn at bar =, Hz - Stiffness at bar = N/mm. KM/ - Vibration height = mm - Clearance around the air bellow = mm- Airspring natural frequency fn at bar =, Hz - Stiffness at bar N/mm Step : Take the air bellow with the lowest airspring natural frequency fn =, Hz. Do to the fact that both air bellows constater the same natural frequency. Please use the lowest stiffness at N/mm in order to get the highest isolation rate refering to fe min. = Hz. Air bellow KM/ is chosen. Step : Calculate the isolation rate (I) of the KM/ by using the formula: Step : Check the thrust at bar at a height of mm. From the charts in the datasheet page we can see that. KM/ bar 7 Stroke KM/ will provide N as a vibration height of mm at bar. Step : Check all remaining parameters h) At C Standard rubber material (-... + C) can be used. g) No special chemical resistance is required. x KM/ air bellows are chosen. They will provide 99,% vibration isolation and lift the kg weight at bar. 7 Formula: I = - fe ( - fn) Example: I = - ( -, ) = -, =,99 I = 99,% (fn) (fe) fe = Excitation frequency of load fn = Airspring natural frequency (fn) Warning These products are intended for use in industrial compressed air systems only. Do not use these products where pressures and temperatures can exceed those listed under»technical features/data«. Before using these products with fluids other than those specified, for non-industrial applications, life-support systems or other applications not within published specifications, consult IMI Precision Engineering, Norgren GmbH. Through misuse, age, or malfunction, components used in fluid power systems can fail in various modes. The system designer is warned to consider the failure modes of all component parts used in fluid power systems and to provide adequate safeguards to prevent personal injury or damage to equipment in the event of such failure. System designers must provide a warning to end users in the system instructional manual if protection against a failure mode cannot be adequately provided. System designers and end users are cautioned to review specific warnings found in instruction sheets packed and shipped with these products. / without notice, the specifications given in this document. (999-7d) Norgren GmbH en..7.7