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Reliability characteristics MTTFDregarding the functional safetyaccording to EN ISO 13849RE 08012Edition: 2017-01Replaces: 2014-08MTTFD valuesContentsContentsDetermination MTTFD values according toEN ISO 13849-1:2015Compliance with safety principles, application notesDirectional on/off valvesProportional directional valves2-way cartridge valvesIsolator valvesPressure valvesFlow control valvesPressure switches and sensorsInductive position switchesExplanation of the footnotes123456, 78899910RE 08012, edition: 2017-01, Bosch Rexroth AG

2/10MTTFD values Reliability characteristicsDetermination MTTFD values according to EN ISO 13849-1:2015Using reliability characteristics MTTFD (mean time todangerous failure) of components, the probability of adangerous failure per hour PFHd of a machine or system iscalculated and kept low, to a justifiable degree.For hydraulic components, the standardEN ISO 13849-1:2015 specifies an MTTFD value of at least150 years if the "basic" and "well-tried" safety principlesare complied with. The following is, for example,demanded for hydraulic valves used in safety-related partsof control systems: Automatic reaching of the basic position in case ofenergy failure Safe keeping of the basic position Sufficient overlap with spool valves in basic positionBosch Rexroth AG, RE 08012, edition: 2017-01Hydraulic components not satisfying the relevant safetyprinciples are not suitable to be used in safety-relatedparts of control systems.Rexroth has carefully tested their products with regard toall relevant "basic" and "well-tried" safety principlesaccording to a method acknowledged by IFA (Institute forOccupational Safety and Health of the German SocialAccident Insurance).

Reliability characteristics MTTFD values 3/10Compliance with safety principles, application notesThe products listed in the following are suitable to be usedin safety-related parts of a control system according toEN ISO 13849-1:2015.According to EN ISO 13849-2:2012, the products satisfythe basic safety principles well-tried safety principles.For evaluating and interpreting the control system'sreliability, use the following characteristics for theproducts:MTTFD see table page 4 9TM 20 years (maximum period of use according toEN ISO 13849-1:2016)In this use, please ensure compliance with thesubsequently specified application notes!Application notes:The following basic safety principles according toEN ISO 13849-2:2012 for the implementation and theoperation of the products are to be complied with. For operation and handling of the products, complywith the information in the data sheet and theoperating instructions. Only use the hydraulic fluids specified in the datasheets and comply with the oil cleanliness class for thewhole period of use. If switching spool valves are not actuated for a longerperiod of time, the spool may get stuck. We thereforerecommend switching the valve regularly, at reasonabletime intervals. If you use the product for safety-related structures withhigher categories (2 to 5) according toEN ISO 13849-1:2015 section 6, consider therequirements (e.g. CCF, DC, PLr, software, systematicerrors) specified there. According to EN ISO 13849-1:2015, the maximummission time - complying with the oil cleanlinessaccording to ISO 4406:1999 - is TM 20 years. In termsof preventative maintenance, it is recommendedreplacing the components already before expiry of themaximum period of use. Industrial valves are usually designed for 10 millionswitching cycles. If the maximum number of switchingcycles is exceeded within the period of use, accordinglyshorter exchange intervals are to be determined.Conversion of MTTFD into B10D according toEN ISO 13849-1:2015:MTTFD B10D0.1 x nopB10D Mean number of cycles in which up to 10% of thecomponents have failed in a dangerous manner.nop Mean number of annual actuations.Notice:According to EN ISO 13849-1:2015, higher MTTFDvalues can be assumed with a limited number ofoperations per year:nopMTTFD 1,000,000150 years 500,000 1,000,000300 years 250,000 500,000600 years 250,0001200 yearsUse of valves and components with spool positionmonitoring: The signal of the position switch must not be used fordirect activation of a safety-related control function.Use of valves with integrated electronics for safetyrelated control systems: In case a safety function of a system is required, thevoltage supply of the valve electronics is to be switchedoff by a suitable switching element with appropriatereliability. In the table (page 5 and 8), thesevalves are marked with the comment "Switch off OBEvoltage supply". If persons have to enter the danger zone with activatedvalve electronics, additional measures for guaranteeingtheir safety have to be taken for the reasons specifiedabove.Use of valves with flame-resistant hydraulic fluids HFC: The period of use TM must be reduced for applicationswith functional safety.Life cycle ascompared tooperation withmineral oil HL, HLPMaximum periodof use TMaccording toEN ISO 13849-1Directional on/offvalves, proportionaldirectional valves30 100 %10 years2-way cartridgevalves, isolatorvalves, pressurevalves50 100 %6.7 yearsRE 08012, edition: 2017-01, Bosch Rexroth AG

4/10MTTFD values Reliability characteristicsDirectional on/off valvesTypeNGDatasheetMTTFD valuein years 1)B10 valuein 0DAdmissiblespool designs 3);Maximumlongitudinal spoolacceleration40A, C, D, B, Y, E, F, G, J, L, M, P,Q, R, T, U, W, A9, B9, E67, U10,Y11, J2, X7, X34, X139, L42; 15 g/11 ms 4)2).WE 6 .6X/.EG 623178–20optionalQM,QR.WE . .73-6X/ A12 A73, D73, B73, Y73, E73, G73,J73, R73, W73; 10 g/11 ms 4).WE 6 .6X/.EG SO407623178-00–2040optionalQMC, D, D46, Y, E, J, J2, Q, R; 15 g/11 ms 4).WE 6 .7X/.H 623164150 1200–––A, C, D, B, Y, E, G, H, J; 15 g/11 ms 4).WE 10 .3X/.C ;.WE 10 .4X/.C 1023327150 1200––optionalQMA, C, D, B, Y, E, F, G, J, L, M, P,Q, R, T, U, W, U10; 15 g/11 ms 4).WE 10 .-5X/.E 1023340–2040–A, C, D, B, Y, E, F, G, J, L, M, P,Q, R, T, U, W, U10; 15 g/11 ms 4)5-.WE 10 .3X/.C 1023351150 1200––optionalQMA, C, D, B, Y, E, F, G, J, L, M, P,Q, R, T, U, W, J2, X84, E67; 15 g/11 ms 4)5-.WE 10 .5X/.E 1023352–2040optionalQMA, C, D, B, Y, E, F, G, J, L, P, R,U, W; 15 g/11 ms 4)4WE 10 .5X/H 1023343150––optionalQYC, D, Y, Y11, E, J, L, M, U; 15 g/11 ms 4)Exceptions/limitationsImpulse spooldesign "O" andvalves for ACvoltage "W" 5)Impulse spooldesign "O" andvalves for ACvoltage "W" 5)Z4WE 6 .-3X/E 623193150 1200––optionalQMD24, D27, E51, E53, E56, E63,E68, E127, E129, E130, E131,E132, E134, E135, E136, E137,E141, E144, E145, E146, E166,X188, X250, X252, X253, X254,X255, X256; 15 g/11 ms 4).SEC 6 .1X/.C 622035150 1200–––E69A, E35, E100, E13, E22, EA,EB, E, E61, E40, E89, E18M-.SED 6 .-1X 622049150 1200––optionalQMA, QMBPK, NK, UK, CKM-.SED 10 .1X 1022045150 1200––optionalQMA, QMBUK, CKM-.SEW 6 .-3X 622058150 1200––optionalQMA, QMBP, N, U, C; 15 g/11 ms 4)M-.SEW 10 .1X 1022075150 1200––optionalQMA, QMBU, CZ4SE 10 .-1X/C106)150 1200–––A, B, E.WEH . ./.6E ;.WH 10 3224751100 800150 1200––optionalQMA, B, C, D, E, F, G, H, J, K, L, M,P, Q, R, S, T, U, V, W, Y, Z, U10; 15 g/11 ms 4)Impulse spooldesign type "O";spool returnhydraulicZ4WEH ;Z4WH 10 2224753,24761,24768100 800150 1200––optionalQME62, E63, E68, E50, E51, E52; 15 g/11 ms 4)Valves foralternatingvoltage "W" 5)Explanation of the footnotes see page 10.Further MTTFD values for products and special versions not listed here upon request.Bosch Rexroth AG, RE 08012, edition: 2017-01Valves foralternatingvoltage "W" 5)630 bar version

Reliability characteristics MTTFD values 5/10Proportional directional valvesTypeNGDatasheetMTTFD valuein years 1)Spoolpositionmonitoring2)4WRA(E) . .-2X 6, 1029055150 1200Admissiblespool designs 3);Maximum longitudinal spoolacceleration–E, W;in case of shock load, the spooloverlap can be left for a shortperiodExceptions/limitationsSwitch off "OBE"voltage supply4WRE(E) . .-2X 6, 1029061150 1200–E, W;in case of shock load, the spooloverlap can be left for a shortperiod4WREEM . -2X 6, 1029064150 1200yesE, W;in case of shock load, the spooloverlap can be left for a shortperiodAnalysis of the zeroposition upon request;switch off "OBE"voltage supply4WRPE 6 -2X 629024,29025150 1200–E, W; 15 g 4)Switch off "OBE"voltage supply;except qV 40 l/min1029122150 1200–E, E1, W6, W8; 15 g 4)Switch off "OBE"voltage supply6, 1029028,29032–C1, C3, C4, C5; 10 g 4)NG6: exceptqV 40 l/minNG10: max. operatingpressure 250 bar4WRPE 10 -3X 4WRPH . -2X 150 12004WRPEH . -2X 6, 1029035,29037150 1200–C1, C3, C4, C5; 10 g 4)Switch off "OBE"voltage supply;NG6: exceptqV 40 l/minNG10: max. operatingpressure 250 bar4WRPEH 6 -3X 629121150 1200–C1, C3, C4, C5; 10 g 4)Switch off "OBE"voltage supply;except qV 40 l/min4WRPNH . -2X 6, 1029191150 1200–C1, C3, C4, C5; 10 g 4)NG10: max. operatingpressure 250 bar4WRPDH . -2X 6, 1029391150 1200–C1, C3, C4, C5; 10 g 4)4WRKE . -3X 10 352907575 600–E, R, W; 15 g 4)Switch off "OBE"voltage supply4WRZ(E) . .-7X ;4WRH . .-7X 10 522911575 600150 1200–E, E1, E3, W6, W8, W9; 20 g 4)Switch off "OBE"voltage supply4WRZ(E)M . .-1X ;4WRHM . .-1X 10 252911775 1200150 1200yesE, W; 9 g 4)7)75 600150 1200yesE, W; 9 g 4)Switch off "OBE"voltage supply4WRZ(E) 32 .-7X.402,4WRH 32 .-7X.40232Switch off "OBE"voltage supply4WRL -3X ,4WRLEM -3X 10 352908775 600–E, E1, E(Z), E1(Z),E4, W, W1,W(Z),W1(Z)R, W2, W3, W4, R3,R5;NG10 and 16: 15 g 3)NG25 and 27: 10 g 3)4WRLE -4X 10 352912375 600–E, E1, W6, W8;NG10 and 16: 15 g 4)NG25 and 27: 10 g 4)Switch off "OBE"voltage supply4WRTE -4X 10 3529083150 1200–E, E1,W6, W8, Q2, RSwitch off "OBE"voltage supplyExplanation of the footnotes see page 10.Further MTTFD values for products and special versions not listed here upon request.RE 08012, edition: 2017-01, Bosch Rexroth AG

6/10MTTFD values Reliability characteristics2-way cartridge valves: Directional functionTypeNGDatasheetMTTFD valuein years 1)Spoolpositionmonitoring2)LC . A 7X ;LC . B 7X 16 63LC . A 6X ;LC . B 6X 80 100LFA . D-7X ;LFA . H-7X 16 63LFA . D-6X ;LFA . H-6X 80 100LFA . G-7X ;LFA . GW.-7X ;LFA . KW.-7X 16 63LFA . G-6X ;LFA . GW.-6X ;LFA . KW.-6X 80 100LFA . WE.-7X ;LFA . WEM.-7X ;LFA . WECA-7X 16 63LFA . WE.-6X ;LFA . WE.8-6X ;LFA . WEA9-6X 80 100LFA . E-7X QM ;LFA . EH2-7X QM ;LFA . EW.-7X QM 16 63Admissiblespool designs 3);Maximum longitudinal spoolaccelerationExceptions/limitations150 1200––150 1200––21010not relevant––21010not relevant––21010not relevant––21010150 1200QMCA, CBSpoolpositionmonitoringAdmissiblespool designs 3);Maximum longitudinal spoolaccelerationExceptions/limitations–Cracking pressure "00"(without spring)21010Cracking pressure "00"(without spring)Observe the reliabilitycharacteristic of thepilot control valveThe closed position isthe safe spool position2-way cartridge valves: Active logicsTypeNGDatasheetMTTFD valuein years 1)2)LC2A . D.-1X ;LC2A . A.-1X ;LC2A . B.-1X 16 10021040150 1200optionalQ7Explanation of the footnotes see page 10.Further MTTFD values for products and special versions not listed here upon request.Bosch Rexroth AG, RE 08012, edition: 2017-01