Directional control valve / RM 270

1 Solutions that power your visionsData sheetDirectional control valve / RM 270 Nordhydraulic Box 189 (Industriv gen 15)SE-872 24 KRAMFORSS wedenTelephone: Int. +46 612 71 72 00 Telefax: Int. +46 612 71 72 15E-mail: control valve / RM 27031-02-RM270-05 RM 270S o l u t i o n s t h a t p o w e r yo u r v i s i o n s Make use of the Nordhydraulic expertiseOur skilled and experienced design and application engineers are at your disposal, helping you to specify the valve configuration that meets your application valve featuresThe RM 270 is a monoblock valve , designed for system pressures up to 350 bar and pump flows up to 160 is available with 1, 2, 3, 4, and 6 sections per valve is designed with an open centre for fixed displacement valve can be operated manually or by pneumatic and electro-pneumatic remote SuperRapid -range of the valve is optimized for maximum lowering flow of 185 l/min and allows lowering at the same time as another function is valve offers excellent operating characteristics because of the specially designed spools for different and uniform spool forces are the result of careful balancing of the flow applications are cranes, tippers, refuse trucks, multi-bucket systems and roller container vehicles.

2 Several special versions of RM 270 fulfil many other RM 270 properties and possibilities Each section can be provided with a pressure relief valve , an anticavitation valve or a combination of these. There are many varieties of spools and spool con-trols which make the valve suitable for a wide range of applications. Two or more blocks can be connected in series. The valve can be supplied with a built-in unloading valve , which in an emergency situation makes it pos-sible to let all the pump flow go to tank at a very low pressure drop. A combination of built-in flow control -, unloading- and counter pressure valves gives a compact solution and less mounting parts for refuse trucks. Possibility for built-in load holding valves. In systems with demand for both high and low flows the valve can be combined with RS 210.

3 The adapter between the valves includes a flow control valve for reduced flow to the RS 210 working of contents Technical data ..page 3 Dimensions, weight ..page 4 Relief valves ..page 5 - 6 Electrical unloading valve ..page 7 Spool controls ..page 9 High pressure 10 Super Rapid ..page 12 Data sheetThis data sheet presents a selection of standard com-ponents and how to specify these in a valve assembly according to your application requirements. For further information on RM 70 and available components, please contact Nordhydraulic. RM 270 RM 270S o l u t i o n s t h a t p o w e r yo u r v i s i o n s120 140 16000(bar)24 l/min60402080 100Q6P18060024(bar)20 60P100 l/min140Q8 Technical dataPressures / flowMax. system pressure* .. 350 bar (35,0 MPa) Max continuous return line pressure.

4 20bar (2,0 MPa) Rated flow ..120 l/min*depending on application Further dataSpring force for spool control 9 in neutral position: 130 N (13,0 kp). Spring force for spool control 9 with fully selected spool: 155 N ( kp). Recommended contamination level at normal duty: equal to or better than 18/14 as per ISO fluid viscosity range at continuous operation:10-400 mm2/s(cSt). Higher viscosity allowed at start up. Mineral oil and synthetic oil based on mineral oil are hydraulic fluid temperature range for continuous opera-tion: -15 C - + 80 leakage at 100 bar, 32 cSt and 40 C: <20 cm3/min. Pressure drop P-T unloadedPressure drop P - ABPressure drop P-T6-sections** 6-sections* ** With spools optimized for 30-50 l/min* With spools optimized for 50-90 l/min 4-sections*3-sections*2-sections*1-secti on*6-sections4-sections3-sections2-secti ons1-sectionPressure dropPressure drop A-T valve Super Rapid 1-section valvePump flow130 l/minPump flow0 l/minOil temperature/viscosity for all graphs: + 50 C / 32 cSt RM 270S o l u t i o n s t h a t p o w e r yo u r v i s i o n s P1 G3/4"11L G3/4"A,B G3/4"T1 G1"P2 G3/4"4012 LBLAT echnical data - Dimensions, weightWeights, complete valve : 1 section.

5 11 kg 2 kg 3 kg 4 kg 6 kgMeasurementsL mmLF mm1 section1281002 sections178,31503 sections228,62004 sections278,92506 sections379,5350 TypeLA mmLB mm9 431043117513751475P109P5157EP109 MSLA48,5M1938,5M21132M21255,5 Spool stroke +/- 7 mmFloat position 7 mm RM 270S o l u t i o n s t h a t p o w e r yo u r v i s i o n sMain relief valveMain relief valve TBD203 The TBD 0 is a differential area, direct acting relief valve for the main circuit. It is adjustable and range: - 0 bar ( , - ,0 MPa).Setting range step: port valvesPort relief valve TBD204 The TBD 0 is a differential area, direct acting relief valve for the secondary circuit. It is adjustable and range: - 0 bar ( , - ,0 MPa).Setting range step: bar. RM 270S o l u t i o n s t h a t p o w e r yo u r v i s i o n s Service port valvesPort relief and anticavitation valve TBSD204 The TBSD 0 is a differential area, direct acting relief and anticavitation valve for the secondary circuit.

6 It is adjus-table and range: - 0 bar ( , - ,0 MPa).Setting range step: valve SB204 The anticavitation valve service to ensure that, in the event of a lower pressure in the cylinder port than in the tank, oil can be drawn from the system oil tank to the consumer. 7 RM 270S o l u t i o n s t h a t p o w e r yo u r v i s i o n sElectrical unloading valveDataPower consumption ..14 WRated voltage ..12 and 24 VMax voltage variation ..+/- 10%Duty factor ..100%Connection ..Hirschmann ISO 4400-DIN 43650 Protection manual override with push operation 1 manual override with push operation V. RM 270S o l u t i o n s t h a t p o w e r yo u r v i s i o n s Spool controls - A-sideSpool control 99 Spring centering. 9W for cable control 10 Detents at positions 1, and .Spool control 13 Spring centering with de-tent at position.

7 Spool control 14 Spring centering with detent at position .Spool control 11 Spring centering with detent at position .Spool control PPneumatic*.Spool control EPElectro/pneumatic on/off**.Spool control MSLAS pool control , stroke control EP5 Electro/pneumatic on/off with detent in position **.Spool control P5 Pneumatic control with detent at position *.Spool controls - B-sideBracket for -pos. M19 Bracket for -position spool and for -pos EP-spool control . Bracket M211 Bracket for -position spool with manual M212**Power consumption ..4,8 WRated voltage ..24 V Max voltage variation ..+/- 10% Duty factor- ..100% Connection ..according to EN175301-803/B Protection *Connection ..G 1/8 BSP 9 RM 270S o l u t i o n s t h a t p o w e r yo u r v i s i o n sSpools Spools for general use FunctionCode Double acting spool10 XAA1 Slewing spool, gentle operating10 XKS1 Single acting spool P - A 0 XAA1 Single acting spool P - B 0 XAA Motor spool 0 XAA1 Motor spool A - T 0 XAA Motor spool B - T 0 XAA1 Double acting spool with th pos.

8 For float 0 XAA1 Regenerative spool 0 XAA1 Single acting SR *1 lpm lowering flow713TA1 Generally the spools are divided in different flow ranges. In the table only the accessibility of different functions are shown. The letter indicating flow range is replaced with X, as some spool functions are available in several flow ranges. = 0 - 0 lpm = 0 - 0 lpm = 0 - 0 lpm 7 = 0 - 90 lpm 1 = 90 - 1 0 lpmThe RM 70 spools are available in variety of flows and styles to accomodate most design requrements. Since the development of spools is a continous process and all avai-lable spools are not described in this data sheet, contact Nordhydraulic for advice on choosing spools in order to optimize your valve configuration. 10RM 270S o l u t i o n s t h a t p o w e r yo u r v i s i o n s 10B1P1P2A1A2A3T2P2A1A2T2B2B1B3B2 High pressure carry-overHigh pressure carry-over nipple SG25 The type SG series nipple is used for series mounting of valve blocks when pipe or hose is used between the RM 70 Super Rapid see page 1.

9 High pressure carry-over flange kit SC250 The type SC 0 flange kit is used to connect valve blocks in series, without any pipe or RM 70 Super Rapid see page 1 .When high pressure carry over SG or SC 0 is used for series mounting, the tank connection T for the first valve must always be connected to the tank (see diagram above). valve blocks connected in series give priority of flow to the first block in the series. This means that there will be no flow at block if block 1 is fully pressure carry-over 10 10 11 RM 270S o l u t i o n s t h a t p o w e r yo u r v i s i o n sT1B1P2A1A2T2B1B2T1P112P1A1T2P23 Integrated pressure carry-over function and extra check valveThe valve is made from a 1 section valve with a shuttle spool to create the pressure carry-over function, and an extra check valve in the pressure line.

10 Carry-over pressure can be obtained from both A and B port, depending of which is used. The built in shuttle spool makes it possible to use the return flow from, for instance, a hydraulic winch mo-tor on a cable lift, to regulate the downward movement of the tipper cylinder at the same time as the winch pulls the platform on the frame. The extra check valve prevents the oil from running backwards in the system when only the tipper valve is Dual-flow valve , separately Directional control valve with internal pressure carry- over function and extra check . Directional control valve for tipper tipper cylinder on trailer 1 RM 270S o l u t i o n s t h a t p o w e r yo u r v i s i o n sT1T2P1B1P2A1B2B1A2 PPA1 PTS Super Rapid - tipping valve configuration Technical dataThe Super Rapid tipping valve is optimized for maximum lowering flow.