RE / Check-Q-meter type FD, series 2X. Ordering details FD 2X / V * Symbols 1/8. Replaces: 03.92

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1 RE 1/09.9 1/03.9 Check-Q-meter type FD, series Sizes 1, 1,, 3 Up to 0 L/min Up to 30 bar RE 1/09.9 Replaces: 03.9 Features: For installation in manifolds (cartridge valve), With SE flanged ports, For sub-plate mounting, porting pattern to DIN 30, form D, ISO 81 and CETOP RP 11 H, sub-plates to catalogue sheet RE 0 (separate order), Use sub-plate version when valve panel mounting. Functions: Pilot operated check valve, leak-free, The check-q-meter controls the returning flow q V in relation to the flow being directed into the opposite side of the actuater q V1. With cylinders the area tratio (q V = q V1 ϕ ) has to be taken into account, y-pass valve, free-flow in opposite direction, Optional built-on secondary pressure relief valve (only for valve with flange connections). K91/ Type FD..F../... with SE flanged ports, with and without secondary pressure relief valve Ordering details Nominal size 1 = 1 Nominal size 1 = 1 Nominal size = Nominal size 3 = 3 For manifold mounting (cartridge valve) = K For sub-plate mounting without secondary DV = P For SE flange connections without secondary DV = F For SE flange connections with secondary DV = F Series 0 to 9 = (0 to 9: unchanged installation and connection dimensions) Symbols FD / V * Further details in clear text V = FP seals, suitable for mineral oil to DIN 1 (HL, HLP) and phosphate ester (HFD-R) 00 = Without orifice 03 = Orifice Ø 0.30 mm (sizes 1 and 1) 0 = Orifice Ø 0.0 mm (size ) 0 = Orifice Ø 0.0 mm (size 3) (other orifice diameters on request) Pressure range of the secondary pressure relief valve Valve with SE flange connections (only for version "F") 00 = Pressure setting up to 00 bar 300 = Pressure setting up to 300 bar 00 = Pressure setting up to 00 bar Without secondary pressure relief valve With secondary pressure relief valve Valve type: FD 1 K /03.. FD 1 K /03.. FD K /0.. FD 3 K /0.. Valve type: FD 1 P /03.. FD 1 P /03.. FD P /0.. FD 3 P /0.. FD 1 F /03.. FD 1 F /03.. FD F /0.. FD 3 F /0.. Valve type: FD 1 F /.03.. FD 1 F /.03.. FD F /.0.. FD 3 F /.0.. T 1/8

2 RE 1/ Functional description, section Check-Q-meters are used in hydraulic systems to influence the speeds of hydraulic motors and cylinders independent of the load (prevents running away). In addition there is an isolator function for pipe burst safety. The check-q-meter comprises basically of the housing (1), main poppet (), pilot part (3), pilot spool (), damping spool () and pilot damping (). Lifting the load With free-flow from to the main spool () is opened. If the load pressure fails (e.g. pipe break between the directional valve and port ) then the main spool () immediately closes. This function is achieved by the connection of the load side () with chamber (8). Lowering the load (circuit examples) The direction of flow is from to. Port is connected to tank via the directional valve. The piston rod side of the cylinder has a flow applied which corresponds to the working conditions. The relationship between the control pressure at port and the load pressure at port = 1 : 0. When the control pressure is reached the pre-opening of the main spool takes place. Via the control spool () the pilot stage (3) is lifted off its seat and chamber (8) is de-compressed via this drilling and port to tank. t the same time the load pressure in port is no longer applied to chamber (8), this is due to the longitudinal movement of the pilot stage (3) within the main spool. The main poppet () is thereby unloaded. The reverse side of the control spool () at the main poppet (), lies against the collar of the damping spool (). The pressure required at port to open to is now only influenced by the spring in chamber (9). The pressure required to begin opening the connection to is 0 bar; to fully open the connection 0 bar is required. The opening cross-section for flow control increases progressively. It is created by the successive opeining of radial drillings in the bush and the main poppet () land. The relationship between the control pressure, cracking pressure and differential pressure determines the flow to the actuator via the connection of to. Thus uncontrolled running away of the actuator is prevented. The controlled lowering procedure is not affected even if there is a pipe burst between the directional valve and port. Guidelines for influencing the opening and closing times of the check-q-meter. Throttling of the opening sequence is via orifice () in the control spool () and both sides of the damping spool (). The orifice () is protected by sieves. The closing movement of the check-q-meter is virtually unthrottled. When being used in conjunction with cylinders the control line to port can be fitted with a throttle check valve (meter-out control) to influence the closing sequence. When being used in conjunction with motors a throttle check valve should not be fitted in the control line to port. In this case it is recommended that the control times of the directional valve are influenced. rr 9 3 T 8 1 /8

3 Circuit examples Differential cylinder On safety grounds, a closed centre directional valve should always be used! RE 1/03.9 Hydraulic motor So that the holding brake can operate both of the direction all valve ports have to be connected to port T in the de-energised position. If the brake is externally unloaded then it is possible to use a closed centre directional valve in the de-energised condition. Note: Two check-q-meters cannot be used to control two cylinders which are forced mechanically to move together, as synchronisation and the same pressure cannot be guaranteed in each cylinder. Therefore, the cylinders have to be equipped with two pilot operated check valves, type SL. The check-q-meter is fitted in a common line. In this case, the load pressure must not exceed 00 bar! Y 3/8

4 RE 1/ Technical data (for applications outside these parameters, please consult us!) Operating pressure, ports, bar up to 30 Operating pressure, port bar up to 0 Pilot pressure, port (flow control range) min. 0 to 0 bar, max. 30 bar Cracking pressure, to bar Setting pressure for secondary pressure relief valve bar up to 00 Flow L/min 80 (size 1), 00 (size 1), 30 (size ), 0 (size 3) rea ratio of the pre-opening poppet seat area 1 = area of pilot spool 0 Pressure fluid mineral oil to DIN 1 (HL,HLP); phosphate ester (HFD-R) Pressure fluid temperature range C 0 to + 80 Viscosity range mm /s 10 to 800 Degree of contamination maximum permissible degree of contamination of the pressure fluid is to NS 138 class 9. We, therefore, recommend a filter with a minimum retention rate of β 10. Characteristic curves (measured at ν = 1 mm and ϑ = 0 C) p Pressure differential in bar Pressure differential p in relation to flow q v, measured at throttle position: Throttle fully open ( p x = 0 bar) to q v Flow in L/min 1 = size 1 = size 1 3 = size = size 3 Pressure differential in bar p Flow in L/min q v Pressure differential p in in relation to flow q v, measured over the check valve to /8

5 Unit dimensions: valve for assembly into manifolds (cartridge valve) RE 1/ (Dimensions in mm) 1 Ø,1 G 1/ Ø D1 +0, Ø D +0,1 D3 y y L10 +0,1 L11 L1 Ø 0,0 L1 0,3 30 Ø D H8 Ø D +0, Ø D8 R, x Ø D x x 0 L Ø D8 L +0, L L3 0, L±0, L±0, L8 L9 D9; T1 1±0, R, x = R z 1 Ø D y = R z 8 1±0, 1 Control port Name plate Tightening torque of cartridge valve: for size 1: Nm size : 110 Nm size 1: Nm size 3: 0 Nm Ports and can be optionally arranged about the circumference. ttention! The valve fixing holes must not be damaged. Pipe threads G to ISO 8/1 Type 1 D1 D D3 D D D D D8 D9 T1 L1 L L3 L L L FD 1 K / x FD 1 K / x FD K / x FD 3 K /... 9 x Type L L8 L9 L10 L11 L1 Valve fixing screws/tightening torque in Nm Weight FD 1 K / off 10 x 0 DIN kg FD 1 K / off 10 x 0 DIN kg FD K / off 1 x 80 DIN kg FD 3 K / off 1 x 100 DIN kg /8

6 RE 1/10.91 Unit dimensions: for SE flange connections, without secondary pressure relief valve (Dimensions in mm) Ø D1; T1 Ø D Ø ;1 G 1/ Ø ;1 G 1/ 1 H H1 1 L L Ø D3 Ø D L L 3 Ø D; T 1 () 3 L1 L L3 SE flange connection: Operating pressure 000 PSI (0 bar) Flange mounting screws and blanking flange are included within the scope of supply. 1 Control port 3 Flange fixing screws Optional port Name plate easuring port lanking flange O-fing Pipe thread "G" to ISO 8/1 Type 1 3 D1 D D3 D D H1 H FD 1 F / FD 1 F / FD F / FD 3 F / Type L1 L L3 L L L T1 T Weight O-ring () FD 1 F / kg x 3. FD 1 F / kg x 3. FD F / kg 3.9 x 3.3 FD 3 F / kg 3. x 3.3 /8

7 Unit dimensions: for SE falnge connections, with secondary pressure relief valve RE 1/ (Dimensions in mm) 8 Ø D1; T1 Ø ;1 Ø D3; T Ø D G 1/ D 1 Ø ;1 G 1/ T H H1 H3 1 L8 L Ø D Ø D L L Ø D; T3 1 3 L () T 3 L1 L L3 SE flange connection: Operating pressure 000 PSI (0 bar) Flange mounting screws and blanking flange are included within the scope of supply. L 1 Control port lanking flange O-ring easuring port Optional port 8 Secondary pressure relief valve 3 Flange fixing screws Name plate Pipe threads "G" to ISO 8/1 Type 1 3 D1 D D3 D D D D H1 H FD 1 F / G 1/ FD 1 F / G 1/ FD F / G 3/ FD 3 F / G 3/ Type H3 L1 L L3 L L L L L8 T1 T T3 Weight O-ring () FD 1 F / kg x 3. FD 1 F / kg x 3. FD F / kg 3.9 x 3.3 FD 3 F / kg 3. x 3.3 /8

8 RE 1/10.91 Unit dimensions: for sub-plate mounting (Dimensions in mm) Ø ;1 G 1/ H3 Ø ;1 G 1/ Ø 3 H 1 H1 1 3 L L8 L1 L Sub-plates to catalogue sheet RE 0 must be ordered separately. Sub-plates for: sizes 1 and 1 size size 3 G 0/01 (G 3/8) G 1/01 (G 3/) G 1/01 (G 1 1/) G 1/01 (G 1/) G 13/01 (G 1) G 1/01 (G 1 1/) Note! Only use a sub-plate mounting valve for panel mounting! 8/8 annesmann Rexroth G D-9813 Lohr am ain Jahnstraße 3- D-981 Lohr am ain Telefon 0 93 / 18-0 Telefax 0 93 / Telex L1 L3 L L L The specified data is for product description purposes only and may not be deemed to be guaranteed unless expressly confirmed in the contract. ll rights reserved Subject to revision Ø 11 0,01/100mm R max Required surface finish of mating piece Not for sizes 1,1 and 1 Control port valve fixing holes for sizes 1, 1 and. easuring port valve fixing holes for size 3 3 Locating pin Name plate Pipe threads G to ISO 8/1 Type 1 3 H1 H H3 L1 L L3 L L L FD 1 P / FD 1 P / FD P / FD 3 P / Type L L8 Valve fixing screws/tightening torque in Nm Weight O-ring () FD 1 P / off 10 x 100 DIN kg 1.3 x. FD 1 P / off 10 x 100 DIN kg 1.3 x. FD P / off 10 x 10 DIN kg 9.8 x. FD 3 P / off 10 x 10 DIN kg 38 x 3 annesmann Rexroth Limited Cromwell Road, St. Neots, Huntingdon, Cambs. PE19 ES Tel: (0180) 01 Fax: (0180) 190