Flow Control Valve Series SRC.. plug-in coil for easy coil change flow rates are unaffected by changes in temperature or load compact design reduced p ZnNi coating (>70h DIN EN ISO 97 NSS) Description. General Flow control valves SRC are used to set the working speed of hydraulic actuators, and the setting is load independent and pressure compensated. When used as a -way valve, the higher pressure can be at either the constant flow or surplus flow port. When used as a two-way flow. pplication examples Belt drives Spinner-plate drives uger drives Brush drives control, omit the surplus-flow drilling, or plug it. The special orifice design ensures that the flow setting is largely independent of the viscosity of the fluid. The valve's cartridge construction allows to design a hydraulic system that meets the client's precise requirements. Reel drives Pump drives for other liquids Fans, blowers Symbols. -way flow control. -way flow control. Schematic representation T R P Reference: 00-P-00044-EN-05 Issue:.08 /7
Technical data General characteristics Unit Description, value Design screw-in cartridge Flow direction P controlled P B surplus flow discharge (can be pressurised) Seals NBR De-energised position orifice closed Mounting attitude unrestricted; preferably with coil at bottom end (automatic air bleed) Commissioning bleed all air from the system (if possible, operate valve several times without load) Electrical characteristics Unit Description, value Design high pressure; wet armature Supply voltage VDC or 4 from an electronic controller Power consumption Watt Proportional operation: 6 with V and I max = 50 m 6 with 4 V and I max = 675 m ON/OFF operation: 7 with V / 4 V Dither frequency recommended Hz 00 Relative duty cycle 00 % Protection class (with a properly-fitted plug) DIN plug IP54 MP Junior Timer IP65 Deutsch plug IP67 Electrical connection plug-base with pins to DIN EN 750-80 MP Junior Timer plug connector (-pole) Deutsch plug DT04-P-EP04 Hydraulic characteristics Unit Description, value Constant flow range l/min 0, 6, 5,, 40, 50 ) Inlet flow l/min max. 60 ) Operating pressure bar max. 50 Leakage cm /min max. 60 at 00 bar ) (or virtually zero if the priority flow discharges to tank) Min. pressure difference (pressure compensator) bar 4 7 Control accuracy (as a % of the nominal flow): Load-dependency when under pressure Hysteresis when operated max. ±,5 % ) max. ±,5 % ) Fluids mineral oil to DIN 554 and DIN 555 ) Fluid temperature range C -0... +80 Viscosity range mm /s 0... 00 Maximum admissible level of contamination of the hydraulic fluid ISO 4406 class 0/8/5 (see paragraph 0) ) Values refer to an oil viscosity of 5 mm /s (cst). ) For higher pressures, consult Bucher Hydraulics. ) Values refer to the selected flow range. /7 Flow Control Valve SRC..
4 Performance graphs 4. Q - I characteristic curve 4. Variation in flow Q (%) Q [l/min] 00 75 max. +,5% -,5% Q max Q 50 5 0 50±50 500 750 000 5±5 50±00 65±50 I [m] bei V I [m] bei 4 V 0 50 00 50 00 50 p [bar] Q - I characteristic at 50 L Q - I characteristic at 5 L Fine control range Q - constant flow pressurised Q - surplus flow pressurised 4. Pressure drop during vented bypass P B p [bar] 4 0 8 6 4 0 0 0 0 0 40 50 Q zu [l/min] 60 4.4 Q zu - Q characteristic curve Flow rate at actuator port Q as a function of Q zu and constant flow rate. Q - [l/min] 60 55 50 45 40 5 0 5 0 5 0 05 0 0 0 0 40 50 Q zu [l/min] 60 6 5 4 Pressure loss area (The actual pressure-loss characteristic is dependent on the tank pressure at port B) Control valve throttling curve (Dependent on body used) Control - p - characteristic 4 bar Constant flow range 0 l/min Constant flow range 6 l/min Constant flow range 5 l/min 4 Constant flow range l/min 5 Constant flow range 40 l/min 6 Constant flow range 50 l/min Flow Control Valve SRC.. /7
5 Dimensions P B T Mx,5 6 9 77 Priority flow (controlled) P Inlet B Surplus flow (-way) T Priority flow discharge with closed orifice 6 Models 6. Manual override 6.. Emergency pin, SRC.S.. M = max. 6 Nm 4 max. Ø 4mm Emergency pin IMPORTNT : By pressing the solenoid pin (), you operate the valve ON/OFF. 6.. Basic manual override, SRC.T.. Q 0 to Q max. = about one turn of the handle ca. 07 4/7 Flow Control Valve SRC..
6. Sockets GDM plug to DIN 4650 G MP Junior Timer J Deutsch plug DT04-P-EP04 D 7 Ordering code S R C 0 5 0 S - 0 G / Flow control valve SR Cartridge Size Constant flow rate (0, 6, 5,, 40, 50 l/min) z.b. 0...50 l/min = 050 Type of operator solenoid + emergency pin = S solenoid + deluxe manual override = T -way (can also be used as a -way flow control) = Design stage (to be inserted by the factory) Plug connector GDM plug (DIN) = G MP Junior Timer = J Deutsch plug = D Proportional solenoid supply voltage DC Volt = DC 4 Volt = 4 Options (to be inserted by the factory) Flow Control Valve SRC.. 5/7
8 Cavity body 8. Cavity type GBWM for -way flow control valves Ø 0,05 0 0 0 0 Ø 0,05 Ø 40 Ø5 M x,5 Ø -0, -0, Ø Ø 6 Ø 7 Ø 8 Ø 0 Ø 5 0, 6 5 0,05 6 5 Whole cavity type Ra,6 6,5±0, 9 6±0, (reamed depth ) 7±0, 88±0, 9,5±0, 99 Form tool T0 (order number: 0060896) to machine own cartridge cavities can be hired on request. 8. Housing variants 8.. Example of a complete valve block SRCVM-.***-0M 8... Flow control valve with solenoid and emergency pin 4 75 55 75 0 6/7 Flow Control Valve SRC..
8.. Example of a complete valve block SRCVM-.***-0M 8... Flow control valve with solenoid and emergency pin 0 90 0 90 4 9 Fluid Flow control valves require fluid with a minimum cleanliness level of ISO 4406 code 0/8/5. We recommend the use of fluids that contain anti-wear additives for mixed-friction operating conditions. Fluids without appropriate additives can reduce the service life of the valves. The user is responsible for maintaining, and regularly checking the fluid quality. 0 Fluid cleanliness class Cleanliness class (RK) onto ISO 4406. Code ISO 4406 Number of particles / 00 ml 4 m 6 m 4 m //8 8000000 000000 50000 /0/8 4000000 000000 50000 /0/7 4000000 000000 0000 /0/6 4000000 000000 64000 /9/6 000000 500000 64000 0/8/5 000000 50000 000 9/7/4 500000 0000 6000 8/6/ 50000 64000 8000 7/5/ 0000 000 4000 6/4/ 64000 6000 4000 6/4/ 64000 6000 000 5//0 000 8000 000 4//9 6000 4000 500 //8 8000 000 50 info.kl@bucherhydraulics.com www.bucherhydraulics.com 08 by Bucher Hydraulics GmbH, D-7977 Klettgau ll rights reserved. Data is provided for the purpose of product description only, and must not be construed as warranted characteristics in the legal sense. The information does not relieve users from the duty of conducting their own evaluations and tests. Because the products are subject to continual improvement, we reserve the right to amend the product specifications contained in this catalogue. Classification: 40.0.0.05. Flow Control Valve SRC.. 7/7