Flow Control Valve. 1 Description. 2 Symbols. Series SRCA General. 1.2 Application examples way flow control way flow control

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1 Flow Control Valve Series SRC.. plug-in coil for easy coil change flow rates are unaffected by changes in temperature or load. compact 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 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.. pplication examples Belt drives Spinner-plate drives uger drives Brush drives Reel drives Pump drives for other liquids Fans, blowers Symbols. -way flow control. -way flow control P P P P B B. Schematic representation T R P Reference: 00-P EN-04 Issue: 0.06 /7

2 Technical data General characteristics Unit Description, value Design Flow direction Seals De-energised position Mounting attitude Commissioning screw-in cartridge P controlled P B surplus flow discharge (can be pressurised) NBR orifice closed unrestricted; preferably with coil at bottom end (automatic air bleed) 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 6 with V and I(Q nom ) 6 with 4 V and I(Q nom ) Dither frequency recommended Hz 00 Relative duty cycle 00 % Protection class (with a properly-fitted plug) DIN plug - IP65 MP Junior Timer - IP65 Deutsch plug - IP67 Electrical connection plug-base with pins to DIN EN MP Junior Timer plug connector (-pole) Deutsch plug DT04-P-EP04 Hydraulic characteristics Unit Description, value Constant flow range l/min 6, 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 4) Fluid temperature range C Viscosity range mm /s Filtration NS 68 class 9, ISO 4406 class 0/8/5; achievable with a filter rating of ß 0 75 ) 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..

3 4 Performance graphs 4. Q - I characteristic curve 4. Variation in flow Q (%) Q [l/min] max. +,5% -,5% Q max Q ± ±5 50±00 I [m] bei V 65±50 I [m] bei 4 V 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] Q zu [l/min] Q zu - Q characteristic curve Flow rate at actuator port Q as a function of Q zu and constant flow rate Q - [l/min] Q zu [l/min] 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 6 l/min Constant flow range 0 l/min Constant flow range 6 l/min 4 Constant flow range 5 l/min 5 Constant flow range l/min 6 Constant flow range 40 l/min 7 Constant flow range 50 l/min Flow Control Valve SRC.. /7

4 5 Dimensions P B T Mx, = Priority flow (controlled) B = Surplus flow (-way) P = Inlet T = Priority flow discharge with closed orifice 6 Models 6. Manual override 6.. Emergency pin, SRC.S.. M = max. 6 Nm max. 4 mm 4 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..

5 6. Sockets GDM plug to DIN G.. MP Junior Timer -J..- Deutsch plug DT04-P-EP04 -D..- 7 Ordering code S R C S - 0 G / Flow control valve SR Cartridge Size Constant flow rate (0, 6, 5,, 40, 50 l/min) z.b 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

6 8 Cavity body 8. Cavity type GBWM for -way flow control valves Ø 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, gesamte Ra,6 Bohrung= 6,5±0, 9 6± 0, (Reibtiefe ) 7±0, 88±0, 9,5±0, 99 Form tools for customers who wish to machine their own cartridge cavities can be hired on request. 8. Housing variants 8.. Example of a complete valve block SRCVM-.***-0M /7 Flow Control Valve SRC..

7 8.. Example of a complete valve block SRCVM-.***-0M Fluid Flow control valves require fluid with a minimum cleanliness level of NS 68, class 9 or 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. 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. Bucher Hydraulics recommends a load capacity of > 0 N/mm to Brugger DIN Fluid cleanliness class Cleanliness class (RK) onto ISO 4406 and NS 68 Code ISO 4406 Number of particles / 00 ml 4 m 6 m 4 m NS 68 // /0/ /0/ /0/ /9/ /8/ /7/ /6/ /5/ /4/ /4/ // // // info.kl@bucherhydraulics.com 06 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: Flow Control Valve SRC.. 7/7