4/3 Proportional Directional Valve, Size SAE 10

Transcription

1 / Proportional Directional Valve, Size SAE Q max =. gpm [ l/min], p max = psi [ bar] Direct acting, sliding-spool design, with solenoid operation Series PDFC- Description Series PDFC proportional directional valves are direct acting screw in cartridges with a sliding spool design and a / UNF mounting thread. In the neutral position, port is closed and depending on the spool type, ports and are connected to tank () (spool configuration M) or ports, and are all blocked (spool configuration L). The version with the M spool is used in motor control circuits where free wheeling in the neutral position is required. The L configuration is the version to use for cylinder applications. These cartridges are particularly suitable for precise and controlled lifting and lowering movements and can also be used for reliable operation in mobile and industrial applications. Best controllability is achieved when using the valve with a bypass pressure compensator to control pressure drop through the valve. Using the valve without pressure Compact construction for cavity type C /- UNF Operated by a proportional high pressure wet-armature solenoid Minimum current threshold/ dead band (position b) is factory set for better consistency Manual over-ride optionally available, detented in neutral position Excellent reproducibility and repeatability, and low hysteresis All exposed parts with zinc-nickel plating The slip-on coil can be rotated, and it can be replaced without opening the hydraulic envelope Various plug-connector systems and voltages are available Can be fitted in a line-mounting body compensator is not recommended because higher pressure drops cause the flow to be more restricted (see performance graph). The proportional directional valves is optionally equipped with a manual over ride which is detented in the neutral position. To unlatch the detent mechanism, the button on the back can be pushed. That allows shifting the valve in both directions. Pushing the knob shifts the valve to position (a) ( and ) and pulling shifts it to position (b) ( and ). All external parts of the cartridge are zinc plated and chromited (CrVI-free). The slip-on coils can be replaced without opening the hydraulic envelope and can be positioned at any angle through. If you intend to manufacture your own cavities or are designing a line-mounting installation, please refer to the section Related data sheets. Symbol PDFC-- -M-M PDFC-- -L-M PDFC-- -M- PDFC-- -L- Reference: -P--EN- Issue:. /

2 Technical data General characteristics Designation / proportional directional valve Design sliding-spool design, direct acting, with solenoid operation Mounting method screw-in cartridge /- UNF Tightening torque ft-lbs [ Nm] Size size SAE, cavity type C Weight. lbs [. kg] Mounting attitude unrestricted (preferably vertical, coil down) Ambient temperature range - F + F [- C + C] Hydraulic characteristics Maximum operating pressure - ports,, - port Maximum flow rate - port and - port and psi psi higher pressure, please consult BUCHER [ bar] [ bar]. gpm at p psi [ l/min at p bar]. gpm at p psi [ l/min at p bar] at % duty cycle Leakage flow rate (port to port) inch at psi [ ml/min at bar] Hydraulic fluid HL and HLP mineral oil to DIN ; for other fluids, please contact BUCHER Hydraulic fluid temperature range - F + F [- C + C] Viscosity range Minimum fluid cleanliness Cleanliness class to ISO : 999 mm /s (cst), recommended... mm /s (cst) class // Electrical characteristics Supply voltage Control current Power consumption at max. control current Coil resistance R - cold value at C - max. warm value Recommended PWM frequency (dither) Hysteresis with PWM Reversal error with PWM Sensitivity with PWM Reproducibility with PWM V DC, V DC V = ma, V = ma (% duty cycle) V = ma, V = ma (% duty cycle) max. 9 W V =. / V =.9 V = 9. / V =. Hz % I N % I N <. % I N < % p N Relative duty cycle % / % Protection class to ISO / EN 9 Electrical connection IP / IP / IP 9K, see Ordering code (with appropriate mating connector and proper fitting and sealing) -pin square plug to ISO / DIN (standard) for other connectors, see Ordering code / -P--EN-/. Series PDFC-

3 Performance graphs Q = f (I; p) Flow rate adjustment characteristic M Q [gpm] B) A) 9 EL_P9.ai A) B) Coil b, connections ; I [ma] Coil a, connections ; [] [] p = psi p = psi p = 9 psi [] p = 9 psi [9] p = psi p = psi [] p = psi p = 9 psi p = psi p = 9 psi 9 9 A) % duty cycle B) % duty cycle --- depending on coil temperature, solenoid may draw a voltage higher than the nominal voltage [] [] [] [.] [.] Q = f (I; p) Flow rate adjustment characteristic L Q [gpm] B) A) 9 EL_P9.ai A) B) Coil b, connections ; I [ma] Coil a, connections ; [] [] p = psi p = psi p = 9 psi [] p = 9 psi [9] p = psi p = psi [] p = psi p = 9 psi p = psi p = 9 psi 9 9 A) % duty cycle B) % duty cycle --- depending on coil temperature, solenoid may draw a voltage higher than the nominal voltage [] [] [] [.] [.] p = f (Q) Pressure drop - Flow rate characteristic M Q [gpm] M, coil a [ma] Valve completly open p [bar] 9 M, coil b [ma] 9 p = f (Q) Pressure drop - Flow rate characteristic L Q [gpm] p [bar] 9 L, coil a [ma] Valve completly open L, coil b [ma] 9 P.ai p [psi] p [psi] P.ai p [psi] p [psi] -P--EN-/. Series PDFC- /

4 Dimensions & sectional view / proportional directional valve 9. [,]. * [,]. [,]. [,] a b / UNF / Ma =... ft lbs [... Nm] Ma = ft lbs [ Nm] Seal kit. Push button to unlatch manual over-ride Item Qty. Description b a. Push or pull on whole handle to shift valve to position a or b O-ring x O-ring no. 9. x.9 [9, x,] O-ring no.. x. [, x,] O-ring no.. x. [, x,] O-ring no..9 x. [, x,] Backup ring. x. x. [, x, x,9] Backup ring. x. x. [, x, x,9] Backup ring. x. x. [,9 x, x,9] * overall length without manual over-ride. []. [,] IMPORTANT! Item no. = Seal kit NBR (Buna) Item no. = Seal kit FKM (Viton) Installation information ATTENTION! Only qualified personnel with mechanical skills may carry out any maintenance work. Generally, the only work that should ever be undertaken is to check, and possibly replace, the seals. When changing seals, oil or grease the new seals thoroughly before fitting them. IMPORTANT! When fitting the valves, use the specified tightening torque for the mounting bolts. No adjustments are necessary, since the cartridges are set in the factory. / -P--EN-/. Series PDFC-

5 Ordering code PDFC - - N - M - A - M - - D _ PDFC = proportional directional valve = nominal size SAE N = NBR (Nitrile) seals (standard) V = FKM (Viton) seals (special seals - please consult BUCHER) L = cylinder spool, all ports closed in neutral M = motor spool, and connected to tank in neutral A = factory set min current threshold at position b M = with manual over-ride = without manual over-ride = cartridge only BA = line-mounting body G/ BSPP aluminum BS = line-mounting body G/ BSPP steel BA = line-mounting body G/ BSPP aluminum BS = line-mounting body G/ BSPP steel TA = line-mounting body SAE-# aluminum TS = line-mounting body SAE-# steel TA = line-mounting body SAE-# aluminum TS = line-mounting body SAE-# steel... = voltage e.g. ( V) D = current DC (blank) = ISO / DIN mating plug (standard, IP ) M = without mating DIN plug C = Kostal plug connection (IP ) JT = Junior Timer radial plug connection (with protection diode, IP) IT = Junior Timer axial plug connection (with protection diode, IP) D = Deutsch plug connection DT-P (IP /9K) mating plug not supplied DT = Deutsch plug connection DT-P (with protection diode, IP /9K) S = AMP Superseal. (IP ) / Metri-Pack (IP ) F = flying leads ( mm) Related data sheets Reference (Old no.) Description -P- The form-tool hire programme -P- (-.) Cavity Type C -P- (-.) Line-mounting body, Series -way info.el@bucherhydraulics.com by Bucher Hydraulics, Inc., Northwest Parkway, Elgin, Illinois, USA All 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: P--EN-/. Series PDFC- /