Prop. 3-Way Pressure-Reducing Cart., Size 5 / SAE 08

Transcription

1 Prop. -Way Pressure-Reducing Cart., Size / SAE 8 Q max = 1 l/min (4 gpm), p max = bar (6 psi) Direct acting, electrically operated 1 Description proportional -way pressure-reducing cartridges are size / SAE 8, high performance screwin cartridges with an /4-16 UNF mounting thread. They reduce the outlet pressure in as a function of the control current signal and independently of the inlet pressure in 1. In the initial position (solenoid de-energised) the inlet of the -way pressure-reducing cartridge is shut off and the outlet is connected to tank (port ). In control mode, the connection 1 opens until the pressure in port reaches the preset level. If the pressure rises above the preset level, the control spool opens the connection until balance is attained. Two pressure ranges are available, with maximum Compact construction for cavity type AM /4-16 UNF Operated by a proportional solenoid pressure ranges available Excellent stability over the whole pressure and flow range All exposed parts with zinc-nickel plating High pressure wet-armature solenoids 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 operating pressure (inlet pressure) p max bar. These -way pressure-reducing cartridges are predominantly used for reducing a system pressure in mobile and industrial applications. Thanks to the special terminal assignment, a proportional function can be achieved in manifold control blocks featuring WK... valves by using these valves in a way that does not require any redesign of the block. All external parts of the cartridge are zinc-nickel plated to DIN 979 and are thus suitable for use in the harshest operating environments. If you intend to manufacture your own cavities or are designing a line-mounting installation, please refer to the section Related data sheets. Symbol Technical data General characteristics Designation proportional -way pressure-reducing cartridge Design direct acting, electrically operated Mounting method screw-in cartridges /4-16 UNF Tightening torque 4 Nm ± 1 % ( ft-lbs ± 1 %) Size nominal size / SAE 8, cavity type AM Weight.4 kg (.9 lbs) Mounting attitude unrestricted (preferably vertical, coil down) Ambient temperature range - C + C (-1 F +1 F) Reference: 4-P-911-EN- Issue:.17 1/

2 Hydraulic characteristics Maximum operating pressure bar (6 psi) Maximum flow rate 1 l/min (4 gpm) Nominal pressure ranges 4 bar, 7 bar (64 psi, 1 psi) Flow direction see symbols Hydraulic fluid HL and HLP mineral oil to DIN 1 4; for other fluids, please contact BUCHER Hydraulic fluid temperature range - C +7 C (-1 F +18 F) Viscosity range Minimum fluid cleanliness Cleanliness class to ISO 446 : mm /s (cst), recommended...1 mm /s (cst) class 18/16/1 Electrical characteristics Supply voltage 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 Switching time Relative duty cycle Protection class to ISO 6 / EN 6 9 Electrical connection 1 V DC, 4 V DC 1 V = 14 ma, 4 V = 76 ma 1 V =.8 / 4 V =.9 1 V = 9.1 / 4 V =.7 Hz 6 % I N 6 % I N < % I N < % p N see performance graphs 1 % IP 6 / IP 67 / IP 69K, see Ordering code (with appropriate mating connector and proper fitting and sealing) -pin square plug to ISO 44 / DIN 4 6 (standard) for other connectors, see Ordering code / 4-P-911-EN-/.17

3 4 Performance graphs measured with oil viscosity mm /s (cst) p = f (I) Pressure adjustment characteristic p [bar (psi)] 8 ( 11) P49.ai 6 (86) p N 7 bar (1 psi) 4 (7) (8) p N 4 bar (64 psi) I [ma] p = f (Q) Pressure - Flow rate characteristic p [bar (psi)] 1 P4.ai p N = 7 bar p [bar (psi)] (17) 9 (1) p 1 = bar (6 psi) 6 (86) (4) 1 7,., 7, 1 1, 1 (.6) (1.9) (1.) (.6) (.6) (1.) (1.9) (.6) (.) (4) Q [l/min (gpm)] p = f (Q) Pressure - Flow rate characteristic p [bar (psi)] 8 P41.ai p N = 4 bar p [bar (psi)] (11) 6 4 p 1 = bar (6 psi) (86) (7) (8) 1 (.6) 7, (1.9) (1.). (.6). 7, 1 1, 1 (.6) (1.) (1.9) (.6) (.) (4) Q [l/min (gpm)] 4-P-911-EN-/.17 /

4 Dimensions & sectional view /4 16UNF Ø M A = 4 [Nm] ± 1 % ( ft lbs ± 1 %) M A =.7 [Nm] ± 1 % ( ft lbs± 1 %) 6 Installation information IMPORTANT! When fitting the cartridges, note the mounting attitude (preferably vertical, with coil down automatic air bleed) and use the specified tightening torque. No adjustments are necessary, since the cartridges are set in the factory. Seal kit NBR no. DS-47-N 1) Item Qty. Description 1 1 O-ring 18, x, FKM 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! 1) Seal kit with FKM (Viton) seals no. DS-47-V 1 O-ring no ,17 x 1,78 N9 1 O-ring no. 14 1,4 x 1,78 N9 4 1 O-ring no. 1 1,8 x 1,78 N9 O-ring 16, x, FKM 6 Backup ring 1.7 x 1.4 x 1.4 FI71 7 Backup ring 9.4 x 1.4 x 1. FI71 4/ 4-P-911-EN-/.17

5 7 Ordering code Ex. DRD S A - 7 M _ D _ DRD = direct acting, prop. pressure-reducing cartridge S = standard solenoid (proportional) A... Q = standard model - see relevant data sheets Z... R = special features - please consult BUCHER 7 = -way pressure function (external pilot drain) M = cavity type AM 7 = pressure range 7 bar (1 psi) 4 = pressure range 4 bar (64 psi) = nominal size (blank) = NBR (Nitrile) seals (standard) V = FKM (Viton) seals (special seals - please contact BUCHER) = design stage (omit when ordering new units)... = voltage e.g. 4 (4 V) D = current DC (blank) = ISO 44 / DIN 4 6 connection with mating plug (standard, IP 6) M1 = ISO 44 / DIN 4 6 connection without mating plug C = Kostal plug connection (IP 6) JT = Junior Timer radial plug connection (with protection diode, IP6) IT = Junior Timer axial plug connection (with protection diode, IP6) D = Deutsch plug connection DT4-P (IP 67/69K) mating plug not supplied DT = Deutsch plug connection DT4-P (with protection diode, IP 67/69K) S = AMP Superseal 1. (IP67) / Metri-Pack 1 (IP6) plug connection F = flying leads ( mm) 8 Related data sheets Reference (Old no.) Description 4-P-411 (i-) The form-tool hire programme 4-P-4181 (i-.11) Cavity type AM 4-P-111 (W-.141) Coils for screw-in cartridge valves 4-P-111 Amplifier unit for proportional valves (1-channel) PBS - A 4-P-1111 Amplifier card for proportional valves (1-channel) SAN- 4-P-7111 (G-4.) Line-mounting body, type GAMA (G /8 ) info.ch@bucherhydraulics.com 17 by Bucher Hydraulics AG Frutigen, CH-714 Frutigen 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-911-EN-/.17 /