3/2 Solenoid Cartridge Valve, Size 6

Transcription

1 / Solenoid Cartridge Valve, Size 6 Q max = l/min, p max = 5 bar Bidirectional seat-valve shut-off, direct acting Guided valve spool and poppet Two spool variants are available Available in two mounting versions With or without manual override Hand lever can be fitted on solenoid 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 Can be fitted in a line-mounting body Description The WD / WF series of / solenoid operated directional seat valves are size 6, direct acting, pressure balanced, push-in cartridges. IIn the normal condition (de-energised), flow in port is shut off without leakage. The core element operates on the tried and tested principle of the guided poppet, and the guide spool has a seal. Two different mounting versions are available, which allows the designer to choose the insertion depth (flange. mm or 8 mm). The overlapped spool model (WF ) features a closed crossover characteristic i.e. during the valve's switching period, there is no connection between ports,, and and therefore only a minimal loss of flow / pressure occurs. These cartridge seat valves are also available with or without manual override, and with the option of an additional hand lever. These valves are predominantly used in certain mobile and industrial applications where leak-tight shut-off functions are crucially important. Examples are where loads, tensions, or clamping forces must be held without leakage. All external parts of the cartridge are zincnickel plated to DIN and are thus suitable for use in the harshest operating environments. The slip-on coils can be replaced without opening the hydraulic envelope and can be positioned at any angle through 6. If you intend to manufacture your own cavities or are designing a linemounting installation, please refer to the section Related data sheets. Symbol Technical data General characteristics Designation Design / solenoid cartridge valve bidirectional seat-valve shut-off, direct acting poppet and valve-spool design (pressure balanced) with underlapped or overlapped spool Mounting method push-in cartridge, mounting bolts M5 x Tightening torque 5.5 Nm.5 Size Weight Mounting attitude Ambient temperature range size 6, cavity type AC or cavity type AD.86 kg unrestricted -5 C +5 C Reference: -P-5-EN- Issue: 9.5 /5

2 Hydraulic characteristics Maximum operating pressure Maximum flow rate Flow direction 5 bar l/min l/min (series WF, with overlapped spool) see symbols Hydraulic fluid HL and HLP mineral oil to DIN 5 5; for other fluids, please contact BUCHER Hydraulic fluid temperature range Viscosity range Minimum fluid cleanliness Cleanliness class to ISO 6 : C +8 C 5 mm /s (cst), recommended mm /s (cst) class /8/5 Electrical characteristics Supply voltage Supply voltage tolerance V DC, V DC 5 V AC, V AC (5 6 Hz) others by consultation ± 5 % Nominal power consumption max. 8 W ( V DC = W) Switching time Flow direction 8 ms (energising) 6 ms (deenergising) Flow direction 6 5 ms (energising) ms (deenergising) These times are strongly influenced by fluid pressure, flow rate and viscosity, as well as by the dwell time under pressure. Relative duty cycle Protection class to ISO 65 / EN 6 59 % IP 65 (when connector plugs are properly fitted) Electrical connection -pin square plug to DIN EN 75-8 Performance graphs measured with oil viscosity mm /s (cst), coil at steady-state temperature and % undervoltage p = f (Q) Performance limits p [bar] 5 P.ai p = f (Q) Pressure drop - Flow rate characteristic p [bar] P.ai 5 5 WF... WD WF Q [l/min] 5 5 Q [l/min] /5 -P-5-EN-/9.5

3 5 Dimensions & sectional view 5. Shallow insertion model 5. Deep insertion model (shown here without manual override) Ma =.7 ±. [Nm] ) Ø M5 Ma = 5.5 ±.5 [Nm] ). ) ) Can be chosen with or without manual override. (see ordering code) Seal kit no. DS-95-N Item Qty. ) Qty. ) Description O-ring no. 5, x,78 N9 O-ring no. 6 5,6 x,78 N O-ring no. 6 8,7 x,6 N O-ring no.,5 x,78 N9 O-ring no. 9,5 x,78 N7 ) WDB / WFB / WDD / WFD (Shallow insertion model) ) WDC / WFC / WDE / WFE (Deep insertion model) -P-5-EN-/9.5 /5

4 6 Functional principle / Spool variants Underlapped spool (standard, WD ) Overlapped spool (WF ) 7 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. The overlapped spool model features a closed crossover characteristic i.e. during the valve's switching period, there is no connection between ports,, and and therefore only a minimal loss of flow/pressure occurs. This is a very important benefit in small-volume circuits, and in accumulator- and clamping systems. When fitting the cartridges, use the specified tightening torque for the mounting screws. No adjustments are necessary, since the cartridges are set in the factory. 8 Hand lever fitted on solenoid (optional) As an option, the WD / WF series of / solenoid operated directional seat valves are available with an additional hand lever. Two models can be supplied; the HHB hand lever with detent feature, and the HHNB hand lever without detent feature. Hand levers can only be fitted to valves that have a manual override. 6.9 Ø ) 6.9 Ø 5 ) Operated position /5 -P-5-EN-/9.5

5 9 Ordering code Ex. W D B A _ VDC + HHB _ W D F = directional seat valve, de-energised closed = standard spool, / function, solenoid operated = overlapped spool, / function, solenoid operated Nitrile seals Viton seals Mounting depth (Cavity types AC and AD) B G shallow = with manual override (not available with line-mounting body) C H deep = with manual override (with or without line-mounting body) D I shallow = without manual override (not available with line-mounting body) E K deep = without manual override (with or without line-mounting body) A... Q = standard model - see relevant data sheets Z... R = special features - please consult BUCHER... 9 = design number, seat vlave (omit when ordering new units)... = voltage e.g. ( V) without = without hand lever (standard) + HHB = with hand lever with detent + HHNB = with hand lever without detent... 9 = design number, hand lever (omit when ordering new units) Related data sheets Reference (Old no.) Description -P- (i-) Orifice flow chart -P- (i-) The form-tool hire programme -P- (i-.) Cavity type AC and AD -P-7 (G-.) Line-mounting body, type GADA (G /8 ) info.ch@bucherhydraulics.com 5 by Bucher Hydraulics AG Frutigen, CH-7 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: (W-.) -P-5-EN-/9.5 5/5