2/2 Cartridge Seat Valve, Size 5

Transcription

1 / Cartridge Seat Valve, Size Q max = l/min, p max = bar Digital valve, bidirectional seat-valve shut-off, direct acting Series WSGD / WSOD For use in digital hydraulics With bidirectional seat-valve shut-off Compact construction for cavity type ALM Mx. High switching performance Short response times 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 These direct acting / solenoid operated directional seat valves, series WSGD / WSOD, are screw in cartridges with a Mx. or / 6 UNF mounting thread. They are designed on the poppet/seat principle, and are therefore virtually leak free in both directions of flow (bidirectional seat valve shut off). Over excitation, preferably through an electronic switching device (booster), is required to operate the solenoid. Combined with the low mass of the moving parts, this results in short response times and high switching performance in a compact package. "De energised closed" and "de energised open" functions are available. The straightforward design delivers an outstanding price/performance ratio. The valves are used in applications in digital hydraulics, where fast response and long life with minimum size are vitally important. All external parts of the cartridge are zinc-nickel plated to DIN 979 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. Symbol WSGD WSOD Technical data General characteristics Designation Design Mounting method Tightening torque / cartridge seat valve digital valve, bidirectional seat-valve shut-off, direct acting poppet/seat design (pressure balanced) screw-in cartridge Mx. or /-6 UNF Nm ± % Size nominal size, cavity type ALM Mx. cavity type AL /-6 UNF please contact BUCHER Weight. kg Reference: -P--EN- Issue: 9. /6

2 General characteristics Mounting attitude Ambient temperature range unrestricted - C +8 C Hydraulic characteristics Maximum operating pressure (ports and ) Maximum flow rate Flow direction bar l/min /, see symbols Hydraulic fluid HL and HLP mineral oil to DIN ; for other fluids, please contact BUCHER Hydraulic fluid temperature range Viscosity range Minimum fluid cleanliness Cleanliness class to ISO 6 : C +8 C mm /s (cst), recommended... mm /s (cst) class /8/ Electrical characteristics Excitation voltage Length of over-excitation Supply voltage Voltage tolerance Nominal power consumption Switching time - model WSG - model WSO 8 V DC (standard) ms Relative duty cycle - static % V DC (standard) ± % (at ambient temperature < 6 C : ± %) W at V DC 6 ms (energising) ms (deenergising) 6 ms (energising) ms (deenergising) Duty cycle / switching frequency - dynamic see characteristics Protection class to ISO 6 / EN 6 9 IP 6 Electrical connection: - PIN - PIN - PIN These times are strongly influenced by fluid pressure, flow rate and viscosity, as well as by the dwell time under pressure. -pin plug M8x 8 / V DC V not used /6 -P--EN-/9. Series WSGD / WSOD

3 Performance graphs measured with oil viscosity mm /s (cst), coil at steady-state temperature and % undervoltage p = f (Q) Performance limits [WS GD ] P.ai p = f (Q) Performance limits [WS OD ] P.ai Q [l/min] Q [l/min] p = f (Q) Pressure drop - Flow rate characteristic [WS GD ] P8.ai p = f (Q) Pressure drop - Flow rate characteristic [WS OD ] P9.ai Q [l/min] Q [l/min] ED = f (f) duty cycle - switching frequency - characteristic [at steady-state coil temperature] ED [%] Einschaltdauer / Zyklusdauer [%] duty cycle / cycle time [%] 8 6 P.ai max. ED Umgebungstemperatur 8 C ambient temperatur 8 C Umgebungstemperatur 6 C ambient temperatur 6 C min. ED 6 f [Hz] P6.ai U + Boostspannung boost voltage Haltespannung holding voltage Induktions spannung induction voltage U ms t on tcycle ms ED [%] = t on t cycle x -P--EN-/9. Series WSGD / WSOD /6

4 Dimensions & sectional view. Normally closed design WSGD Ø6 (+) (not used) (nicht belegt) M A = [Nm]±% /-6UNF (-) 9 M A = [Nm]±% Mx, with /-6 UNF thread cavity type AL please contact BUCHER with Mx. thread cavity type ALM. Normally open design WSOD Ø6 (+) (not used) (nicht belegt) with /-6 UNF thread cavity type AL please contact BUCHER 9 /-6UNF M A = [Nm]±% with Mx. thread cavity type ALM (-) 9 M A = [Nm]±% Mx, /6 -P--EN-/9. Series WSGD / WSOD

5 6 Installation information IMPORTANT! When fitting the cartridges, use the specified tightening torque. No adjustments are necessary, since the cartridges are set in the factory. 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. ATTENTION! If an orifice is fitted directly in port close to the valve, and if the flow direction is from to, it is important to ensure that the axis of the orifice drilling is offset from the valve axis by at least mm! min. /-6 UNF A NBR seal kit no. DS--N ) Item Qty. Description O-ring no. 7 7,7 x,78 N9 O-ring no., x,78 N9 O-ring. x. Viton Backup ring.7 x, x, FI7 IMPORTANT! ) Seal kit with FKM (Viton) seals, no. DS--V Mx. Z - NBR seal kit no. DS-6-N ) Item Qty. Description O-ring no. 7 7,7 x,78 N9 O-ring no.,8 x,78 N9 O-ring. x. Viton Backup ring 9.9 x, x, FI7 IMPORTANT! ) Seal kit with FKM (Viton) seals, no. DS-6-V 7 Ordering code Ex. W S G D Z _ - D _ W = directional valve S = seat valve, direct acting G = / function, de-energised closed O = / function, de-energised open D = digital valve Z = special features - with Mx. thread (standard) A = standard model - with / - 6 UNF thread (please contact Bucher) = nominal size (blank) = NBR (Nitrile) seals (standard) V = FKM (Viton) seals (special seals - please contact BUCHER)... 9 = design stage (omit when ordering new units)... = voltage e.g. ( V) D = current DC (blank) = M8x male connector (standard) F = for flying leads ( mm), please contact Bucher -P--EN-/9. Series WSGD / WSOD /6

6 8 Related data sheets Reference (Old no.) Description -P- (i-) The form-tool hire programme -P-7 (i-.) Cavity type AL -P- (i-.) Cavity type ALM -P-7 (G-.) Line-mounting body, type GALA (G /8 ) -P-7 (G-.) Line-mounting body, type GALMA (M x.) info.ch@bucherhydraulics.com 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: /6 -P--EN-/9. Series WSGD / WSOD