Electrically Operated Pressure Relief Cartridge, Size 1 Seated Design, Direct Acting Series WUVA 1LO...

Transcription

1 Electrically Operated Pressure Relief Cartridge, Size Seated Design, Direct Acting Series WUVA LO....5 l/min, 40 bar Wet armature solenoid with high pressure core tube and slip on coil Coils can be changed without opening the hydraulic envelope Coils with DIN, Deutsch, Kostal or Junior Timer plug connections can be supplied all external parts are chromited and are Cr VI free Suitable for pilot functions Can be fitted in a line mounting body. Description Series WUVA LO... cartridges are screw in, electrically operated pressure relief valves, nominal size mm. They are direct acting seat valves. The mounting thread is the 3/4" 6 UNF pattern. Their preferred application is as pilot control valves. Any pressure at port on the secondary pressure side is additive to the valve setting, therefore port should preferably be routed directly to tank. All external parts are chromited (Cr VI free) and the valves are thus suitable for use in the harshest operating environments. The cartridges can be fitted in the AL cavity and also in some 3/4" 6 UNF cavities from other valve manufacturers. For customers who manufacture their own manifold blocks, we offer form tool sets for sale or hire. The GALA body with G 3/8" port threads is available for pipe mounting applications.. Symbol 3. Main characteristics Designation pressure relief cartridge Design seat valve design, direct acting Mounting method screw in cartridge, 3/4" 6 UNF Size nominal size mm, cavity type AL Weight kg 0.45 Mounting attitude unrestricted Flow direction, see symbol Operating pressure range in port in port bar Pressure setting range bar pressure range 4 = pressure range 35 =... 3 pressure range 5 =... pressure range 6 = pressure range 0 =... pressure range 04 = Hydraulic fluid HL and HLP hydraulic oils to DIN 5 54; for other fluids, please consult BUCHER Fluid temperature range C Ambient temperature C Viscosity range mm /s (cst) recommended 5... Flow rate Q max. l/min.5, see performance graphs Replaces: D 6.0 /5 Classification: Reference: 400 P 870 E 0/09.07

2 Minimum fluid cleanliness level 0/8/5 to ISO 4406 : 999 Nominal voltages VAC VDC 5, 30, (...60 Hz), 4 Nominal voltage tolerance % ± 0 Nominal power consumption W VAC = 5, VDC = 7 Relative duty cycle % Protection class IP 65 / IP 67, see Ordering code" (when connector plugs are properly fitted) Electrical connection 3 pin square plug to DIN EN (standard) for other connectors, see Ordering code" 4. Performance graphs measured with oil viscosity 33 mm /s (cst) Type WUVA LO 4... Type WUVA LO ,3 0,6 0,9,,5 Type WUVA LO 5... Type WUVA LO Type WUVA LO 0... Type WUVA LO P 870 E 0/09.07 /5

3 5. Setting the pressures (pressure p must be set first, followed by pressure p) Setting the higher pressure p with pump running and solenoid energised:. Slacken cap nut item and remove it.. Slacken lock nut item () approx. / turn. 3. With pump running and solenoid energised, use the two flats (7 A/F) to turn adjusting screw item 9 until the required pressure is set in. 4. Hold the adjusting screw item 9 using the 7 A/F flats while tightening the lock nut item (). 5. Refit cap nut item and tighten it. Setting the lower pressure p (second relief setting, or vented pressure) with pump running and solenoid de energised:. Slacken cap nut item and remove it.. With pump running and solenoid de energised, use the adjusting screw item 0 (.5 A/F hex. socket) to set the pressure p in. (p min.:... 0 bar, dependent on flow rate). 3. Refit cap nut item and tighten it. When setting pressure p, do not over tighten the adjusting screw item 9 as this can destroy the stop ring that limits the maximum pressure setting. Stop turning as soon as a definite end stop can be felt. 7 A/F 9 Adjustment for the higher pressure p Hex. socket.5 A/F 0 Adjustment for the lower pressure p, and for emergency pressure setting if the power supply or coil fail E p (bar) Example showing the adjustable pressures p and p ( p p ) Time (t) D WUVPA... ( ON / OFF ) The relief pressure p is set as the higher working pressure (D) (solenoid energised) p is set as a low vented pressure (E) (solenoid is de energised) D = pressure p; as set with item 9, solenoid ON E = pressure p; can be set with item 0 to a maximum equal to D, solenoid OFF 400 P 870 E 0/ /5

4 6. Dimensions 0 PG , /4 6 UNF ø 3 A/F hex., tightening torque Ma = Nm, for fitting the cartridge. Line mounting body type GALA ø 5.8 Cavity type AL 7. Schematic section 3 PG 9 Seal kit no. DS 37, comprising: It. Qty. Description Size O ring no x.78 N90 O ring no x.78 N90 3 O ring 6.00 x.00 Viton 4 Backup ring 0.70 x.45 x.0 FI P 870 E 0/ /5

5 8. Installation and servicing All work must be carried out with care and by qualified personnel only. When fitting the cartridge, ensure that the seals are oiled or greased and use the specified tightening torque. When changing seals, oil or grease the new seals thoroughly before fitting them. 9. Ordering code Ex. WU V A L O 35 _ 4 VDC _ Electrically operated pressure relief valve Two stage A... Q = standard model see relevant data sheets Z... R = special features please consult BUCHER = pressure function (pressure relief) L = cavity type AL O = normally open 4 = pressure range bar 35 = pressure range... 3 bar 5 = pressure range... bar 6 = pressure range bar 0 = pressure range... bar 04 = pressure range bar = nominal size mm (blank) = Nitrile seals (standard) V = Viton seals (special seals consult Bucher)... 9 = design number (omit when ordering new units)... = voltage and current plainly specified (blank) = with mating plug to DIN EN (standard, IP 65) M = without mating DIN EN plug C = Kostal plug connection (IP 65) JT = Junior Timer radial plug connection (with quenching diode, IP65) IT = Junior Timer axial plug connection (with quenching diode, IP65) mating plug not supplied D = Deutsch plug connection DT04 P (IP 67) (optional connector styles) DT = Deutsch plug connection DT04 P (with quenching diode, IP 67) F = flying leads (0 mm) 0. Related data sheets Old no. New no. i P 0400 E The form tool hire programme i P 0407 E Cavity type AL W P 00 E Coils for screw in cartridge valves G P 700 E Line mounting body, type GALA (G 3/8") BUCHER HYDRAULICS Germany Phone Fax info.de@bucherhydraulics.com France Phone Fax info.fr@bucherhydraulics.com Netherlands Phone Fax info.nl@bucherhydraulics.com UK Phone Fax info.uk@bucherhydraulics.com USA Phone Fax info.wi@bucherhydraulics.com Switzerland Italy Austria China Product Center (Elevator) Phone Fax info.ch@bucherhydraulics.com Phone Fax info.it@bucherhydraulics.com Phone Fax Phone Fax info.bj@bucherhydraulics.com Phone Fax info.nh@bucherhydraulics.com We reserve the right of modification without notice. 400 P 870 E 0/ /5