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DVs series

DVs series
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Proportional Pressure-Relief Cartridge Valve, Size 1 Qmax = 1.5 l/min, pmax = 420 bar Pilot valve, seated design, direct acting Series DVSA-1L... • Can be used as a pilot valve • Compact construction for cavity type AL - 3/4-16 UNF • Operated by a proportional solenoid • In a power failure, the pressure setting drops to the minimum value • 5 pressure ranges available • 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 1 Description These proportional pressure-relief cartridges, series DVSA-1L..., are size 1 pilot valves featuring a seat-valve design and a 3/4-16 UNF mounting thread. With these pressure-relief cartridges, the relief pressure is dependent on the electrical control signal and can be continuously varied. When the solenoid is de-energised (initial position), connection 2 ^ 1 is open and the minimum pressure (free flow) depends on the flow rate. Any pressure at port 1 is additive to the valve setting at port 2, therefore port 1 should preferably be connected directly to tank. In control mode, the relief pressure is proportional to the change in the required value (amplifier output current). In order to obtain precise pressure settings over the whole of the required pressure range 2 Symbol (optimum resolution), the pressure relief cartridges are available in five pressure levels. These proportional pressure-relief cartridges are primarily used as pilot valves, mainly in mobile and industrial applications to allow a pressure in hydraulic installations to be limited electro-propor-tionally. All external parts of the cartridge are zinc-nickel plated to DIN 50 979 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 360°. If you intend to manufacture your own cavities or are designing a line-mounting installation, please refer to the section “Related data sheets”.

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Performance graphs measured with oil viscosity 33 mm2/s (cSt) p = f (I) Pressure-adjustment characteristic (at Q = 0.3 l/min) p = f (I) Pressure-adjustment characteristic (at Q = 0.3 l/min) Pressure v. Flow rate characteristic pN = 40 bar Pressure v. Flow rate characteristic pN = 100 bar Pressure v. Flow rate characteristic pN = 160 bar Pressure v. Flow rate characteristic pN = 250 bar Pressure v. Flow rate characteristic pN = 350 bar

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|0j= IMPORTANT! To achieve the proportional pressure-relief cartridge's maximum performance rating, fit the solenoid coil as shown (with the plug pins at the bottom). 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. ATTENTION! To prevent any pressure surges, port 1 must be routed to tank with the least possible back-pressure. Any tank pressure acting at port 1 is additive to the pressure setting at the main...

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pressure-relief cartridge, pilot valve standard solenoid (proportional) standard model - see relevant data sheets special features - please consult BUCHER pressure function 1 (pressure-relief) cavity type AL pressure range ...350 bar pressure range .250 bar pressure range .160 bar pressure range .100 bar pressure range . 40 bar nominal size 1 (primarily for pilot controls) NBR (Nitrile) seals (standard) FKM (Viton) seals (special seals - please contact BUCHER) design stage (omit when ordering new units) voltage e.g. 24 (24 V) current DC ISO 4400 / DIN 43 650 mating plug (standard, IP 65)...

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