Electric Proportional Pressure Reducing Valves Series ERP 03.ERP

Transcription

1 Electric roportional ressure Reducing Valves Series ER 03.ER

2 Electric proportional pressure reducing valves SERIES ER Index of content: Description and main features: age 3 echnical data: age 4 Dimensional data, valves type A: age 4 Dimensional data, sub-plates: age 5 Dimensional data, valves type B: age 6 Dimensional data, valves type B: age 7 Ordering key: age 2

3 Electric proportional pressure reducing valves SERIES ER Description: he Fluidea ER electro-hydraulic proportional pressure reducing valves are used as a remote pilot stage of services that require a variable and smooth adjustment of the servosystem control. hey are typically utilized to control both open and closed centre directional valves, proportional valves, servo systems of variable displacement pumps and motors, clamp cylinders, hydraulic clutches and braking systems. hese are applications where the efforts required for a direct manual control of the services would be too high, or where it would be unpractical to use mechanical linkages due to the displacement of the components. he valves are hydraulically fed with a primary inlet pressure that is reduced and adjusted to the desired value of the secondary output pressure, which varies in a linear and proportional mode with the variation of the electric signal that feed the magnet. he electric signal is a WM pulsing current format which is remotely activated with a manually operated potentiometer. An electronic card is interposed, acting as a converter/amplifier and it can be set up at the required parameters through trimmers or via a C with a dedicated software. Fig. 1 diagram shows a typical metering curve of the secondary output pressure (from 0 up to 22 bar) as a function of the electric control signal (from 0 up to 750 a supply voltage of 24 V-DC) and a primary pressure value of 25 bar. he flow signal that generates the primary pressure can either be taken from a dedicated auxiliary pump or derived from the main hydraulic system through a pressure reducing valve. he secondary pressure is independent from the primary one as far as this is equal to the maximum output pressure required plus the pressure drop of the system. A relatively small drain flow, conforming with the design data, is diverted direct to the tank. An overload s compensation mechanism is released when the secondary pressure raises above the value set up by the remote potentiometer, therefore the pressure reducing valve in some way is acting also as a relief valve limiting the output pressure. With relatively low values of pressure and flow the energy consumption of the full servosystem is minimum. he range of Fluidea ER electric proportional pressure reducing valves includes 2 versions: type A rated at high pressure up to 350 bar and type B rated at low pressure up to 30 bar, both available in single (1 magnet) and double acting (2 magnets) configuration an in single or multiple design options. Features: Fig. 1 ressure reducing over the whole range independent of the supply pressure. Wide range of output pressure metering curves from 12 up to 350 bar Non symmetrical metering curves options available for double acting version Oil immersed proportional solenoids option (Valve type A) for longer life Explosion proof solenoid option (Valve type A) EEx m II 4 and military, I67 Adjustable valve response time (Valve type A) Single or multiple combinations In line or manifold mounting options Choice of various sub-plates in single and multiple configuration Conversion plates to ISO/CEO mounting standards 3

4 Electric proportional pressure reducing valves SERIES ER echnical data: Maximum inlet pressure: 350 bar at port Max. backpressure: 5 bar at port Metering curves (port A & B): 0-12 bar, 0-30 bar, 0-70 bar, bar bar, bar Supply flow: 6 32 cst and Δp = 30 bar Viscosity range: 2, - 30 cst Fluid cleanliness class: NAS Ambient temperature range: From -35 C up to +0 C Mounting position: Any Hydraulic fluids: Hydraulic mineral oils Mounting surface roughness: N6 (0, μm) ISO 46 & ISO Mounting surface flatness: 0,01 mm over 100 mm distance ISO Supply voltage: 12 or 24 V DC Nominal supply current: VDC, VDC Valve response time: Adjustable from ± 0,0 to 10 sec Hysteresis band: < 3% (with dither ) Resolution: < 0,5% (with dither ) Operation: 100% continuous Seals material: BUNA-N standard, Viton optional Recommended dither frequency: 100 Hz Dimensional data (Valve type A): Valve type A single acting Valve type A double acting ,9 Nm ,5 133,5 60 9, O 9,4 (4 OS.) ,5 9, , ,5 O 9,4 (4 OS.) solenoid a solenoid a solenoid b Nm M5 - (4 OS.) O 5,4 (4 OS.) O 5,4 (4 OS.) B A B 4

5 Electric proportional pressure reducing valves SERIES ER Dimensional data sub-plates (Valve type A) S sub-plates option, fitted with BS threaded ports M6 (4-6 OS.) ROF c b A1 A2 A3 A4 A5 A6 1, B1 B2 B3 B4 B5 B6 27, ,5 a 4,5 4,5 1, art No. a b c orts, A, B, S ¼ BS S ¼ BS S ¼ BS S ¼ BS S ¼ BS S ¼ BS SC sub-plate option, ISO/CEO mounting standard O 5 (4 OS.) O 9 (4 OS.) 49 A B Sub-plates can only be fitted on A type valves and they have to be ordered separately specifying the part number above for S design and just the qty for SC design 5

6 Electric proportional pressure reducing valves SERIES ER Dimensional data (Valve type B non stackable): Valve type B single acting U O 6,2 (2 OS.) 10 O 11 (2 OS.) U Valve type B double acting 42 41,5 3 U1 U2 O U1 U

7 Electric proportional pressure reducing valves SERIES ER Dimensional data (Valve type B stackable): Double acting valves only are stackable, up to a maximum of 6 sections Valve type B double acting 42 79,5 3 U1 U2 3 U3 U4 O U1 U2 U3 U4 7

8 Electric proportional pressure reducing valves SERIES ER Ordering key: ER A D N Supply voltage: - 12 = 12 Volt DC - 24 = 24 Volt DC Output pressure metering curve (ort B): o be omitted for single acting configuration = 0-12 bar (Valves type A & B) = 0-22 bar (Valves type A & B) = 0-30 bar (Valves type A & B) = 0-70 bar (Valve type A) = bar (Valve type A) = bar (Valve type A) = bar (Valve type A) Output pressure metering curve (ort A): = 0-12 bar (Valves type A & B) = 0-22 bar (Valves type A & B) = 0-30 bar (Valves type A & B) = 0-70 bar (Valve type A) = bar (Valve type A) = bar (Valve type A) = bar (Valve type A) Number of sections: - N1 = non stackable design - S* = stackable design (asterisk to be replaced with the number of sections required up to a maximum of 6) Valve configuration: - S = Single acting valve (1 solenoid) - D = Double acting valve (1 solenoids) ressure rating: A = High pressure valve (0-350 bar) B = Low pressure valve (0-30 bar) Design series: - ER = Electric pressure reducing valve

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