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PRM8-06

Product catalog summary

Functional Description: The proportional directional control valve is composed of a cast-iron body, main spool, control spool, auxiliary centring springs, main return springs, and proportional solenoids. The main spool valve is pilot-controlled and mirrors the control spool position, which is determined by the solenoid's control current. The central position is maintained by auxiliary centring springs. Solenoids require an external power source with current feedback, and optimal performance is achieved with additional dither signals from external electronics. The valve operates across a full range of input pressures, ensuring continuous flow-rate characteristics and minimal hysteresis. It offers improved output parameters compared to direct-controlled valves and maintains a monotone increasing relationship between pressure gradient and flow rate with constant control current. Proper function requires supply pressure in the 'P' channel to be higher than in the 'T' channel. The valve housing is phosphate-coated, and solenoids are zinc-coated.

Specifications: The valve has a nominal size of 06, with a maximum operating pressure of 350 bar (5076 PSI) at ports P, A, B, and 210 bar (3046 PSI) at port T. It supports a maximum flow of 140 l/min (37 GPM) at 320 bar (4641 PSI). The hydraulic fluid should be of power classes HL, HLP to DIN 51524, with a fluid temperature range of -30 to +80°C (-22 to +176°F) for NBR and -20 to +80°C (-4 to +176°F) for Viton. The ambient temperature should not exceed +50°C (+122°F), and the viscosity range is 20 to 400 mm²/s (98 to 1840 SUS). The maximum fluid contamination is Class 21/18/15 according to ISO 4406. The nominal flow rate at a pressure drop of 10 bar (145 PSI) is 25 l/min (6.60 GPM), with hysteresis ≤ 6%. The valve weighs 2.4 kg (5.29 lbs) and can be mounted in any position, preferably horizontal. It has an enclosure type of EN 60 529 IP 65.

Technical Data of the Proportional Solenoid: The solenoid coil types include E1, E2, E3A, E4A, E12, and E13, with nominal supply voltages of 12 V DC and 24 V DC. The limit current is 2.5 A for 12 V and 1.6 A for 24 V, with resistances at 20°C (68°F) of 2.3 W and 5.2 W, respectively. The electronics have a nominal supply voltage of 12 V DC or 24 V DC, with a supply voltage range of 11.2 to 14.7 V or 20 to 30 V DC. The maximum output current is 2.4 A for R < 4 W and 1.5 A for R < 10 W. Ramp adjustment ranges from 0.05 to 3 seconds, with dither frequencies of 90/60 Hz and amplitudes of 0 to 30%.

Spare Parts: Spare parts include solenoid coils, seal kits, connector plugs, bolt kits, and nut + seal rings. Specific ordering numbers are provided for each component, with details on dimensions and types.

Installation and Maintenance: The valve's installation dimensions conform to DIN 24 340 / ISO 4401 / CETOP RP121-H standards. Mounting bolts M5 x 45 DIN 912-10.9 or studs must be ordered separately, with a tightening torque of 8.9 Nm (6.6 ft-lbs). The packing foil is recyclable, and the protective plate can be returned to the manufacturer. Technical information is for descriptive purposes and not a guaranteed representation of product properties.

Catalog excerpts

Proportional Directional Control Valves Dn 06 • pmax 350 bar (5076 PSI) • Qmax 140 l/min (37 GPM) Continuous control of both flow rate directions High reliability Indirect control concept with a floating spool High parameters of controlled flow rates Installation dimensions to DIN 24 340 / ISO 4401 / CETOP RP121-H Functional Description The proportional directional control valve consists of a cast-iron body (1), main spool (2), control spool (3), two auxiliary centring springs (4), two main return springs (5) and two proportional solenoids (6). The pilot controlled main spool valve copies the control spool position, which is given the control current of the solenoid. The central position of the main spool is defined by the auxiliary centring springs. The solenoids are supplied from an external source, which should be provided with a current feedback. In order to achieve optimum operating parameters the external elektronics should be able to generate an additional dither - signal.The proportional valve can be used within the whole range of input pressure, where within the required continuity of the flow-rate characteristics and minimum hysteresis is achieved. The selected concept increases the achieved output parameters of the proportional valve in comparison to direct controlled proporcional valve. Further on the valve shows a monotone increasing relation between pressure gradient and flow rate by constant control current. Proper functions of the valve are guaranteed only, if the supply pressure in the “P” channel is present; this pressure must be always higher than the pressure in the “T” channel. The basic surface treatment of the valve housing is phosphate coated and the operating solenids are zinc coated.

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Proportional Directional Control Valve Seals Nominal size 3Z11 Type of solenoid coil and Electronics Nominal flow rate at Dp = 10 bar Nominal supply voltage 12 V DC 24 V DC - Type of solenoid coil Connector EN 175301-803-A Connector EN 175301-803-A with quenching diode Axial connector AMP Junior Timer (2 pins; male) Axial connector AMP Junior Timer with quenching diode Connector Deutsch DT04-2P (2 pins; male) Connector Deutsch DT04-2P with quenching diode Other coils on demand see catalog HA 8007. Electronics for controlling proportional valves is possible to order separately, see catalog HA...

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Valve Dimensions Dimensions in millimeters (inches)

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Solenoid coil Seal kit Connector plug EN 175301-803-A Bolt kit Nut + seal ring Ordering number Nominal supply voltage [V] Ordering number Dimensions, number Ordering number 3. Connector plug EN 175301-803-A Type bez usměrňovače - M16x1,5 (otvor průchodky Æ 6-8 mm) Type designation 4. Bolt kit Dimensions, number Tightening torque Ordering number Seal ring Ordering number 5. Nut + seal ring Type of the nut Standard nut Caution ! The packing foil is recyclable. The protective plate can be returned to manufacturer. Mounting bolts M5 x 45 DIN 912-10.9 or studs must be ordered separately. Tightening...

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PRM8-06

PRM8-06

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