4
NOTES
4.1 Options
/A = Solenoid mounted at side of port A of main body (only for single solenoid valves).
In standard version, solenoid is mounted at side of port B.
/D = Internal drain (standard configuration is external drain)
/E = External pilot pressure (standard configuration is internal pilot pressure).
/S = Main spool stroke adjustment.
/WP = Prolonged manual override protected by rubber cap.
The manual override operation can be possible only if the pressure at T port is lower
than 50 bar
Devices for main spool switching control and to reduce the hydraulic shocks at the
valve operation
/H = Adjustable chokes (meter-out to the pilot chambers of the main valve).
/L9 = plug with calibrated restictor in P port of pilot valve - see section
Suggested for pilot pressure higher than 210 bar or to limit the hydraulics shocks caused by the fast main spool switching
4.2 Special shaped spools
- spools type 0 and 3 are also available as 0/1 and 3/1 with restricted oil passages in central position, from user ports to tank.
- spools type 1, 4 are also available as 1/1 and 4/8 that are properly shaped to reduce water-hammer shocks during the switching (to use with option /L*).
9
3
MAIN CHARACTERISTICS, SEALS AND HYDRAULIC FLUID - for other fluids not included in below table, consult our technical office
3.1 Coils characteristics
FUNCTIONAL SCHEME (config. 71)
example of switching control options
option L9
option H
Mineral oils
Hydraulic fluid
NBR, FKM, HNBR
FKM
NBR, HNBR
DIN 51524
ISO 12922
HL, HLP, HLPD, HVLP, HVLPD
HFDU, HFDR
HFC
Suitable seals type
Classification Ref. Standard
Flame resistant without water
Flame resistant with water
NBR seals (standard) = -20°C ÷ +80°C, with HFC hydraulic fluids = -20°C ÷ +50°C
Seals, recommended fluid temperature FKM seals (/PE option)= -20°C ÷ +80°C
HNBR seals (/BT option)= -40°C ÷ +60°C, with HFC hydraulic fluids = -40°C ÷ +50°C
Recommended viscosity 15÷100 mm
2
/s - max allowed range 2.8 ÷ 500 mm
2
/s
Fluid contamination class
ISO 4406 class 21/19/16 NAS 1638 class 10, achievable with in line filters - 25 μm (β10 _> 75 recommended)
Operating pressure
Assembly position / location
Subplate surface finishing Roughness index Ra 0,4 - flatness ratio 0,01/100 (ISO 1101)
MTTFd values according to EN ISO 13849 75 years, for further details see technical table P007
Flow direction As shown in the symbols of table 2
Rated flow See diagrams Q/Δp at section
6
Maximum flow
Ambient temperature Standard = -30°C ÷ +70°C; /PE option = -20°C ÷ +70°C; /BT option = -40°C ÷ +70°C
P, A, B, X = 350 bar
T = 250 bar for external drain (standard)
T with internal drain (option /D) and port Y = 210 bar SDPHE (DC); 160 bar SDPHE (AC)
Minimum pilot pressure = 8 bar
Any position for all valves except for type -*70 (without springs) that must be installed with hori-
zontal axis if operated by impulses.
Insulation class H (180°C) for DC coils F (155°C) for AC coils
Due to the occuring surface temperatures of the solenoid coils, the European standards
EN ISO 13732-1 and EN ISO 4413 must be taken into account
Protection degree to DIN EN 60529 IP 65 (with connectors 666, 667 or 669 correctly assembled)
Relative duty factor 100%
Supply voltage and frequency See electric features 5
Supply voltage tolerance ± 10%
Certification
CURUS North American standard
Shaped spool availability
0/1 3/1 1/1 4/8
SDPHE-2, SDPHE-4 • • • •
SDPHE-6 - • • •
SDPHE-2: 300 l/min; SDPHE-4: 700 l/min; SDPHE-6: 1000 l/min
(
see rated flow at section
6
and operating limits at section
7
)