Solenoid directional valves type DHAL8 and DHWL8 direct operated, ISO 4401 size 06, ex-proof or intrinsically safe, low leakage execution

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1 Table TEX5-/E Solenoid directional valves type DHL8 and DHWL8 direct operated, ISO 441 size 6, ex-proof or intrinsically safe, low leakage execution valve body spool ex-proof solenoid intrinsically safe solenoid electrical connector threaded connections for cable gland internal terminal board for cable connection manual override DHL8-6 DHWL8-6 On-off directional valves size 6 in low leakage execution, equipped with Ex certified solenoids, ideal for hydraulic systems assisted by accumulators operating in hazardous environments. They are equipped with spool diameter 8 mm accurately coupled to the body, granting very low internal leakages, see section 18 Valves models: DHL8: equipped with ex-proof solenoids, protection mode Ex-d, available with following certifications: Multicertification TEX, IEEx, E for gas group II and dust category 2, or Multicertification TEX and IEEx for gas group I (mining), or culus North merican certification for gas group &D DHWL8: equipped with intrinsically safe solenoids, protection mode Ex-ia (ib), certified TEX or IEEx for gas group II or group I (mining) Mounting surface: ISO 441 size 6 Max flow: DHL8 = 4 l/min DHWL8 = 2 l/min Max pressure: DHL8 = 35 bar DHWL8 = 25 bar 1 MODEL ODE OF EX-PROOF VERSION DHL8 / * /2 / GK / * 24D ** / * Solenoid valve, size 6, low leakage, ex-proof execution ertification type: Multicertification TEX, IEEx, E: - = omit for Group II M = Group I (mining) North merican ertification: UL = ULUS Series number Seals material, see section 9: - = NR PE = FKM T = HNR Valve size (ISO 441) = 6 Voltage code - see section 3 Valve configuration, see section 7 Spool type, see section 7 Solenoid threaded connection for cable gland fitting: GK = GK-1/2 ISO/UNI-6125 (tapered) - not for UL NPT = 1/2 NPT NSI 2.1 (tapered) M = M2x1,5 UNI-4535 (6H/6g) - not for UL Options: = solenoid at side of port (for single solenoid valves) O = horizontal cable entrance WP = prolongued manual override protected by metallic cap 2 MODEL ODE OF INTRINSILLY SFE VERSION DHWL8 / * /2 / * 6 ** / * Solenoid valve, size 6, low leakage, intrinsically safe execution ertification type: - = omit for TEX Group II M = TEX Group I (mining) IE = IEEx Group II IEM = IEEx Group I (Mining) Series number Seals material, see section 9: - = NR PE = FKM T = HNR onnector type DIN 4365, see section 11 Valve size (ISO 441) = 6 Valve configuration, see section 7 Spool type, see section 7 Options: = solenoid at side of port (for single solenoid valves) WP = prolongued manual override The manual override operation can be possible only if the pressure at T port is lower than 5 bar TEX5

2 3 EX-PROOF SOLENOIDS: MIN DT ertification Multicertification for Group II Multicertification for Group I ertification ULUS Type examination certificate (1) ESI 2 TEX 14 IEEx ES 1.1x ESI 3 TEX 57x IEEx ES 12.7x (1) The type examinator certificates can be downloaded from catalog on line, technical information section (2) For alternating current supply a rectifier bridge is provided built-in the solenoid E3661 replacing VPT-E Solenoid code O OM O/UL Method of protection Voltage code VD ±1% 12D, 24D, 28D, 48D, 11D, 125D, 22D Ex d 12D, 24D, 11D, 125D, 22D Voltage code V 5/6 Hz ±1% 12, 24, 11-12, (2) Power consumption 8W 12W oil insulation lass H Protection degree IP66/67 according to IE 144 IP 67 ccording to IE 144 Duty factor 1% Mechanical construction able entrance and electrical wiring Flame proof housing classified Ex d, according to EN 679-: 26, EN 679-1: 27 Flame proof housing classified according to UL 123 and UL429, S 22.2 n and S 22.2 n Internal terminal board for cable connection threaded connection for cable entrance vertical (standard) or Horizontal (option /O) 3.1 Multicertification Multicertification for solenoids group II for surface plants with gas, vapours and dust environment TEX Ex II 2G Ex d II T6/T4 Gb Ex II 2D Ex tb III T85 /T135 Db IEEx worldwide recognized certification Ex d II T6/T4 Gb Ex tb III T85 /T135 Db E Eursian ertification Ex II 2G Exd II T6/T4 Multicertification for solenoids group I for surface, tunnels or mining plants TEX: Ex I M2 Ex db I Mb IEEx: Ex db I Mb 4 EX-PROOF SOLENOIDS: TEMPERTURE DT ertification Multicertification for Group II Multicertification for Group I ertification ULUS Temperature class T6 T4 - T6 T5 Surface temperature mbient temperature (3) (3) The solenoids Group II and ULUS are certified for minimum ambient temperature -4. In case the complete valve must withstand with minimum ambient temperature of -4, select /T in the model code WRNING: service work provided on the valve by the end users or not qualified personnel invalidates the certification 4.1 UL certification lass I = Equipment for famable gas and vapours Division 1 = Possibility of explosive atmosphere during normal functioning Groups &D = tmosphere containing flamable gas Groups II&II = Gas group T6/T5 = Temperature class of solenoid surface referred to +55 / +7 ambient temperature 5 INTRINSILLY SFE SOLENOIDS: MIN DT Group II TEX OW-18/6 Solenoid Group I TEX (mining) OWM-18/6 code Group II IEEx OWI-18/6 Group I IEEX (mining) OWIM-18/6 Nominal resistance at 2 15 oil insulation lass H Protection degree IP66 Duty factor 1% Electrical connector DIN pin+gnd 5.1 ertification Solenoids group II for surface plants with gas environment category 1, zone, 1 and 2 TEX 94/9/E, Ex II 1 G, Ex ia II T6 (II T6 or II T5) IEEx, wordwide recognized safety certification Ex ia II T6 (II T6, II T5) Ga Solenoids group I for surface, tunnels or mining plants TEX 94/9/E, Ex I M2 Ex ia I IEEx, wordwide recognized safety certificationex ia (ib) I Mb

3 6 INTRINSILLY SFE SOLENOIDS: ELETRIL ND TEMPERTURE DT Method of protection (1) The group II solenoids are tex certified for minimum temperature -4. Select /T in the valve code for the application with minimum temperature -4 Ex ia / Ex ib according to EN679-: 26, EN679-11:27 Gas group I and II I and II I and II I Temperature class T6 T6 T5 - Electrical characteristic V max 27 V 19,5 V 19,11 V 28 V 28 V 12,4 V I max 13 m 36 m 36 m 25 m 396 m 22 m P max,9 W 1,64 W 1,72 W 1,8 W 2,8 W 6,82 W Minimum supply current 65m, for I.S. barriers see section 12 to 15 Surface temperature (ambient temp. 6 ) mbient temperature (1) ONFIGURTIONS and SPOOLS (representation according to ISO ) (not for DHWL8) (not for DHWL8) /2 631/2/ 751/2 8 MIN HRTERISTIS ssembly position / location ny position Subplate surface finishing Roughness index Ra,4 - flatness ratio,1/1 (ISO 111) mbient temperature Standard execution = /PE option = /T option = Flow direction s shown in the symbols of table 2 Operating pressure Maximum flow DHL8 DHWL8 DHL8 DHWL8 Ports P,,: 35 bar; Port T 21 bar Ports P,,: 25 bar; Port T 16 bar 4 l/min 2 l/min see Q/Dp diagram at section 16 and operating limits at section 17 9 SELS ND HYDRULI FLUID - for other fluids not included in below table, consult our technical office NR seals (standard) = -2 +6, with HF hydraulic fluids = Seals, recommended fluid temperature FKM seals (/PE option) = HNR seals (/T option) = -4 +6, with HF hydraulic fluids = Recommended viscosity 15 1 mm 2 /s - max allowed range mm 2 /s Fluid contamination class ISO 446 class 21/19/16 NS 1638 class 1, in line filters of 25 mm (b1 _>75 recommended) Hydraulic fluid Suitable seals type lassification Ref. Standard Mineral oils NR, FKM, HNR HL, HLP, HLPD, HVLP, HVLPD DIN Flame resistant without water FKM HFDU, HFDR Flame resistant with water NR, HNR HF ISO TEX5

4 1 LE GLNDS ND WIRING - for DHL8 1.1 able glands - only for Multicertification able glands with threaded connections M2x1,5 for standard or armoured cables have to be ordered separately, see tech. table K6 1.2 Ex proof solenoid wiring Multicertification ULUS certification H 3 n 4 M4x2 locking torque 4Nm H 3 M4 locking torque 4Nm Standard version Option /O Standard version Option /O cover with threaded connection for vertical cable gland fitting cover with threaded connection for horizontal cable gland fitting terminal board for cables wiring screw terminal for additional equipotential grounding standard manual override 1 = oil 2 = GND 3 = oil P 3 poles terminal board suitable for wires cross sections up to 2,5 mm 2 (max WG14) Power supply: section of coil connection wires = 2,5 mm 2 Grounding: section of internal ground wire = 2,5 mm 2 section of external ground wire = 4 mm 2 Wiring specifications Power supply: section of coil connection wires = 2,5 mm 2 Grounding: section of internal ground wire = 2,5 mm 2 The additional equipotential grounding can be also performed by the user on the external facility provided on the solenoid case. Section of external ground wire = 4 mm 2 cover with threaded connection for vertical cable gland fitting cover with threaded connection for horizontal cable gland fitting terminal board for cables wiring standard manual override 1 = oil + 2 = GND 3 = oil - P 3 poles terminal board suitable for wires cross sections up to 2,5 mm 2 (max WG14) (2) = alternative GND screw terminal connected to solenoid housing able Specification: Power supply and transducer cables have to comply with following characteristics Suitable for use in lass I Division 1, Gas Groups rmored Marine Shipboard able which meets UL 139 Tinned Stranded opper onductors ronze braided armor Overall impervious sheath over the armor ny Listed (UVZ/ UVZ7) Marine Shipboard able rated 3 V min, 15 min. 3 2,5 mm 2 (14 WG) having a suitable service temperature range of at least -25 to +11 ( /T Models require a temperature range from -4 to +11 ) For lass I wiring the 3 1,5 mm 2 WG 16 cable size is admitted only if a fuse lower than 1 is connected to the load side of the solenoid wiring. Note: a Loctite sealant type 545, should be used on the cable gland entry threads 1.3 able temperature The cable must be suitable for the working temperature as specified in the safety instructions delivered with the first supply of the products. For Multicertification Max ambient temperature [ ] Temperature class Surface temperature [ ] able temperature 45 T6 85 not prescribed 7 T For culus Max ambient temperature [ ] Temperature class Surface temperature [ ] able temperature 55 T T5 1 1

5 11 WIRING - for DHWL8 DIN onnector wiring 1 oil 2 oil 3 GND 2 12 INTRINSILLY SFE RRIERS - for DHWL8 The electric supply to these solenoids must be done through electronic devices situated out of potentially flammable environment (i.e. in safe zone), which limit the electric current to the intrinsically safe solenoid. These electronic devices are normally called intrinsically safe barriers approved and certified according to the Ex ia protection mode. To select the proper intrinsically safe barriers following data must be considered: 1) Vmax and Imax of the solenoid as specified in section 6 must not be exceeded also in fault conditions; 2) the resistance of the solenoid is 15 W and the current supplied by the barrier, in normal operation condition, must be over the min. limit (65 m) to ensure the valve correct operation (over 7 m for max performances). The barriers type Y-XNE 412 are galvanically isolated electronic devices, developed according to the European Norms EN679-/6, EN679-11/7 and certified TEX 94/9/E, protection mode Ex ia II. These barriers ensure the optimized functioning of the tos valves up to the max operating limits specified in section 17. The barriers Y-XNE-412 are double channel type, suitable to operate valves with double or single solenoid. Two single solenoid valves can be connected to the barrier (one to each channel) but they cannot be contemporary operated. 13 MODEL ODE OF I.S. RRIER 13.1 I.S. barrier for double solenoid valves Y-XNE 412 * Supply voltage E = 11/23 V 2 = VD The above barrier can be used both for double or for single solenoid valves With one barrier, two single solenoid valves can be operated but not contemporary 14 TEHNIL HRTERISTIS OF I.S. RRIER Y-XNE 412 N output channels 2 Power supply voltage V ±1% (5/6 HZ) 21,6 53 VD Power consumption < 3W Output voltage Uo 19,5 V Output current Io 341 m Output power Po 1,64 W Galvanic insulation supply/output 25 V / 5 Hz Storage temperature Working temperature Housing material S case Mounting on rail EN 522 Electrical connections screw terminals Method of protection Ex ia II TEX classification Ex II 1 G/D 15 INSTLLTION DIMENSIONS OF I.S. RRIER [mm] Y-XNE 412 Safe zone Hazardous zone Power On led Sol. enabled led Sol. enabled led 9 Y-XNE 412 Power supply Input command Sol. Input command Sol. - VD/~ + VD/~ +24 VD GND +24 VD GND Sol. Sol. TEX5

6 Internal leakage [cm 3 /min] 16 Q/DP DIGRMS based on mineral oil ISO VG 46 at 5 DHL8 Flow direction T P P T T PT T Spool type center center E 1 1/2 3 E Valve pressure drop Dp [bar] Flow rate [l/min] DHWL8 Flow direction Spool type 1 1/2 3 T P P T T PT T center center E D E Valve pressure drop Dp [bar] E D Flow rate [l/min] 17 OPERTING LIMITS based on mineral oil ISO VG 46 at 5 The diagrams have been obtained with warm solenoids and power supply at lowest value (Vnom - 1%). The curves refer to application with symmetrical flow through the valve (i.e. P and T). In case of asymmetric flow and if the valves have the devices for controlling the switching times the operating limits must be reduced. DHL8 urve spool type all spools Inlet pressure [bar] Flow rate [l/min] DHWL8 36 urve spool type/current supply 3 all spools / 8 m all spools / 6 m note: valve P/Q limits depends to the current supply provided from the intrinsically safe barrier. In the diagrams are riported the P/Q limits at current 6 m and 8 m Inlet pressure [bar] Flow rate [l/min] 18 INTERNL LEKGES based on mineral oil at viscosity 15 cst Spool type 1 1/2 3 center pos. P P T T Pressure [bar]

7 19 DIMENSIONS - for DHL8 multicertified and UL [mm] ISO 441: 25 Mounting surface: Fastening bolts: 4 socket head screws: M5x5 class 12.9 Tightening torque = 8 Nm Seals: 4 OR 18 Ports P,,,T: Ø = 7.5 mm (max) ø P = PRESSURE PORT, = USE PORT T = TNK PORT DHL (UL) DHL8/ (UL) DHL (UL) (UL) Mass (Kg) DH-6 2,65 DH-7 4,3 Option /O +,35 Option /WP +, DHL8/O DHL8/WP (UL) (UL) H27 TEX5

8 2 DIMENSIONS for DHWL8 [mm] ISO 441: 25 Mounting surface: (see table P5) Fastening bolts: 4 socket head screws M5x5 class 12.9 Tightening torque = 8 Nm Seals: 4 OR 18; Diameter of ports,, P, T: Ø 7,5 mm (max) ø P = PRESSURE PORT, = USE PORT T = TNK PORT Mass (Kg) DHWL8-6 3 DHWL8-7 5 DHWL8-6 Standard version min = = Mining version (different cover shape for mining version) DHWL8-6/ Option /WP DHWL8-7 Ø Note: the connector is supplied with the valves 5/17