Catalog HY14-2502/US Introduction pplication Series D81 hydraulic directional control valves are high performance, solenoid controlled, pilot operated, 2-stage, 4-way valves. hey are available in 2 or 3- position styles and are manifold mounted. hese valves conform to NF's D08, CEO 8 mounting pattern. Operation Series D81 directional valves consist of a 5-chamber style main body, a case hardened sliding spool, and a pilot valve or pilot operators (hydraulic or pneumatic). Series D81 Features Easy access mounting bolts. 350 ar (5000 SI) pressure rating. Flows to 622 LM (160 GM) depending on spool. Choice of four operator styles. Rugged four land spools. Low pressure drop. hosphate finish. D81VW Solenoid Operated lug-in Conduit ox D81VL Lever Operated D8 Oil ilot Operated D81V ir ilot Operated 2502-5.p65, dd 124 arker Hannifin Corporation Elyria, Ohio, US
echnical Information Series D81VW General Description Series D81VW directional control valves are 5-chamber, pilot operated, solenoid controlled valves. hey are available in 2 or 3-position styles. hese valves are manifold or subplate mounted, and conform to NF's D08, CEO 8 mounting pattern. Operation Series D81VW pilot operated valves are standard with low shock spools and pilot orifice. he orifice can be removed if a faster shift is required. It is recommended, however, that all systems operating above 138 ar (2000 SI) use the standard valve to avoid severe shock. Features Low pressure drop design. Hardened spools provide long life. Fast response option available. Wide variety of voltages and electrical connection options. Explosion proof availability. No tools required for coil removal. Specifications Mounting attern NF D08, CEO 8, NG25 Maximum Operating 350 ar (5000 SI) Standard ressure CS 207 ar (3000 SI) Maximum ank Line ressure Maximum Drain ressure Minimum ilot ressure Maximum ilot ressure Nominal Flow Maximum Flow Internal Drain Model: 102 ar (1500 SI) C Only 205 ar (3000 SI) DC Std., C Optional External Drain Model: 350 ar (5000 SI) CS 102 ar (1500 SI) 102 ar (1500 SI) C Only 205 ar (3000 SI) DC Std., C Optional CS 5.1 ar* (75 SI) 102 ar (1500 SI) 350 ar (5000 SI) Standard CS 207 ar (3000 SI) 302 LM (80 GM) See Reference Chart * 6.9 ar (100 SI) for spool configurations 002, 007,008, 009 & 014. Response ime Response times (milliseconds) are measured at 345 ar (5000 SI) and 300 LM (80 GM) with various pilot pressures as indicated. Solenoid ilot ull-in Drop-Out ype ressure Std Fast Std Fast 500 140 100 70 70 DC 1000 125 90 76 76 2000 100 70 70 70 500 100 60 60 60 C 1000 85 50 60 60 2000 60 30 60 60 ecause of the high drain line pressure transients generated during shifting, use of the fast response option is not recommended for pilot pressures exceeding 205 ar (2000 SI) olt Kits For use with 3/4" Manapaks and D8 Series Directional Control Valves. ll bolts are SE grade 8, 1/2-13 UNC-13. 2.75 hick Manapaks (New Style) olt Kit 0 K228 1 K131 2 K132 ilot Valve with 1 Manapak: K403 (M5 x 90 Metric olt) 2502-5.p65, dd 125 arker Hannifin Corporation Elyria, Ohio, US
Ordering Information D Directional Control Valve 81V asic Valve ctuator# Spool Style ilot Supply Seal Solenoid and Drain Voltage NF D08, CEO 8, DIN NG25 High Flow, D03 ilot Code W HW Description Solenoid, Wet in, Screw-in Reversed Wiring # Valve schematic symbols are per NF/NSI standards, providing flow to when energizing solenoid. Note operators reverse sides for #008 and #009 spools. See installation information for details. o configure per DIN standards ( coil over port, coil over port) code valves as D81VHW***. Code Code N V Description Description Nitrile Fluorocarbon 1 Internal ilot, External Drain 2 External ilot, External Drain 3 Internal ilot w/check, External Drain 4* Internal ilot, Internal Drain 5 External ilot, Internal Drain 6 Internal ilot w/check Internal Drain * Not available with 002, 007, 008, 009, 014 and 030 spools. Code Description ** 24/50 VC D 120 VDC G 198 VDC J 24 VDC K 12 VDC N*** 220/50 VC *** 110/50 VC Q** 100/60 VC R 24/60 @VC 240/60-220/50 VC U 98 VDC Y 120/60-110/50 VC Z 250 VDC ** High watt only. *** Explosion proof only. Code Symbol Code Symbol 001 011 002 012 003 014 004 015 005 016 006 020* 030** 007 081 008* 009** 082 * 008 & 020 spools have closed crossover. ** 009 & 030 spools have open crossover. Code Description Symbol * Single solenoid, 2 position, spring offset. to and to in offset position. C Double solenoid, 3 position, spring centered. D* Double solenoid, 2 position, detent. E Single solenoid, 2 position, spring centered. to and to when energized. F Single solenoid, 2 position, spring offset, energized to center. Spacer on side. to and to in offset position. H* Single solenoid, 2 position, spring offset. to and to in offset position. K Single solenoid, 2 position, spring centered. to and to when energized. M Single solenoid, 2 position, spring offset, energized to center. Spacer on side. to and to in offset position. * vailable with 020 and 030 spools only. High watt only. b b b b b a a a a a 2502-5.p65, dd old: Designates ier I products and options. Non-old: Designates ier II products and options. hese products will have longer lead times. 126 arker Hannifin Corporation Elyria, Ohio, US
Ordering Information Solenoid Connection Coil Options ube Options Manual Override Options Electrical Options Shift Response and Indication pprovals Valve Variations Design Series NOE: Not required when ordering. Code Description C Conduit ox D Metric lug (M12X1), DESIN E* Explosion roof G lug-in J * Deutsch (D06-2S) M * Metri-ack (150) DIN with lug S * Double Spade W* DIN without lug * Not available with lights. DC only. See next page for Valve Variations Code Description Omit Standard Valve 3* CS US (UL 429) 4* CS Canada * Not available with C high pressure tube., C, H styles only. J, K, Y, U voltages only. C, G, W sol. connections only. Code Description Omit High Watt D* Explosion roof, EEXD EX E* Explosion roof, EEXME EX F** Low Watt C CS Hazardous Location L*** 8 Watt O* Explosion roof, MSH U* Explosion roof, UL/CS * Not available with lights. ** C only. *** DC and C Rectified only. pplicable to conduit box and plug-in style only. Code Description Omit Standard Response I3* Monitor Switch Direct Op. End Stroke I6* Monitor Switch Direct Op. Start Stroke * Not available on F or M styles. Not CE or CS approved. Code Description Omit No Options J* Diode Surge Suppressor Rectified Coil * DC only; not available with DIN plug and lights. DC tube standard. Code Omit Description Low ressure, C only 103.5 ar (1500 SI) H* High ressure, C only 207 ar (3000 SI) G Std. ressure, DC/C Rectified 207 ar (3000 SI) * Not available with CS Code Description Omit Standard * Extended with oot * No Override W* Waterproof rotection * Manual override options not available on explosion proof valves. Valve Weight: Standard olt Kit: Metric olt Kit: Double Solenoid 19.6 kg (43.2 lbs.) K228 KM228 2502-5.p65, dd old: Designates ier I products and options. Non-old: Designates ier II products and options. hese products will have longer lead times. 127 arker Hannifin Corporation Elyria, Ohio, US
Ordering Information Valve Variations Code Description D31*W D61*W D81*W D101*W 5 Signal Lights 6 Manaplug rad Harrison Mini 56 Manaplug (Mini) with Lights 7 Manaplug rad Harrison (12x1) Micro 7 Manaplug (Micro) with Lights (D1 only) 20 Fast Response 1 Manaplug (Mini) Single Sol. 5-pin 1 Manaplug (Micro) Single Sol. 5-pin 1C Manaplug (Mini) Single Sol. 5-pin, with Lights 1D Manaplug (Micro) Single Sol. 5-pin, with Lights 1E Manaplug (Mini) Single Sol. 5-pin, with Stroke djust & End 1F Manaplug (Micro) Single Sol. 5-pin, with Stroke djust & End 1G Manaplug (Mini) Single Sol. 5-pin, with Stroke djust & End and Lights 1H Manaplug (Micro) Single Sol. 5-pin, with Stroke djust & End and Lights 1M Manaplug Opposite of Normal 1 ainted ody 3 ilot Choke Meter Out 3 ilot Choke Meter In 3C ilot ressure Reducer 3D Stroke djust End 3E Stroke djust End 3F Stroke djust & End 3G ilot Choke Meter Out with Lights 3H ilot Choke Meter In with Lights 3J ilot ressure Reducer with Lights 3K ilot Choke Meter Out with Stroke djust & End 3L ilot Choke Meter Out, Stroke djust & End with Lights and Manaplug (Mini) 3M ilot Choke Meter Out, ilot ressure Reducer, Stroke djust & End 3R ilot Choke Meter Out and ilot ressure Reducer 3S ilot Choke Meter Out with Lights and Manaplug (Mini) 3W Manaplug (Mini) 5-pin with Stroke djust & End and Lights 4 rotection Cap for Monitor Switch 4D* wist & Lock Override (Old 5426) 4E* ush Manual Override (Old x5450) gray = available; white= not available *DC/C rectified only. 2502-5.p65, dd 128 arker Hannifin Corporation Elyria, Ohio, US
echnical Information Series D81 Reference Data MaximumFlow, Maximum Flow, LM (GM) LM (GM) Spool 350 ar (5000 SI) Spool 350 ar (5000 SI) Model Symbol w/o Malfunction Model Symbol w/o Malfunction D81V*001 624 (160) D81V* Series ressure Drop Chart he following chart provides the flow vs. pressure drop curve reference for the Series D81V* valve by spool type. erformance Curves ressure Drop SI 220 290 180 160 140 120 100 80 ar 14 12 10 8 6 D81V*008 D81V*009 312 (80) D81V*002 624 (160) D81V*011 624 (160) D81V*003 624 (160) D81V*012 312 (80) D81V*004 624 (160) D81V*014 312 (80) D81V*005 624 (160) D81V*015 624 (160) D81V*006 624 (160) D81V*016 624 (160) D81V*007 312 (80) * See Universal Spool Chart for additional options. VISCOSIY CORRECION FCOR Viscosity (SSU) 75 150 200 250 300 350 400 % of Δ (pprox.) 93 111 119 126 132 137 141 Curves were generated using 100 SSU hydraulic oil. For any other viscosity, pressure drop will change as per chart. 9 D81V*020 D81V*030 624 (160) D81VW ressure Drop Reference Chart Curve Number Spool No. 001 1 1 3 4 002 2 2 5 4 6 003 1 1 4 4 004 1 1 4 6 005 2 2 3 4 006 2 2 3 4 007 1 2 8 3 6 009 2 2 7 3 4 011 1 1 3 4 012 1 1 9 3 4 014 2 1 8 6 3 015 2 2 5 5 016 2 2 4 3 020/030 2 2 3 4 8 7 6 5 4 3 2 1 60 40 20 4 2 2502-5.p65, dd 0 LM 0 GM 40 80 120 160 200 240 280 320 360 400 440 480 520 560 600 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 Flow 129 arker Hannifin Corporation Elyria, Ohio, US
Catalog HY14-2502/US echnical Information Solenoid Ratings Insulation System llowable Deviation from rated voltage rmature CS File Number Environmental Capability Class F -10% to +15% for DC and C rectified coils -5% to +5% for C Coils Wet pin type LR60407 DC Solenoids meet NEM 4 and I67 when properly wired and installed. Contact HVD for C coil applications. Explosion roof Solenoid Ratings* UL & CS (EU) Class I, Div 1 & 2, Groups C & D Class II, Div 1 & 2, Groups E, F & G s defined by the NEC MSH (EO) Complies with 30CFR, art 18 EX (ED) Complies with EX requirements for: Exd, Group II; EN50014: 1999+ mds. 1 & 2, EN50018: 2000 CS Hazardous Location Class II, Div 1 & 2, Groups E, F & G * llowable Voltage Deviation ±10%. Note that Explosion roof C coils are single frequency only. Voltage Code Code ower Code Voltage In Rush mps mperage In Rush mps D81VW V @ 3MM Holding mps D81VW Watts D81VW Resistance D81VW 24/50 VC, High Watt 7.00 mps 168 V 2.65 mps 28 W 1.67 ohms D L 120 VDC N/ N/ 0.09 mps 10 W 1584.00 ohms N/ N/ 0.26 mps 30 W 528.00 ohms G L 198 VDC N/ N/ 0.05 mps 10 W 3920.40 ohms N/ N/ 0.15 mps 30 W 1306.80 ohms J L 24 VDC N/ N/ 0.44 mps 10 W 51.89 ohms N/ N/ 1.32 mps 30 W 17.27 ohms K L 12 VDC N/ N/ 0.88 mps 10 W 12.97 ohms N/ N/ 2.64 mps 30 W 4.32 ohms L L 6 VDC N/ N/ 1.67 mps 10 W 3.59 ohms N/ N/ 5.00 mps 30 W 1.20 ohms Q 100 VC / 60 Hz 1.7 pms 170 V 0.56 mps 24 W 26.0 ohms QD 100 VC / 60 Hz 0.41 mps 135 V 0.41 mps 18 W 31.2 ohms QD 100 VC / 50 Hz 0.57 mps 150 V 0.57 mps 24 W 31.2 ohms R 24/60 VC, High Watt 8.00 mps 192 V 2.70 mps 27 W 1.40 ohms F 24/60 VC, Low Watt 6.67 mps 160 V 2.20 mps 23 W 1.52 ohms 240/60 VC, High Watt 0.77 mps 185 V 0.26 mps 25 W 134.50 ohms 220/50 VC, High Watt 0.82 mps 180 V 0.31 mps 27 W 134.50 ohms F 240/60 VC, Low Watt 0.70 mps 168 V 0.22 mps 21 W 145.00 ohms F 220/50 VC, Low Watt 0.75 mps 165 V 0.26 mps 23 W 145.00 ohms U L 98 VDC N/ N/ 0.10 mps 10 W 960.00 ohms Y 120/60 VC, High Watt 1.55 mps 186 V 0.49 mps 25 W 33.70 ohms 110/50 VC, High Watt 1.65 mps 182 V 0.58 mps 27 W 33.70 ohms F 120/60 VC, Low Watt 1.40 mps 168 V 0.42 mps 21 W 36.50 ohms F 110/50 VC, Low Watt 1.50 mps 165 V 0.50 mps 23 W 36.50 ohms Z L 250 VDC N/ N/ 0.04 mps 10 W 6875.00 ohms N/ N/ 0.13 mps 30 W 1889.64 ohms Explosion roof Solenoids R 24/60 VC 7.63 mps 183 V 2.85 mps 27 W 1.99 ohms 240/60 VC 0.76 mps 183 V 0.29 mps 27 W 1.34 ohms N 220/50 VC 0.77 mps 169 V 0.31 mps 27 W 1.38 ohms Y 120/60 VC 1.60 mps 192 V 0.58 mps 27 W 33.50 ohms 110/50 VC 1.47 mps 162 V 0.57 mps 27 W 34.70 ohms Q 100/60 VC 1.90 mps 192 V 0.70 mps 27 W 38.60 ohms K 12 VDC N/ N/ 2.75 mps 33 W 4.36 ohms J 24 VDC N/ N/ 1.38 mps 33 W 17.33 ohms D 120 VDC N/ N/ 0.28 mps 33 W 420.92 ohms Z 250 VDC N/ N/ 0.13 mps 33 W 1952.66 ohms 2502-5.p65, dd 130 arker Hannifin Corporation Elyria, Ohio, US
Dimensions Inch equivalents for millimeter dimensions are shown in (**) Conduit ox, Double C Solenoid 99.9 (3.94) 53.2 (2.10) 130.2 (5.13) ilot orts/drains 116.0 (4.57) 92.1 (3.63) 306.2 Ref. (12.06) 77.0 (3.03) 1/8" S 105.3 (4.15) 210.7 (8.30) 58.4 (2.30) 43.0 (1.69) Min. Coil Removal 24.8 (0.98) 49.6 (1.95) 3.0 (0.12) 1/2 NF hread oth Ends 224.6 (8.85) Manual Override 196.0 (7.72) 153.8 (6.06) 130.0 (5.12) 48.0 (1.89) 153.1 (6.03) 17.5 (0.69) 153.1 (6.03) 57.0 (2.25) 6.3 (0.25) 57.2 (2.25) 114.3 (4.50) 1/16 lug for Variations 2 & 5 orque to: 11.67 ±1.67 Nm (105 ±15 in-lbs) Do Not Loctite M6 x 1 lug for Variations 1, 2 & 3 orque to: 1.78 ±0.22 Nm (16 ±2 in-lbs) Do Not Loctite Note: 57mm (2.24") from bottom of bolt hole counterbore to bottom of valve. 2502-5.p65, dd 131 arker Hannifin Corporation Elyria, Ohio, US
Dimensions Inch equivalents for millimeter dimensions are shown in (**) Conduit ox and Stroke djust, Double C Solenoid 105.3 (4.15) 210.7 (8.30) Stroke djust ort End Variation 3D 191.9 (7.56) 191.9 (7.56) Stroke djust ort End Variation 3E Note: 57mm (2.24") from bottom of bolt hole counterbore to bottom of valve. Conduit ox and ilot Choke Control, Double C Solenoid Conduit ox, Single C Solenoid 163.7 (6.45) 58.4 (2.30) 39.6 (1.56) 264.1 (10.40) ilot Choke Control Variation 3 2502-5.p65, dd 132 arker Hannifin Corporation Elyria, Ohio, US
Dimensions Inch equivalents for millimeter dimensions are shown in (**) lug-in Conduit ox, Double DC Solenoid 99.9 (3.94) 53.2 (2.10) 130.2 (5.13) 116.0 (4.57) 92.1 (3.63) 77.0 (3.03) 306.2 (12.06) Ref. 122.2 (4.81) 244.4 (9.63) 66.4 (2.61) 54.0 (2.13) Min. Coil Removal 24.8 (0.98) 49.6 (1.95) 1/2 NF hread oth Ends 207.5 (8.18) Manual Override 220.0 153.8 (8.75) (6.06) 130.0 (5.12) 48.0 (1.89) 153.1 (6.03) 17.5 (0.69) 153.1 (6.03) 57.0 (2.25) Note: 57mm (2.24") from bottom of bolt hole counterbore to bottom of valve. 6.3 (0.25) 57.2 (2.25) 114.3 (4.50) 2502-5.p65, dd 133 arker Hannifin Corporation Elyria, Ohio, US
Dimensions Inch equivalents for millimeter dimensions are shown in (**) lug-in Conduit ox and Stroke djust, Double DC Solenoid 122.2 (4.81) 244.4 (9.63) Stroke djust ort End Variation 3D 191.9 (7.56) Stroke djust ort End Variation 3E 191.9 (7.56) Note: 57mm (2.24") from bottom of bolt hole counterbore to bottom of valve. Hirschmann and ilot Choke Control, Double DC Solenoid lug-in Conduit ox, Single DC Solenoid 188.5 (7.43) 66.4 (2.61) 39.6 (1.56) ilot Choke Ctrl. Var. 3 245.5 (9.67) 230.5 (9.08) 2502-5.p65, dd 134 arker Hannifin Corporation Elyria, Ohio, US
Dimensions Inch equivalents for millimeter dimensions are shown in (**) lug-in Conduit ox, Double C Solenoid with Variation I3 (Monitor Switch) 99.9 (3.94) 53.2 (2.10) 130.2 (5.13) 39.7 (1.56) 92.1 (3.63) 116.0 (4.57) 398.8 Ref. (15.71) 77.0 (3.03) 122.2 (4.81) 244.4 (9.63) 66.4 (2.61) 54.0 (2.13) Min. Coil Removal 24.8 (0.98) 49.6 (1.95) 1/2 NF hread oth Ends 106.5 (4.20) 223.2 (8.79) 207.5 (8.18) 153.8 (6.06) 130.0 (5.12) 48.0 (1.89) Manual Override 245.0 (9.65) 17.5 (0.69) 153.1 (6.03) 57.0 (2.25) 6.3 (0.25) 57.2 (2.25) 114.3 (4.50) Monitor Switch (valve variation I3 and I6) his feature provides for electrical confirmation of the spool shift. his can be used in safety circuits, to assure proper sequencing, etc. Switch Data in 1 and in 3 have outputs equal to the input. When the monitor switch has the output to in 1, in 3 will have an output of zero, and vice-versa. When the valve is switched, in 1 and in 3 will switch outputs. IN 2 Input 18-42 VDC osition Control Switch Sensor / Driver Circuitry Load 0.2 Max IN 1 IN 3 Outputs 2502-5.p65, dd 135 arker Hannifin Corporation Elyria, Ohio, US
echnical Information Series D81, D8 Installation Information FOR MXIMUM VLVE RELIILIY, DHERE O HE FOLLOWING INSLLION INFORMION. he following is important installation information which applies to all directional control valves described in this catalog. Mounting osition Detent Horizontal Spring Offset Unrestricted Spring Centered Unrestricted Fluid Recommendations remium quality hydraulic oil with a viscosity range between 32-54 cst. (150-250 SSU) t 38 C (100 F) is recommended. he absolute operating viscosity range is from 16-220 cst. (80-1000 SSU). Oil should have maximum anti-wear properties and rust and oxidation treatment. Fluids and Seals Valves using synthetic, fire-resistant fluids require special seals. When phosphate esters or its blends are used, FLUOROCRON seals are required. Waterglycol, water-in-oil emulsions and petroleum oil may be used with SNDRD seals. Silting Silting can cause any sliding spool valve to stick and not spring return if held under pressure for long periods of time. he valve should be cycled periodically to prevent sticking. Special Installations Consult your arker representative for any application requiring the following: ressure above rating. Fluid other than those specified. Oil temperature above 71.1 C (160 F). Flow path other than normal. Mounting atterns Series NF CEO D81V*, D8 D08 8 orque Specifications he recommended torque values for the bolts which mount the valve to the manifold or subplate are as follows: 135.6 Nm (100 ft-lbs). Filtration For maximum valve and system component life, the system should be protected from contamination at a level not to exceed 125 particles greater than 10 microns per milliliter of fluid (SE class 4/ISO 16/13). 2502-5.p65, dd 142 arker Hannifin Corporation Elyria, Ohio, US
Installation Information Series D81 Series D81VW, D81V, D81VL ank and Drain Line Surges If several valves are piped with a common tank or drain line, flow surges in the line may cause an unexpected spool shift. Detent style valves are most susceptible to this. Separate tank and drain lines should be piped in installations where line surges are expected. Electrical Characteristics (Detented Spool) Only a momentary energizing of the solenoid is necessary to shift and hold a detented spool. Minimum duration of the signal is 0.1 seconds for DC voltages. For C voltages the response time is 0.06 seconds. Spool position will be held provided the spool centerline is in a horizontal plane, and not shock or vibration is present to displace the spool. Electrical Failure or Loss of ilot ressure (D81V or D81V) Should electric power fail or loss of pilot pressure occur, spring offset and spring centered valves will shift to the spring held position. Detented valves will stay in the last position held before power failure. If main flow does not fail or stop at the same time power fails, machine actuators may continue to function in an undesirable manner or sequence. ilot/drain Characteristics ilot ressure: 5.1 to 345 ar (75 to 5000 SI) 6.9 ar (100 SI) for spools 002, 007, 008, 009 & 014 External: n oil source sufficient to maintain minimum pilot pressure must be connected to the X port of the main body. When using the external pilot variation, a 1/16" pipe plug must be present in the main body pilot passage. (For details see Dimension pages.) his plug will be furnished in valves ordered with pilot code 2, 3, 5 or 6. Internal: Flow is internally ported from the pressure port of the main valve body to the port of the pilot valve. he pressure developed at the port of the pilot valve must be 5.1 ar (75 SI) minimum at all times or 6.9 ar (100 SI) for spools 002, 007, 008, 009 & 014. Integral Check: Valves using internal pilot and internal drain with an open center spool (spools 2, 7, 8 & 9) can be ordered with an integral check valve in the pressure port of the main valve codes 3 & 6. ilot oil will be internally ported from the upstream side of this check to the port of the pilot valve, ensuring sufficient pilot pressure. 1/16" pipe plug will be present in the main body. he X port in the subplate must be plugged when using the integral check. ilot Valve Drain: Maximum pressure 102 ar (1500 SI) C optional, 207 ar (3000 SI) DC standard. External: When using an external drain, a M6 x 1 x 6mm long set screw must be present in the main body drain passage. (For details see Dimension pages.) his plug will be furnished in valves ordered with drain code 1, 2 or 3. Drain flow from the pilot valve is at the Y port of the main body and must be piped directly to tank. Maximum drain line pressure is 102 ar (1500 SI), C optional, 207 ar (3000 SI) DC standard. ny drain line back pressure is additive to the pilot pressure requirement. Internal: Drain flow from the pilot valve is internally connected to the main valve tank port. ank and drain pressure are then identical so tank line pressure should not exceed 102 ar (1500 SI) C optional, 207 ar (3000 SI) DC standard. ny tank line back pressure is also additive to the pilot pressure requirement. If flow surges (a cause of pressure surges) are anticipated in the tank line, an external drain variation is recommended. he Y port in the subplate must be plugged when using an internal drain. D81V* Flow aths Style No Solenoid/Operator Solenoid/Operator Solenoid/Operator Code Description Energized Energized Energized Spring Offset and and C Spring Centered Centered and and D Detented Last osition Held and and E Spring Centered Centered and F Spring Offset, Shift to Center and Centered H Spring Offset and and K Spring Centered Centered and M Spring Offset, Shift to Center and Centered D81VW only. 2502-5.p65, dd 143 arker Hannifin Corporation Elyria, Ohio, US
Installation Information Series D8 Series D8 ank and Drain Line Surges If several valves are piped with a common tank or drain line, flow surges in the line may cause an unexpected spool shift. Detent style valves are most susceptible to this. Separate tank and drain lines should be piped in installations where line surges are expected. Loss of ilot ressure Should a loss of pilot pressure occur, spring offset and spring centered valves will shift to the spring held position. No spring valves will stay in the last position held. If main hydraulic flow does simultaneously stop, machine actuators may continue to function in an undesirable manner or sequence. ilot Drain Characteristics ilot ressure: 5.1 to 350 ar (75 to 5000 SI) 6.9 ar (100 SI) for spool configurations 2, 7, 8, 9 & 14 Direct pilot operated valves use the X and Y ports to supply pilot oil directly to the ends of the spool, providing spool shifting force. block mounted on top of the valve body is internally cored to make the necessary connections. hus when X is pressurized, Y is used as a drain; and when Y is pressurized, X becomes the drain. ny back pressure in these lines when they are being used as a drain is additive to the pilot pressure requirement. Internal Drain: On spring offset models, only the X port is pressurized, as the spring returns the spool to its at rest position. On these models, Y may be internally drained through the main tank passage in the valve. Flow ath/ilot ressure Style Code C H Recommended Description X & Y X ort Y ort Special Notes Control Valve De-ressurized ressurized ressurized For ilot Oil wo osition Spring Offset hree osition Spring Centered wo-osition Spring Offset X ort may be pressurized to,,, assist spring in returning spool to offset position (ext. only) Flow paths will be reversed on Center,, valves with tandem center (9) spools Y ort may be pressurized,,, to assist spring in returning spool to offset position y y x x 2502-5.p65, dd 144 arker Hannifin Corporation Elyria, Ohio, US
Installation Information Series D81, D8 Subplate Mounting NF D08, CEO 8 & NG25 Recommended Mounting Surface Surface must be flat within.102 mm (0.0004 inch).i.r and smooth within 812.8 micro-meters (32 micro-inch). orque bolts to 135.6 Nm (100 ft-lbs). Mounting osition Valve ype Detent (Solenoid) Spring Offset Spring Centered Mounting osition Horizontal Unrestricted Unrestricted For maximum valve reliability, adhere to the following installation information. Mounting attern Inch equivalents for millimeter dimensions are shown in (**) 152.4 (6.00) 130.2 (5.13) 100.8 (3.97) 112.7 (4.44) 94.5 (3.72) - - 17.5 (0.69) 4.8 (0.19) 77.0 (3.03) 29.4 (1.16) 53.2 (2.09) 17.5 (0.69) ½ 13 UNC 2x22.22 min th'd dp. (M12 x 0.875) 6 holes 0.28 S (0.011) 130.0 (5.12) 92.1 (3.63) - - 74.6 (2.94) 73.0 (2.88) O 11.2 (0.441) max. 3 holes 0.56 L (0.022) O 23.42 (0.922) max. 4 holes 0.56 L (0.022) O0.288/.272x0.31mindp. (7.32 / 6.91 x 8) 2 holes 0.28 L (0.011) 2502-5.p65, dd 145 arker Hannifin Corporation Elyria, Ohio, US