EXPLOSION PROOF DIRECTIONAL CONTROL VALVE TYPE ED6 SERIE 5X USA NEC STANDARD

Transcription

1 EXPLOSION PROOF DIRECTIONAL CONTROL VALVE TYPE ED6 SERIE 5X USA NEC STANDARD R NOT/E 10-0/05-08 CARACTERISTICS Hydraulic : Cetop. Maximum pressure in service : 15 Bar. Nominal flow. : 60 l/mn. 7 hydraulic symbols. Electric : Protection index : IP 66 / NEMAX. Standards : USANEC NFPA70, Class I, Div. 1-, Group B. Temperature range : T5. ED6 D5X/UL -DC-T5 05 PA DESCRIION OF FUNCTION Directional control valves type ED 6 are solenoid operated directional spool valves. They control start, stop and direction of an oil flow. These valves basically consist of the housing (1), one or two solenoids (), the control spool (), and return springs (). In unoperated condition the control spool () is held in the neutral or starting position by the return springs () (except for type O and OF). The operation of the control spool is by means of oil immersed solenoids (). The force of the solenoid () acts via the plunger (5) on the control spool () and pushes it from its rest position into the required end position. When the solenoid is de-energised (), the control spool () is returned to its original by the return springs (). An hand emergency button, allows movement of the control spool () without solenoid energisation. TYPE : ED6 C or D 5X/O these are directional valves with switching positions and solenoids without locking. When the solenoid is energised there is no median position (without return springs). TYPE : ED6 C or D 5X/OF these are directional valves with switching positions and solenoids with locking in position. CARDRIDGE THROTTLE Use of the cardridge throttle is necessary when, because of the given operating conditions, flow larger than that allowed by the valve operating limits arise during spool cross-over. 1 Throttle cartridge fited in "P "line of hydraulic valve. P the 5 A T (P) B.. ED6...5X...B0.. 1

2 SOLENOID GENERALITY Oil immersed direct curent solenoid (1) impervious to 100 bar maximum pressure, its mechanical impact strength is approved by the CENELEC for explosion proof equipment. Insulation to IP 66, it can work in tropical climates. The plunger operate in oil to reduce friction, dissipate head and cushions and drives control spool. Direct curent solenoid has the advantages of : - slow movement of the control spool. - energized maintenance of the control valve in intermediary position, is not detrimental to the solenoid. The solenoid housing can be oriented in steps of 90 on directional control valve. ELECTRIC CONNECTION An explosion proof connexion can be made on the solenoid housing by rigid conduit threaded 1/ N. 1 Seal integrated in the housing. The lead wire (1) length normally suplied is 1,5 meter. Active lead wire (1), Earth lead wire (). Threaded hole 1/ N ().

3 CARACTERISTICS HYDRAULIC Maximum operating pressure : Ports A, B, P. Bar Up to Maximum operating pressure : Port T. Bar Up to With spool type A and B, port T must be used as a drain port, if the operating pressure lies above 100 Bar. Maximum flow Hydraulic fluid Viscosity range Fluid temperature range L/Mn. mm²/s ( C) (see operating curves of pressure drop) Mineral oils, Weight : - valve with 1 solenoid (Kg) - valve with solenoids (Kg) 7 Mounting position : - Positions - Positions Optional. Optional - Horizontal prefered. Standard symbol : - positions D Y others symbols (see page 6) - positions E G J ELECTRICAL Continous voltages available. V/DC Temperature range with ambiente 0 C. T T5 Power requirement. Protection index. VA 16, IP 66 / Tropicalised - NEMA X Duty cycle. 100 % Maximum coil temperature. Outlet connection ( C). 10 C 1/"N STANDARD National electrical code Approval number Underwriters Laboratories File Number NEC NFPA 70 UL LISTED X6 E (N)

4 HYDRAULIC CODE REFERENCES ED X service ports service ports D Y OF O D D E J G Middle Position Normal position Hydraulic housing series number. 5X The above refer to symbols D, Y only. Without return spring, with locking control spool. Without return spring. With return springs No code OF O The above refer to E, J, G,... Ect. With one solenoid side A. With one solenoid side B. With one solenoid side A and side B.: No code A B For use when the flow is greater than the valve capacity, fitted in P line. Throttle Ø 0.8 MM : Throttle Ø 1,0 MM : Throttle Ø 1, MM : Without throttle : No code B08 B10 B1

5 ELECTRICAL CODE UL No code : Wires length 1.5 meter Wires length meters PB No code : Without control With control pushbutton side B PA No code : Without control With control pushbutton side A 05 Connection on body in 1/" N The lead wires length normally suplied is 1,5 Meter. T5 T... Temperature range. DC Direct curent (Only) Voltage. UL Solenoid conforme to the american standard for use in hazardous locations (UL100). 5

6 HYDRAULIC VARIATION SYMBOLS positions with one solenoid side A. = A With return spring. = C positions with one solenoid side B. = B positions with solenoid sideaand side B..../O Without return spring..../of With locking control spool. = A.../... = C.../... positions with one solenoid side A. a 0 a 0 =EA =E1A 0 positions with one solenoid side B. b 0 b =EB =E1B a positions with one solenoid side A & B. 0 b a 0 b =E =E1 =FA =FB =F =GA =GB =HA =HB =H =JA =JB =LA =LB =L =MA =MB =M =PA =PB =P =QA =QB =Q =RA =RB =R =TA =TB =T =UA =UB =U =VA =VB =V =WA =WB =W 6

7 DIMENSIONS (In mm) 1 : Side A solenoid housing. : Side B solenoid housing. : Hydraulic valve housing. : See for dimensions with manual control reset. 5 : x fixing screw M5 x : Lead wires ACE ED6 XXXXX UL DC- T Ref 8 Solenoid housing can be oriented all 90 on L = X For X dimension, see under With control pushbutton X = 180 maxi Ø 5 5 Without control pushbutton X = 10 Ø 5 7

8 OPERATING LIMITS CURVES OF PRESSURE DROP CURVE 7 : SYMBOL "R" IN SWITCHING POSITION : B - A CURVE 8 : SYMBOL "G" IN NEUTAL POSITION : P - T PRESSURE DROP P( bar) FLOW Q( L/mn) Mesured at V : 6 mm ² /S, t : 50 C HYDRAULIC VALVE CONNECTION CETOP T M5 x Ø 6 1 A P B