WK Proportional intrinsically safe pressure relief valves type IWZP(P, S, G)E10 and pilot valve type IWZEP6 NUAL APPLICATION

Transcription

1 ALICAION roportional intrinsically safe pressure relief valves type IWZ(, S, G)E0 and pilot valve type IWZE NS0 up to 0 Ma up to 00 DAA SHEE - OERA RAION MANUA NUAL Intrinsically safe, proportional, pressure-relief valves type IWZ(, S, G)E0 E0 are used for controlling pressure in a hydraulic system. Control pressure in the system is a function of the current supplied to the coil of the proportional solenoid. he valves are intended to work in an explosive atmosphere in underground mining pits (group I) and in machines working near flammable substances in the form of gases, vapours, mists (group II). he IWZ(, S, G)E0 E0 valves have certificates of intrinsic safety: IM Ex ia I Ma; II G Ex ia IIA Gb. hey can work with an output intrinsically safe circuit ia ia or ib ib of max. parameters: Ui = V, V Ii = A, A Ci = 0, Li = 0. dm /min WK DESCRIION OF OERAION IWZE0-0/00 -N 9 B X Intrinsically safe, proportional, pressure-relief valves type IWZ(, S, G)E0 consist of the intrinsically safe pilot valve type IWZE - the main elements are: body () intrinsically safe proportional solenoid () and control nozzle () and diaphragm (); main valve - with main elements: body (), spool (0), nozzle (); pressure relief valve - with main elements: body (), nozzle (7), poppet (), spring (), adjustment element (). he pressure from port acts on the bottom side of the spool (0) of the main vale, and also through the nozzles system (), (7), (8), (9) on the top side of the spool (0) of the main valve, and on poppet () loaded by the spring () pressure of pressure reducing valve and on diaphragm () connected with the solenoid core (). he strength of diaphragm () to the control nozzle () is proportional to the current intensity flowing through the solenoid (). If the pressure acting on the diaphragm () is higher than set, the diaphragm () is moved and the pressure in the top part of the spool (0) drops. It results in spool (0) lift and opening of the flow from port to. he control stream X is supplied internally. ype IWZ(, S, G)E0, IWZE - - WK 0 0.0

2 DESCRIION OF OERAION At standstill the pressure is equal on both sides of the spool (0). orts and are separated from each other. If pressure in a system reaches the value determined by the position of the adjustment element () and spring () tension of the pressure reducing valve, then the poppet is moved () and the pressure in the top part of the spool (0) drops. It results in spool (0) lift and opening of the flow from port to. In case of power disconnection the switching of the solenoid () is enabled by the manual override (). NOES: he control nozzle () is factory set and its setting shall not be changed (it can cause damage of the valve or system, s where the valve operates). Control pressure (in port ) is the function of the current intensity applied on the proportional solenoid coil (),, only till pressure value set at the pressure reducing valve. In order to set the pressure at the pressure reducing valve the maximum current shall be applied on the solenoid () and by means of the adjustment element ( ) the maximum or other requested working pressure shall be set. ECHNICAL DAA Hydraulic fluid Viscosity range Maxim imum opreat ating pressure Maxim imum flow f Weight Control method Hysteresis ports s, port Maxim imum curre c urrent of f sole s lenoid coil c I max m x 0, A Operating position mineral oil Required fluid f clec leanline ness classc ISO 0 class c 0/8/ Nominal fluid viscosity o 7 mm /s at temperature C Fluid temperature range (in a tank) Ambient temperature range a Resistance of solenoid coil winding at the o temperature 0 C (without semiconductors),8 up to 80 mm /s o o recommended 0 C up to C max o o -0 C up to +70 C o o - 0 C up to +0 C 00 0 dm / min m IWZE0..., kg WM 0 Hz signal < 7% max pressure 0, Ω Degree of pr otecti tection I optional 0 Ma direct drain to the tank t by hose h wit w ith intern ternal l diameter d min. m φ8 valve version IWZGE0... IWZSE0... IWZE...,9 kg, kg, kg COML LIA IANCE WIH HE DIRECIVE 9/9/WE Quality assurance certi ficate Certifica ficate of o f examinati on n type Intri trinsic safety feature 0 FZU No. FZ U 0 AEX X Q 0 KOMA MAG AEX00 007X I M Ex ia I Ma II I G Ex ia IIA I IA Gb WK ype IWZ(, S, G)E0, IWZE

3 INSALLAION AND OERAION REQUIREMENS. Electric connection of the valve must be made according to electric diagram placed on page no.!. Electric conductors for valve connection shall meet requirements applied in the mining machinery.. Only skilled workers can connect or disconnect the valve to / from an electrical system.. During the operation one must maintain the recommended fluid viscosity and required filtration acc. to requirements defined in this Data Sheet - Operation Manual.. In order to ensure safe and failure-free free operation of the valve, the following must be checked on regular basis: condition of the electrical connection operation of the valve cleanliness of the hydraulic fluid. Solenoid plug shall precisely adhere to socket and shall be secured with thread bolt screwed securely in a place. he tightness and suitable clamp of cable in the plug gland shall be ensured. 7. In order to provide tightness of the valve connection to the hydraulic system, one should keep the dimensions of the cavity, sealing rings, tightening torques and valve operation parameters specified in this Data Sheet - Operation Manual. 8. Any valve repair in mining condition is forbidden. A damaged valve must be returned to the producer for repair. he address of service is mentioned on last page of this Data Sheet - Operation Manual. 9. A person that operates the intrinsically safe valve must be thoroughly familiar with this Data Sheet - Operation Manual. WK ype IWZ(, S, G)E0, IWZE

4 DIAGRAMS Hydraulic diagrd agram ams of f valve v ve type IWZ(, I S, G)E0... detailed diagram IWZE simplified diagram B X X Ele lectri tric dia iagram grams of val alves typ ype IWZ(, S, G)E0..., IWZE... versions without LED signalling IWZE0...N...; IWZSE0...N...; IWZGE... N...; IWZE...N... versions with LED signalling IWZE0...NL...; IWZSE0...NL...; IWZGE... NL...; IWZE...NL... plan of solenoid coil electrical connection D D + - R + - D D D D D D D B 0,7A B 0,7A + ( + ) V DC (- ) - + ( - ) V DC - ( + ) ype IWZ(, S, G)E0, IWZE - - WK 0 0.0

5 ERFORMANCE CURVES o measured at viscosity ν = mm /s and temperature t = 0 C Char aracter acterist stic curc urves of f contro trol l pressure in relat ation to currec urrent t inten i tensity controc trolling sole lenoid p [Ma Ma] characteristic curve of control pressure in relation to current intensity p (I) for version IWZE by flow rate Q = 0 dm /mi min p [Ma Ma] ,0 0, 0, 0, 0, 0, 0, 0, I [A] characteristic curve of control pressure in relation to current intensity p (I) for version IWZE by flow rate Q = 0 dm /mi min ,0 0, 0, 0, 0, 0, 0, 0, I [A] characteristic curve of control pressure in relation to current intensity p (I) for version IWZE by flow rate Q = 0 dm /mi min p [Ma Ma] p [Ma Ma] ,0 0, 0, 0, 0, 0, 0, 0, I [A] characteristic curve of control pressure in relation to current intensity p (I) for version IWZE by flow rate Q = 0 dm /mi min ,0 0, 0, 0, 0, 0, 0, 0, I [A] Char aracter acterist stic curc urves of operat ating pressure in relat ation to flow rater characteristic curves of operating pressure in relation to flow ratep (Q) minimal set pressure p in relation to flow rate Q min p [Ma Ma] p [Ma Ma] min,, 0, Q [dm /min / min] Q [dm /min] WK ype IWZ(, S, G)E0, IWZE

6 OVERALL AND CONNECION DIMENSIONS version for subp ubplate mountim ting IWZE0... 0,, O G/8, O , O 0O 9 89, 7 S S, O 8 O - holes O0 - counterbores 78 X O q,, O O7 depth X, 7,, 88 O,7 (max) - holes (A, B) M depth - holes 80 r 0,0/00 0, 8 - Sealing ringo-rin -ring 7, x, - pcs /set (, ) - Sealing ringo-rin -ring 8, x, - pcs /set (X) - Locating pin - lug Hir irschm chman ann G KW F type - Manual override - orting pattern of the subplate surface compliant with N - ISO standard; designation N - ISO (CEO R0); fixing screws M x acc. to N - EN ISO 7; pcs /set; tightening torque Md = 0 Nm 7 - Leakage drain port * 8 - Subplate surface required NOE: (*) - or ort sha hall be direc irectly conn nnec ected ed to tan ank with a hose with interna ernal dia iame meter er min. m φ8 in depre presuriz urized cond ndition ype IWZ(, S, G)E0, IWZE - - WK 0 0.0

7 OVERALL AND CONNECION DIMENSIONS version for cartrc artrige mountim ting IWZSE0... 0,, O G/8, O 89, 9, 9 0 O S S, O 8, 0 O8, - holes 8 X O q O 9 7, Sealing ringo-rin -ring 7, x, - pcs /set - Sealing ringo-rin -ring 9, x,78 - pcs /set (X, ) - Back-up ringe 8, x x 0,8 - lug Hir irschm chman ann G KW F type - Leakage drain port * - Manual override NOE: (*) - or ort sha hall be direc irectly conn nnec ected ed to tan ank with a hose with interna ernal dia iame meter er min. m φ8 in depre presuriz urized cond ndition WK ype IWZ(, S, G)E0, IWZE

8 OVERALL AND CONNECION DIMENSIONS version for cartrc artrige mounti m ting IWZSE0... cavity - v, 0v X O0 OH7 A O8, +0, B, e 0,008 ao 0,0 B 0, n 0,0/00 0,0 A 7 O0,, 0 u0, r +0, +0,0 8 - v O (min) M O O0 O, ±0, u0, 0 ±0, ±0, X ±0, M8 depth holes ±0, M depth - Mounting holes configuration of cavity face surface; fixing screws M8 x acc. to N - EN ISO 7 - pcs /set tightening torque Md = 7 Nm - Nozzle φ0, 0, ype IWZ(, S, G)E0, IWZE WK 0 0.0

9 OVERALL AND CONNECION DIMENSIONS version for thret hreaded mounti m ting IWZGE0... O G/8 O 89, 0,,, 09 9, O 0 S S, O G / 8 O 9 counterbores ports (A, B) O9 holes 8 8 O q O 9 0, 97 - lug Hir irschm chman ann G KW F type - Leakage drain port * - Manual override NOE: (*) - or ort sha hall be direc irectly conn nnec ected ed to tan ank with a hose with interna ernal dia iame meter er min. m φ8 in depre presuriz urized cond ndition WK ype IWZ(, S, G)E0, IWZE

10 OVERALL AND CONNECION DIMENSIONS pilot t valve v ve - version IWZE... 0,, O G/8 8,, 0 0, 0,7 O9, - counterbores O, - holes, B O q , 97 (min),,7,,,9 0,7 0, B A* 9 7,8 * 0, (min) r 0,0/00 0, - Sealing ringo-rin -ring 9, x,78 - pcs /set (, A*, B, ) - lug Hir irschm chman ann G KW F type - orting pattern of the subplate surface compliant with ISO 0-0 standard; designation ISO (CEO 0); fixing screws M x acc. to N - EN ISO 7; pcs /set; tightening torque Md = 9 Nm - Leakage drain port ** * - Subplate surface required - Manual override NOES: (*) - Connection element not used by pilot valve - IWZE version (** **) - or ort sha hall be direc irectly conn nnec ected ed to tan ank with a hose with interna ernal dia iame meter er min. m φ8 in depre presuriz urized cond ndition ype IWZ(, S, G)E0, IWZE WK 0 0.0

11 HOW O ORDER Valve version valve for subplate mounting = IWZE valve for threaded mounting = IWZGE valve for cartridge mounting = IWZSE pilot valve = IWZE * Nominal size (NS) complete valve - NS0 = 0 pilot valve - NS = Series number (0-09) - connection and installation dimensions unchanged = 0X series 0 = 0 Settable pressure range up to Ma = 0 up to 0 Ma = 00 up to0 Ma = 00 up to 0 Ma = 00 Solenoid coil coil for supply voltage U = V DC; current I max = 0, A = Manual override solenoid with manual override = N Solenoid supply signalling without LED indicator = no designation with LED indicator = L ilot oil drain drain via independent port Sealing NBR (for fluids on mineral oil base) FKM (for fluids on phosphate ester base) = = no designation = V Further requirements in clear text (to be agreed with the manufacturer) NOES: he valve should be ordered according to the above coding. he symbols in bold are the preferred versions available in short delivery time. Coding example: IWZE0-0/00 - N ype IWZ(, S, G)E0, IWZE - - WK 0 0.0

12 SUBLAES AND FIXING SCREWS Subplates for version IWZE0... must be ordered according to data sheet WK Subplate symbols: G0/0 - threaded connections A, B - G /8; X - G/ G07/0 - threaded connections A, B -G/; X -G/ NOE: he sub ubpla late symb ymbol in bold is the preferred erred vers ersion avai aila lable le in shor ort delivery ery tim ime. Subplate andfixing screws M x 0-0, 0,9 according to N - EN ISO 7 - pcs /set must be ordered separately. ightening torque Md = 0 Nm EXAMLE OF ALICAION IN A HDRAULIC SSEM IWZ E X M ONAR Wadowice S.A. ul. Wojska olskiego 9-00 Wadowice tel fax WK ype IWZ(, S, G)E0, IWZE