Throttles type ED Restrictor check valves type RD …

1 Throttles type EDRestrictor check valves type RD and RDF/..D 7540 Restrictor check valve ED, RDMarch 2009-00 HAWE HYDRAULIK SESTREITFELDSTR. 25 81673 M 1987 by HAWE HydraulikOperating pressure pmax= 500 barFlow Qmax= 130 valves belong to the flow valve group (ISO 1219-1). They are used in hydraulic systems as resistance valves . This effect isbased on the intentional utilization of the variable |p-Q-characteristic. The flow resistance can be regulated very precisely with both the manually and the tool adjustable version.

2 Size 11 and 21 of typeED (RD) are basically designed as slot-type Throttles , where the cross section is extended by an annular gap only for the last quarter of the stroke in the range of the greatest opening. Size 31 to 51 of type ED (RD) are pure annular gap Throttles . The non-adjustable version is a orifice type throttle. The check valve is designed as a tilt plate with a low mass, a spring is omitted (no malfunction due to a broken). The valve opens and closes with the slightest fluid flow.

3 The adjustment spindle is nitrided (making it wear resistant) and is permanently lubed by the hydraulic fluid (maintenance free).Type and adjustmentAdjustment spindle (coding K)tool adjustable (pin)Annular throttling area, betweenthe edge of the bore and the taper (hardened)Annular throttling area, between theedge of the bore and the taper (hardened) check valve disc:closed position (flow via throttle)Open position (free flow)Fixture screw for check valve, actingadditionally as stop for the spindle(prevents the spindle to be screwedout too far)RDF 11: Orifice.

4 21: Orifice .. secured by liquid screw lockRDF 31 to 51: Orifice disc # .. fixture screwType and checkvalveRestrictor check valvewith fine throttleD 7540 page 2 Table 1: Basic type, sizeTable 2: Fixed throttle RDF ../..Version#(mm)CodingRDF 11/..RDF 21/..RDF 31/..RDF 41/..RDF 51/.. ,40,50,60,81,0 1,21,41,61,82,02,53,03,54,04,55,05,5'''' '''''Orifice M 4 x ..'''''''''Orifice M 5 x ..'''''''''''''''''''''''''''''''''''''' ''CodingPorts F and Gconf. ISO 228/1(BSPP) Pressurepmax(bar)Flow Qmax(lpm)Mass(weight) approx.

5 (g)ThrottleED 11ED 21ED 31ED 41ED 51RD 11, RD 112RD 21RD 31RD 41RD 51 RDF 11/..RDF 21/..RDF 31/..RDF 41/..RDF 51/..G 1/4G 3/8G 1/2G 3/4G 1G 1/4G 3/8G 1/2G 3/4G 1G 1/4G 3/8G 1/2G 3/4G 1123060801301230608013012306080130180220 3506608401802203506608401802203506608405 00500500 Restrictorcheck valveF G throttling inboth flow directionsF G free flow F G throttled flowwith fixed throttleF G free flowF G throttled flowOrifice disc with fixture versions, main dataOrder examples:RD 11 Throttle(manually adjustable)ED 31 KThrottle(tool adjustable)RDF 21/1,0 Restrictor check valveAdjustability (only type and !)

6 No coding = manually adjustable (wing screw / lock nut)K= tool adjustable (adjustment spindle / lock nut)Note: The throttle characteristic of type RD 112 is more fine than with type RD 11, see curves in sect. 3D 7540 page parametersInstalled positionAnyHydraulic fluid:Hydraulic oil conforming DIN 51524 table 1 to 3 (ISO VG 10 to 68 conf. DIN 51 519) Viscosity range: min. approx. 4; max. approx. 1500 mm2/sOptimum: 10 to 500 mm2/sAlso suitable are biologically degradable pressure fluids type HEPG (Polyalkylenglykol) and HEES(synth.)

7 Ester) at operation temperatures up to approx. +70 : approx. +80 CFluid: +80 C, pay attention to the viscosity range! Start temperature down to -40 C are allowable (Pay attention to the viscosity range during start!),as long as the operation temperature during subsequent running is at least 20K higher. Biologicaldegradable pressure fluids: Pay attention to manufacturer's information. With regard to the com-patibility with sealing materials do not exceed +70 C.|p-Q curvesThrottling direction G F with type (K) and (K)Back pressure|p (bar)Back pressure|p (bar)Flow Q (lpm)Flow Q (lpm)Throttling direction G F with type flow F G with typeRD(F) 11 to RD(F) 51|p,3 bar at approx.

8 Qmax|p,8 bar at approx. QmaxFor Qmaxsee main data in table 1, sect. 2 Attention:The Throttles show a certain viscosity dependence, the |p-Q curves can differ more or less strongly when usedbeyond the optimal viscosity duringmeasuring approx. 54 mm2/sType ED 11, RD 11 Type RD 112 Type ED 21, RD 212 turns1 turncompl. pressure|p (bar)Flow Q (lpm)2 turns1 3/4 turns1 1/2 and ED (41, 51) and ED and ED (51)compl. open RD and ED and ED and ED RD (41, 51) and ED (41, 51)RD and ED 31RD and ED 41RD and ED 51compl.

9 Open2 turns1 turn1 turn1/4 turn1/8 turn1 1/4 turnsD 7540 page dimensionsAll dimensions in mm, subject to change without notice!Type and RDF ../..Type 11(K), RD 11(K), RDF 11/..ED 21(K), RD 21(K), RDF 21/..ED 31(K), RD 31(K), RDF 31/..ED 41(K), RD 41(K), RDF 41/..ED 51(K), RD 51(K), RDF 51/.. 1/42 1 1/4G 3/8G 1/2G 3/4G 1 TypeLHH1hDBa/fa/f1 Adjustmenttravel s F and GISO 228/1(BSPP)