Pfeiffer AT Actuator Pneumatic Rotary Actuator Type SRP ...

1 Application Single or double acting piston Actuator for butterfly valves andother final control elements with turning throttling elementsMaximum opening angle = 90 The types SRP and DAP Pneumatic Rotary Actuators are pistonactuators for throttling or on-off features Travel stops externally adjustable ( 4 %) Square-end position either diagonal (European standard) orparallel Freely adjustable position indicator (in 45 steps) No special tools needed for mounting and conversion Variety of spring cartridges Power transmission without clearance due to involute serra-tions Direction of rotation reversible without using additional com-ponents Surface treatment using a special methodAttachment of positioners, limit switches, solenoid valves andother accessories according to VDI/VDE 3845. Designed for signal pressures of up to 8 bar and for continuousoperation at temperatures between 20 and +80 C Versions Type SRP ( ) Pneumatic Rotary Actuator , single actingwith spring-return mechanism in sizes 15 to 5000 Type DAP Pneumatic Rotary Actuator , double acting with-out spring-return mechanism in sizes 15 to 5000 Further versions With manual override For continuous operation at temperatures from 20 to150 C using Viton O-rings or For continuous operation at temperatures from 40 to 80 Cwith silicone gasketsFig.

2 1 Pfeiffer Type AT Pneumatic Rotary ActuatorPfeiffer AT ActuatorPneumatic Rotary Actuator Type SRP and Type DAPE dition April 2000 Data SheetT 9929 ENPrinciple of operationThe signal pressure pst exerts a force at the piston surface whichis balanced by the springs arranged in the Actuator in thesingle-acting version and by a corresponding counterpressurein the double-acting version. The pinion shaft converts the force created at the pistons into arotary motion. Adjustable travel stops for the OPEN andCLOSED position allow a fine adjustment of the final position by 4 .In the single-acting version, the number of springs determine thereturn spring torque and the loading pressure required. Fig. 3 shows the useable air-driving torques MdLE for single-acting version MdLD for double-acting version as well the useful spring-driving torque MdF dependent on theangle of rotation .Fail-safe position There are two different Rotary motions in the Type SRP Actuatorwhich become effective when the pistons are relieved of press-ure or when the supply air fails.

3 The following applies whenlooking at the valve from the Actuator . "Springs turn clockwise", A clockwise motion is made when the pressure is reduced."Springs turn counterclockwise", A counterclockwise motion is made when the pressure is Type DAP Actuator is designed without springs. A definedfinal position is not achieved when the supply air following details are required on ordering: Actuator typeDAP .. or SRP .. Nominal size15, 30, 60, 100, 150, 220, 300, 450, 600, 900, 1200, 2000, 3000 or 5000 Number of springsOnly applies to single-acting Type SRPFail-safe positionSprings turn clockwise or counterclockwise (only applies to single-acting Type SRP) Supply bar Operating rangeNumber of springs or bench rangeVDI/VDE bracketFor attachment of positioner or signaling devices Fig. 2 Sectional view of Type AT Pfeiffer 100%66%33%0 90 MdLEMdFMdLD0%Fig. 3 Torque curve at recommended supply pressure T 9929 EN2 Table 1 Technical data Actuator versionSingle actingDouble actingMax perm.

4 Signal pressure8 barSizes15 30 60 100 150 220 300 450600 900 1200 2000 3000 5000 Perm. temperaturesIn continuous operation 20 to 80 C Connection point to valveEN 12116/DIN 3337 Connection point for positioner orsignaling devicesType 15 to 150 VDI/VDE 3845, size 1 Type 220 to 450 VDI/VDE 3845, size 3 Type 600 to 5000 VDI/VDE 3845, size 4 Connection point for pilot valvesVDI/VDE 3845 Table 2 MaterialsBodyWN F25 CoverWN GD-AlSi8 Cu3 ShaftWN C22/stainless steelCompression spring cartridgeASTM A 401 54 Si Cr6 PistonWN GD-AlSi8 Cu3 Table 3 Torque for double acting Type DAP ActuatorsTypeDAPT orque in Nm at a supply pressure bar3 bar4 bar bar5 bar6 bar7 bar8 9929 EN3 Table 4a Torque in Nm for single acting Type SRP Actuators Supply pressure to barTypeSRPS prings/sideTorque in Nm at a supply pressure ofSpring bar3 bar4 bar0 90 0 90 0 90 0 90 0 90 90 0 2 1891262/32251463012233782994553764854062 3715831939927017534625242332945435928419 03/4 2381283152053912814223123322214

5 2831573602343902643792531200236228046838 65744936815997236412521702/3319217426323 5324306385366815783152133277154383260489 3675964736385153782553/42349134119744730 4553410596453441298419228298134404241511 3475533905043402000263548881867110018541 1841037125711104272792/35653817485649317 4711149301187100353434934962746794578626 40104482311188966404193/4426168609351792 5349757171048790747489435661539244722427 9056109786838545593000286165611209151380 117516391434174215386414362/375149610117 5512701015152912741633137880154636423369 02595116185414201114152412179616553/4534 1767934351053694131295414151057112176444 2415683275943534120279313068971281873500 0215111089196515432419199628722450305426 3211807582/31322794177512472229170126832 1552865233714759483113249915869522040140 62493186026752042177111373/4943203139665 7185011112304156524861746206613274753921 2073621661816211412702296145123611516 - indicates recommended symmetrical sizingT 9929 EN4 Table 4b Torque in Nm for single acting Type SRP Actuators Supply pressure to 8 barTypeSRPS prings/sidesTorque in Nm at a supply pressure ofSpring bar5 bar6 bar8 bar0 90 0 90 0 90 0 90 0 90 0 90 90 0 1235215179179107206135317245198126450423 3159260185303229347272390316564490206132 4/52171332431592872033302463742905474642 3214852011082271342701773142213572645314 382581655/618482210108254151297195341238 5154122831816 1948223712628116932421349838630919860042 9721133124538830244435850141572864226618 04/5275178309212365268422325479382706609 2992025252244286178343235400292456349683 5753322245/62302113092123202023772594343 156615423652476 2411122981693552254112826385093992699004 3902644363105133875894646665409728463792 534/535921744232451940059647767255497886 04262855 3732164502925263696034459097524743165/6 4182454953215713988777045213486

6 4632745403518466575683791200455339061745 3723560830666936772136211985043404/55113 2757539068149778760389470913191135567383 5468264532327638434745540851646127710726 304255/642620148926459637170247780958312 3410096934686 4472015533086604147665201192946756510200 0497868310887931271976145411591637134223 6820738545594/59085761018686120186913841 0521567123522981967960629583847094857911 317621314945149711282229186010676985/676 8363878473106165612448391427102221591753 11747686 8083669915491174732135791520891647128183 8300041306897146110531721131219801571223 91831 12818734/5119773713528931612115218711411 2130167131682708144298251088577124573215 04992176312512023151030602548160210915/6 9794171136572139583216541091191413502951 2388176212006 1027412128667115459311805119028422228192 2130950004229614512568172430222177347626 313930308557454900236115164/521061156237 9142928331882328623363740279055554605265 6170651917861218911332643158730972041355 1249553664310295118955/61717566200083824 541292290717463361220051764015324620856 1810543226499727181451317219054987372035 412274 - indicates recommended symmetrical sizingT 9929 EN5 Table 5 Dimensions in mm and weights for Type SRP and Type DAP ActuatorsType153060100150220300450600900 1200200030005000 ISO flangeF04F05F05F07F07F10F10F12F12F14F14F 16F16 OnrequestSquare end11141417172222272736364646T-ISO 2281 8 1 8 1 8 1 8 1 4 1 4 1 4 1 4 1 4 1 4 1 4 3 8 1 2 5x8M 5x8M 5x8M 5x8M 5x8M 5x8M 5x8M 5x8M 5x8M 5x8M 5x8 M 6x10 M 1)364250507070102102102140140165165Q1 1)42507070102102125125125 1)R32323232323232323232324545S2424242424 2424242424244040W 1)M 5M 5M 6M 6M 8M 8M 10M 10M 10M 16M 16M 20M 20W1 1)M 5M 6M 8M 8M 10M 10M 12M 12M 12 1) -d f8 2)

7 303535555570708585100100130130hmax 2) -Z404040404056/65 56/65656580/115 80/115115115 Weight in 2 req. 1) Versions C, D, E, P only have one flange2) On requestANMHPG Z4 XFOBBLCC4 LDA/SR3000M5xEM6x12 DRS d Qhh145 45 Square end W W1NM Q1 Fig. 4 Dimensions and connection points to valvesConnections"2""4""T"T 9929 ENSAMSON AG MESS- UND REGELTECHNIKW eism llerstra e 3 D - 60314 Frankfurt am MainTelefon (0 69) 4 00 90 Telefax (0 69) 4 00 95 07 Internet.