1
1.
Product instruction
1.1 Summary
QBR3~QBR5 are quarter-turn electric valve actuators (hereinafter referred to as Electric actuator)
invented by our Company. ThisseriesareclassifiedintoQBR3, QBR4, QBR5 according to the seating
numbers. Control torque ranges from 600 Nm to 12000Nm. This series can be operated with ball valve,
butterfly valve whose disc can make a 90°turn, combining an electric valve actuator which controls valve
open and close. Both single unit control and collective-remote control can be realized. Remote electric
control and manual operation, electric operation on site can also be realized. This series can be largely
applied in pipe and valve industrial field.
This explosion-proof grade for the explosion-proof type product (with Ex) is ExdIIBT4Gb.
1.2Technicalparameters
1.2.1
This product is in accordance with GB/T24923-2010
《
Technical Conditions of Basic Type of Electric
Actuator
》
, and GB/T24922-2010
《
Technical Conditions of Explosion-proof Type of Electric Actuator
》
.
1.2.2 Power supply: 380V, 50Hz, 3-phase 4-wire system, sine AC; 380V, 50Hz, 3-phase 3-wire system,
sine AC (For special voltage and frequency, please refer to product’s nameplate and contract.).
1.2.3 Protection class: IP67.
1.2.4 Ambient temperature: -20
～
+70
℃
.
1.2.5 Relative humidity: be up to 90%
（
when at 25
℃
）
.
1.2.6 Altitude: be up to 1000m.
1.2.7 Short-time duty: 10mins (rated time).
1.2.8 Applicable working environment: for basic type, no severe vibration and no strong corrosive medium
and explosive mixed gas in the operating environment; for explosion-proof type, no strong corrosive
medium.
1.2.9 Electric port: total number of M33
×
1.5 is 2;
1.3Majorstructureandfunction:
1.3.1 Motor: YDF specialized electric valve motor. This kind of motor complies with
relatednationalstandardanditstorqueperformancecomplieswithvalve’sloadingperformance.
1.3.2Reducermechanism: it applies first-class spur gear, first-class worm gear, and first-class NN type
planetary reducer.
1.3.3Limitcontrolandpositionindicator: this mechanism is led by out put shaft(90°turns),limit cam,
pointer(90rotationinonetravel) .Potentiometerisusedtocontrolremoteelectricalsignal,applyingstep-upgearingt
otransfer.(RefertoFig.1)
1.3.4 Torque control mechanism: it controls the valve according to the output torque set by the electric
actuator, both in valve open and close direction. Torque signal comes from a axial movement from which
electrical worm compresses belleville spring. Torque switches are made of cams.(see Fig.2)
1.3.5 Manual operation mechanism: manual-electrical switch is automatic. To turn the handwheel while in
manual operation without switching. Due to QBR5 outputs a big torque value, to add a NGW planetary
reducer on the manual worm so as to minimize the handwheel’s force.
1.3.6 Spline joint head: one of QBR serial feature is that spline joint head is mounted in the output shaft,
which is suitable for the electric actuator to mount on valve in multi-angle. It is easy to be removed and it
can assist the processing of the stem’s key slot. The spline joint head is suitable for the mounting of valve
and quarter-turn electric actuator which has mechanical limit output shaft. (The output shaft of this series
has mechanical limits both on open and close position.)
1.3.7 Local control buttons: local control buttons, at one side of the handwheel, are responsible for
