Rotork Type K rotary pneumatic damper drive JR Series
JR Series

- Detailed introduction
- Need a Quote?
Rotork Type K rotary pneumatic damper drive JR Series
The JR Series was designed specifically for wall-fired boilers with burners using a combination of fuel and combustion air. The JR Series controls the secondary air that is introduced at the burner and the air/fuel ratio is regulated by a sliding-sleeve damper to balance the air flow distribution. The JR Series offers ‘split architecture’ with the Power cylinder and the DPC-777 positioner mounted separately to remove sensitive electronics from the high-temperature area around the boiler and burner.
Power cylinder:
High-temperature rated Linear Position Transducer (LPT) feedback to DPC-777
100% duty cycle, rated for continuous modulating service
4” diameter thrust rating 1,178 lbf. (5,240 N) at 100 psi
5” diameter thrust rating 1,885 lbf. (8,385 N) at 100 psi
6”, 12” and 18” stroke lengths, digitally adjustable
Rated for +300 °F (+149 °C) ambient environment
Fail-in-Place of field selectable to fail-extend or fail-retract
DPC-777:
Digital position controller accurate to +/- 0.5%
Push button calibration
Direct or reverse acting, field selectable
Limit switch and continuous position feedback options
4 to 20 mA, 1 to 5, 0 to 5 or 0 to 10 VDC input
Options:
Reset and local / remote pushbuttons for manual control
End position feedback alarm switches
Continuous analogue position feedback