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