Brochure

Digester Liquor Level Control
Continuous digester liquor level control is a critical and demanding application. The liquor level is critical to digester operational stability,
providing correct throughput, and reducing kappa variation (lignin measure in the pulp). Found in the make-up liquor line after the make-up
liquor pump, the control valve controls liquor flow to the top of the impregnation vessel in a two vessel system.
The valve is subjected to cavitation, flashing, erosion, scaling, vibration, and noise issues.
Product Solutions
Fisher
®
Pulp and Paper Solutions | 11
Cooking
n MAXIMUM FLOW CONTROL V-notch ball contouring provides modied equal percent characteristic for maximum
ow control.
n INCREASED THROUGHPUT Unrestricted, straight-through ow design provides greater capacity.
n TIGHT SHUTOFF Self-centering seat ring and rugged V-notch ball allow for tight shutoff.
n REDUCED DOWNTIME Rugged seat ring has two shutoff surfaces that are easily reversed, reducing downtime.
n ANTI-SCALING Cammed Vee-Ball design reduces effects of scaling.
Cooking
Fisher CV500 control valve, 1061 actuator and FIELDVUE DVC6200