Masoneilan* 31000 Series Rotary Control Valve


The 31000 Series valve features a PFA-lined assembly offering corrosion resistance for corrosive fluid applications at a lower cost compared to high alloy options. It also includes an eccentric rotary plug design that offers tight shut-off at a high 100:1 turndown ratio and low dynamic forces for excellent throttling control. 




Features & Benefits

• Complete PFA or solid PTFE encapsulation of all metal components shields against chemical corrosion for long service life in harsh chemical environments
• Eccentric plug design drastically reduces seal friction, reducing actuator sizes for extended seat life, fewer maintenance requirements and increased process yields
• Eccentric plug action offers accurate control and tight class VI shut-off
• Standard low-emission packing system offers compliance with environmental and safety requirements
Application :

The Masoneilan 31000 Series valve’s corrosion-resistant construction make it an excellent solution for many challenging applications including:


• Acids

• Chlorine

• Chlorine Dioxide

• Bromine

• Waste water treatment

The 31000 Series rotary control globe valve’s design features offer durability and performance in harsh chemical applications:
• PFA-lined metal components
• Eccentric plug design
• Standard low-emission packing system for reduced environmental impact



1" through 3" (25 through 80 mm)


Ratings and Connections: 
Flanged ANSI 150, UNI-DIN 10 - 16


Body Materials: 
Cast iron PFA lined


Model 35 spring-opposed rolling diaphragm


Eccentric rotary plug


Inherent Characteristic: 






• Reduced trim