Masoneilan 31000 Series Rotary Control Valve


The 31000 Series control valve is a PFA lined, eccentric plug control valve for corrosive applications which incorporates the following features:

Excellent Performance:

The eccentric rotary plug design provides excellent throttling control accuracy, low dynamic forces and tight shut off. The straight through flow pattern results in high flow capacities.

Reduced Fugitive Emissions:

The rotary design inherently reduces wear on the packing as compared to a typical linear valve. Additionally, the standard design includes PTFE/Graphite packing, chevron rings, backedup by a double O-ring follower to provide further reliability in corrosive applications.


  • Size: 1" through 3" (25 through 80 mm)
  • Ratings and Connections : Flanged ANSI 150, UNI-DIN 10 – 16
  • Body Materials :Cast iron PFA lined
  • Actuators :Model 35 spring-opposed rolling diaphragm
  • Trim :Eccentric rotary plug
  • Inherent Characteristics :linear

Ease of Maintenance:

The compact dimensions and low weight design allows for easy installation and removal without compromising piping forces.


The dovetail grooves provide mechanical anchoring between metal body and PFA lining to ensure high performance under vacuum and at high temperature. The powerful, field proven rolling diaphragm actuator provides positive fail-safe action. The actuator linkage is totally enclosed that comes with a combination handwheel and adjustable limit stop with locking mechanism. All actuators are available with a complete line of options and accessories.

Applicable Industrie

Chemicals, Petrochemicals, Pulp/Paper.

Key Applications :

Distillation, Hydroprocessing, Reforming, Cracking, Secondary, Blending, Quenching and Fractioning, Charge Gas Compression, Seperation.


Masoneilan 31000 Series in ValvFAST Program - Flyer

Tech Spec/Fact Sheet 712.95 KB

Masoneilan 31000 Rotary Valve Manual (English)

Manuals 1.73 MB

Masoneilan 31000 Rotary Valve Tech Spec (English)

Tech Spec/Fact Sheet 1.01 MB

All Products

Masoneilan 31000 Series Rotary

Rotary Control Valves

Masoneilan 35001 Series Camflex Rotary

Rotary Control Valves

Masoneilan 36005 Series V-Max Ball

Rotary Control Valves

Masoneilan 37002 Series Minitork II Butterfly

Rotary Control Valves

Masoneilan 39004 Series High Performance Butterfly

Rotary Control Valves

Masoneilan 33000 Series Triple Offset Butterfly

Rotary Control Valves