Masoneilan™ 31000 Series 

Reliability

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.

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. 

Ease of Maintenance

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

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, backed-up by a double O-ring follower to provide
further reliability in corrosive applications.