Products / Parker / Seal and O-Rings / Head Seal Praedifa Series NLA, FlexiSeal®
Symmetric head seals design. FlexiSeal. Spring-energized PTFE seal.
The NLA product series is a FlexiSeal® design
with a cantilever spring. It is ideally suited for static
applications requiring greater flexibility of the seal cross-section
(spring travel) due to higher coaxiality fluctuations between the
rod and groove or due to excessive expansion and contraction
(“breathing”). It is characterized by extremely high temperature and
chemical resistance. NLA may also be used for dynamic applications
(internal and external).
• Symmetric lip design.
• Cantilever spring for low load / high compliance behaviour.
• Many high-resilience energizer options available, including choice
of light, medium and heavy loads and NACE for oil field use.
• Available with silicone filling for food and drug applications.
• Allows the integration of a stand-off ring to protect the sealing
lips in case of reverse pressure.