Spring energized seals/spring loaded seals

Spring energized seals is a sealing device consisting of a PTFE or other polymer, energized by a corrosion resistant metal spring.  When the seal is seated in the gland, the spring is under compression applying force on the gland sealing surfaces thereby creating a tight barrier to prevent gas or fluids from leaking.  The spring also provides resiliency to compensate for seal wear, gland misalignment or eccentricity.  While spring force provides adequate force for sealing at low pressure, at high pressure the system pressure augments the spring force to provide an even tighter seal.  The PTFE Spring energized seal are precision machined from PTFE, filled PTFE and other high performance polymers.

PTFE spring energized seal consists of a U-shell and a corrosion resisting V-spring single action seal applying to slow/medium speed reciprocating or slow speed rotary movement occasions including the hydraulic cylinder or cylinders. These PTFE seals are an excellent alternative for extreme conditions where conventional elastomeric seals cannot be used. They're highly effective for corrosive media, extreme temperatures and high surface speed applications. Spring energized seals are frequently employed with petrochemicals, extreme temperatures, in corrosive fluids and high duty cycles.

II. The different shape of springs

Cantilever Spring (Finger Spring):

A cantilever spring is recommended for dynamic, medium load applications where low friction is desired. The V-shape spring provides constant compression load and is further energized by system pressure.

Helical Spring:

A helical wound spring is made from a metal ribbon, which is coiled into a helix. The spring compresses radially producing a very high load versus deflection. The helical wound spring is preferred for static applications or applications where sealability is more of a concern than friction.

Slanted Coil Spring:

A slanted coil spring, also known as a canted coil spring, is manufactured from a round wire that is coiled and angled. The process creates a compression force in the radial direction. The canted coil design is suited for dynamic applications where low friction is critical.

III.Material 

Spring: Stainless steel 301/302/304/316/Hastelloy/Inconel/Elgiloy

IV.Product Application:

Aerospace industry, biological and chemical equipment, semiconductor objects, the Food and Drug, mechanical vacuum parts, petrochemical industry, in pieces to make moving slide bearings, valve seats, piston rings and other parts.Valves, Pumps, Separators, Actuators, Dosing devices, Fluid system,  Hydraulic system, Pneumatic system, Oil or grease media sealing, Water edia sealing, Automobile, motorcycle, industry, agricultural machinery,

truck, buses, trailers, exercise equipment.