1、 Introduction to Spring Activated Sealing Ring

Spring actuated PTFE seal is a high-performance seal with a U-shaped PTFE inner assembly and a special spring. By applying appropriate spring force and system fluid pressure, the sealing working lip is pushed out and gently pressed against the sealed surface to produce an excellent sealing effect. Its sealing working lip has the best short and thick characteristics, thereby reducing friction and extending lifespan.

Polytetrafluoroethylene is a sealing material with excellent chemical resistance and heat resistance, which can be applied to the vast majority of chemical fluids, solvents, hydraulic oils, and lubricating oils. Its compression deformation is very small, so it can exert sealing performance for a long time.

The temperature range can be from refrigerant to 300 ℃, the pressure can range from vacuum to ultra-high pressure of 700kg/cm2 (about 70MPa), and the moving speed can reach up to 20m/s. Springs can be selected from stainless steel, corrosion-resistant alloys, etc. according to different usage environments, so they can be applied to various high-temperature corrosive fluid situations.

Wing Nian can produce spring coils with an outer diameter of 1.5mm to 1.5m, and existing customers are currently using 1.5mm spring coils.

2、 Main applications

Typical applications are as follows:

☆ Axial seals for rotating joints of loading and unloading arms

☆ Sealing components for spray painting valves or other spray painting systems

☆ Sealing components for vacuum pumps

☆ Sealing components for beverages, water, beer, equipment (such as equipment valves), and food industry

☆ Hydraulic cylinder rod seals are the best replacement, especially suitable for applications with high pressure, high lateral load, high speed, low friction, and large rotational deflection

☆ Sealing components for dynamic and static applications of petrochemical and equipment

☆ Seals for automotive and aviation industries (low friction, long service life)

☆ Seals for other industrial equipment or pressure vessels

3、 Advantages of Spring Activated Sealing Rings

The sealing performance is not affected by insufficient lubrication during startup

☆ Effectively reduce wear and friction resistance

By combining different sealing materials with springs, different sealing forces can be demonstrated to meet various application needs

☆ Made with specialized CNC machining machinery, no mold cost - especially suitable for a small amount of diverse sealing rings

☆ Chemical corrosion resistance and heat resistance are far superior to commonly used rubber sealing rings, with stable dimensions and no degradation of sealing performance caused by volume deformation or shrinkage

☆ Exquisite structure, can be installed in standard O-ring grooves

☆ Significantly improve sealing ability and service life

☆ The sealing ring groove can be filled with anti pollution material

☆ Due to the sealing material being PTFE (polytetrafluoroethylene), it is very clean and will not contaminate the process

☆ Extremely low friction coefficient, no hysteresis effect

☆ Low starting friction resistance, even with long downtime or intermittent operation, can maintain low starting power performance

4、 Style of spring actuated sealing ring

Spring actuated sealing rings can be designed with V-shaped or H-shaped spring forms and sealing lips according to various application scenarios such as dynamic, static, internal and external pressures, thus exhibiting different sealing forces and compressible deformations.

The magnitude of spring force will affect the sealing performance, friction, and wear behavior of the spring actuated sealing ring; The compressibility of the spring determines the compensation ability of the spring actuated sealing ring for seal lip wear and seal groove size tolerance variation.

Characteristics of V-shaped spring actuated sealing ring

☆ V-shaped spring activated polytetrafluoroethylene seals are used for static and reciprocating sealing applications

☆ The thickness of the dynamic sealing lip increases, giving it a longer service life

This sealed structure reduces the contact area on the dynamic sealing surface, thereby reducing friction

☆ Temperature resistance range: -150 ℃ to 260 ℃

The standard model is suitable for pressures ranging from vacuum to 210 kg/cm ², while the addition of a special shaped backing ring can withstand pressures up to 700 kg/cm ²

Application scenarios

☆ Shaft and piston seal of reciprocating mechanism

☆ Rotary shaft seal, with a speed of up to 4M/s

During static sealing, the sealing groove can tolerate larger tolerances and poor alignment

☆ Surface sealing is suitable for application environments with internal or external pressure

☆ Dynamic sealing is suitable for temperatures up to 260 ℃

Characteristics of H-type spring actuated sealing ring

☆ High spring constant, suitable for medium and high load applications

☆ The average force on each coil of the spiral spring

☆ Can replace standard British O-ring without modifying groove size

☆ Stainless steel spring, or corrosion-resistant alloy can also be selected

☆ Temperature resistance range: -150 ℃ to 300 ℃

The standard model is suitable for pressures ranging from vacuum to 210 kg/cm ², while the addition of a special shaped backing ring can withstand pressures up to 700 kg/cm ².

Not suitable for sealing grooves with large tolerances and poor alignment

Application scenarios

☆ Static shaft and piston sealing

☆ Slow dynamic sealing occasions, with speeds below 3 mpm

☆ Sealing of internal and external pressure surfaces

☆ Sealing of vacuum and refrigerant