FJSEALS is capable to develop a large variety of composite materials that can meet the valve and cylinder sealing requirements under various demanding operating conditions. These materials are tested and validated through specific operating condition simulations to ensure their effectiveness. We specialize in manufacturing various types of spring-energized seals and O-rings. Based on the specific operating conditions and parameters you provided, we can produce products that meet your requirements and expectations.
Outer diameter
≤2600mm
Operating temperature
-196℃~300℃
Pressure
0~150Mpa
Media
Liquid, gas
Please
contact us
for customization if you have other requirements.
Customization process
Engineered seal design Performance-critical seal solutions and components require precise designs and seal engineering to meet your application requirements.
Material test and polymer analysis FJSEALS is equipped with in-house seal material testing to ensure operating specifications of your material choice will meet the application requirements of your project.
Quick prototyping Our design and manufacturing team is capable to rapidly bring your custom seal designs into prototype outcomes. We offer design services in a 2-3 business day. Prototypes production is completed within a week or less, and orders can be fulfilled within 10 business days.
Special customization
Seal failure analysis
We can help you identify the underlying causes of your seal failures and propose changes and seal designs that meet or exceed your operating parameter specifications.
Reverse engineering seal design
Is your seal solution out of stock or outdated? We offer in-house reverse engineering and manufacturing services.
Hardware design consulting
Are you using standard or custom groove sizes in your hardware? We have extensive experience and can help you determine lead-in dimensions, chamfer/fillet radius sizes, precision machining types, and installation tool designs.
You provide requirements for sealing solutions, including groove size, pressure, temperature, speed, media
Design and manufacture semi-finished products according to your sealing requirements, including raw material mixing, pressing, and sintering processes.
Material category
FJSEALS has a wide range of materials available for almost every type of seal product you may need. As you read here, selecting the appropriate material for seals is crucial. We provide selection guidance on these pages, but we also encourage you to contact our technical staff for answers and advice.
FJSEALS standard seal materials
FJSEALS material code
Operating temperature/℃
Applications
Notes
FJ-0100
-253~+260
Food, medicine/low pressure/static sealing/ general purpose
Color: white
Susceptible to creep under high temperature and high pressure
FJ-0110
-253~+260
Food, medicine/low pressure/static sealing/ special purpose
Color: white
Susceptible to creep under high temperature and high pressure
FJ-0120
-253~+260
Food, medicine/low pressure/static sealing/ high grade
Color: white
Susceptible to creep under high temperature and high pressure
FJ-0130
-253~+260
Food, medicine/low pressure/static sealing/ premium grade
Color: white
Susceptible to creep under high temperature and high pressure
FJ-0201
-200~+260
Pneumatic reciprocating/rotating/low pressure/soft hardware
Color: black
FJ-0202
-200~+260
Pneumatic reciprocating/rotating/low pressure/soft hardware
Color: black
FJ-0203
-200~+260
Pneumatic reciprocating/rotating/medium pressure/soft hardware
Color: black
FJ-0204
-200~+260
Pneumatic reciprocating/rotating/high pressure/soft hardware
Color: black
FJ-0211
-200~+260
Pneumatic reciprocating/rotating/low pressure/soft hardware
Color: black
FJ-0222
-200~+260
Pneumatic reciprocating/rotating/medium pressure/soft hardware
Color: black
FJ-0223
-200~+260
Pneumatic reciprocating/rotating/medium pressure/soft hardware
Color: black
FJ-0224
-200~+260
Pneumatic reciprocating/rotating/high pressure/soft hardware
Color: black
FJ-0231
-200~+260
Water, steam, oil, chemicals/ reciprocating, rotating/ low pressure
Color: black
Use with caution under high vacuum
FJ-0232
-200~+260
Water, steam, oil, chemicals/ reciprocating, rotating/ medium pressure
Color: black
Use with caution under high vacuum
FJ-0234
-200~+260
Water, steam, oil, chemicals/ reciprocating, rotating/ high pressure
Color: black
Use with caution under high vacuum
FJ-0301
-200~+260
Pneumatic reciprocating/rotating/low pressure/soft hardware
Color: black
FJ-0302
-200~+260
Pneumatic reciprocating/rotating/low pressure/soft hardware
Color: black
FJ-0303
-200~+260
Pneumatic reciprocating/rotating/low pressure/soft hardware
Color: black
Water, food, low-temperature gas sealing
Color: white
Not resistant to high temperatures
FJ-0702
-200~+80
Water, low-temperature gas media, dry friction
Color: black
Not resistant to high temperatures
FJ-0703
-200~+80
Water, low-temperature gas media, dry friction
Color: yellow
Not resistant to high temperatures
Note: In rare cases where there is no suitable existing material, FJSEALS can develop a material that fully meets your application parameters. Our engineers are experts in materials, and we have extensive equipment for developing new materials.
Spring types and materials
Media
Spring material
Spring code
For general purpose, such as oil, gas, grease, solvent, water, air, food, medicine, steam
Stainless steel AiSi301
S (standard)
For corrosive media, such as acids, corrosive agents, seawater.
Hastelloy-C-276
H
For oil & gas applications, such as crude oil and sour natural gas
Elgiloy
E
Note: The standard spring material used for spring is stainless steel AISI 301. Please contact us for specific operating conditions.
Spring type
Helical Spring
Canted Coil Spring (Slant Coil Spring)
V-Spring
Spring load
The symbol "O" represents the load point when installed in a groove.
Deflection, %
Helical springs are spiral-wound springs made from flat metal strips and are used in RS18 helical spring energized seals and spring energized face seals. They have a higher unit load and shorter deformation range than other types of springs, making them ideal for static and slow dynamic applications. RS18 seals and spring energized face seals are the preferred choice for vacuum, gas, and cryogenic applications.
V-spring is a standard form of spring, used in RS19 cantilever spring energized seal and RS19A flanged-energized rotary seal. The long beam leg design puts the spring load at the leading edge of the seal lip which allows the seal to act as a scraper or excluder seal. The V-shaped spring has a moderate load and deformation range.
Canted coil springs are made from round wire which is coiled and formed into an elliptical shape on an inclined position. These springs provide near constant spring force within a very wide deflection range. This allows precise control of friction during the service life. Its unique design prevents the seal from damaging the spring due to excessive deformation.
Hardware surface finish and hardness recommendations
Dynamic sealing surface
The function and service life of a seal is affected to a high degree by the surface finish of the mating surface to be sealed. A mating surface that is too rough has scratches, scores, nicks or spiral machining marks that can create leak paths and be abrasive to the seal.
For PTFE seals, the transfer of a thin film of PTFE from the seal lip to the mating dynamic surface is critical and will improve seal life. Dynamic surfaces with relatively rough finishes wear the seal lip material too rapidly. Extremely smooth dynamic surfaces result in material transfer insufficient to form a thin film and also lead to increase in seal wear.
The graph below illustrates the effect of surface finish and relative seal wear.
Static sealing surface
In most static sealing applications, good overall sealing performance can be achieved through smooth sealing surfaces and the recommended optimal surface finish is 0.8Ra or below. The static surface and the sealing ring surface must be concentrically aligned.
Air, nitrogen gas, argon gas, natural gas, and fuel.
0.15 to 0.3Ra
0.3 to 0.8Ra
Water, hydraulic oil, crude oil and sealants
0.2 to 0.4Ra
0.4 to 0.8Ra
Dynamic Sealing Surface Hardness
In most static sealing applications, good overall sealing performance can be achieved through smooth sealing surfaces. For most static sealing applications, the recommended optimal surface roughness for the sealing ring is 0.8Ra or above. The static surface and the sealing ring surface must be concentrically aligned.
Harder surfaces allow the use of higher wear-resistant seal materials that will increase both the seal and hardware lives. For slow-medium reciprocating motion and non-pressurized oil and rotary shaft seals, a minimum hardness of 40 Rockwell C or greater is recommended.
For moderate-high linear, or high speed rotary motions, a hardness of 60 to 70 Rockwell C is recommended. Some coatings tend to produce rougher sealing surfaces: Hard chrome plating and hard-anodized aluminum tend to produce open surface finishes, therefore the hardened surface after anodization should be polished.
Our customization advantages
Assisting your project from concept to production
Competitive prototypes and production cost
Custom parts in almost any material
Experienced technical staff assist you throughout the material selection process.
We offer a wide range of custom materials to meet specific requirements for chemical resistance, color, or physical properties.
Prototype design is our expertise.
Molding capabilities
Our primary manufacturing method is turning. When we receive a custom order, we thoroughly review it to ensure that the project aligns with our manufacturing capabilities. Here is an introduction to the custom processes:
Turning seals differ from traditional molded seals. It is an efficient and cost-effective technique where the raw material for turning hydraulic seals is extruded under high pressure after being heated and melted. The resulting billets are then machined into hydraulic seals using specialized CNC turning equipment programmed with seal-specific data. Turning hydraulic seals are not limited by size and can be manufactured in various specifications, cross-sections, quantities, and materials. With this technology, you don't have to bear the high costs and waiting time associated with mold pressing and tooling. FLSEALS can quickly design and produce seals that meet your requirements based on the groove dimensions and operating conditions (such as sealing pressure, temperature, and media) you provide.