01
Identifying the Cause of Recurring Leaks
Based on signs of wear, scratches, and deformation on the sealing lip, and by comparing them with the grooves, mating surfaces, and operating conditions, identify areas for improvement.
SPRING-ENERGIZED SEAL
To ensure the sealing lip stays in place,
One-Time Confirmation of Replacement Specifications
Please send us the old seals, groove drawings, and operating conditions so we can review the seal jacket, internal spring, and mating dimensions together to determine whether to replace them or customize a solution.
Sealing JacketSpring TypesGroove DimensionsExercise Conditions
CHALLENGES FACED
Have you encountered these issues when looking for spring-enhanced seals?
Is there a constant leak at the seal during low pressure or start-stop operations?
Even after repeatedly replacing the seals, do wear and leaks still recur?
The material looks like it should work, but it fails to seal when installed in the groove?
WHY CHENGSHIN
Sleeve, spring, and groove—check them all together to ensure a proper fit
First, examine the medium, temperature, pressure, and operating conditions; then check the sealing lip, spring, and mating surfaces to narrow down the causes of repeated failures one by one. If you have old parts, drawings, or part numbers, start with the information you already have.
WHY CHENGSHIN
6 Key Advantages of Chengxin Springs' Enhanced Sealing Technology
Verify each step to ensure that the materials, specifications, and equipment conditions align.
02
Select the jacket material based on operating conditions
Evaluate the medium, temperature, and wear and friction requirements to select PTFE or other high-performance polymers.
03
The spring is supplied together with the sealing lip
Take into account initial contact, frictional resistance, and media compatibility when selecting the appropriate spring type and material.
04
Groove Dimension Alignment
Check the inner and outer diameters, cross-section, groove width and depth, and fit clearance—whether replacing old parts or custom-making them according to drawings, everything is clear.
05
Clearly describe the action and the direction of the force
Confirm the static, reciprocating, or rotational positions, along with the speed, stroke, and direction of pressure.
06
Drawings and documents are complete
Confirm the drawing version, jacket and spring materials, dimensions, and test items to provide a basis for prototype acceptance.
PRODUCT SELECTION
First, determine the intended use of the seal, then select the appropriate material and dimensions.
A polymer jacket is paired with an internal metal spring, which provides the initial contact force for the sealing lip.
STEP 01
First, determine the purpose of your seal.
They are classified into three types based on the direction of pressure, mating surfaces, and operating conditions.
01
Static/Vacuum Seal
Fixed-seal, low-pressure, or vacuum applications; select the outer sleeve and spring based on the sealing direction, groove, and leakage requirements.
Send Groove Drawing for Confirmation →
02
Reciprocating Seals
Check the fit between the sealing lip and the groove based on the speed, stroke, and wear on the old part to determine the reciprocating position of the rod or piston.
Upload a photo of the old item →
03
Special Sizes / Custom-Made to Specifications
Please provide samples, photos, or groove drawings so we can discuss replacement options, prototyping, and manufacturing services.
Start Uploading Images →After confirming the sealing applicationSelect materials for the outer casing and springs
STEP 02
Select materials for the outer casing and springs
Confirm the outer casing and metal springs separately, and compile them into specifications ready for a quote.
PTFE
PTFE Sealing Sleeve
Please send photos of the medium, temperature, and wear, and verify them along with the seal lip and mating dimensions.
Low Friction, Chemical Resistance
Polymer
Other High-Performance Polymer Jackets
Discuss potential material candidates and machinable dimensions based on the conditions of use and original specifications.
Selecting Materials Based on Operating Conditions
spring
Metal Spring Materials and Types
Select the appropriate spring type and material based on the contact medium, pressure direction, and operating conditions.
Initial contact force
Do you have any old parts or groove drawings?
Forward it directly to Chengxin for his assessment.
APPLICATIONS
Identify the conditions to verify based on the location of use
Find the section that applies to you and send us the information accordingly.
Static/Vacuum | Low-Pressure Contact Stability
Check the pressure direction, leakage requirements, and mating surfaces to ensure a tight seal during low-pressure operation and during start-up and shutdown.
Corresponding parts:O-Ring、Vacuum sealing lip
Reciprocating Motion | Friction and Wear
Check the speed, stroke, lubrication, and surface of the rod, and make a judgment based on these factors along with any signs of wear on the seal lips.
Corresponding parts:Hydraulic Seals、Backup Ring
Special Media | Material Compatibility
When the medium or cleaning conditions change, check both the polymer jacket and the metal spring material at the same time.
Corresponding parts:FFKM、Sanitary Sealing
INCOMING MATERIAL VERIFICATION
Verified materials, peace of mind with every delivery
Each batch of parts is accompanied by comparison results and documentation, so they can be accepted directly by the quality control department.
FTIR Material ComparisonWe verified the feedstock material through spectral analysis, and it matched the specifications.
Test reports are traceableThe comparison results and inspection records are retained and can be provided upon request.
The documents are in order, and the specifications are ready for acceptance.Material certification and compliance documentation are provided based on manufacturer or third-party documents, including requirements such as REACH, RoHS, FDA, COA, PFAS, and PFOS.
Simultaneous Verification of Dimensions and AppearanceDimensions and appearance are checked on a batch-by-batch basis and match the drawings.
DELIVERY
From on-site needs to replacement, prototyping, and supply
We will provide specifications tailored to your on-site needs.
Recurring Leaks
Recurring Leaks | Replacement Parts
Provide the old part, the time of the leak, and the groove drawing; compare the sealing lip, spring, and mating surfaces; and compile a list of replacement specifications for which we can request quotes.
Scope of Delivery: Materials, Dimensions, and Replacement Parts
Process Condition Adjustments
Process Adjustments | Samples and Testing
If there are changes in the medium, pressure, or operating conditions, please provide the new operating conditions and the original specifications so we can verify the materials and design, and then discuss the sample and test conditions.
Delivery Details: Samples, Prototyping Specifications, and Test Items
Customization and Ongoing Supply
Custom Supply | Bulk and Long-Term Supply
Provide drawings or samples, intended use, and quantity; confirm the machinable dimensions and acceptance criteria; and coordinate the transition from prototyping to mass production.
Delivery Options: Custom Parts, Bulk Orders, and Long-Term Supply
HOW TO GET STARTED
Organize all the product selection information at once
As long as you have photos of the old parts, you can get started; you can fill in the rest of the information later.
01
Media and Operating Conditions
Medium and concentration, normal and maximum temperatures, pressure range, vacuum, or start-up and shutdown conditions.
02
Grooves and Operating Conditions
Groove drawings, inner and outer diameters, cross-sections, fit clearances, as well as motion speed and stroke.
03
Delivery and Verification Requirements
Quantity, intended use, sample testing methods, and any required materials or compliance documents.
CONTACT
Send me the data so we can move right on to the next step.
Whether you provide old seals, groove drawings, dimensions, part numbers, or operating conditions, Chengxin will help you organize the required specifications and then provide guidance on replacements, quotes, or prototyping.