Ningbo Kaxite Sealing Materials Co., Ltd.
Ningbo Kaxite Sealing Materials Co., Ltd.

Quality Control

At Kaxite Sealing, quality is not an afterthought — it is built into every stage of our manufacturing process. From raw material inspection to final packaging, every batch undergoes rigorous testing to ensure performance, reliability, and compliance with international standards.

Quality is the foundation of everything we do at Kaxite Sealing. Our QC system is designed to ensure that every braided packing, die-formed ring, and sealing product meets or exceeds your specifications. We operate under a fully documented quality management system certified to ISO 9001, with rigorous testing at every stage — from incoming raw materials to finished goods ready for shipment.

Our Quality Control Process — 4 Stages of Assurance

📦 1
Incoming Material Inspection

All raw materials — fibers, PTFE, graphite, aramid, carbon — are inspected and certified before entering production

⚙️ 2
In-Process Quality Monitoring

Continuous monitoring of braiding tension, density, and dimensions during production to ensure consistency

🔬 3
Finished Product Testing

Comprehensive testing per ASTM standards — compressibility, recovery, density, and dimensional accuracy

📋 4
Final Release & Documentation

MTC per EN 10204 3.1 issued with every order — full traceability from raw material to finished product

Testing Equipment & Capabilities

⚖️
Density & Hardness Testers

Verifying consistent packing density and hardness across all product batches per ASTM F36

📏
Dimensional Inspection Tools

Precision measurement of braid dimensions, squareness, and cross-section — accurate to ±0.1mm

🔧
Compressibility & Recovery Testers

ASTM F36 compression and recovery testing — critical for pump packing performance

🔥
Thermal Aging Ovens

High-temperature aging tests to validate long-term stability of graphite, PTFE, and aramid packings

🧪
Chemical Resistance Test Setup

Verifying chemical compatibility with acids, alkalis, solvents, and aggressive media

📸
Visual Inspection Station

End-to-end visual inspection for braid uniformity, surface finish, and defect detection

Key Testing Standards We Follow

ASTM F36 Compressibility and recovery of gasket materials
ASTM F152 Tensile strength and elongation of non-metallic gaskets
ASTM F104 Classification system for non-metallic gasket materials
ASTM D2240 Rubber hardness — durometer testing
ASME B16.20 Dimensional standards for metallic and semi-metallic gaskets
API 607 Fire-safe testing for valves and sealing components

What We Test — Every Batch

📊 Density

Verifying packing density to ensure consistent sealing performance across all batches

📏 Dimensional Accuracy

Precision measurement of cross-section, length, squareness — ensuring gland fit

🔁 Compressibility & Recovery

Critical for pump and valve applications — ensures seal integrity under pressure

💪 Tensile Strength

Verifying structural integrity of braided packings under tension load

🧪 Chemical Compatibility

Validated resistance to acids, caustics, solvents, and aggressive process media

🔥 Thermal Stability

Heat aging tests for graphite, PTFE, and high-temperature packings

Traceability — Every Order, Every Batch

1
Raw Material Lot

Every fiber, PTFE, and graphite lot is logged with certificate and batch number

2
Production Batch

Unique batch ID assigned during production — links to materials, process parameters, and operators

3
Test Results

All QC test data is recorded and linked to batch ID — fully auditable

4
MTC Issuance

Material Test Certificate per EN 10204 3.1 included with every order

ISO 9001 API 607 ASME B16.20 NACE MR0175 FDA 21 CFR 177.1550 USP Class VI
🔍 Need to review our QC documentation?

We provide full QC reports, MTC samples, and traceability flowcharts upon request.

Request QC Docs →

Quality You Can Verify — Before You Order

Ask us for batch test reports, certification samples, or schedule a supplier quality audit — we are transparent because we are confident.

Contact Our QC Team →
📞 +86-574-87527771  |  ✉️ [email protected]  |  💬 WhatsApp
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