KA3J Mechanical Seal

VAJ/KA3J PTFE Rotary Rod Seals | FDA-Compliant Hydraulic Seals for Adhesive Media

Engineered for extreme industrial environments, the VAJ/KA3J Piston Rod Seal redefines chemical resistance in mixers, blowers, and food processing machinery. Combining PTFE sealing lips with a corrosion-resistant SUS stainless steel framework, this hydraulic cylinder rod seal conquers adhesive powders, viscous liquids, and aggressive chemicals where conventional seals fail.

Unmatched Technical Specifications

• Material:

  • Sealing Lip: Chemical-resistant PTFE (Polytetrafluoroethylene)

  • Structural Frame: SUS Stainless Steel

• Temperature Range: -70°C to +260°C (-94°F to +500°F)

• Working Pressure: ≤20 bar (290 psi)

• Surface Speed: ≤20 m/s (3,937 ft/min)

• Media Compatibility: Petroleum-based hydraulic oils, adhesive fluids, food-grade substances

• Certifications: FDA-compliant for food/pharmaceutical applications

Critical Applications & Advantages
Ideal for sealing challenges involving:

• Adhesive Media: Seals sticky slurries in industrial mixers without clogging

• High-Temperature Processing: Blower shaft seals in 260°C thermal oil systems

• Sanitary Environments: Aseptic food machinery with CIP/SIP cleaning cycles

• Chemical Exposure: Resists acids/alkalies in pharmaceutical reactors

Key performance benefits:

• Zero Contamination: Stainless steel framework eliminates rust risks

• Dry-Run Capable: PTFE lips operate without lubrication

• Non-Stick Surface: Prevents material buildup in powder handling systems

• Thermal Shock Resistance: Withstands rapid -70°C ↔ +260°C transitions

Installation & Operational Guidelines

1. Surface Finish: Pair with hardened shafts (Ra ≤0.2μm) to prevent PTFE abrasion

2. Clearance Control: Maintain axial play per VAJ/KA3J datasheet specifications

3. Pressure Caution: Not for high-pressure systems >20 bar – use backup rings if pulsations exceed limit

4. Speed Optimization: For 20m/s operations, combine with KVK O-rings (sold separately)

Why VAJ/KA3J Outperforms

• 260°C Thermal Barrier: 2× higher temperature tolerance than standard PTFE seals

• Stainless Steel Skeleton: 316L SUS framework prevents galvanic corrosion

• FDA/GMP Compliance: Full material traceability for food/pharma sectors

Upgrade to chemical-proof rod seals trusted by cement plants, sauce processors, and industrial blower OEMs. Request free PTFE compatibility reports or sanitary design validations!