OER Rotary Rod Seals

OER Series Bidirectional Pressure Rotary Rod Seals | Industrial-Grade Hydraulic & Rotary Joint Solutions

Engineered for dynamic pressure environments, the OER Series Piston Rod Seal masters bidirectional fluid transfer in rotating spindles, machine tool hydraulics, and precision rotary joints. Its innovative dual-component design combines a wear-resistant modified PTEF+bronze ring with an elastic NBR O-ring, delivering leak-free performance under alternating pressure conditions where conventional rod seals fail.

Core Technical Specifications

• Working Pressure: ≤30 MPa (4,351 psi)

• Temperature Range: -30°C to +100°C

• Reciprocating Speed: ≤1 m/s (39.4 in/s)

• Media Compatibility:

  • Petroleum-based hydraulic oils

  • Water-glycol hydraulic fluids

  • Oil-water emulsions

• Material Composition:

  • Primary Seal: Bronze-reinforced PTEF (low-friction, anti-galling)

  • O-Ring: 70 Shore high-performance NBR

Performance Advantages

1. Pressure Alternation Mastery
Uniquely engineered for systems where pressure shifts across the seal face (e.g., rotary union test rigs, CNC turret hydraulics). The PTEF+bronze ring withstands 30 MPa directional switches without extrusion.

2. Triple-Fluid Resilience
Tested with ASTM D943-certified fluids:

• Water-glycol: Zero hydrolysis after 1,000h at 80°C

• Oil emulsions: 30% less swelling vs. standard PTFE seals

3. Critical Applications

• Rotating track spindles in port cranes

• High-cycle rotary joints for steel mill cooling systems

• Injection molding machine hydraulic rotators

Installation & Ordering Guidance

Installation Protocol

1. Edge Preparation: Chamfer all grooves to ≤0.3mm (avoid lip damage during fitting)

2. Surface Pairing: Hard-chromed shafts (HRC 60+) recommended for PTEF compatibility

3. Pressure Equalization: Install with pressure ports facing primary load direction

Ordering Examples (ISO 3601-1 compliant):

• Standard: OER-100

• Custom: OER-100 111 4.2

• Interchange: CR2037F0 (Parker legacy P/N)

Why Engineers Specify OER Seals

• 30,000+ Pressure Cycles in 80°C emulsion environments (proven at Siemens gearbox test labs)

• Zero Maintenance in rotary joints with ≤0.5m/s oscillation

• Corrosion Defense: Bronze filler reserves pitting in glycol fluids

Industry Certifications: RoHS 3, REACH SVHC-free