B18

B18 Series U Ring Rod Seals by KVK Seals – Precision Sealing Solutions for Pneumatic & Hydraulic Systems

For industrial equipment demanding leak-free performance under extreme pressures, the B18 Series U Ring Rod Seals deliver unmatched reliability. Engineered with a proprietary polyurethane (PU)-NBR composite, these standard pneumatic rod seals combine wear resistance with dynamic responsiveness, making them ideal for heavy-duty mobile machinery, hydraulic presses, and precision automation systems.

Why Choose B18 U Ring Seals?
As a globally trusted shaft sealing solution, the B18 series excels where generic seals fail:

• Triple-Layer Anti-Extrusion Design: Reinforced PU lip, NBR energizer, and polyacetal backup ring prevent deformation under 600 bar pressure spikes314.

• Zero-Friction Break-In: Pre-lubricated surface reduces initial wear by 40% compared to traditional U seals, extending service life to 18,000+ cycles14.

• Temperature Resilience: Operates flawlessly from -40°C to +110°C without hardening or cracking, even in frost-prone or high-heat environments.

• Universal Compatibility: Resists mineral oils, biodegradable fluids, and mild chemicals, adhering to ISO 5597/1 groove standards1.

• Plug-and-Play Installation: Precision-molded geometry enables tool-free assembly, cutting maintenance downtime by 30%14.

Technical Specifications

Engineered for Critical Applications
The B18’s U-ring profile addresses common failure points in rod seals:

1. Shock Load Resistance: Multi-lobe design absorbs pulsating pressures in excavator boom cylinders and stamping presses14.

2. Abrasion Defense: Carbon-fiber-reinforced PU matrix withstands particulate contamination in mining and forestry equipment3.

3. Anti-Burst Structure: Interlocking lip geometry prevents blowouts during rapid rod retraction, a common issue in pneumatic systems1.

Industries We Serve

• Construction Machinery: Seal longevity exceeds OEM requirements for excavator hydraulic cylinders (18–24 months service life)14.

• Food Processing: FDA-compliant material variants available for hygienic pneumatic conveying systems.

• Offshore Equipment: Saltwater-resistant formulations prevent corrosion in subsea actuator rods3.

Quality Assurance
Every B18 U Ring Seal undergoes:

• 72-hour pressure cycling tests simulating 10-year operational stress3.

• Thermal shock trials between Arctic (-40°C) and desert (+110°C) conditions.

• Surface finish compatibility checks (0.1–1.6μm Ra recommended)14.

Customization Options
While standardized for quick delivery, KVK Seals offers:

• Material Upgrades: FKM for high-temperature pneumatics, HNBR for chemical resistance.

• Dimension Modifications: Rod diameters 10–500 mm, with custom groove machining support.