VIIPLUS SOLUTIONS® Stainless Steel PTFE Composite Bearings for Double Offset Butterfly Valves

Low-Friction Surface with Structural Strength，

Low-friction surface with structural support and strength

VIIPLUS SOLUTIONS® Stainless Steel PTFE Composite Bearings combine a reinforced PTFE sliding layer, glass fiber reinforcement, and a stainless steel backing to deliver the strength and dimensional stability of a metallic structure together with the low-friction and wear-resistant characteristics of advanced composite bearing materials.

This engineered bearing system is designed to reduce:

• Brinelling (permanent surface indentation)
• Fretting wear caused by micro-movements
• Galling and adhesive wear
• Boundary lubrication failures

The composite structure also provides inherent vibration damping and load distribution capabilities, making it suitable for a wide range of shaft materials and demanding industrial operating conditions.

Available configurations include:

• Wrapped Radial Bearings
• Composite Thrust Washers
• Flanged Bearings
• Custom-Engineered Bearing Components

The VIIPLUS SOLUTIONS® Bearing Advantage

VIIPLUS SOLUTIONS® PTFE Composite Bearings are thin-wall, self-lubricating sliding bearings specifically engineered for applications where installation space is limited and maintenance access is difficult.

The bearing structure combines:

Structural Backing

• ASTM A240 Type 316 Stainless Steel
• ASTM A240 Type 304 Stainless Steel
• Duplex Stainless Steel (Optional)

Self-Lubricating Sliding Layer

• PTFE
• Glass Fiber Reinforcement
• Wear-Resistant Fillers
• Solid Lubricant Additives

This design eliminates the need for grease lubrication and significantly reduces maintenance requirements throughout the service life of the equipment.

Technical Characteristics

Why Use Stainless Steel PTFE Composite Bearings?

VIIPLUS SOLUTIONS® Composite Bearings should be considered when:

Corrosive Media Are Present

Suitable for:

• Seawater Systems
• Offshore Equipment
• LNG Facilities
• Sour Gas Applications
• Chemical Processing Plants

Lubricant Contamination Is Unacceptable

Ideal for:

• Water Treatment Systems
• Food Processing Equipment
• Pharmaceutical Machinery
• Clean Process Industries

Maintenance Access Is Limited

Recommended for:

• Offshore Platforms
• Subsea Equipment
• Remote Installations
• Critical Valve Systems

High Impact Loads Are Expected

Suitable for:

• Industrial Valves
• Heavy-Duty Actuators
• Hydraulic Equipment
• Rotating and Oscillating Machinery

Low-Speed, Heavy-Load Applications

Designed for:

• Double Offset Butterfly Valves
• Triple Offset Butterfly Valves
• Ball Valves
• Gate Valves
• Hydropower Equipment

Lubricant Films Cannot Be Maintained

Ideal for:

• Dry Running Conditions
• Intermittent Operation
• High Humidity Environments
• Corrosive Service Conditions

Material System for Valve Bearing Applications

VIIPLUS SOLUTIONS® VSB-10SS-NACE

A high-performance stainless steel PTFE composite bearing system specifically developed for valve shaft support applications in the oil & gas, LNG, offshore, and power generation industries.

Material Construction

• PTFE Wear Layer
• Glass Fiber Reinforcement Layer
• ASTM A240 Type 316 Stainless Steel Backing

Compliance

• ASTM A240 Type 316
• ANSI/NACE MR0175
• ISO 3547
• Industrial Valve Service Requirements

Key Benefits

• Self-Lubricating Operation
• Excellent Corrosion Resistance
• Reduced Valve Operating Torque
• Extended Service Life
• Resistance to Fretting and Brinelling
• Dimensional Stability Under Load
• Reliable Performance in Sour Service Environments

Double Offset Butterfly Valve Bearing Solution

In Double Offset Butterfly Valves (DOBFV), bearing performance directly influences:

• Operating Torque
• Shaft Alignment
• Seat Integrity
• Service Life
• Maintenance Intervals

VIIPLUS SOLUTIONS® Stainless Steel PTFE Composite Bearings are engineered to support both upper and lower valve shaft positions, providing stable shaft guidance while minimizing friction and wear throughout repeated opening and closing cycles.

For Class 150 Double Offset Butterfly Valves ranging from 4″ to 20″, the recommended bearing configuration utilizes:

316 Stainless Steel + PTFE/Glass Fiber Composite Bearing System

This material combination achieves an optimal balance between:

• Load Capacity
• Corrosion Resistance
• Self-Lubrication
• Long-Term Reliability

In NACE MR0175 sour gas service, LNG facilities, offshore platforms, refineries, and cooling water systems, VIIPLUS SOLUTIONS® Composite Bearings provide a durable and maintenance-free alternative to conventional bronze bushings and metallic bearing sleeves.

By reducing friction, eliminating lubrication requirements, and extending service life, VIIPLUS SOLUTIONS® bearing systems help improve valve reliability while lowering total lifecycle operating costs.