GB Marine Ball Valve
GB Marine Ball Valve is a marine valve designed according to Chinese National Standards (GB) and widely used in shipbuilding, marine engineering, and vessel piping systems.GB Marine Ball Valves are commonly installed in vessels and marine systems requiring reliable pipeline control for different fluids, including:
Seawater
Fresh water
Cooling water
Fuel oil
Air
Other marine fluids
Compared with general industrial ball valves, GB Marine Ball Valves are developed specifically for marine applications and are suitable for shipboard environments with:
High humidity
Saltwater exposure
Mechanical vibration
Long-term operation
GB Marine Ball Valves are widely applied in:
Commercial ships
Cargo vessels
Fishing vessels
Marine equipment
Ship repair projects
Offshore facilities
Overview
Working Principle:
GB Marine Ball Valve controls fluid flow through a rotating ball structure inside the valve body.The internal ball contains a flow passage. By rotating the ball 90 degrees, the valve can quickly open or close the pipeline.
Open Position：When the ball passage aligns with the pipeline:
Fluid flows through the valve
Flow resistance is minimized
System efficiency is maintained
Closed Position：When the ball rotates perpendicular to the pipeline:
Fluid passage is blocked
Pipeline isolation is achieved
Leakage risk is reduced
The quarter-turn structure provides:
Fast operation
Easy control
Low operating torque
Reliable sealing
Main Components of GB Marine Ball Valve：
| Component | Function |
| Valve Body | Provides structural strength and pressure resistance |
| Ball | Controls fluid flow through rotation |
| Valve Stem | Transfers operating force to the ball |
| Valve Seat | Provides sealing performance |
| Handle | Controls opening and closing operation |
| Sealing Components | Prevent fluid leakage |
Applicable Standards
| Standard Category | Applicable Standards |
|---|---|
| Marine Valve Standards | GB/T 584, GB/T 585, GB/T 588, CB/T Marine Valve Standards |
| Ball Valve Design | GB/T 12237, GB/T 15185 |
| Flange Standards | GB/T 9112, GB/T 9113, GB/T 2501 |
| Material Standards | GB/T, ASTM, EN Material Standards |
| Pressure Testing | GB/T 13927, JB/T 9092, ISO 5208 |
| Marine Classification | CCS, ABS, DNV, LR, BV |
Pressure Testing：
Valve body strength
Sealing performance
Leakage prevention
Operating reliability
Technical Specifications of GB Marine Ball Valve：
| Item | Specification |
| Product Type | GB Marine Ball Valve |
| Standard | GB National Standard |
| Valve Type | Quarter Turn Ball Valve |
| Size Range | DN15-DN300 |
| Material Options | Bronze / Stainless Steel / Brass / Cast Iron |
| Connection Type | Threaded / Flanged |
| Operation Method | Manual Handle |
| Medium | Seawater / Fresh Water / Oil / Gas |
| Application | Marine Piping Systems |
Material Selection of GB Marine Ball Valve
Bronze
Stainless Steel
Brass
Cast Iron
Bronze GB Marine Ball Valve
| Feature | Description |
| Corrosion Resistance | Excellent resistance to seawater corrosion |
| Excellent resistance to seawater corrosion | Widely used in shipbuilding |
| Durability | Long operating life |
| Long operating life | Stable performance in marine systems |
Typical Applications:
Seawater cooling systems
Ballast systems
Marine water pipelines
Ship auxiliary systems
Stainless Steel GB Marine Ball Valve
| Feature | Description |
| Corrosion Resistance | Suitable for harsh environments |
| Strength | High mechanical performance |
| Durability | Long service life |
| Application Range | Suitable for demanding systems |
Typical Applications:
Offshore equipment
Marine engineering systems
Corrosive fluid pipelines
Brass GB Marine Ball Valve
| Feature | Description |
| Machinability | Machinability |
| Cost Efficiency | Economical choice |
| Maintenance | Simple maintenance |
Typical Applications
Small marine equipment
Auxiliary water systems
General pipelines
Cast Iron GB Marine Ball Valve
| Feature | Description |
| Mechanical Strength | Good structural performance |
| Cost Efficiency | Economical for large-size valves |
| Stability | Reliable performance in water systems |
Typical Applications
Large cooling water systems
Ballast systems
Marine industrial pipelines
Ship auxiliary equipment
