A 2-pc ball valve is a type of stainless steel ball valve constructed from two main body sections that are bolted or threaded together, along with a ball, stem, and sealing components. The ball is a hollow, perforated sphere connected to a stem; when the handle rotates it 90 degrees, the ball aligns with or blocks the flow path to open or close the valve.
This two-piece design allows the body to be separated, providing easy access to internal components for inspection, maintenance, or replacement without removing the valve from the pipeline. Made from durable materials such as stainless steel or brass, 2-pc stainless steel ball valves offer excellent corrosion resistance and are widely used in industries including oil and gas, petrochemicals, water treatment, and HVAC systems.
Threaded Connection: Female Threads x Female Threads
Port: Full Port Valve (Full Bore, Maximum ID)
Pressure: Rated to 1000 PSI
Seals: PTFE/Teflon (Heat and Chemical Resistant)
Handle: Lever Type with Locking Latch and Blow Out Proof Stem
Sizes: 1/4" up to 4"
The main features of a 2-piece ball valve include:
● Compact design: The two-piece structure makes it more compact and lighter than a three-piece valve.
● Cost-effective: A simpler construction results in lower cost compared to three-piece valves.
● Moderate maintenance: The valve can be disassembled for maintenance, but it must be removed from the pipeline, making it less convenient than a three-piece valve.
● Full port or reduced port options: Available in full-bore or reduced-bore designs to suit different applications.
● Good sealing performance: Provides effective sealing, making it suitable for applications with high leak-prevention requirements.
● Wide range of applications: Commonly used in residential, commercial, and industrial systems where maintenance is infrequent and compact size is sufficient.
● Durable construction: Made from materials such as stainless steel, brass, or plastic, offering long service life and resistance to various pressures and temperatures.
Common Features of 2-Piece Ball Valves
● Full port design
● Threaded end connection
● Quarter-turn operation
● Bi-directional flow
Full Port Ball Valve
A full port ball valve (also known as full bore) has an internal bore that matches the inner diameter of the pipeline. This design allows fluid to flow through the valve with minimal restriction, resulting in maximum flow capacity and very low pressure drop.
Full port ball valves are ideal for applications where flow efficiency is critical and pressure loss must be minimized. They are widely used in oil & gas, chemical processing, and high-flow industrial systems. The smooth flow path also reduces turbulence and wear, making these valves suitable for viscous fluids or media containing particles.
Threaded Ball Valve
A threaded ball valve features threaded end connections that allow it to be easily screwed into matching pipe threads. This design offers quick installation, secure sealing, and easy removal, making it a popular choice for piping and industrial systems.
The most common thread types include:
NPT (National Pipe Thread) – widely used in the United States, featuring a tapered thread for tight sealing
BSP (British Standard Pipe) – commonly used in other global markets
Threaded ball valves are especially valued for their convenience during maintenance or replacement.
Quarter-Turn Ball Valve
A quarter-turn ball valve operates by rotating the handle 90 degrees to fully open or close the valve. When the handle is parallel to the pipeline, the valve is open; when perpendicular, the valve is closed.
This simple operation allows for fast response, easy control, and reliable shut-off. Compared to multi-turn valves, quarter-turn ball valves experience less wear and remain functional even after long periods of inactivity, resulting in a longer service life.
Bi-Directional Ball Valve
A bi-directional ball valve has two ports—an inlet and an outlet—and allows flow in either direction. It provides straightforward on/off control and is one of the most common valve designs used today.
With its straight-through flow path and dependable sealing, a bi-directional ball valve is ideal for controlling liquids or gases in a single pipeline with consistent and reliable performance.
FAQ Of 2 PC Threaded End Ball Valves
Q1: What is the size range of 2 piece ball valves ?
A1: The size range of 2 piece ball valves is from 1/4 inches to 4 inches.
Q2: What is a 2 piece ball valve made of ?
A2: It is made of stainless steel SS316.
Q3: What are the working pressures of 2 piece ball valves?
A3: The working pressures of 2 piece ball valves are 1,000 psi and 2,000 psi.
Q4: What are the features of 2 piece ball valves?
A4: 2 piece ball valves are made up of two separate pieces which are threaded or linked together with bolts and flange assembly. The first piece comprises the end connection and the body, and the second piece fits into the first to secure the trim and give the second end connection.
Q5: What is the function of 2 piece ball valves?
A5: 2 piece ball valves hold the potential of leakage where the two pieces are joined, however at the same time allow disassembly of the valve if the need of replacing the internal parts arises.
Q6: Is 2 piece ball valve a reduced bore or standard bore?
A7: 2-piece ball valve is a full-bore (standard bore) valve with an over-sized ball that matches the size of the hole in the ball to pipeline applications.
In summary, a 2-pc ball valves are a versatile valve option with a body composed of two separate pieces. It offers easy installation, maintenance, and reliable flow control in various industrial and commercial applications.
Cencho supplies high quality 2-pc ball valves, our ball valves are sold to 17 countries around the world, we can accept customization, if you have any questions, please contact us.
