Hot forged brass body for improved mechanical strength Blow-out proof stem design for safety PTFE seats for reliable sealing performance Double O-ring stem sealing system 100% pressure and leakage tested Lockable lever handle for secure operation

Size Range: 1/2”~3″ Full Port, NPT ends Port Type: L-Port or T-Port Port Orientation: bottom entry Pressure Rating: 87 psi CWP (6 bar) Max Temperature: 344°F (173°C)

T-port ball valves are commonly used for mixing or distributing flow. Two inlet streams can be combined into a single outlet, or a single inlet can be directed to multiple outlets. The opposite flow direction is also possible, allowing a single source to divert flow in two directions simultaneously. T-Port ball valves can direct flow between just two ports, either to the left, to the right, or straight through. This configuration is widely used in chemical processing, water treatment, and industrial pipeline systems.

L-port ball valves are primarily used for flow diversion. The valve directs flow from one inlet to one of two outlets, making it suitable for switching service or directional control. Only one flow path is open at a time, preventing cross-flow between outlet lines. From a single inlet, flow can be directed into two different outlets. In the opposite flow direction, a single outlet can receive flow from either of two inlets.

3-Way Ball Valve Manufacturer
L-Port & T-Port | Class 150–600 | NTVAL

NTVAL manufactures L-Port and T-Port 3-way ball valves for diverting and mixing flow in industrial piping systems. Available in NPS 1/2"–10" (DN15–DN250), Class 150–600 with API 598 testing and MTR 3.1 documentation.

How a 3-Way Ball Valve Works

3-Way Ball Valve Flow Patterns:
L-Port vs T-Port

3-way ball valves are typically manufactured with two internal flow patterns: L-Port and T-Port. The choice between these configurations determines whether the valve is used for diverting flow, mixing flow, or isolating different pipeline directions.

L-Port valves are primarily designed for flow diversion. In most positions, the valve connects two ports while isolating the third port, making it ideal for switching flow between two pipelines.

T-Port valves provide more flexible flow control. Depending on the ball orientation, they can mix two inlet streams, divert flow to different outlets, or allow limited three-port communication. However, not every T-Port position guarantees bubble-tight shutoff between all ports.

Selection Rule for Engineers

• L-Port: Best suited for diverting service. One inlet can be switched between two outlet pipelines while the unused port remains fully shut off.

• T-Port: Suitable for mixing or diverting service. Two inlet streams can be combined or redirected to different outlets depending on the valve position.

If you are unsure which flow configuration fits your piping layout, send us your piping schematic and our engineers will recommend the correct flow pattern.

FAQ – L-Port vs T-Port Ball Valves

Q1 . What is the difference between L-Port and T-Port ball valves?
 
L-Port ball valves are designed primarily for diverting flow between two outlets while shutting off the third port. 
T-Port ball valves provide more flexible flow paths, allowing mixing, diverting, or partial three-port flow depending on the valve position.
 

Q2. Can a T-Port ball valve shut off all three ports?

In most configurations, T-Port ball valves do not provide bubble-tight shutoff between all three ports simultaneously.
They are typically used for mixing or diverting services rather than full isolation.

Q3. When should I choose an L-Port instead of a T-Port?

Choose an L-Port valve when the application requires switching flow between two outlets.
Choose a T-Port valve when the process requires mixing or distributing flow across multiple ports.

Quality Control

Quality Control for NTVAL 3-Way Ball Valves | API 598 Tested

Every NTVAL 3-way ball valve is inspected and tested in-house with calibrated equipment.

Quality documentation (PMI / hydro & seat test / MTR EN 10204 3.1) is available upon request.

PMI tests verify the material of the 3-way ball valve to confirm it meets the right specifications for strength and safety.

PMI Test

Every NTVAL 3-way ball valve is inspected and tested in-house with calibrated equipment. Quality documentation (PMI / hydro & seat test / MTR EN 10204 3.1) is available upon request.

The sealing test checks the 3-way ball valve’s ability to stop any leaks by closing off all possible paths that fluid could take.

Sealing Test

100% hydrostatic shell and seat leakage testing is performed according to API 598 to ensure reliable shut-off. Deliverable: hydro & seat test report (on request).

Low emission tests measure if the 3-way ball valve prevents harmful gases from leaking, protecting the environment and maintaining safe usage.

Low Emission Test

Low emission (fugitive emission) testing can be provided for projects requiring stricter stem sealing control. Deliverable: low emission test certificate/report (on request).

Impact tests involve striking the 3-way ball valve to see if it can handle sudden forces without breaking or losing its functionality.

Impact Test

Low emission (fugitive emission) testing can be provided for projects requiring stricter stem sealing control. Deliverable: low emission test certificate/report (on request).

Dimension inspection measures the 3-way ball valve’s size to confirm that it will fit properly in the intended system without issues.

Dimension Inspection

Dimensional inspection checks critical dimensions against approved drawings and applicable standards. Deliverable: signed dimensional inspection record (on request).

The painting thickness test measures the coating’s thickness on the 3-way ball valve to confirm it is well-protected from corrosion and wear over time.

Painting Thickness Test

Dry film thickness (DFT) is measured to verify coating protection meets the specified requirement. Deliverable: coating thickness report (on request).

PT testing, also known as dye penetrant testing, highlights cracks or defects on the 3-way ball valve’s surface that could weaken its performance.

PT (Dye Penetrant Test)

PT (dye penetrant testing) detects surface cracks and defects on castings or weld areas when required. Deliverable: PT / NDE report with acceptance results (on request).

Material inspection checks if the 3-way ball valve is made from the correct materials, confirming its quality and long-term reliability.

Material Inspection

Incoming material inspection verifies raw materials against MTR and ensures full traceability. Deliverable: MTR EN 10204 3.1 (or 3.2 when specified).

Manufacturing & Traceability Capabilities

Need special configurations for your project?
Send us your valve specification, P&ID, or piping drawing for engineering review.

3-Way Ball Valve Applications in Key Industries

Typical diverting and mixing duties across chemical, energy, water, and process industries.

The 3-way ball valve handles various chemicals without corroding, making it a reliable solution for controlling chemical flows efficiently.

Chemical Processing

Used for diverting or mixing corrosive media with material/seat options selected for chemical compatibility and leak-tight shutoff.

The 3-way ball valve directs oil and gas flow smoothly, reducing the risk of leaks and improving operational safety in petrochemical plants.

Petrochemical

Applied in oil & gas and petrochemical lines for reliable flow switching, sampling, and bypass service to reduce leakage risk and downtime.

In nuclear facilities, the 3-way ball valve safely controls fluid and gas flow, crucial for preventing dangerous situations and maintaining operations.

Oil, Power & Nuclear

Selected for critical isolation and flow routing where stable sealing, traceable materials, and documented testing are required.

The 3-way ball valve regulates the flow of pulp mixtures with ease, helping the industry maintain consistent production without clogging.

Pulp

Handles pulp and fibrous media for diverting and recirculation duties, helping reduce plugging and maintain process continuity.

The 3-way ball valve withstands harsh mining conditions while managing abrasive materials, establishing long-lasting performance in challenging environments.

Mining

Used in abrasive service for flow diversion and isolation, with robust materials and coatings specified to improve wear resistance.

The 3-way ball valve offers dependable control over water and waste, helping sewage systems run efficiently without contamination risks.

Water & Sewage

Common in treatment and distribution systems for switching, bypass, and flow balancing while minimizing cross-contamination risk.

The 3-way ball valve directs steam flow efficiently, preventing blockages and enhancing proper pressure control within industrial steam systems.

Steam System

Applied in steam and condensate lines for routing and bypass control, with seat/material selection matched to temperature and pressure.

In boiling systems, the 3-way ball valve regulates hot fluids and steam, helping maintain stable temperatures and safe operations for various applications.

Thermal / Boiler System

Used in hot-water and boiler auxiliary systems for diverting and mixing duties to support stable temperature control and safe operation.

Example Application: 3-Way Ball Valve in Chemical Mixing System

In chemical dosing and mixing systems, 3-way ball valves are commonly used to divert or combine process streams.

For example, in a chemical blending skid, a T-Port stainless steel 3-way ball valve can mix two incoming media streams before sending the combined flow to a reactor or storage tank.

Engineers often select T-Port configurations for mixing duty, while L-Port valves are preferred for diverting flow between parallel process lines.

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Specification

Main Part & Materials

3-Way Brass Ball Valve

Features & Benefits

Hot forged brass body for improved mechanical strength
Blow-out proof stem design for safety
PTFE seats for reliable sealing performance
Double O-ring stem sealing system
100% pressure and leakage tested
Lockable lever handle for secure operation

Specifications

Size Range: 1/2”~3″ Full Port, NPT ends
Port Type: L-Port or T-Port
Port Orientation: bottom entry
Pressure Rating: 87 psi CWP (6 bar)
Max Temperature: 344°F (173°C)

Industrial 3-Way Ball Valve

Three Way Ball Valves:

A 3-way ball valve features three ports and is typically available in two internal configurations: T-port and L-port. These designs allow the valve to perform flow diversion, mixing, or distribution functions within a single valve body.
Ideal for controlling and diverting flow without the need for a tee and multiple valves.
Can be used as a diverter, directing flow from one inlet to either of two outlets.
Can also function as an input selector, where the outlet is fed from either of the other two ports.

T-Port:

T-port ball valves are commonly used for mixing or distributing flow. Two inlet streams can be combined into a single outlet, or a single inlet can be directed to multiple outlets.
The opposite flow direction is also possible, allowing a single source to divert flow in two directions simultaneously.
T-Port ball valves can direct flow between just two ports, either to the left, to the right, or straight through.
This configuration is widely used in chemical processing, water treatment, and industrial pipeline systems.

L-Port:

L-port ball valves are primarily used for flow diversion. The valve directs flow from one inlet to one of two outlets, making it suitable for switching service or directional control.
Only one flow path is open at a time, preventing cross-flow between outlet lines.
From a single inlet, flow can be directed into two different outlets.
In the opposite flow direction, a single outlet can receive flow from either of two inlets.

Stainless Steel 3-Way Ball Valve

Full Port Design with Flanged Connections (2″ – 16″)

Stainless steel 3-way ball valves are designed for flow diversion and mixing in industrial piping systems.
These valves are widely used in chemical processing, water treatment, food and beverage, and other applications requiring corrosion resistance.

Two internal flow patterns are available:

• L-Port Ball: Suitable for flow diversion applications.
• T-Port Ball: Suitable for both mixing and diverting flow.

Air-actuated 3-way stainless steel ball valves can be equipped with pneumatic actuators to automate flow control in industrial systems.

What is a 3-Way Ball Valve?

A 3-way ball valve is a type of multi-port valve designed to control the direction of fluid flow in a piping system. Unlike standard two-way ball valves, a 3-way valve features three ports, allowing flow to be diverted, mixed, or distributed within a single valve body.

In most industrial applications, the three ports are configured as one inlet and two outlets, or two inlets and one outlet, depending on the required flow pattern. This design allows engineers to simplify piping layouts and reduce the number of valves required in a system.

Flow control is achieved by rotating the internal ball inside the valve body. The ball contains specially machined flow passages that align with the valve ports during operation. By turning the valve handle or actuator, the internal passage redirects the fluid between different ports.

A 3-way ball valve can perform several important functions in process systems:

Flow Diversion – redirect flow from one pipeline to another
Fluid Mixing – combine two inlet streams into a single outlet
Flow Distribution – split one inlet stream into multiple outlets
Shut-off or Isolation – block flow in selected directions

The flow behavior of a 3-way ball valve is mainly determined by the internal ball port design, which is typically manufactured in two configurations:

L-Port Ball
Provides two flow paths and is commonly used for flow diversion, directing one inlet toward either of two outlets.

T-Port Ball
Provides three flow paths and is typically used for flow mixing or distribution, allowing multiple flow directions through the valve.

3-Way Ball Valve Working Principle L-Port (Diverter) vs T-Port (Mixer)

There are 2 primary types of 3-way ball valves, each functioning differently from a standard ball valve:

1. L-Pattern (Diverter Valve)

Functionality:
The L-port 3-way ball valve is primarily used for flow diversion. By rotating the valve ball, the flow path is redirected from one outlet port to another.

Flow Control:

In the first position, the inlet is connected to the left outlet.
A 90° rotation redirects the flow to the right outlet.
The valve operates as a quarter-turn device, providing simple and reliable directional control.

Flow Positions:

Only two ports are connected at any time.
The design prevents cross-flow between outlet pipelines.
Commonly used in diverter or switching applications.

2. T-Pattern (Mixer Valve)

Functionality:
The T-port 3-way ball valve is designed for mixing or distributing flow. It allows multiple flow paths inside the valve body.

Flow Control:

Two inlet streams can be combined into a single outlet.
A single inlet can also be distributed to two outlets simultaneously.

Flow Patterns:

Multiple ports can be connected depending on the ball orientation.
The valve can operate in mixing, distributing, or straight-through flow modes.

Application Characteristics:

Suitable for process mixing and multi-directional flow control.
Widely used in chemical processing, water treatment, and industrial piping systems.

Main Characteristics of 3-Way Ball Valves

3-way ball valves are designed to control flow direction in piping systems by using a rotating ball with internal flow passages. Compared with conventional two-way valves, a 3-way valve can perform multiple flow control functions within a single valve body.

What is the 3-Way Ball Valve used for?

A 3-way ball valve is widely used in industrial piping systems to control the direction of fluid flow.
Depending on the internal ball configuration, the valve can perform functions such as diverting flow, mixing media, or distributing fluid to multiple pipelines.

3-Way Ball Valve Selection Guide

The main consideration while selecting the right valve for your application are:

Determine the fluid to be used in the system, this is required to choose the right and equivalent valve seal.
Determine the pressure rating of the system where the valve needs to be fitted.
Know the temperature to which the system usually works on.
Check the connection type whether the valve is compatible to be connected to the piping or not.
The material used for the valve body must be compliant with the existing process lines and appropriate for the process temperature and pressure.
Determine the operation mechanism of the valve and whether it is feasible for application in the existing system.

3-Way Ball Valve vs 2-Way Ball Valve

Feature	3-Way Ball Valve	2-Way Ball Valve
Ports	Three ports	Two ports
Function	Flow diversion or mixing	On/off isolation
Flow Control	Redirect or combine flow	Straight flow only
Valve Types	L-Port / T-Port	Standard Ball
Typical Applications	Mixing, diverting, bypass systems	Shut-off and isolation

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Additional General Insights Here

Specifications of 3 Way Ball Valve

Materials

3-way ball valves are available in multiple material options to meet different process requirements:

• Stainless steel (CF8 / CF8M / SS304 / SS316)
• Carbon steel (WCB)
• Alloy steel for severe service

Material selection depends on media type, corrosion conditions, and operating environment.

Valve Size and Dimensions

NTVAL 3-way ball valves are available in a wide range of sizes:

• Size Range: 1/2″ – 10″ (DN15 – DN250)
• Connection Types: Flanged / Threaded / Welded
• Flow Configuration: L-Port / T-Port

These options allow the valve to fit various pipeline systems and flow control requirements.

Pressure and Temperature Ratings

3-way ball valves are designed for demanding industrial environments:

• Pressure Rating: ANSI Class 150 – 600
• Temperature Range: -196°C to 450°C
• Seat Options: PTFE / RPTFE / PEEK / Metal Seat

These specifications ensure safe and reliable operation under different process conditions.

Key Features of 3 Way Ball Valve

Easy Operation

3-way ball valves use a quarter-turn mechanism that allows quick and simple operation. • Fast opening and closing • Low operating torque • Suitable for manual or automated control

User-Friendly Design

The compact structure of the valve simplifies installation and maintenance. • Compact body design • Easy actuator integration • Reduced maintenance requirements

Leak Proof

3-way ball valves provide reliable sealing performance. • Tight shut-off capability • Stable sealing under pressure • Suitable for various industrial media.

Advantages of Using 3-Way Ball Valve

Increase Versatility

A single 3-way valve can perform multiple flow functions: • Flow diversion • Fluid mixing • Flow distribution This flexibility makes it suitable for many industrial systems.

Reduces Multiple Valves

By integrating multiple flow paths in one valve body, a 3-way ball valve can replace several traditional valves. • Simplifies pipeline design • Reduces installation space • Lowers system cost

Enhanced Performance

The optimized flow control improves overall system performance. • Efficient flow regulation • Reduced pressure loss • Reliable long-term operation

Applications of 3 Way Ball Valve

Oil and Gas Industry

NTVAL’s 3 Way Ball Valves play a vital role in controlling the flow of crude oil, natural gas, and other fluids in the oil and gas industry. They are used in pipelines and refineries to switch the direction of flow or to mix different streams. The ability to operate under high pressure and extreme temperatures makes them indispensable in this field. Their durable design provides long-lasting performance in harsh environments.

Water & Sewage

3 Way Ball Valves control the flow of water and wastewater through different treatment processes. They allow operators to switch between flow paths easily, making them ideal for diverting water and managing multiple pipelines. Their durable design and ability to handle large volumes of fluid make them essential in water management.