As infrastructure grows more complex and industries demand higher efficiency and reliability, valve technology must evolve to meet these challenges. Whether in municipal water networks, industrial pipelines, or wastewater treatment systems, valves play a critical role in ensuring flow control, pressure regulation, and system safety. Among the most crucial components are double offset high performance butterfly valves, double orifices air valves, and ductile iron double eccentric butterfly valves.
These cutting-edge designs from WTS Valves combine durability, operational efficiency, and precision—making them indispensable for a wide variety of applications.
The Role of the Double Offset High Performance Butterfly Valve
The double offset high performance butterfly valve is a major advancement in valve engineering. Unlike traditional concentric butterfly valves, this model features two offsets in its design: one at the shaft axis and another at the seat plane. This geometry reduces wear on the sealing surface, enabling tighter shutoff and longer service life.
Key Features:
Bi-directional sealing capability
Resistant to high temperature and pressure
Suitable for HVAC, chemical, oil & gas, and power industries
Reduced operating torque for energy savings
Because the disc moves away from the seat during operation, friction is minimized, making the valve especially well-suited for applications requiring frequent cycling and minimal leakage.
Double Orifices Air Valve: A Small Device With a Big Job
Air valves might seem minor, but their function is essential for maintaining the health of a pipeline system. The double orifices air valve performs two vital roles: releasing air pockets during system start-up and admitting air during pipeline drainage or vacuum conditions.
Without proper air control, trapped air can cause flow disruptions, increased energy consumption, and even catastrophic pipe bursts. WTS’s design includes a large orifice for high-volume air discharge and a smaller orifice for continuous low-flow venting—ensuring the system remains balanced at all times.
Benefits:
Prevents pipeline surges and vacuum damage
Improves pump efficiency and flow accuracy
Durable build for corrosive and high-pressure environments
Automatic dual-action for different flow conditions
Ductile Iron Double Eccentric Butterfly Valve: Strength Meets Precision
In applications that demand a robust valve capable of withstanding high-pressure conditions while delivering precise control, the ductile iron double eccentric butterfly valve is the ideal choice.
Its double eccentric structure, where the shaft is offset from both the pipe center and the valve seat, provides a cam-like closing action. This allows the disc to quickly disengage from the seat with minimal wear. The ductile iron body ensures durability and resistance to mechanical stress, making this valve perfect for waterworks, fire protection, and industrial processing.
Highlights:
ANSI and DIN standard compatibility
High sealing integrity and low maintenance
Resilient seat and corrosion-resistant coatings
Long-term reliability under cyclic loads
Choosing the Right Valve for Your Application
Each valve type serves a unique purpose in flow control systems:
Municipal water systems, fire protection, industrial lines
Robust build, tight shutoff, extended service life
Investing in the right valve improves system reliability, reduces downtime, and ensures compliance with safety and operational standards.
Why Choose WTS Valves?
WTS is a trusted name in valve manufacturing, offering precision-engineered products for critical infrastructure. With ISO-certified production, advanced testing protocols, and a customer-first approach, WTS delivers valves that meet global performance and quality benchmarks.
From initial consultation to after-sales support, WTS ensures every customer receives not just a valve—but a long-term flow control solution.
Butterfly valves are key components in many sectors like water treatment, HVAC systems, and chemical processing. They are characterized for their unfussy structure, small size, and rapid shut-off feature. Nonetheless, the process of selecting the appropriate butterfly valve type plays a critical role in the system’s effectiveness, safety, and durability. In this guide, we will specify three types, namely U Type Butterfly Valve, Extension Stem Butterfly Valve, and PN16 Butterfly Valve, and discuss the applications of each.
1. U Type Butterfly Valve
The U Type Butterfly Valve is a popular choice in industrial applications that require a tight shut-off and reliable performance. It features a U-shaped body design, offering high strength and durability, making it suitable for handling water, gas, and chemical pipelines.
Key features:
High sealing performance
Corrosion-resistant materials
Lightweight and compact design
Simple installation and maintenance
This type of butterfly valve is ideal for industries like water treatment, chemical processing, and HVAC systems, where reliable flow control and space-saving solutions are important.
2. Extension Stem Butterfly Valve
For applications where valves need to be operated from a distance or in deep underground installations, the Extension Stem Butterfly Valve is the perfect choice. It comes with an extended stem that allows easy manual or automated operation, even in hard-to-reach places.
Key features:
Customizable stem length
Suitable for buried or elevated pipeline systems
Compatible with manual, electric, or pneumatic actuators
Available in various pressure ratings and sizes
This valve is commonly used in water distribution, fire protection systems, and industrial piping networks that require remote valve operation for safety and convenience.
3. PN16 Butterfly Valve
When working with higher-pressure systems, the PN16 Butterfly Valve offers the strength and reliability required. “PN16” indicates that the valve can handle a nominal pressure of 16 bar, making it suitable for medium to high-pressure pipelines.
Key features:
Double eccentric design for reduced wear and tight sealing
Worm gear operation for precise flow control
High-performance sealing suitable for water, oil, and gas
Durable ductile iron construction
This type of butterfly valve is widely used in industries like oil and gas, power generation, and large-scale water supply projects, where maintaining pressure integrity is critical.
Conclusion
Selecting the right butterfly valve depends on the application, pressure requirements, and installation environment.
Choose a U Type Butterfly Valve for general-purpose use with reliable sealing and compact design.
While selecting the most suitable type of butterfly valve for industrial flow control systems can be challenging, the truth is that they are essential. The design and applications of the Triple Eccentric Butterfly Valve, the Offset Butterfly Valve, and the Center Line Butterfly Valve make them different from each other. This guide identifies their differences in detail, lists their respective advantages, and points out their ideal use cases in order to give you the necessary information to choose the right valve.
1. Triple Eccentric Butterfly Valve: Advanced Design for Demanding Applications
The Triple Eccentric Butterfly Valve is engineered for high-performance sealing in extreme conditions. Its three-layer offset design eliminates friction during operation, ensuring a long service life and bubble-tight shutoff.
Key Features:
Metal seat construction – Suitable for high-temperature and high-pressure environments
Zero leakage – Ideal for critical applications where sealing is essential
Corrosion-resistant materials – Works with aggressive media such as steam, acids, and hydrocarbons
Best Applications:
Oil and gas pipelines
Chemical and petrochemical processing
Power plants and steam systems
For industries requiring maximum reliability under harsh conditions, the Triple Eccentric Butterfly Valve is the optimal solution.
2. Offset Butterfly Valve: Enhanced Performance for General Industrial Use
The Offset Butterfly Valve (also known as double eccentric) features a disc that is offset from the valve seat, reducing wear and improving sealing compared to standard butterfly valves.
Key Features:
Reduced friction – Extends valve lifespan
Improved sealing – Better performance than center line designs
Versatile operation – Handles a wide range of pressures and temperatures
Best Applications:
Water treatment plants
HVAC systems
General industrial fluid control
For cost-effective yet reliable flow control, the Offset Butterfly Valve is an excellent choice.
3. Center Line Butterfly Valve: Simple and Economical for Low-Pressure Systems
The Center Line Butterfly Valve is the most basic type, with a disc that rotates around a central axis. It is widely used in applications where tight sealing is not critical.
Key Features:
Compact and lightweight – Easy to install and maintain
Cost-effective – Ideal for budget-conscious projects
Suitable for low-pressure systems – Works well with water, air, and non-corrosive fluids
Best Applications:
Municipal water supply
Irrigation systems
Ventilation and air handling
For low-pressure, non-critical applications, the Center Line Butterfly Valve provides a simple and economical solution.
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