Electric Triple Offset Flange Butterfly Valve DN50 to DN2600 Body Carbon Steel Stainless Steel Seat Hardfaced Alloy Bidirectional Zero Leakage Butterfly Valve

Product Description

Product Description

The Main Categories of This Valve The electric triple-offset flange butterfly valve is a durable, energy-efficient quarter-turn control valve with a body, disc, and electric actuator. Its triple-offset design enables frictionless disc-seat operation, ensuring tight bidirectional metal sealing with zero leakage. The intelligent actuator accepts standard signals for precise PID control, making it ideal for high-temperature, high-pressure, and corrosive applications.
Catergory of Valve	Structural Classification	Connection	Operation Method	Other Addition	Remarks
Butterfly Valve	Triple Offset	Double Flange	Electric Actuator
The characteristics of each aspect are detailed in the following content.

Electric Actuated Triple offset Butterfly Valve

1) Triple-offset geometry: Combines radial, axial, and conical angle offsets, allowing the disc to disengage from the seat immediately upon opening, eliminating friction and extending seal life.

 

2) Metal hard-sealing design: Both seat and disc sealing surfaces are hardfaced with wear resistant alloys, suitable for high temperature, high pressure, and abrasive media.

 

3) Bidirectional pressure capability: The unique offset and seat angle ensure reliable tight shutoff in both flow directions, meeting bi-directional sealing requirements.

 

4) Integrated electric actuator: For small size valves, the actuator connects directly to the stem without an additional gearbox; for large sizes, a worm gearbox is added. Supports remote on-off control, 4-20mA analog modulation, and self-diagnostics..

 

5) Compact body construction: Flange connections follow standard dimensions, offering light weight and small footprint for easy installation, with self-lubricating bearings for low operating torque.

Bottom

Front

Smart Eelctric Actuator

Specification of Basic Valve

Triple-offset butterfly valve

Triple-offset butterfly valve uses three geometric offsets (axial, radial, and angular cone axis) to enable rapid disengagement/engagement of the disc from the seat during operation, drastically reducing friction and wear while achieving near-zero leakage with metal-to-metal sealing. Compact, heatresistant, and highpressure capable, it offers long service life and low torque, making it ideal for demanding services in oil, chemical, and power industries.

Structural Characteristics

1) Axial offset: stem axis deviates from valve centerline, creating a cam effect during disc movement to reduce initial seating force.

2) Radial offset: stem axis deviates from pipe centerline, ensuring rapid disc seat separation during rotation, minimizing friction travel.

3) Angular (cone) offset: sealing cone axis is angled to the flow passage axis, enabling uniform wedging at closure and instant release at opening.

4) Metal hard sealing: laminated or solid metal to metal sealing pairs, no soft materials, resistant to high temperature, erosion, and corrosive media.

5) Bidirectional pressure capability: geometric design allows equal sealing performance in both flow directions, no mandatory installation orientation.

6) Flexible actuation: compatible with manual, pneumatic, electric, or hydraulic actuators, plus smart positioners and fieldbus, enabling remote modulation, on/off control, and seamless integration with DCS/PLC systems.

Technical Specifications (Custom configurations available upon request.)
Valve Body material	Carbon Steel WCB, A105, Stainless Steel SS304, SS316, SS316L, duplex steel 2205, 2507, Bronze C95400, C95800, etc.
Valve Disc material	Carbon Steel WCB, A105, Stainless Steel SS304, SS316, SS316L, duplex steel 2205, 2507, Bronze C95400, C95800, etc.
Valve Seat material	stainless steel, hard alloys, Inconel, Stellite, etc
Pressure Rating	PN0.6~PN6.3 MPa, or Class 150~Class 1500
Connecting Size	2"~96", DN50~DN2400 or larger
Connecting type	Flange, Wafer, Lug, Welded etc...
Applicable Temp	typically from cryogenic (e.g., -196°C) to high temperature (e.g., +600°C or up to +815°C), depending on materials
Applicable Medium	Water, Steam, Oil, Natural gas, etc
Sealing & Leakage Class	Metal-to-metal seating with bidirectional or unidirectional bubble-tight shut-off, up to Class VI per AP 598/ISO 5208.
Actuator & Accessories	Compatible with manual, pneumatic, electric, or hydraulic actuators, plus positioners, solenoid valves, limit switches, etc., for remote control and system integration
Design & Testing Standards	Conforming to 609, EN 593, ASME B16.34, AP 598, etc

Application

(1) Oil, Gas & Chemical: Used in long-distance crude oil and refined product pipelines, high-temperature catalytic cracking and hydrocracking in refineries, and handling corrosive fluids like acids, alkalis, and solvents.

(2) Power & Energy: Applied in boiler main steam and reheat steam lines in thermal plants, cooling systems in nuclear stations, gas turbine inlet/exhaust isolation, and district heating networks.

(3) Metallurgy, Mining & Pulp/Paper: Used in blast furnace gas lines, slurry transport, high-temperature caustic liquor in alumina production, and corrosive fluids in pulp cooking and bleaching stages.

(4) Cryogenic & Ultra-low Temperature Services: Suitable for LNG terminals, liquefied natural gas storage and transport systems, and air separation units handling liquid nitrogen/oxygen at -196°C.

(5) Marine & Offshore Engineering: Applied in ballast water systems, fuel oil transfer lines, bilge discharge, as well as flare vent and firewater systems on offshore platforms.

(6) High-pressure Gas & Storage Peak-shaving: Used in injection and production pipelines of underground natural gas storage facilities, compressed air energy storage systems, and high-pressure nitrogen/hydrogen transmission lines.

Connection of this Valve

The Connection of this Valve is Double Flange Connection

Double Flanged Connection

Features: Integral standard flanges at both ends; rigidly bolted with gaskets to pipe flanges.
Advantages: High rigidity, reliable sealing, strong bidirectional pressure capability; easy alignment during installation.
Limitations: Heavier, longer, and most costly among common types.
Applications: Large diameter high pressure lines, steam systems, and critical process shut off valves.

Our valve products (including butterfly valves, ball valves, gate valves, globe valves, check valves, etc.) are designed to comply with a comprehensive range of flange standards and pressure ratings, ensuring compatibility with diverse regional requirements and service conditions worldwide:

1. Chinese National Standards (GB/T 9112~9124)

 

This standard series integrates both the European PN system and the American Class system, comprising 13 detailed specifications.

 

PN Ratings: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, PN160, PN250, PN320, PN400

 

Class Ratings: Class 15, Class 300, Class 600, Class 900, Class 1500, Class 2500

 

2. American Standards (ASME/ANSI)

 

Widely adopted in high-pressure and high-temperature applications such as petrochemical and power industries.

 

ASME B16.5: Class 150, Class 300, Class 400, Class 600, Class 900, Class 1500, Class 2500

 

ASME B16.47: Class 150, Class 300, Class 400, Class 600, Class 900 (for large-diameter flanges)

 

3. European Standards (EN/DIN)

 

Commonly used in European and international projects, based on the PN system.

 

EN 1092-1: PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40

EN 593 (Product standard for butterfly valves): PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, as well as Class 150 and Class 300 for flange connections

 

4. International Standards (ISO)

 

Internationally recognized reference system for flange connections.

 

ISO 7005-1: Covers both PN and Class series flange standards

ISO 10631 (General metal butterfly valve standard): PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, and Class 125, Class 150, Class 300

 

5. Japanese Standards (JIS)

 

Suitable for Japanese-designed equipment or projects exporting to Japan.

 

JIS B2220: 5K, 10K, 16K, 20K, 30K, 40K

 

6. Other Chinese Industry Standards

 

Chemical Industry Standards (HG/T): HG/T 20592 (PN ratings), HG/T 20615 (Class ratings)

 

Machinery Industry Standards (JB/T): JB/T 79~6 series

Contact for more detail if above is not mentioned. 

Operation of This Valve

Operation of This Valve is Electric Actuator

Overview

An angular stroke electric actuator is a critical drive device in industrial automation, specifically designed for valves requiring rotary motion. It receives standard electrical signals from a control system (e.g., DCS, PLC) and converts them into mechanical angular displacement to modulate flow or achieve on/off control, serving as the final control element in a process loop.

 

Classification

Based on output motion, it is divided into part-turn and multi-turn types. Angular stroke actuators are characterized by an output shaft rotation of less than one full turn (typically 0°~90°), making them suitable for ball, butterfly, and plug valves. According to mounting methods, they can be further classified as direct-mounting types, where the output shaft connects directly to the valve stem, and base-crank types, which use a linkage mechanism.

 

Key Features

Key features include a compact structure and high output torque, capable of delivering up to 300,000 N·m to overcome valve resistance. Modern intelligent models integrate microprocessors, offering precise closed-loop control, non-intrusive commissioning, bus communication, and self-diagnostics. They also typically feature mechanical and electronic dual limit switches, torque overload protection, and manual override mechanisms to ensure safe and reliable operation.

Main Application Scenarios

Angular stroke electric actuators are widely used in petrochemical, power generation, water treatment, and metallurgical industries. Typical applications include high-temperature flue gas butterfly valve control in FCC units, large-diameter butterfly valve operation in power plant cooling water systems, remote regulating ball valves in municipal water distribution networks, and automated sanitary angle-seat valves in food/pharmaceutical cleanrooms. Explosion-proof and waterproof versions also play critical roles in ship ballast water treatment and subsea pipeline emergency shutdown systems, meeting high-reliability and fast-response requirements under harsh conditions.

Compact Electric Actuator

LQ Electric Actuator

Multi-turn Electric Actuator

The compact angular stroke electric actuator is small and lightweight, about 1/3 the size of conventional models. It features integrated gearing for high accuracy and low backlash. Available in on-off, modulating, and smart types, it accepts 4-20mA signals for precise control, with built-in overload protection for reliable operation.

The LQ-type quarter-turn electric actuator features a double worm-gear drive for high torque, low noise, and mechanical self-locking. Its compact design integrates thermal overload protection and mechanical stops for safe operation. Available in basic, integral, and smart control types, with IP67 protection (IP68 optional) and explosion-proof option.

Multi-turn electric actuators deliver multiple output shaft revolutions, converting rotation into linear motion via threaded connections for gate and globe valves. High torque and thrust with mechanical self-locking. Built-in torque/travel protection, manual handwheel, on-off/modulating/intelligent types, IP67, explosion-proof optional.

Packaging & Shipping

Our key points to keep in mind when packaging valve products:

1. Protection Against Contamination
Valves must be sealed at all openings (flanges, threaded ends, or socket ends) with appropriate caps, plugs, or covers. This prevents dust, dirt, moisture, and foreign particles from entering the internal cavities and seating surfaces, which could compromise performance.
 
2. Corrosion Prevention
Apply a rust-preventive coating or volatile corrosion inhibitor (VCI) film to all machined and unpainted metal surfaces. Desiccant bags should be placed inside sealed plastic liners to control humidity, especially for long-term storage or ocean freight.
 
3. Cushioning and Shock Absorption
Use adequate padding (e.g., foam, bubble wrap, or corrugated cardboard inserts) to protect actuators, positioners, handwheels, and other protruding components. Fragile accessories like solenoid valves or limit switches require additional isolation from the main valve body.
 
4. Secure Fixation Inside the Container
The valve must be firmly blocked and braced within the outer packaging (wooden crate, corrugated box, or metal rack) using wooden chocks, metal brackets, or strapping bands. This prevents shifting, rolling, or impacting during handling and transit, which could damage threads, flanges, or stem seals.
 
5. Weight Distribution and Lifting Points
For heavy or large-diameter valves, ensure the packaging design evenly distributes weight and provides clear, reinforced lifting points (e.g., sling slots or fork-lift pockets). Mark the center of gravity on the outside to avoid tipping.
 
6. Clear and Durable Labeling
Attach weather-resistant labels showing:
Valve model, size, pressure class, and material grade
Purchase order number and batch/lot code
Handling instructions (e.g., "Do Not Drop," "This Side Up," "Use Spreader Bar")
Weight and center-of-gravity markings
 
7. Compliance with Export/Import Regulations
For international shipments, use Non solid wood material without fumigation wooden pallets/boxes. Include proper hazardous goods declarations if the valve contains residual testing fluids, lubricants, or nitrogen pre-charge.

Some Cooperative Clients

Select accessory brands

Sino pec Nanjing Chemical Industrial Park

Zhejiang Shaoxing Sanjin Petrochemical Project

Hot air system for the new energy project at Pudong Airport

........

In our valves, internationally renowned brand actuators, solenoid valves, limit switches, filter pressure reducing valves, positioners, and air lock valves are selected according to the needs of customers or working conditions to ensure high-quality operation of our valves on site.

More Catagory of Butterfly Valve

Concentirc Butterfly Valve

Triple Offset Butterfly Valve

Double Eccentric Butterfly Valve

More Kind of Valves We Have....

Following Valves we can produce or sourcing.  Click your request catagory to study the detail items. Or contact us for easy communication.  Note: The link is currently being perfected. If you are unable to navigate to the corresponding page after clicking, please contact us directly for information.
Butterfly Valve	Ball Valve
Triple Offset Butterfly Valve	Trunnion Ball Valve
Double Eccentric Butterfly Valve	Floating Ball Valve
High Performance Butterfly Valve	Top Entry Ball Valve
Concentric Butterfly Valve	DBB ball valve
Ventilation Butterfly Valve	Multi-Way Ball Valve
Fluorine-lined Butterfly Valve	Full Welded Ball Valve
Ceramic-lined Butterfly Valve	Fluorine-lined Ball Valve
Sanitary Butterfly Valve	Ceramic-lined Ball Valve
Fire Service Butterfly Valve	Sanitary Ball Valve
Marine Butterfly Valve	Fire Service Ball Valve
Jacket Butterfly Valve	Marine Ball Valve
	Jacket Ball Valve