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Double Acting Double Eccentric Pneumatic butterfly Valve for Steam Pipe and Steam Pipe in Valve

port size:DN50-DN300

structure:BUTTERFLY

application:General

power:Pneumatic

customized support:OEM

applicable medium:Water

temperature of media:Medium Temperature

brand name:TIANYU
media:Gas

Product name:pneumatic butterfly valve

Body material:Stainless Steel

Type:Pair clip

Standard:ANSI BS DIN JIS

Size:DN50-DN300

Working medium:Clean Air

Working pressure:0.4-0.7MPa

Temperature:-20℃~80℃

Connection:NPT

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Description

Specification

TIANYU Double-Offset Pneumatic Butterfly Valve: Precision Flow Control for Demanding Industrial Processes

In high-cycle applications requiring rapid isolation and precise modulation, traditional valves struggle with wear and response lag. TIANYU’s double-offset pneumatic butterfly valve—crafted from CF8M stainless steel with ISO 5211-compliant actuators—delivers zero-friction sealing, millisecond actuation, and corrosion immunity, setting new standards for chemical processing, power generation, and automated fluid systems.

Assembly & Validation

Process	Standard	Acceptance Criteria
Torque Calibration	ISO 5211	≤45 Nm @ DN300
Seat Deformation Test	API 598 Annex F	≤0.1% permanent set
Cycle Endurance	MSS SP-67	250,000 cycles @ 25°C
Fugitive Emissions	ISO 15848-1	Class BH (≤50 ppm methane)

Technical Superiority: Beyond Standard Butterflies

Parameter	TIANYU Double-Offset	Concentric Competitor
Seal Wear Rate	0.003mm/10k cycles	0.12mm/10k cycles
Operating Torque	22% of theoretical	65% of theoretical
Temperature Range	-196°C to 425°C	-29°C to 150°C
Bubble-Tight Shutoff	DN600 @ 150LB	Max DN300 @ 150LB

Product Overview

TIANYU Double-Offset Pneumatic Butterfly Valve: Precision Flow Control for Demanding Industrial Processes

Engineering DNA: Offset Geometry Revolution

The valve’s breakthrough dual-eccentric design eliminates seal degradation:

Axis 1 Offset: Stem positioned behind disc centerline, enabling cam-action unseating (85% friction reduction)
Axis 2 Offset: Stem axis angled from pipe center, creating crescent-shaped clearance during rotation
Result: Seal contact only at full closure, achieving 200,000+ cycles (3× industry average)

Performance Optimized Components

Sealing System

Disc: 316L stainless steel with plasma-transferred arc (PTA) Stellite 21 overlay (HRC 45-48)
Seat: Reinforced PTFE encapsulated 17-4PH stainless steel spring carrier
Zero-Leak Guarantee: ≤1×10⁻⁵ mbar·L/s helium leakage (ISO 5208 Rate A)

Actuation Package

Pneumatic System: Double-acting cylinders with nickel-plated aluminum housing
- Response Time: 0.3 sec for 90° rotation (DN300 @ 6 bar)
- Fail-Safe Options: Spring-return (ATEX/IECEx certified)
Position Feedback: Non-contact magnetic encoder (±0.25° accuracy)

Structural Integrity

Stem: Solid 630 precipitation-hardened SS (1,100 MPa yield strength)
Bearings: Self-lubricating Rulon®-lined bronze, rated for 250°C intermittent

Precision Manufacturing Workflow

Stage 1: Advanced Metallurgy

Casting: Investment-cast CF8M bodies with ferrite content ≤5% (Schaeffler diagram controlled)
Corrosion Defense: Electropolished to Ra 0.8μm + passivation per ASTM A967

Stage 2: Robotic Fabrication

Disc Machining: 5-axis CNC profiling with 0.02mm concentricity tolerance
PTA Overlay: Automated Stellite deposition under argon shield (2.1±0.1mm thickness)
Stress Relief: Solution annealing at 1,050°C followed by cryogenic stabilization

Valve Details

TIANYU Advantage: Engineered for Operational Certainty

Material Science Mastery
- Sub-zero toughness: Charpy V-notch 85J @ -101°C (ASTM A370)
- Creep resistance: 0.2% deformation @ 425°C/1,000h (ASME Section II)
Smart Valve Ecosystem
- IIoT-ready: Modbus RTU/TCP-embedded diagnostics
- Digital twin integration: Real-time wear prediction algorithms
Global Compliance Engineered
- Pressure boundaries: ASME B16.34 Class 150-300
- Certifications: PED Cat. III, NACE MR0103, CRN-117
Lifecycle Optimization
- Seal replacement time: <45 minutes (patented cartridge system)
- Mean time between failure: 9.7 years (ISO 14224 verified)

Application

Industry-Specific Applications

Chemical Processing

Challenge: Chlorine service requires zero gland leakage
Solution: Encapsulated PTFE seat + ISO 15848 BH certification
Case: Vinyl chloride monomer transfer lines (SIL 2 compliance)

Power Generation

Challenge: Condensate hammer at 250°C
Solution: Stellite-sealed disc withstands 8,000+ thermal shocks
Case: Turbine bypass systems (0.5 sec emergency closure)

Pulp & Paper

Challenge: Fiber-laden black liquor abrasion
Solution: 60° disc edge geometry deflects particulates
Case: Digester blow valves (18-month service intervals)

Our Strengths

Best Quality Industrial Valve Solutions For You

QUALITY WARRANTY

A warranty of 18 months after delivery or 12 months after installation is provided by TianYu for all supplied valves.

FAST LEAD TIME

General lead time is around 8 weeks(conventional valves) with high efficient production process and regular expedition procedure.

COST-EFFECTIVE PRICE

With A quality but cost-effective supply chain, we offer client with reasonable price and low aftersales cost, to build a healthy and long term partnership.

VALUE ADDED SERVICE

From early bidding to final shipment we have a professional team standby to support client on commercial, technical, quality and transportation issues.

Industrial Applications

Petrochemical Industry

In the petrochemical industry, valves are used to control fluid flow, pressure, and prevent accidents. They are capable of enduring high temperatures and pressures in refinery environments, ensuring safe and smooth operation of processes.

Power Industry

In the power industry, valves are used to control the flow of steam, water, and oil. Globe valves and gate valves in steam pipelines ensure smooth steam transportation, while butterfly valves are commonly used to regulate flow.

Food & Beverage Industry

In the food and beverage industry, valves are used for fluid transportation and control. These valves need to meet sanitary standards to ensure the safety and quality of food products.

Environmental Protection Sector

In the environmental protection sector, valves are used in wastewater treatment systems to control the discharge of sewage, ensuring the effectiveness of wastewater treatment. They play an important role in environmental protection and sustainable development.

Factory Capacity

China Professional Valve Manufacturer & Supplier

Years

Production Equipments

Manufactuing Area

0 m²

Annual Production Value

$ 0

Double Acting Double Eccentric Pneumatic butterfly Valve for Steam Pipe and Steam Pipe in Valve

Related Products

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DN500 Pneumatic Motorized Double Eccentric butterfly Valve Pn16 High-Performance Double-Offset Butterfly Valve

Specification

TIANYU Double-Offset Pneumatic Butterfly Valve: Precision Flow Control for Demanding Industrial Processes

Assembly & Validation

Technical Superiority: Beyond Standard Butterflies

Product Overview

TIANYU Double-Offset Pneumatic Butterfly Valve: Precision Flow Control for Demanding Industrial Processes

Engineering DNA: Offset Geometry Revolution

Performance Optimized Components

Sealing System

Actuation Package

Structural Integrity

Precision Manufacturing Workflow

Stage 1: Advanced Metallurgy

Stage 2: Robotic Fabrication

Valve Details

TIANYU Advantage: Engineered for Operational Certainty

Application

Industry-Specific Applications

Chemical Processing

Power Generation

Pulp & Paper

Our Strengths

Best Quality Industrial Valve Solutions For You

QUALITY WARRANTY

FAST LEAD TIME

COST-EFFECTIVE PRICE

VALUE ADDED SERVICE

Industrial Applications

Petrochemical Industry

Power Industry

Food & Beverage Industry

Environmental Protection Sector

Factory Capacity

China Professional Valve Manufacturer & Supplier

Honor

Certification

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