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

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

Product Attribute: 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
INFO@TYFLUIDGROUP.COM

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

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.

Engineering DNA: Offset Geometry Revolution

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

  1. Axis 1 Offset: Stem positioned behind disc centerline, enabling cam-action unseating (85% friction reduction)

  2. 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

  1. Disc Machining: 5-axis CNC profiling with 0.02mm concentricity tolerance

  2. PTA Overlay: Automated Stellite deposition under argon shield (2.1±0.1mm thickness)

  3. Stress Relief: Solution annealing at 1,050°C followed by cryogenic stabilization

Valve Details

TIANYU Advantage: Engineered for Operational Certainty

  1. 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)

  2. Smart Valve Ecosystem

    • IIoT-ready: Modbus RTU/TCP-embedded diagnostics

    • Digital twin integration: Real-time wear prediction algorithms

  3. Global Compliance Engineered

    • Pressure boundaries: ASME B16.34 Class 150-300

    • Certifications: PED Cat. III, NACE MR0103, CRN-117

  4. 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)

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