Specification

DN100 PN16 Manual Turbine Triple Eccentric Multi-Layer Hard Seal Flange Butterfly Valve

I. Product Overview

TIANYU manual turbine flange butterfly valve integrates triple eccentric structure with multi-layer hard sealing, engineered for rigorous industrial flow control. Its multi-layer metal sealing design enhances tightness across pressure and temperature fluctuations, while the triple offset minimizes friction during operation. Constructed with robust cast materials and flange connections, it handles air, gas, oil, and water, delivering reliable shut-off in industrial pipelines, heating systems, and fluid transmission networks where zero leakage and durability are critical.

II. Key Attribute Parameters

Size Range: DN50~DN600 (2″~24″), covering small to large-diameter pipelines to suit process loops and industrial transmission lines.
Pressure Rating: PN16 (≤1.6MPa), with structural reinforcement to withstand pressure surges in low to medium-pressure systems.
Temperature Range: -40℃~400℃, supported by multi-layer metal seals that resist oxidation and deformation under high thermal stress.
Material Configuration:
- Valve Body: Cast carbon steel (WCB) or ductile iron, with thickened walls for structural rigidity under pressure and temperature cycles.
- Seal Structure: Multi-layer hard seal (stainless steel + alloy) with alternating rigid and elastic metal layers, ensuring compensation for thermal expansion.
- Disc & Stem: Disc in 304 stainless steel with precision-machined sealing edges; stem in 1Cr13 alloy for corrosion resistance and anti-bending strength.
Connection Type: Flange (RF per ANSI B16.5), with bolt holes aligned to pipeline standards for secure, leak-free integration.
Drive Mode: Manual turbine with 30:1 transmission ratio, reducing operating torque by 60% for easy handling of large-diameter valves.
Standards Compliance: Design per API 609, GB/T 12238; testing per API 598, ensuring bubble-tight shut-off (ANSI FCI 70-2 Class IV).

Product Overview

III. Structural Features

Triple Eccentric Design: Three offsets (stem axis, disc center, seat cone) eliminate contact between disc and seat during 90% of opening/closing travel, reducing wear and lowering actuation torque—critical for extending seal life in frequent-use systems.
Multi-Layer Hard Sealing: 3~5 layers of metal (304 stainless steel + Stellite) form a labyrinth seal, with each layer acting as a secondary barrier. Elastic metal gaskets between layers compensate for thermal expansion, maintaining tightness from -40℃ to 400℃.
Manual Turbine Drive: Gear-driven mechanism amplifies force, enabling one-person operation of DN600 valves. The turbine housing (cast iron) is dust-proof and waterproof (IP65), suitable for outdoor or dusty industrial environments.
Anti-Blowout Stem: Integral stem with a backseat design prevents ejection under high pressure, while a stainless steel pin locks the stem to the disc, enhancing operational safety.
Streamlined Disc: Aerodynamic profile reduces pressure drop by 15% compared to standard butterfly valves, improving energy efficiency in high-flow systems.

IV. Manufacturing Processes

Material Inspection: Castings undergo ultrasonic testing to eliminate internal defects; 304 stainless steel and Stellite alloys are verified via spectral analysis (Cr ≥18% for 304).
Precision Machining: CNC grinders shape the triple eccentric disc to ±0.02mm tolerance, ensuring uniform clearance with the seat. Multi-layer seals are laser-cut and pressed to ensure layer alignment.
Seal Assembly: Layers are bonded with high-temperature adhesive (resistant to 450℃) and riveted to the seat, then lapped to a mirror finish (Ra ≤0.8μm) for tight contact with the disc.
Testing: Each valve undergoes:
- Hydrostatic test (1.5×PN16) for 30 minutes to check body integrity.
- Gas tightness test (0.6MPa nitrogen) with leakage ≤0.1×10⁻⁶ mL/s.
- 1000-cycle operation test to verify turbine smoothness and seal stability.

Valve Details

V. Product Advantages

Superior Sealing: Multi-layer metal design achieves zero leakage even after thermal cycling, outperforming single-layer seals in high-temperature steam or corrosive gas applications.
Extended Service Life: Triple offset reduces seal wear by 50%, while multi-layer construction ensures 15+ years of service in typical industrial conditions—lowering replacement costs.
High-Temp Adaptability: Withstands 400℃, suitable for superheated steam systems where soft seals degrade, and resists cold brittleness at -40℃ for cryogenic applications.
Easy Operation: Turbine drive reduces effort, making it ideal for manual control in remote or hard-to-reach locations (e.g., rooftop pipelines, industrial basements).
Cost-Effective: Combines the performance of high-end valves with lower manufacturing costs, offering a balance of reliability and affordability for mid-range industrial systems.

Application

VI. Application Fields

Power Generation: Controls high-temperature steam in boiler feed lines and turbine bypass systems, with multi-layer seals resisting oxidation from superheated steam.
Petrochemical Auxiliary Lines: Regulates light hydrocarbons and process gases in refineries, where zero leakage prevents hazardous emissions.
Industrial Heating: Manages thermal oil and hot water in district heating networks, adapting to daily temperature fluctuations from 50℃ to 300℃.
Metallurgy: Handles high-temperature air and cooling water in steel mill rolling lines, withstanding abrasive particles in industrial fluids.