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API 6D ASTM Carbon Steel Triple Eccentric Hard Seal Flange High-Temperature Butterfly Valve for Water

Connection Forml:Lug Support

Structure:Three-Eccentric Sealing

alve Stem:Normal

Work Pressure:Mid-Pressure (2.5mpa< Pn <6.4mpa)

Working Temperature:Medium Temperature (120°C<T<450°C)

Material of Seal Surface:Metal Hard Sealed

Valve Body:Casting

Standard:ISO/API

Application:Industrial Usage, Water Industrial Usage, Household Usage

Body:Wcb/Stainless Steel/Brass

Disc:Wcb/Stainless Steel/Brass

Seat:CF8/CF8m/CF3m/Alloy Steel

Operator:Lever/Gear/Bare Shaft

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Description

Specification

TIANYU Stainless Steel High-Temperature & High-Pressure Resistant Multi-Level Metal Hard Sealing Butterfly Valve: A Powerful Tool for Industrial Fluid Control in Harsh Conditions

In industrial scenarios such as petrochemical, power energy, and metallurgy that involve high temperatures and pressures, valves face strict requirements for sealing performance, heat resistance, and structural strength. The TIANYU stainless steel high-temperature & high-pressure resistant multi-level metal hard sealing butterfly valve, with its innovative design and exquisite craftsmanship, becomes a reliable choice for complex working conditions, providing efficient and safe solutions for industrial fluid control.

I. Analysis of Core Product Features

(A) Multi-Level Metal Hard Sealing Structure

TIANYU’s butterfly valve adopts a unique multi-level metal hard sealing design, composed of a disc, seat, and multiple layers of metal sealing pairs. The seat uses Stellite alloy surfacing technology, with a surface hardness of up to HRC60, offering excellent erosion and wear resistance. The disc and seat are precisely matched through a conical surface, forming a multi-level sealing line that achieves zero leakage under high temperature and pressure. Tested at PN40 pressure and 425℃, the leakage rate is below 1×10⁻⁹m³/s, meeting the API 598 Class VI sealing standard, suitable for controlling flammable, explosive, and highly corrosive media.

(B) High-Temperature & High-Pressure Resistant Material System

Component	Material	Performance Advantages
Body/Disc	316L stainless steel (CF3M)	Molybdenum content increased to 2.2%-3.0%, resistant to 650℃, 40% enhanced chloride corrosion resistance
Stem	25Cr2MoV alloy steel	Quenched, tempered, and nitrided to hardness HV700, tensile strength ≥1000MPa, blowout-proof design compliant with ASME B16.34
Sealing Pair	Stellite alloy + Inconel alloy	Maintains excellent sealing and wear resistance at high temperatures (600℃), service life >8 years

(C) Double Eccentric + Conical Sealing Design

Combining the double eccentric structure with a conical sealing surface, the disc disengages from the seat instantly during opening, reducing friction and wear. During closing, the conical sealing surface gradually fits as the angle changes, forming a self-tightening seal—the higher the pressure, the better the sealing effect. This design reduces the opening/closing torque by 30% and avoids jamming caused by high-temperature expansion, ensuring long-term stable operation.

II. Key Technical Attributes

Parameter Category	Technical Indicators	Expansion Options
Size Range	DN50-DN800 (2″-32″)	Customizable extra-large DN1000 (negotiable)
Pressure Rating	PN16/PN25/PN40 (up to 4.0MPa)	American Standard Class 150-Class 600 (optional)
Applicable Temperature	-20℃-650℃ (standard type)	Special customization for low-temperature -196℃ (liquid nitrogen) and high-temperature 800℃
Connection Type	Flange connection (GB/T 9113, ANSI B16.5)	Butt-welded, wafer-type interface customization
Compliance Standards	GB/T 12238, ISO 5281	API 609, CE, fire certification (API 607)

Product Overview

III. Precision Manufacturing Processes and Quality Control

(A) Manufacturing Process Analysis

Body Molding: The 316L stainless steel body is produced by centrifugal casting, resulting in a dense and uniform internal structure. Double testing by ultrasonic testing (UT) and radiographic testing (RT) ensures no shrinkage cavities, pores, or other defects. High-temperature solution treatment relieves internal stress and improves material toughness.
Sealing Surface Processing: The seat is ground by a five-axis CNC grinder with flatness error ≤0.01mm and surface roughness Ra≤0.4μm. The Stellite alloy surfacing layer is ≥3mm thick, aged at high temperature to ensure hardness and wear resistance.
Assembly and Testing: High-precision assembly is completed in a dust-free workshop to ensure component clearances are controlled within 0.02mm. Each valve must pass a 1.5x nominal pressure hydrostatic strength test (30-min hold), a 1.1x air pressure seal test (helium leak detection), and a sampling of 100,000 opening/closing life tests.

(B) Quality Assurance System

Material Traceability: Batch numbers of key components can be traced to heat numbers and chemical composition reports, supporting third-party PMI material testing.
Third-Party Certification: Provides pressure resistance, high-temperature, and sealing performance test reports from institutions like SGS and BV.
System Certification: Certified by ISO 9001 quality management system, with high-pressure models complying with API 609 standards.

Valve Details

V. TIANYU Brand Customization Advantages

With over 15 years of industrial valve manufacturing experience, TIANYU offers end-to-end customized services:

In-Depth Technical Customization: Supports non-standard pressure ratings (up to PN100), extreme temperatures (-196℃-800℃), special materials (Hastelloy, duplex steel), and explosion-proof designs (Ex d IIC T6), providing 3D modeling and CFD fluid simulation analysis.
Efficient Delivery Capability: Regular orders delivered within 30 days, small batch customization (MOQ 1 units) shortened to 15 days, and a 72-hour emergency channel for urgent orders.
Global Service Network: Offers an 18-month warranty, 24/7 response from three major service centers covering APAC, Europe, and North America, 48-hour airfreight for critical spare parts, and supporting digital installation manuals and remote operation maintenance.

Application

IV. Product Application Scenarios

Petrochemical Industry: Controls media like hydrogen and ethylene in high-corrosion, high-temperature, and high-pressure pipelines of cracking units and hydrogenation reactors to prevent leakage risks.
Power Energy Sector: Enables quick on/off and flow regulation for main steam pipelines (10.0MPa/540℃) in power plants, with high-temperature resistant materials ensuring long-term stable operation.
Metallurgy Industry: Isolates and controls blast furnace gas and oxygen pipelines (3.0MPa/600℃), with multi-level sealing effectively resisting medium erosion.
Coal Chemical Industry: Provides safe shut-off for syngas pipelines (4.0MPa/550℃) in gasifiers, with zero-leakage design ensuring production safety.

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

API 6D ASTM Carbon Steel Triple Eccentric Hard Seal Flange High-Temperature Butterfly Valve for Water

Related Products

DN250 PN16 Pneumatic High-Temp Hard Sealed Triple Eccentric Butterfly Valve

DN100 300LB High-Temp Metal-Seated Butterfly Valve

API 6D ASTM Carbon Steel Triple Eccentric Hard Seal Flange High-Temperature Butterfly Valve for Water

DN100 Class 300 310S Metal Seal Heat Sink High-Temperature Ball Valve

Specification

TIANYU Stainless Steel High-Temperature & High-Pressure Resistant Multi-Level Metal Hard Sealing Butterfly Valve: A Powerful Tool for Industrial Fluid Control in Harsh Conditions

I. Analysis of Core Product Features

(A) Multi-Level Metal Hard Sealing Structure

(B) High-Temperature & High-Pressure Resistant Material System

(C) Double Eccentric + Conical Sealing Design

II. Key Technical Attributes

Product Overview

III. Precision Manufacturing Processes and Quality Control

(A) Manufacturing Process Analysis

(B) Quality Assurance System

Valve Details

V. TIANYU Brand Customization Advantages

Application

IV. Product Application Scenarios

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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