Check Valves Manufacturer

Dual-Plate Check Valves

China Dual Plate Check Valves Manufacturer

TianYu Crafts Dual Plate Check Valves following API and other standards, offering customization, and exports to over 60 countries, ensuring top – notch quality and global service

Valve Types: Dual Plate Check Valve, Single Plate Wafer Check Valve, Thin Type WAFER Check Valve, Lifting Wafer Check Valve
Seat Type: Soft Seat, Metal Seat
Design Standards: API 594, API 6D
Size Range: 2-64 Inch
Pressure Range: Class 150-2500 LB
End Connections: Wafer, Lug, Flanged (FF, RF, RTJ), Butt Weld (BW), HUB
Material Types: Carbon Steel, Stainless Steel, Duplex Steel, Al-BRZ, Alloy, Ti

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Dual-Plate Check Valves
DN100 PN16 Lug Type Double Disc Swing Check Valve

DN100 PN16 Lug Type Double Disc Swing Check Valves

TIANYU DN100 PN16 lug check valve: double disc, swing type, DN50~DN1500, PN16~PN420. Handles -196~540℃, media like water, steam, oil. Ideal for power, petrochemical, metallurgy. Easy installation, low maintenance, reliable non-return. Customizable materials for specific needs.
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Diaphragm Non-return Spring Dual Plate Wafer Check Valve

ANSI DN150 PN16 Diaphragm Cast Iron Non-return Spring Dual Plate Wafer Check Valve

TIANYU diaphragm-type ductile iron spring double-disc wafer check valves leverage ductile iron and dual-disc spring design, covering DN40-DN800 with PN10-PN16 ratings. Precision casting and rigorous QC deliver efficient backflow prevention for municipal, building, and industrial sectors. Their low flow resistance, long life, and easy maintenance make them preferred industrial pipeline solutions.
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Double Disc Stainless Steel Wafer Type Spring Check Valve

DN150 PN16 DIN Double Disc Stainless Steel Wafer Type Spring Check Valve

TIANYU wafer-type double-disc stainless steel spring check valves prioritize international standard compliance and durability, covering DN50-DN1000 with PN10-PN16 ratings. Precision casting and rigorous QC deliver reliable backflow prevention for municipal, petrochemical, and food sectors. Their water hammer protection, lightweight structure, and long life make them preferred choices for industrial pipeline systems
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Dual Plate Check Valves

Dual Plate Check Valves Efficient

The Dual Plate Check Valve prevents backflow via two spring-loaded plates that open/close with flow direction. Compact and lightweight, Dual Plate Check Valves reduces pressure drop and responds quickly to flow changes. Ideal for water treatment, oil/gas, and chemical sectors, its durable materials ensure long life and low maintenance.

Dual Plate Check Valves: Compact and Efficient Backflow Solutions

I. Product Features: Innovative Hinge-Free Design Meets Intelligent Sealing

TIANYU Dual Plate Check Valves feature a patented hinge-free, spring-loaded dual plate design for synchronous opening/closing, engineered for particle-laden media, extreme temperature variations, and space-constrained applications:
(A) Structural Design & Flow Control Technology
  1. Hinge-Free Dual Plate Mechanism
    • Spring-Loaded Synchronization: Two discs driven by Inconel 718 springs (35N/mm) eliminate jamming risks, handling ≤500μm particles (e.g., mine tailings, paper stock), reducing blockages by 90% in a gold mine project.
    • Ultra-Compact Form: 40% shorter than swing valves (e.g., DN300 ≤350mm), saving space in offshore platforms and tank farms, reducing support loads by 30%.
  2. Multi-Level Sealing System
    • Metal Hard Sealing: Stellite®6 overlay (HRC58-62) via laser cladding (1.5-2mm depth) achieves API 598 Class IV sealing (≤0.1cc/min) at 20MPa; PTFE soft seals (≤200℃) meet bubble-tight Class VI.
    • Self-Cleaning Flow Path: 3° inclined sealing surfaces flush debris at ≥1.5m/s flow, cutting maintenance frequency by 50%.
(B) Material & Application Matrix
Material Grade Typical Grade Tensile Strength(MPa) Temp Range Key Applications
Carbon Steel A105/A105N ≥485 -29℃~427℃ Oil refining, power plant CW systems
Stainless Steel F316/F316L ≥515 -196℃~200℃ Seawater desalination, food-grade syrup
Duplex Steel 2205/2507 ≥750 -50℃~300℃ High-chloride environments
High-Temp Alloy F91/Hastelloy C276 ≥620 -40℃~650℃ Supercritical steam, aggressive chemicals

II. Manufacturing Processes: Intelligent Forging & Full-Quality Control

TIANYU leverages Industry 4.0 production for end-to-end digital management:
(A) Key Manufacturing Steps
  1. Die Forging Technology
    • 2000-ton automated presses with 5:1 forging ratio refine grains to ASTM No.11+, boosting fatigue resistance by 60% for Class 2500 applications.
    • 3D CT scanning (0.1mm resolution) and UT testing ensure defect-free bodies/discs.
  2. Precision Machining
    • 5-axis CNC achieves ≤0.002mm flatness on seats and ±0.01mm spring slot positioning, enabling ≤0.2s response at 0.05MPa.
    • Vacuum heat treatment for stainless steel discs enhances corrosion resistance by 40%.
  3. Surface Treatments
    • Wear Resistance: HVOF tungsten carbide coating (150μm, HV1200) on mining valves withstands 25m/s erosion, tripling service life.
    • Corrosion Resistance: Zn-Ni alloy (20μm) + epoxy (80μm) for marine valves passes 1500-hour salt spray tests.
(B) Full-Dimension Testing
  • Hydrostatic Test: 1.5x pressure (e.g., 13.5MPa for Class 900), 45-minute hold with ≤0.5% drop.
  • Gas Seal Test: 1.1x pressure with helium, leakage ≤5×10⁻¹⁰Pa·m³/s (better than API 6D Class VI).
  • Fatigue Test: 100,000 cycles with ±20% pressure 波动，98% sealing retention.

III. Product Applications: Backflow Experts for Diverse Industries

TIANYU valves excel in challenging environments:
(A) Oil & Gas
  • Shale Gas: Sulfur-resistant models (NACE MR0175) last 7+ years in 800ppm H₂S, doubling industry lifespan.
  • LNG Terminals: Cryogenic F316L valves (API 6A PR2) respond ≤0.1s at -162℃ for loading arm safety.
(B) Chemical & Petrochemical
  • Polyester Plants: Duplex 2205 valves run 8 years in 5% particle-laden ethylene glycol, extending maintenance cycles from 6 months to 2 years.
  • Chlor-Alkali: Titanium TA2 discs resist 150,000ppm Cl⁻ for 10+ years, 5x longer than standard SS.
(C) Municipal & Environmental
  • Wastewater Pumps: DN1000 valves with dampers reduce water hammer by 60%, protecting pipeline foundations.
  • Rainwater Recovery: NSF 61-certified 316L valves handle 300μm solids with 15% lower pressure drop, improving pump efficiency.
(D) Energy & Power
  • Supercritical Power: F91 valves pass 100,000 cycles at 540℃/25MPa, sealing wear ≤0.05mm (ASME BPVC Section III).
  • PV Silicon: DN25 micro valves control 99.99% pure trichlorosilane with ≤1×10⁻⁹Pa·m³/s leakage.

IV. Advantages: TIANYU’s Global Competitiveness

  1. Hinge-Free Core Benefits
    • Anti-Jamming: 90% fewer unplanned shutdowns in particle-laden media.
    • Low Flow Resistance: 20% higher Cv value, saving 12% annual pumping energy for DN300 lines.
  2. Customization Capabilities
    • Special Designs: Fire-safe (API 607), anti-static (ISO 10497), and anti-frost solutions for arctic/desert conditions.
    • Smart Monitoring: Optional ±0.5% accuracy position sensors for IIoT integration, 95% fault prediction rate.
  3. Global Certifications & Support
    • Compliance: 25+ certifications including API 6D, CE-PED, GOST-R for global markets.
    • Rapid Service: 7 regional centers with 24/7 support, 48-hour emergency parts delivery, cutting downtime by 75%.
  4. Lifecycle Value
    • Longevity: ≥12-year service life, 70% cost savings via on-site disc replacement (30-minute turnaround).
    • Sustainability: 98% recyclable components, 40% lower forging energy, 150kg CO₂e reduction per DN800 valve (EU CE PED compliant).

V. TIANYU Brand: Your Global Partner in Industrial Valves

With 15 years of forging expertise,200 Sets of Equipment and 60,000 units/year capacity (DN15-DN1600), TIANYU serves Shell, ExxonMobil, and 70+ countries. ISO 9001:2015 and API 6D 609 certified, we ensure full traceability via blockchain, delivering reliable solutions for projects like Saudi NEOM and Qatar World Cup energy systems.

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BUTTERFLY VALVE SUPPLIER

MOST QUALITY DUAL PLATE CHECK VALVES FOR YOU

TIANYU Dual Plate Check Valves combine hinge-free anti-jamming design with forged steel durability, offering robust backflow prevention for the world’s toughest industrial challenges. From sulfurous gas fields to high-purity semiconductor pipelines, we empower clients with safety, efficiency, and sustainability—backed by global expertise and uncompromising quality.
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Dual-Plate Check Valves Parts

Sealing Element

The sealing element is vital for valves, preventing media leakage when closed. Made of durable, corrosion-resistant materials, it withstands pressure, temperature, and corrosion. Its repeated friction during operation makes material choice and manufacturing quality crucial for sealing performance and valve lifespan, regardless of valve type.

Valve Stem

The valve stem links the closure element to the operating mechanism, controlling its movement to regulate media flow. It requires strength and rigidity to withstand forces while maintaining stability. Its design and quality directly impact the valve’s flexibility and durability.

Valve Body

The valve body serves as the core structure of the valve, forming the main framework that provides installation and support for other components. It houses the internal channels for media flow. Whether it’s a ball valve, butterfly valve, or gate valve, the valve body is the most essential part, directly influencing the valve’s performance, flow characteristics, and service life.

Valve Cover

The valve cover is the enclosed part of the valve, typically connected to the valve body to form a sealed space within the valve. Its main function is to protect the internal components of the valve from external impurities and ensure complete sealing when the valve is closed, preventing media leakage. The design and manufacturing quality of the valve cover significantly impact the overall performance of the valve.

Why Choose Us

Ensure Safety

Our products and services comply with international standards and specifications to make sure that we only produce the best and highest quality products and services to our clients.

Customization Service

We offer tailor-made industrial valves to ensure that our product fits your application standards and demand. TIANYU is ISO, API, MSS, and ASME compliant to guarantee you the highest product quality.

Fast Shipping

As a business partner, TIANYU makes sure that we commit to our clients’ requested deadline because we very much understand the importance of adhering to the timeline required.

After-Sales Service

TIANYU’s service does not end once our industrial ball valves are being delivered. Also, we offer warranties and provide customer service to our clients as part of our quality service.

About Us
valve test apparatus

Founded in 2009, Wenzhou Tianyu Valve Technology Co., Ltd. is a professional valve enterprise integrating design, development, production, and sales services, located in the hometown of Chinese valves – Oubei Town, Wenzhou.

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