Check Valves Manufacturer

Check Valve

China Check Valves Manufacturer

Tianyu Check Valve Manufacturers is among the top-tier check valve manufacturers and supplier in China.
Valve Types: Swing Check Valve, API 6D Full Open Swing Check Valve, Lifting Check Valve, Dual Plate Check Valve, Axial Flow Check Valve, Titling Check Valve, Single Plate Wafer Check Valve
Design Standards: BS1868, API 594, API 602, ASME B16.34, API 6D
Size Range: 1/2 – 64 Inch
Pressure Range: Class 150-2500 LB
End Connections: Flanged (FF, RF, RTJ), Socket Weld (SW), Threaded (NPT, BSP), Butt Weld (BW), Wafer, Lug
Material Types: Carbon Steel, Stainless Steel, Duplex Steel, Al-BRZ, Alloy
Disc Types: single plate, dual plate, tilting disc
Bonnet Types: Bolted Bonnet, Pressure Bonnet, Welded Bonnet

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CHECK VALVES
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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Check Valve Manufacturer

TianYu Top Check Valve Manufacturer

Tianyu check valve manufacturers are committed to producing high-quality check valve products. Its check valve has excellent anti-backflow function, widely used in a variety of fluid pipeline systems. Tianyu focus on technical innovation and quality control to ensure the stability and reliability of the check valve. The company has always been customer-centric, providing customized fluid control solutions, has won wide acclaim in the market.

APPLICATION OF CHECK VALVES FOR INDUSTRIAL FLOW SAFETY

I. Product Features: Perfect Fusion of Innovative Design and Reliable Performance

TIANYU Check Valves leverage hydrodynamic optimization to achieve automatic backflow prevention through precision-engineered structures:
(A) Structural Types and Technical Advantages
  1. Swing Check Valves
    • Single/Double Disc Design: Single-disc for DN50-DN600 (Cv=0.8); double-disc (DN800+) reduces closing time by 30% and water hammer by 50%.
    • Elastomeric Sealing: PTFE seat inserts (-196℃ to 200℃) combined with Stellite®6 hardfacing (HRC58-62) achieve API 598 Class IV sealing (≤0.1cc/min leakage).
  2. Lift Check Valves
    • Spring-Assisted Operation: Stainless steel springs (180GPa modulus) ensure sealing at 0.05MPa, ideal for pump discharges and vacuum systems.
    • Streamlined Disc: CFD-optimized flow path reduces resistance by 15% compared to conventional designs, saving energy costs.
  3. Dual Plate Check Valves
    • Hinge-Free Design: Two plates 联动 via central spring prevent jamming from particles, suitable for slurries (e.g., mining, pulp).
    • Compact Length: Only 1/3 the length of swing valves, saving installation space and support costs.
(B) Material and Sealing Solutions
Application Scenario Body Material Sealing Surface Treatment Typical Operating Conditions
Offshore Engineering Duplex 2205/Super Duplex HVOF Tungsten Carbide Seawater (Cl⁻ ≤35,000ppm)
Chemical Corrosion Hastelloy C-276/Titanium Full Nickel-Based Overlay Strong acids/bases (e.g., H₂SO₄)
High-Temp Steam Chrome-Moly F91 Steel Stellite®6 Overlay Power plant steam (540℃, 25MPa)
Food & Pharmaceutical 316L SS Electropolished EPDM Rubber Seal Aseptic media (FDA-compliant)

II. Manufacturing Process: Perfect Integration of Precision Control and Innovative Technology

TIANYU ensures every valve meets international standards through full-process quality control:
(A) Key Manufacturing Processes
  1. Precision Casting/Forging
    • Investment casting achieves ±0.1mm dimensional accuracy and Ra≤3.2μm internal finish;
    • Forged valves (Class 900+) exhibit 20% higher density and 50% longer fatigue life.
  2. Sealing Surface Treatment
    • 5-axis grinding ensures seat flatness ≤0.002mm;
    • Plasma-welded Stellite®6 layers offer ≥450MPa bond strength with ±0.05mm thickness control.
  3. NDT and Pressure Testing
    • 100% ultrasonic testing (UT) with Φ2mm sensitivity;
    • Helium mass spectrometry leak detection (≤1×10⁻⁹Pa·m³/s) and hydrostatic testing (1.5x rating, 30-minute hold).

III. Product Applications: Trusted Solutions for Global Industries

TIANYU Check Valves are widely used in:
(A) Oil & Gas Industry
  • Wellhead Equipment: Sulfide-resistant dual plate valves (NACE MR0175) operate reliably for 10+ years in H₂S-containing pipelines;
  • LNG Terminals: Cryogenic lift valves (-196℃) for BOG recovery systems meet ISO 28300 standards.
(B) Chemical & Petrochemical
  • Polyester Plants: Spring-loaded valves ensure zero leakage in ethylene glycol lines (2.5MPa, 180℃), reducing maintenance costs by 40%;
  • Chlor-Alkali Industry: Titanium swing valves resist wet chlorine corrosion for 8+ years, outperforming stainless steel alternatives.
(C) Power & Energy
  • Nuclear Power Plants: Welded check valves (ASME BPVC Section III) for main feedwater systems withstand ≥100,000 cycles;
  • Wind Turbines: Miniature valves (DN15-DN50) control hydraulic systems with ≤0.1s response time for pitch safety.
(D) Municipal & Environmental
  • Wastewater Treatment: Large-diameter double-disc valves (DN1200-DN2400) reduce water hammer by 60% in pump stations;
  • Drinking Water Systems: 316L SS valves meet NSF 61 for potable water safety.

IV. Competitive Advantages: TIANYU’s Core Strengths

  1. Rapid Response and Low Energy Consumption
    • Spring-assisted valves close ≤0.2s, preventing water hammer;
    • Optimized flow paths save $150,000 annually in electricity costs for a refinery.
  2. Global Certifications and Customization
    • 20+ international certifications (API 6D, CE-PED, GOST-R) ensure global market access;
    • Special designs (fire-safe, cryogenic) and OEM/ODM services available.
  3. Smart Monitoring and Lifecycle Support
    • Optional vibration sensors and wireless modules enable real-time condition monitoring;
    • Global service network covers five continents with 72-hour onsite response.
  4. Sustainability Commitment
    • 95% recyclable materials and valve refurbishment reduce customer costs by 50%;
    • Low-carbon manufacturing cuts carbon footprint by 25% compared to industry peers.

V. TIANYU Brand: Reliable Partner for Global Industrial Clients

Established in 1998, TIANYU specializes in industrial valves for 25 years, exporting to 65 countries and serving Fortune 500 companies like Shell and ExxonMobil. With ISO 9001, API Q1 certifications and 100,000-unit annual capacity, TIANYU delivers dependable flow control solutions worldwide.

Related News

Professional China Valve Manufacturers and Supplier

MOST QUALITY CHECK VALVES FOR YOU

The check valve is basically a one-way valve and is also called a non-return valve, it is generally used in pipelines to prevent backflow.
The flow can run freely in one way and in another way the check valve will be closed to protect the piping system from the water hammer. But at the same time, it will also cause pressure loss so in piping design the risk of the water hammer and pressure loss shall be evaluated to select the right valve type.
If you need any support about our Check Valves, pls contact us!

Check Valve 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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