profession valve manufactrue and supplier

Concentric Line Butterfly Valves

China Concentric Line Butterfly Valve Manufacturer

Concentric Line Resilient Butterfly Valves have stem/disc/seat centerlines coinciding, achieving bidirectional sealing via elastic materials (e.g., rubber). Features: compact, low flow resistance, easy operation. Applied in low-pressure/clean media systems like water, food/pharmacy, HVAC.

Core Advantages:
  • Soft sealing (EPDM/NBR/FKM): ISO 5208 Class A leakage rating.
  • Concentric design: simple structure, low cost, 1/3 installation space of gate valves.
  • Bidirectional sealing (≤PN25): no flow direction requirement.
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Professional Centerline butterfly valve

Centerline butterfly valves feature simple structures, easy manufacturing and small installation spaces. For critical applications, consult Tianyu Valves—we customize materials, seals and certifications per project needs.

  • API 609: Specification for butterfly valves (soft/hard seal).
  • ASME B16.34: Valve design for pressure, temperature, and end connections.
  • ISO 5208: Performance testing for leakage and operation.
  • EN 593: European standard for industrial butterfly valves.
  • API 607 (Optional): Fire-safe certification for soft-sealed valves.

Professional manufacturer of Concentric Line Resilient Butterfly Valves

Center Line Butterfly Valve feature a concentric design where the stem, disc, and seat centerlines align, relying on elastic materials like EPDM, NBR, or FKM for bi-directional sealing, achieving ISO 5208 bubble-tight leakage standards. Key advantages include:
  • Compact Structure: Occupying only 1/3 the space of gate valves of the same diameter, supporting wafer, flanged, and other installation types for space efficiency;
  • Low Flow Resistance: With a flow coefficient (Cv) ≥ 0.8DN and pressure drop ≤ 0.1bar when fully open, ideal for large-diameter water systems and HVAC circuits;
  • Safety Compliance: Meeting standards like API 609 and EN 593, with sanitary models certified by FDA/3A and potable water models approved by WRAS/NSF 61.
As a professional manufacturer, Tianyu Valves offers end-to-end customization:
  • Material Optimization: Valve bodies in ductile iron, 316 stainless steel, or rubber-lined options; stems in corrosion-resistant 316L/titanium alloy; seals tailored for media (e.g., PTFE for dilute acids);
  • Actuation Solutions: Manual, electric (IP67-protected), and pneumatic (ATEX-certified explosion-proof) actuators with response times ≤ 10 seconds;
  • Testing & Certification: 1.5x hydrostatic testing, 10,000-cycle life tests, and certifications including API 609/CE/PED, supporting customization for nuclear power, LNG, and other high-demand scenarios.
Widely used in water engineering, food sterile production lines, and chemical anti-corrosion pipelines, these valves excel in controlling clean media with nominal pressures PN10-PN25 and temperatures -20°C~200°C, delivering cost-effective and reliable sealing solutions for industrial fluid management.

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Concentric Line Butterfly Valves Parts

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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