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.

Size Range: 2″ – 60″ (DN50 – DN1500)
Pressure Range: Class 150-300 | API 609 600 PSI
Design Standards: API 609, ISO 10631, BS 5155, MSS SP-67
Material Range: Ductile Iron, Cast Steel, Stainless Steel (304/316), Bronze
End Connections: Flanged (FF, RF), Wafer, Lug, Butt Weld (BW)
Body Structures: Wafer Type, Lug Type, Double Flanged
Body Types: Concentric, Resilient Seated
Body & Bonnet Connection: Bolted Bonnet, Integral Stem (Anti-blowout)

API 609 ASME B16.34 CE Certified DN80 PN16 WCB Carbon Steel Body SS304 Disc EPDM Soft Seal Flange Center-Line Butterfly Valve

TIANYU’s DN80 PN16 center-line butterfly valve delivers cost-effective, reliable flow control for water, HVAC, and light industrial applications. Its WCB body, SS304 disc, and EPDM soft seal balance strength, corrosion resistance, and tight sealing (Class IV). Customize it to your needs: opt for Viton seats (150℃ service), a lockable lever (security), or SS316 disc (enhanced corrosion). For larger systems, upgrade to a worm gear operator (reduced torque). Tailored to your media and operational requirements, it combines simplicity, durability, and compliance—your go-to butterfly valve solution.

API 609 ASME CE DN200 PN10 GGG40 Ductile Iron 2507 Duplex Steel PTFE Full-Lined Wafer Type Concentric Line Soft Seal Butterfly Valve

TIANYU’s PTFE-lined concentric line butterfly valve delivers cost-effective, leak-tight control for corrosive media. Customize it to your operational needs: opt for PFA lining (up to 200℃) for heated fluids, 2205 duplex steel for extreme saline service, or PN25 pressure rating for higher-pressure systems. Add pneumatic/electric actuators for automated control, or FDA-compliant lining for food/pharmaceutical use. These tweaks enhance compatibility with your specific media, pressure, and workflow—boosting reliability, reducing long-term costs, and ensuring seamless integration into your process.

API 609 ASME CE DN150 PN10 GGG40 Ductile Iron 2507 Duplex Steel PTFE Full-Lined Wafer Type Midline Soft Seal Butterfly Valve

TIANYU’s PTFE-lined midline butterfly valve delivers cost-effective, leak-tight control for corrosive media. Customize it to your needs: opt for PFA lining (higher temperature tolerance, up to 200℃) for heated fluids, 2205 duplex steel for extreme saline service, or PN25 pressure rating for higher-pressure systems. Add pneumatic/electric actuators for automated control, or FDA-compliant lining for food/pharmaceutical use. These tweaks enhance compatibility with your specific media, pressure, and operational requirements—boosting reliability and reducing long-term costs.

DN175 PN10 Aluminum Bronze Disc with Rubber Lining, Soft-Seal DI Lug-Type Flanged Midline Butterfly Valve

TIANYU DI lug-type midline butterfly valve delivers cost-effective, leak-tight flow control for water, sewage, and industrial fluid systems. Its aluminum bronze disc, rubber soft seal, and DI body ensure corrosion resistance, durability, and Class VI sealing.Customize with 316 stainless steel disc for extreme corrosion, Viton lining for high-temperature oil resistance, or electric/pneumatic actuation for automation. Opt for larger sizes (DN50-DN300), higher pressure ratings (PN16), or WRAS/NSF 61 certification for potable water. Tailor to your media, temperature, and installation needs for optimal performance.

DN125 PN16 CF8M Stainless Steel Lug-Type Butterfly Valve with PTFE Lining Concentric Line Butterfly Valves

TIANYU DN125 PN16 CF8M lug-type butterfly valve with PTFE lining delivers corrosion resistance, bubble-tight sealing, and versatile installation for chemical, pharmaceutical, and industrial applications. It combines CF8M stainless steel, PTFE lining, and midline design for reliability and efficiency, backed by API/ASME standards.Customize with 316L/2205 duplex steel for extreme corrosion, extended temperature (-40℃~200℃) with modified PTFE, electric/pneumatic actuators, or sanitary polished finishes. Tailor to your media, pressure, and hygiene requirements for optimal performance.

Pn16 Dn150 Wcb Single Double Flange Motorized Soft Sealing Electric Actuator Butterfly Valve

Pn16 Dn150 Wcb Single Double Flange Motorized Soft Sealing Electric Actuator Butterfly Valve TIANYU PN16 WCB cast steel gate valve, with DN15-DN600 sizes, single/double flanges, and -29℃~425℃ temp range, suits water, oil, gas. Its wedge design ensures tight sealing, WCB material offers durability. Ideal for municipal, petrochemical, power sectors. Customizable (drives, seals, sizes) to meet specific needs, backed by strict quality testing.

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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Excelling in Harsh Conditions, Leading the Industry with High-Performance Valves for Stable Operation

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.

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.