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)

DN100~DN800 PN16 Cast Iron/Stainless Steel PTFE Seal Electric Flange Butterfly Valve

TIANYU DN100~DN800 PN16 electric butterfly valve: PTFE seal, cast iron/stainless steel, ≤200℃. Flange connection, precise electric actuation. Leak-tight, durable, easy maintenance. Ideal for water, petrochemical, power. Customizable: material, actuator type for unique needs.

DN50~DN600 PN16 GGG40 Pneumatic Wafer PTFE Lined Butterfly Valve

TIANYU DN50~DN600 pneumatic butterfly valve: GGG40 with PTFE lining, one-piece disc-shaft, 10~16bar, -20~180℃. Corrosion-resistant, bubble-tight, easy maintenance. Ideal for chemicals, refining, water treatment. Customizable: actuator type, seal material for unique media.

API 6D Electric Soft-Seated PTFE/Fluorine Lined Butterfly Valve for Oil & Gas and Chemical Corrosion Resistance

API 6D PTFE Lined Butterfly Valve DN50–DN400 ductile iron valve for corrosive fluids. Double-eccentric design enables frictionless operation and zero leakage Full 3–5mm moulded PTFE lining bonded to sodium-etched metal delivers unmatched corrosion resistance

Stainless Steel Corrosion-Resistant Pneumatic Wafer Type Fluorine Lined Butterfly Valve

TIANYU fluorine lined wafer type pneumatic butterfly valve constructs a professional solution for strong corrosion media control with its full fluorine lining anti-corrosion system, wafer type compact structure, and pneumatic drive advantages. Fluorine Lined Wafer Type Pneumatic Butterfly Valve

High Performance API609 Manual EPDM Seat 304 Stainless Steel Lug Type Cast Iron Concentric butterfly Valve

High-performance API609 Lug type Manual Butterfly Valve constructs a standardized solution for industrial fluid control through its concentric flow efficiency, lug connection reliability, and zero-leakage soft sealing. From municipal utilities to industrial manufacturing, its material diversity, operational adaptability, and customization flexibility continuously create value for customers

Soft Sealing Cast Iron Gear Operated Concentric Double Flanged Butterfly Valve

The TIANYU double flanged gear operated concentric butterfly valve constructs a universal solution for industrial fluid control with its efficient flow path of concentric structure, reliable pressure bearing of double flanged connection, zero-leakage guarantee of soft sealing technology, and precise control of gear drive.

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.