Stainless Steel Flanged Butterfly Valve - Lever

PN6~PN20 (Class125~150); 1.5in~8in

Product Advantages

icon Superior Material Composition: Our valves are cast with chemical compositions at the highest end of international standards. For example, our ASTM A351 CF8 stainless steel contains 9% Nickel—the maximum allowable—to ensure superior corrosion resistance and extended service life

icon Precision-Matched Flanges:Flanges customized from pipeline measurements for leak-free sealing.Thickness reinforced per standards (e.g., HG/T).

icon Future-Proof Automation Ready: ISO 5211 actuator pads enable future pneumatic/electric upgrades without valve replacement

Standards and Certifications

Design and Manufacture: ASME B16.34; ASME VIII; API 609

Leakage Class: API 598 (Bi-directional Zero Leakage)

Side Flange Standards: ANSI 125LB/ 150LB; ASME; AS-D/E; BS; DIN; EN PN6/ PN10/ PN16; GB; GOST; HG/T; JIS 5K/ 10K

Top Flange (Actuator Mounting) : ISO 5211; GB 90°

Face-to-Face Dimension: ISO 5752; MSS SP-68; ASME B16.10; EN 558-1; API 609

Testing Standards: API 598; EN 12266-1; ISO 5208; BS 6755-1

Certifications: ISO 9001; CE; BV; API 609; API 598; EAC; SIL3；

Technical description

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Q&A

Specification of the Valve

Type of Connection	Flange
Actuation	Lever
Size	1 1/2in ~ 8in (DN40~DN200)
Pressure	6bar~20bar (Class 125/150)
Testing Pressure	1.5 x Rated Pressure
Medium	Water, Oil, Gas, Steam, Corrosive Media, Slurry, etc.
Medium Temperature	-25℃~180℃ (Depends on seat material)

Material of the Valve

Body	Stainless Steel: CF8 (304), CF8M (316), CF3 (304L), CF3M (316L), JS1030, 1.4406 Duplex Stainless Steel: 2205, 2507 Austenitic Stainless Steel: 1.4529, CN7M (Alloy 20)
Disc	Cast Iron: DI, CI Stainless Steel: CF8 (304), CF8M (316), CF3 (304L), CF3M (316L), CD3MN (Duplex 2205), CE3MN (Super Duplex 2507), 1.4529 (926) Aluminum Bronze: C95400, C95800 Nickel Alloy: CW6MC (Hastelloy C-276 eq.)
Stem	Carbon Steel: 45# Stainless Steel: SS410, SS416, SS420; SS304, SS316, SS304L, SS316L; 17-4PH (SS630); Duplex 2205, Super Duplex 2507, 1.4529 Nickel Alloy: Monel K500, Hastelloy C-276
Soft Seat	Elastomers: EPDM, HTEPDM, NBR (Nitrile Rubber / Buna-N), SIL (VMQ), FKM (VITON™), HYPALON™ Plastics: PTFE, PFA, UHMWPE

High-Density Casting for Lug Butterfly Valve

High-Density Casting: Zero Porosity Guaranteed

Our butterfly valve stainless bodies are produced from a high-density casting process. This ensures a solid, non-porous structure, completely free from sand holes and other casting defects. The result is superior strength and maximum durability.

Learn More About Our Process

THE SOURCE MANUFACTURER

Our global reputation is built on deep material science expertise and state-of-the-art precision engineering. By controlling the entire process from raw casting to final assembly, we ensure every valve meets our uncompromising standards for quality and performance.

FOUNDRY-LEVEL MATERIAL CONTROL

Founded by casting experts, we guarantee material integrity from the source. Through PMI spectral testing, we verify alloy compositions, ensuring every butterfly valve casting strictly adheres to ASTM/EN standards for optimal performance and longevity in automated systems.

PRECISION CNC MACHINING

Our advanced CNC centers machine critical interfaces, like the ISO 5211 mounting pad, to exacting tolerances. This precision guarantees effortless, accurate alignment with any standard electric or pneumatic actuator, ensuring reliable automated control.

PROVEN RELIABILITY & DESIGN

With two decades of field validation across industries, our butterfly valve designs are not just theoretical; they are proven to be rational, durable, and reliable in the most demanding applications.

Wholesale Stainless Steel Butterfly Valve

Key Application Industries

Below are representative applications for this valve. As our butterfly valves can be used in nearly all industrial sectors where temperature and pressure requirements are met, many industries are not listed individually.

Petrochemical Industry

Our CF8M butterfly valve and other stainless steel butterfly valves utilize premium ASTM A351 CF8M/CF8 standard castings. These castings feature precise composition and are completely defect-free, enhancing corrosion resistance by over 300% compared to industry norms, ensuring long-term reliability in aggressive chemical environments.

Power Generation Industry

Our lever operated butterfly valves feature an optimized valve seat structure design, combined with unique vulcanization or embedded processes. This innovative approach achieves a 15% reduction in operating torque and ensures highly reliable, bi-directional zero-leakage sealing, rigorously meeting ANSI/FCI 70-2 Class VI standards for critical applications.

Municipal Water Supply Industry

Our flange end butterfly valve are engineered with optimized material ratios and precision surface treatment. This enables them to achieve an exceptional operational lifespan of over 80,000 open/close cycles under complex operating conditions, far exceeding the industry average. As a result, our wholesale stainless steel butterfly valves significantly reduce pipeline network maintenance frequency and overall costs for municipalities.

Marine/Shipbuilding Industry

Our super duplex stainless steel butterfly valves are specifically designed for superior corrosion resistance in harsh seawater environments. They boast an impressive service life of 25 years (compared to an industry average of 8 years), with a corrosion rate reduced by 70%, making them a leading choice for shipbuilders and marine suppliers.

Environmental Protection Industry

Our SS 316 butterfly valves exhibit an average annual corrosion rate of less than 0.02 millimeters in acidic and alkaline wastewater with pH values ranging from 2 to 12, showcasing exceptional durability in demanding waste treatment processes.

Food Processing Industry

Our stainless steel flanged butterfly valves feature high-precision flange processing, ensuring optimal connection sealing and meeting stringent hygiene standards.

Metallurgical Industry

Butterfly valve ss316L with Mo≥2.0% enhances chloride resistance, while duplex stainless steel options provide 50% better erosion resistance for slurry pipelines in mining operations.

Refrigeration Industry

Low-torque butterfly valve with locking handle reduces refrigeration energy consumption by 8%, featuring ISO5211 actuator interface for precise positioning and 0.001% leakage rate.

Seawater Desalination Industry

Hand lever butterfly valve in 2507 super duplex withstand high-salinity brine. Hot-shell casting enhances pressure capacity by 20%, certified to ISO 5208 and API 598.

Engineered for Demanding Environments

Our stainless steel valves are designed to excel where others fail. From aggressive chemicals to extreme temperatures, we provide robust, certified solutions for the most challenging operational conditions.

Corrosive Environments

As leading stainless steel butterfly valve manufacturer, we ensure every batch of butterfly valve SS316 undergoes strict material certification, with Mo content ≥2.5% (per ASTM A240).

Abrasive Particle Environments

Our epoxy coated butterfly valves feature HV800+ hardened discs, reducing wear by 50% with copper sleeve bearings (60-70% lifespan extension). OEM-ready for mining slurry systems.

Space-Constrained Installations

Butterfly valve lever operated with flat-profile handle (ISO 5211 compliant) saves 40% lateral clearance. Multi-position locking optional for tight HVAC ducts.

Cryogenic Applications

Stainless butterfly valve with EPDM seals (-30°C rated) and 17-4PH stem ensures leak-free performance in LNG pipelines. EN 12266-1 tested.

Flood Control Systems

Large diameter butterfly valve (DN600+) reduces manual torque by 30% via optimized disc geometry. API 598-certified for rapid closure (<15s) with portable actuators.

Semiconductor Ultra-Pure Water

As one of SS butterfly valves manufacturers, JRVAL offer Ra≤0.1μm mirror polish, 316L electropolished internals, and SIL3-certified designs to minimize TOC/ion leaching.

Gas Pipeline Systems

ATEX II 2G/D-compliant butterfly valve with lever uses 316L conductive stem + grounding kit to dissipate static. SIL3 for gas metering stations.

Wastewater Treatment

Butterfly double flange with GTAW-welded 2205 duplex body resists pitting in sewage. 50% rubber-EPDM seats (2-year warranty) prevent jamming.

HVAC Systems

Butterfly valve flange type achieves 8-15% lower ΔP via aerofoil disc (ASME B16.34). CE-certified for energy-efficient air handling units.

Xianmei Foods production facility with mixed piping standards

BRIDGING THE GAP: FROM LEAKS TO FLAWLESS INTEGRATION

THE CHALLENGE

Xianmei Foods was facing constant disruptions. Their plant used a mix of legacy DIN and modern ANSI standard pipes. The "universal" valves from their previous supplier failed to create a proper seal on either, leading to persistent leaks, an unsanitary production environment, and the constant threat of a costly, full-scale shutdown for repairs.

THE JRVAL SOLUTION

We didn't offer a one-size-fits-all fix. Our engineers analyzed their exact piping specifications and custom-machined a series of Stainless Steel Flanged Butterfly Valves. Each valve was precisely engineered to match either the DIN or ANSI flange it would connect to, guaranteeing a perfect, secure fit across their entire mixed-standard system.

THE RESULT

The moment the JRVAL valves were installed, all leaks stopped. The plant's hygiene and safety improved immediately. By providing a custom, precision-engineered solution instead of an inadequate "universal" one, we eliminated their product loss, a major contamination risk, and the looming cost of an emergency shutdown.

"Don't waste your time with 'universal' valves if you have mixed pipe standards. JRVAL delivered valves that fit our old DIN pipes and our new ones perfectly. The leaks stopped immediately. Highly recommend."

— Project Manager, Xianmei Foods, Henan

QUALITY & COMPLIANCE CERTIFIED

Our commitment to quality is verified by internationally recognized standards, providing the documentation and peace of mind you need for critical applications.

Stainless Steel Flanged Butterfly Valve - Lever

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Double Flanged Butterfly Valve Dimensions

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Technical Questions & Customization

My pipeline’s existing flange is GB standard, but it’s old and may not have standard dimensions. Can your flange match it precisely?

Absolutely. JRVAL’s core advantage lies in “Flange Measurement-Based Customization”. Simply provide precise on-site measurements (e.g., hole spacing, outer diameter, thickness, sealing face type), or let our engineers assist with measurement. We ensure the custom flange aligns perfectly with your pipeline.

We need thicker flanges than standard to enhance connection strength and lifespan. Is this feasible?

Yes. We tailor flange thickness based on chemical industry standards (HG), ASME, or your specific requirements. For stainless steel valves, this customization significantly improves structural stability and pressure resistance.

Can your ANSI B16.5 Class 150 flanges handle highly corrosive media?

Certainly. JRVAL stainless steel flanges comply with ASME, DIN, JIS, and other global standards. We select corrosion-resistant materials (e.g., SS316L, duplex steel) to meet both pressure ratings and corrosive media demands.

Why “retain the original casting surface”? Won’t unpolished surfaces affect hygiene standards?

Our valves use precision casting with naturally smooth surfaces, treated by acid pickling & passivation for cleanliness. For food/pharmaceutical applications, internal mirror polishing is optional. Externally retaining the casting surface demonstrates confidence in quality, avoiding defects masked by excessive polishing.

OUR SERVICE & OUR GUARANTEE

Precision Fit

We solve connection problems. Our "Flange Measurement-Based Customization" ensures a perfect fit for any standard—ANSI, DIN, JIS, GB, or even your old, non-standard pipelines.

Durability Guaranteed

We build valves to last. By using superior materials like SS316L or duplex steel and offering reinforced designs, we ensure exceptional resistance to corrosion, pressure, and wear.

Qualified Quality

We provide full transparency. Before delivery, we can supply material test reports, heat treatment reports, and mechanical performance tests to certify our product quality.

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