High Quality Double Flange Butterfly Valve

Double Flanged Butterfly Valve Manufacturers

Carbon Steel Flange Butterfly Valve - Lever

10bar~20bar (1.0mpa~2.0mpa)

Product Advantages

icon Specialized standards for specialized supply: Strict standards separation ensures dimensional compatibility, eliminating misalignment risks.

icon Full-process Reliability: Reinforced components exceed standard product performance in strength/sealing/operation.

icon Sealing Integrity: Precision machining under single-standard protocols prevents leakage from mismatched sealing surfaces.

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

icon Traceable Craftsmanship: ISO9001 casting with permanent markings enables lifetime quality tracking.

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	10bar~20bar (1.0mpa~2.0mpa)
Testing Pressure	256psi
Medium	Water/Oil/Air
Medium Temperature	-25℃~180℃

Material of the Valve

Body	WCB/ WCC/LCB/ LCC/ LC1
Disc	DI/ CF8/ CF8M/ CF3/ CF3M/ 2205/ 2507/ 1.4529/ HC276/ C95400/ C95800
Stem	45#/ SS410/ SS416/ SS420/ SS304/ SS316/ SS316L/ 17-4/ 2205/ 2507/ 1.4529/ K500/ CF8/ CF8M/ HC276
Soft Seat	EPDM/ NBR/ SIL/ FKM/ FPM/ VITON/ PTFE/ HYPALON/ UHMWPE
Coating	Epoxy Resin 200um -250um

THE SOURCE MANUFACTURER

By controlling the entire process from raw WCB casting to final epoxy coating and assembly, we deliver carbon steel valves with superior structural integrity, corrosion resistance, and performance that commodity suppliers cannot match.

FOUNDRY-LEVEL MATERIAL CONTROL

We guarantee material integrity by performing PMI testing on raw materials, ensuring every carbon steel valve body strictly adheres to ASTM/EN standards for optimal performance and longevity.

PRECISION CNC MACHINING

Our advanced CNC centers ensure every component is machined to exact specifications. This precision is critical for a perfect fit, flawless operation, and guaranteed zero-leakage performance.

PROVEN RELIABILITY & DESIGN

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

Teflon Lined Butterfly Valve Manufacturers

Key Application Industries

The following are representative application industries for this valve. Since our carbon steel butterfly valves can be applied to almost all non-corrosive industrial sectors where temperature and pressure requirements are met, many industries are not listed individually.

Petrochemical Industry

WCB butterfly valve (flange type) ensure 100% welding compatibility with carbon steel pipelines, offering seamless integration for petrochemical applications without special processes.

Power Generation Industry

Double flanged butterfly valves are cost-effective, reducing auxiliary system construction costs and enabling rapid maintenance through their standardized design.

Municipal Water Supply Industry

Our carbon steel water butterfly valves (flange type) are recommended for neutral municipal main pipelines and budget-limited, short-term water supply projects.

Marine/Shipbuilding Industry

Our flange type marine butterfly valves are suitable for low-pressure (PN10-16) seawater cooling and ballast secondary systems,meeting classification society requirements.

Environmental Protection Industry

Our flange type PTFE lined butterfly valves operate stably in pH 6-9 media for years, ensuring leak-free performance in urban wastewater networks.

Food Processing Industry

Our sanitary butterfly valves (flange type), with food-grade SIL/EPDM/PTFE lining, operate safely in neutral pH 6-8 environments for food processing applications.

Metallurgical Industry

Our flange butterfly valve, featuring wear-resistant copper bearings, provide exceptional durability and high-pressure capability for demanding metallurgical processes.

Refrigeration Industry

Our epoxy-coated cryogenic butterfly valves (flange type) offer cost-effective, short-term operation from -30°C to 80°C for refrigeration and cold storage applications.

Seawater Desalination Industry

Marine-grade double flange valve resists chloride corrosion in PN16 desalination systems with 2205/2507 alloys.

Engineered for Demanding Environments

Our carbon steel valves are designed to excel where others fail. From abrasive media to extreme temperatures and high-vibration zones, we provide robust, certified solutions for the most challenging operational conditions.

Corrosive Environments

Our corrosion resistant butterfly valve simplement JRVAL’s triple anti-corrosion process (galvanized, epoxy, PTFE coated) ensuring a corrosion rate of ≤0.08mm/year. Coupled with full-encapsulated sealing technology, the media leakage rate is remarkably low, less than 0.01%.

Environments with Particulate or Abrasive Media

For abrasive particulate environments, our butterfly flange valves offer disc/ball options with carbon steel sprayed high-performance ceramic coatings (e.g., tungsten carbide, HRC70+) or full rubber lining, guaranteeing reliable bi-directional zero-leakage sealing (up to ANSI/FCI 70-2 Class VI) upon closure.

Vibrating or Impact-Prone Environments

Our carbon steel butterfly valves utilize high-quality carbon steel (like WCB, with 15% superior impact toughness than standard). The valve body design is optimized via FEA finite element analysis, ensuring structural stability under vibration frequencies of 0-50Hz and impact acceleration up to 5G.

Space-Constrained Environments

As a leading OEM butterfly valve manufacturer, we provide non-standard customization solutions tailored to specific client needs such as medium, temperature, and unique dimensions. This allows our valves to be perfectly integrated into space-constrained environments.

Cryogenic Environments

Our low temperature butterfly valves are rigorously selected and traceable, conforming to ASTM A352 LCB/LCC or A350 LF2 standards for cryogenic carbon steel. A Material Test Certificate (MTC) is provided for every batch, ensuring reliability in demanding cold applications.

Densely Routed Industrial Piping Environments

Utilizing advanced CNC machining technology, our CNC butterfly valves ensure precise dimensions and interchangeability of valve bodies and internal components. This reduces assembly difficulty and guarantees accurate, deviation-free installation even in narrow and dense piping layouts.

Water Supply Systems

Our butterfly valve double flange are robustly constructed with hot shell cast valve bodies for enhanced pressure capacity (PN10-PN20). Equipped with copper sleeve bearings for extended wear resistance, they ensure exceptional durability and minimal pressure drop for various water supply systems.

Semiconductor Ultra-Pure Water Systems

Our hand lever operated butterfly valve provide a 100% intuitive visual indication of the valve’s open/closed state directly from the handle’s position. This clear feedback significantly lowers the risk of misoperation in critical semiconductor ultrapure water systems.

HVAC Systems

Our HVAC butterfly valves, made from high-quality WCB material, fully meet PN16 pressure ratings, making them ideally suited for central air conditioning water systems operating within 0.6-1.0MPa. A prime example is stable operation in a hotel’s chilled water pipeline for 6 years.

Wastewater Systems

Our centerline butterfly valves, with hard alloy surfacing, offer 3x extended lifespan and enhanced wear resistance for abrasive sewage treatment applications.

Gas Systems

Our butterfly valve flange end, when equipped with specialized coatings, is capable of effectively handling corrosive gases such as H₂S and CO₂ prevalent in challenging gas systems.

Heating Systems

Our double flange type butterfly valve feature flange connections for easy installation and disassembly, making them ideal for large-diameter heating pipelines. Their robust structure provides strong resistance to water hammer, ensuring long-term operational stability.

CASE STUDY: XIANMEI FOODS

How a custom flange solution from JRVAL ended chronic leaks and prevented a costly plant-wide shutdown.

The Challenge

Mismatched Standards, Constant Leaks

Xianmei Foods was operating a processing plant with a mix of legacy DIN-standard pipes and newer ANSI-standard pipes. Off-the-shelf "universal" valves failed to create a secure seal between the mismatched flanges.

Escalating Consequences

The result was constant, costly leaks. This created an unsafe, messy work environment, led to significant product loss, and threatened a complete, expensive plant shutdown to address the systemic problem.

The JRVAL Solution & Result

Expert Consultation & Precision Fit

Instead of a one-size-fits-all approach, JRVAL engineers consulted with the client to understand the exact specifications of both their DIN and ANSI pipelines. We then manufactured and delivered butterfly valves with flanges machined precisely to fit each connection standard perfectly.

Immediate & Lasting Impact

The result was immediate and total. Upon installation of the JRVAL valves, all leaks stopped. The plant returned to safe, clean, and efficient operation, completely avoiding the feared shutdown and restoring production continuity.

"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. We provide the documentation to prove it.

Carbon Steel Flange Butterfly Valve - Lever

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Double Flanged Butterfly Valve Dimensions

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Frequently Asked Questions

The pipe flanges in our factory are a mix of national and German standards. Can your valves guarantee a perfect fit for both?

Absolutely. This is our specialty. Provide us with your flange standards list (e.g., GB, DIN, ANSI), and we will custom-machine the valve flanges for a guaranteed, leak-proof fit with both your national and German standard pipes.

Our valve handles are installed high up and often bend under the force of operation. Are your handles more durable?

Yes. Our handles are engineered with reinforced materials and an optimized structure to be significantly more robust. They are designed to withstand high operational forces without bending or failing.

What does "retaining the original casting surface appearance" mean? Is it a rough finish?

Not at all. It refers to a clean, shot-blasted finish that showcases the natural texture and high quality of the metal casting. It's smooth, with clear markings, reflecting our confidence in our manufacturing process.

We'll use these on a cooling water pipeline. Will the handles rust or seize in a high-humidity environment?

Our standard handles come with an anti-rust treatment. For high-humidity or corrosive environments, we offer upgrades like special coatings or full stainless steel handles to ensure long-term, rust-free performance.

Can you produce handle butterfly valves with Japanese standard JIS 10K flanges?

Yes, we can. We manufacture valves to meet a wide range of international standards, including JIS 10K, 20K, and others. We ensure full compatibility with your specific system requirements.

OUR SERVICE & GUARANTEE

Free Samples

Compare our quality against any brand. We're confident you'll choose JRVAL after an in-depth evaluation of our sample products.

2-30 Year Warranty

We stand by our craftsmanship. Enjoy a comprehensive warranty covering non-human damage, with spare parts readily available.

Verified Quality

Every shipment is backed by comprehensive documentation, including material test reports (MTR), heat treatment reports, and mechanical performance tests.