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Flange in Butterfly Valve icon
Double Flanged Short Pattern Butterfly Valve icon
Flange in Butterfly Valve
Double Flanged Short Pattern Butterfly Valve

Stainless Steel Flanged Butterfly Valve - Bare Stem

10bar~20bar (1.0mpa~2.0mpa)
Water Supply & Wastewater Treatment Energy & Semiconductors Petrochemical Industry Seawater Desalination Mining & Metals Shipbuilding Industry

Product Advantages

iconSpecialized standards for specialized supply: Strict Standards separation ensures dimensional compatibility, eliminating misalignment risks.

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

iconMaterial Assurance: 100% stainless steel with third-party certifications eliminates counterfeit risks.

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

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

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

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

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

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

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

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

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Technical description

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Q&A

Specification of the Valve

 
Type of Connection

Flange

Actuation

Round/Square Head

Size

1 1/2in ~ 48in

(DN40~DN1200)

Pressure

10bar~20bar

(1.0mpa~2.0mpa)

Testing Pressure

256psi

Medium

Water, Oil, Gas, Steam, Corrosive Media, Slurry, etc.

Medium Temperature -25℃~180℃

Material of the Valve

 
Body

CF8/ CF8M/ CF3/ CF3M/ 2205/ 2507/ 1.4529/ 1.4406

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

High-Density Casting for Lug Butterfly Valve

High-Density Casting: Zero Porosity Guaranteed

Our buttwefly 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

A HIGHER STANDARD FOR CORROSION-RESISTANT AUTOMATION

We specialize in stainless steel investment casting, ensuring superior material purity and integrity. Our automation-ready valves provide unmatched performance for industries where cleanliness and corrosion resistance are non-negotiable.

INVESTMENT CASTING & PMI VERIFICATION

We guarantee true-to-spec material (CF8/CF8M/Duplex) through rigorous PMI testing on all raw materials, ensuring every valve body offers maximum corrosion resistance and structural integrity.

PRECISION MACHINING FOR HYGIENIC SYSTEMS

Our CNC centers machine ISO 5211 top flanges and sealing surfaces to tight tolerances, essential for perfect actuator alignment, bubble-tight shutoff, and preventing contamination in sensitive processes.

PROVEN AUTOMATION IN HARSH MEDIA

Our bare stem stainless steel designs are field-proven in chemical, marine, and food-grade applications, integrating flawlessly with actuators for reliable, long-life performance where carbon steel cannot survive.

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Engineered for Critical Industries

Our bare stem stainless steel valves are the definitive choice for automation in industries demanding purity, corrosion resistance, and long-term reliability. Explore their role in these specialized fields.

Stainless steel flanged butterfly valve

Food & Beverage Processing

Ideal for automated CIP (Clean-in-Place) systems, product transfer, and utility lines. The hygienic design of our stainless steel flanged butterfly valve ensures no product contamination and withstands aggressive cleaning agents.

Butterfly valve flange type

Pharmaceutical & Biotech

Used in purified water (WFI) loops, fermentation, and chemical synthesis where preventing microbial growth and material leaching is critical. The high-purity finish of our butterfly valve flange type meets stringent industry standards.

Butterfly valve double flange

Chemical Manufacturing

A necessity for handling corrosive acids, alkalis, and solvents. The CF8M/316 stainless steel body and secure butterfly valve double flange design provide a safe, leak-free solution for automated chemical dosing and transfer.

Flange end butterfly valve

Marine & Offshore Platforms

Essential for seawater cooling, ballast systems, and fire mains where saltwater corrosion would destroy carbon steel. The robust flange end butterfly valve in Duplex or Super Duplex offers superior resistance to chloride-induced corrosion.

Double flange valve

Desalination Plants

Perfect for pre-treatment, brine, and permeate lines in reverse osmosis (RO) facilities. Our bare stem double flange valve is ready for automation and built from materials designed to withstand highly saline environments.

Wholesale flange butterfly valve

Water Purification & Treatment

Used in ozone and UV disinfection systems where standard materials degrade. As a leading supplier, our wholesale flange butterfly valve with the correct seat material ensures longevity and reliable automated control in municipal plants.

Butterfly double flange

LNG Processing & Storage

For cryogenic utility applications, our stainless steel valves maintain ductility and strength at extremely low temperatures. The secure butterfly double flange connection is critical for safety in these volatile environments.

Butterfly valve flange supplier

Cosmetics & Personal Care

In the production of lotions, creams, and perfumes, non-reactive surfaces are vital. As a specialized butterfly valve flange supplier, we provide valves that ensure product purity and are easily integrated into automated batching systems.

China flange butterfly valve

Pulp & Paper (Bleaching)

Specifically for bleaching circuits using chlorine dioxide and other corrosive chemicals. The superior material of a china flange butterfly valve made from 2507 or 1.4529 steel is essential for resisting aggressive chemical attack.

PERFORMANCE UNDER THE MOST DEMANDING CONDITIONS

Our bare stem stainless steel valves are engineered for automation in environments where failure is not an option, providing process integrity and operator safety.

Hygienic & Sanitary Service

Designed with polished surfaces and minimal crevices to meet 3-A and FDA standards. The automation-ready design of our center line butterfly valve is perfect for automated cleaning cycles (CIP/SIP) in food and pharma industries.

Highly Corrosive Atmospheres

Ideal for coastal installations, chemical plants, and washdown areas. The inherent corrosion resistance of the stainless steel body protects the actuator mounting pad and ensures the butterfly valve flange connection remains secure and operable for years.

Cryogenic Service (-196°C)

Constructed with CF8/CF8M austenitic stainless steel, which retains excellent impact strength at low temperatures. This makes our low temperature butterfly valve ideal for automated handling of liquid nitrogen, LNG, and other cryogens.

High Temperature Service

Paired with a suitable seat, our stainless steel valves maintain structural integrity at elevated temperatures, preventing warping and ensuring reliable automation. This makes our high temp butterfly valve perfect for hot chemical, steam, and thermal fluid applications.

High Purity Water Systems

For Deionized (DI), RO, or Water for Injection (WFI) systems, our valves prevent metallic ion leaching, preserving water quality. The secure flange in butterfly valve design ensures system purity is maintained at all connection points.

Oxidizing Media Service

Handles oxidizing agents like nitric acid, peroxides, and chlorine solutions that are highly corrosive to other metals. The passive chromium oxide layer of our double flanged short pattern butterfly valve provides excellent protection.

Solutions for Specific Corrosive Media

The true strength of our stainless steel valves lies in their adaptability. By pairing the SS body with specialized internal components, we create automation-ready solutions for the most aggressive media.

Seawater & Brine Service

For marine applications, pairing a Duplex or Super Duplex disc with the stainless steel body provides superior resistance to chloride pitting and crevice corrosion. A true awwa butterfly valve designed for coastal and desalination plant automation.

Acids, Alkalis & Solvents

For broad chemical resistance, a PTFE seat and encapsulated disc provide an inert barrier against aggressive media. We are one of the leading teflon lined butterfly valve manufacturers providing automation-ready solutions for chemical plants.

Food-Grade & Dairy Products

For hygienic applications, an FDA-compliant white or blue EPDM seat ensures product purity and safety. The smooth finish of our epdm seat butterfly valve prevents bacterial buildup and is ideal for automated food processing lines.

Abrasive Chemical Slurries

For media like lime slurry or titanium dioxide, a disc with a thick, bonded nylon coating provides exceptional resistance to both chemical attack and particle abrasion. We specialize in these custom coated disks for butterfly valves.

High Temperature Aggressive Media

For hot, aggressive chemicals, solvents, and synthetic oils, a Viton® (FKM) seat is the ultimate choice, offering superior chemical resistance at high temperatures. Automating a viton butterfly valve ensures maximum safety in hazardous areas.

Ultra-Pure & Non-Leaching Applications

For semiconductor or pharmaceutical-grade water systems, a valve with a high-purity ptfe seat butterfly valve is essential to prevent any contamination or flavor transfer, ensuring the integrity of the final product.

CASE STUDY: FROM HIGH-RISK SOURCING TO A BULLETPROOF SUPPLY CHAIN

How a leading EPC firm for critical infrastructure projects eliminated budget overruns and timeline risks by switching from brand-name suppliers to a source manufacturer focused on verifiable quality.

The Challenge

The "Brand Premium vs. Quality Gamble" Dilemma

A major EPC (Engineering, Procurement, and Construction) firm specializing in coastal desalination and chemical plants faced a recurring problem. They were forced to choose between:
1) Paying a 30-40% "brand premium" for valves from established European or American manufacturers, which strained project budgets.
2) Sourcing from low-cost factories, which often resulted in "ghost specification" products—valves with falsified material reports (e.g., standard 316 instead of the required Duplex F53) and inconsistent machining that led to on-site installation issues and premature seal failures.

High Cost of Failure in Critical Systems

For their project-critical systems, a single valve failure meant costly shutdowns, contractual penalties, and immense reputational damage. The Total Cost of Ownership (TCO) from the "cheaper" valves was becoming unsustainable. They needed a partner who could deliver the quality of a major brand without the associated price tag, and whose quality claims were backed by undeniable proof, not just a logo.

The Customization Roadblock

A new project required a large batch of DN600 Duplex steel butterfly valves with specific face-to-face dimensions to fit existing pipework, a requirement that most of their previous suppliers were unable or unwilling to accommodate without excessive lead times and costs. This customization roadblock threatened the entire project timeline.

The JRVAL Solution & Result

Solution: Verifiable Manufacturing, Not Brand Marketing

We engaged with the client not as a supplier, but as a transparent manufacturing partner. For their challenging DN600 Duplex valve order, we didn't just promise quality; we delivered proof at every stage:

  • Advanced Metallurgy: We provided a complete material traceability package, including the original MTRs for the Duplex F53 raw material and our own third-party PMI verification reports confirming a Pitting Resistance Equivalent Number (PREN) > 40.
  • Precision Machining: We confirmed our ability to hold their custom face-to-face dimensions by sharing our CNC programming parameters and final QC dimensional reports, ensuring a perfect, drop-in replacement.
  • Guaranteed Sealing & Coating: We supplied certificates for the bi-directional, zero-leakage pressure test (at 1.1x the rated pressure) and a detailed Coating WPS/ITR, verifying the 250µm epoxy layer for superior corrosion protection.

Result: Risk Eliminated, Budget Optimized, Partnership Forged

The client received valves that met the material and performance specifications of the top-tier brands, at a source-direct price point that brought their project back under budget. The seamless installation and proven performance eliminated their risk of failure. We have since become their designated manufacturer for all non-standard and high-specification valve requirements, leveraging our flexible, high-capacity production capabilities to meet their project timelines, every time. They no longer pay for a brand name; they invest in guaranteed performance.

"We used to say, 'You get what you pay for.' With JRVAL, we get more. We get the verifiable material science and build quality of a major brand without the inflated cost. Their documentation package is now our internal standard for what true quality assurance looks like. They don't just sell valves; they sell certainty."

— Lead Mechanical Engineer, [Client Name Withheld for Confidentiality], EPC for Critical Infrastructure

QUALITY & COMPLIANCE CERTIFIED

Our commitment to quality is verified by internationally recognized standards. We provide the documentation to prove it.

ISO Butterfly Valve
CE Valves
BV Valves

Stainless Steel Flange Butterfly Valve - Bare Stem

Ready for automation in corrosive or hygienic environments?

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Frequently Asked Questions for Stainless Steel Valves

Is your top flange strictly compliant with ISO 5211 for mounting our own actuators?

Yes, this is a core strength. Every bare stem valve features a top flange that is precision-machined to strictly adhere to ISO 5211 standards. This guarantees seamless compatibility and alignment with any compliant electric or pneumatic actuator for reliable, trouble-free automation.

How do you guarantee the grade and corrosion resistance of your stainless steel valves (e.g., CF8M, Duplex)?

We offer verifiable material integrity, not just promises. For critical applications, we go beyond standard MTRs. We provide 100% PMI (Positive Material Identification) testing on raw materials to guarantee the specified grade (e.g., CF8M, Duplex steel with PREN > 40). This eliminates the risk of using counterfeit materials and ensures maximum corrosion resistance for your application.

Can your factory handle a high-volume order for a large project with a tight deadline?

Yes, we are built for scale. As a source manufacturer located in China's valve industrial heartland, we have immense production flexibility. For large or urgent projects, we leverage our coordinated regional supply chain under our direct quality control to meet any deadline without compromising quality.

What is your warranty, and how available are spare parts like seats and O-rings?

Our concentric flanged valves come with a comprehensive 2-year warranty against manufacturing defects. Because all components (seats, seals, bushings) are machined to universal standards, sourcing spare parts is simple and cost-effective, ensuring easy long-term maintenance for your automated systems.

Our plant uses mixed flange standards (e.g., ANSI & DIN). Can you guarantee a fit?

Absolutely. This is a common problem we solve. We custom-machine valve flanges to your exact specifications (e.g., ANSI B16.5, DIN EN 1092-1, JIS B2220). This ensures a precise, dimensionally accurate, and leak-proof fit for each specific connection in your pipeline, eliminating risks of misalignment.

OUR MANUFACTURING GUARANTEE

Free Sample for Qualification

Qualify us as your new manufacturing partner. We offer free samples for you to conduct in-house testing and directly compare our machining precision, material quality, and build against any competitor.

Comprehensive Warranty

We stand by our craftsmanship with a 2-year warranty. Because all parts are made to international standards, long-term maintenance is simplified and spare parts are readily available globally.

Full Documentation Package

Go beyond a simple certificate. Every shipment can be backed by a full quality dossier, including MTRs, pressure test reports, and coating inspection reports for complete traceability and peace of mind.

Request a Free Sample & Docs
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