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Assembly & Material

Tapped Lug Type Stainless Steel Butterfly Valves

Engineered for dead-end service, our lug-style stainless steel valves combine superior material integrity with precision manufacturing. The threaded inserts allow for safe downstream maintenance without draining the entire system, making them indispensable in critical process lines.

Bare Stem Lug Stainless Steel Valve

Bare Shaft Actuation

Engineered with a standardized ISO 5211 mounting interface, this bare stem valve is the definitive choice for global integration. This universal standard guarantees a seamless and reliable connection with virtually any actuator brand—pneumatic, electric, or hydraulic—available in your local market.

  • Superior Material Composition: Cast with ASTM A351 CF8 containing 9% Nickel—the maximum allowable—to ensure superior corrosion resistance.
  • Lug Hole Positional Accuracy: True position of the threaded lug hole pattern is controlled to an exacting tolerance of ±0.10 mm and 100% gauge verified.
  • High-Density Casting: Our zero-porosity casting process guarantees freedom from surface porosity, shrinkage, or unauthorized weld repairs.
  • Patented Short-Neck Design: Our exclusive short-neck profile enables more compact system design and easier pipe insulation. It provides crucial extra clearance for actuators and surrounding equipment in space-sensitive applications.

Round/ Square Shaft Available

Size: DN40~DN1200; 1.5"~48"

Pressure: PN6~PN20; Class 125~150

Standards: All Standards Met

Bare Shaft Best For: Cost-Effective Sourcing; Global OEMs & System Integrators; Versatile Inventory Management
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Lever Operated Lug Stainless Steel Valve

Lever Handle Actuation

For rapid, manual on/off control. The lever handle provides quick 90-degree actuation and clear visual position indication, perfect for smaller diameter lines requiring frequent, straightforward operation.

Safety Lockout Device (LOTO) Available

Size: DN40~DN200; 1.5"~8"

Pressure: PN6~PN20; Class 125~150

Standards: All Standards Met

Best For: OEM skid manufacturing, marine engine rooms, HVAC mechanical rooms, and any installation with severe spatial constraints where traditional valves won't fit.
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Worm Gear Operated Lug Stainless Steel Valve

Worm Gear Actuation

Provides mechanical advantage for easy and precise manual control of larger valves or high-pressure lines. The self-locking gearbox ensures the valve stays in position against flow-induced torque.

Supervisory Tamper Switch Available

Size: DN40~DN1200; 1.5"~48"

Pressure: PN6~PN20; Class 125~150

Standards: All Standards Met

Best For: Large diameter lines (≥ DN250), high pressure dead-end service, and applications requiring throttling or slow, controlled operation.
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Pneumatic Actuated Lug Stainless Steel Valve

Pneumatic Actuation

The choice for high-speed, high-cycle automation. Pneumatic actuators offer unparalleled reliability and speed, with spring-return options for fail-safe operation in critical chemical processing or safety systems.

On/Off, Modulating Available

Size: DN40~DN1200; 1.5"~48"

Pressure: PN6~PN20; Class 125~150

Standards: All Standards Met

Best For: Automated chemical dosing, high-cycle isolation, and systems requiring fail-safe (fail-open or fail-close) functionality.
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Electric Actuated Lug Stainless Steel Valve

Electric Actuation

For precise, remote automated control. Electric actuators integrate seamlessly with PLC and SCADA systems, offering modulating control for flow regulation and reliable operation where compressed air is not available.

On/Off; Modulating; VF (Variable Frequency) & Fail-Safe Available

Size: DN40~DN1200; 1.5"~48"

Pressure: PN6~PN20; Class 125~150

Standards: All Standards Met

Best For: Remote facility control, precise process throttling, integration into complex automation systems, and marine applications.
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Core Advantages of JRVAL Lug SS Valves

  • Ultimate Corrosion Resistance: Cast with ASTM A351 CF8 containing 9% Nickel—the highest end of the standard—for unmatched durability.
  • Flawless Installation: Lug hole pattern is controlled to a ±0.10 mm tolerance and 100% gauge-verified, eliminating flange misalignment.
  • Zero-Porosity Guarantee: High-density casting ensures a solid body free from porosity or shrinkage, maximizing strength and pressure-holding capability.
  • Patented Short-Neck Design: Our exclusive short-neck profile enables more compact system design and easier pipe insulation. It provides crucial extra clearance for actuators and surrounding equipment in space-sensitive applications.

Flange Type Stainless Steel Butterfly Valves

With integral flanges for a secure, bolted connection, these valves offer maximum rigidity and sealing integrity. They are the premier choice for large-diameter, high-pressure pipelines in aggressive chemical, marine, and industrial environments.

Bare Stem Flange Stainless Steel Valve

Bare Stem Actuation

Engineered with a standardized ISO 5211 mounting interface, this bare stem valve is the definitive choice for global integration. Its robust body provides a stable platform for any high-torque actuation system required by large-scale projects.

  • Precision-Matched Flanges: Customized from pipeline measurements and reinforced per standards (e.g., HG/T) to ensure a perfect, leak-free seal.
  • Traceable Craftsmanship: ISO9001 casting with permanent markings enables lifetime quality tracking from raw material to final product.
  • Superior Material (9% Nickel): Cast with ASTM A351 CF8 at maximum allowable Nickel for superior corrosion resistance and zero porosity.

Round/ Square Shaft Available

Size: DN40~DN1200; 1.5"~48"

Pressure: PN6~PN20; Class 125~150

Standards: All Standards Met

Best For: Large-scale EPC projects, skid manufacturers, and applications with specific, pre-defined actuator requirements.
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Lever Operated Flange Stainless Steel Valve

Lever Handle Actuation

An uncommon but available option for smaller flanged valves where quick manual shutoff is needed. Provides a simple, direct-control solution for accessible pipelines.

Safety Lockout Device (LOTO) Available

Size: DN40~DN200; 1.5"~8"

Pressure: PN6~PN20; Class 125~150

Standards: All Standards Met

Best For: Small-bore flanged utility lines and manual bypass lines in process plants.
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Worm Gear Operated Flange Stainless Steel Valve

Worm Gear Actuation

The standard for manual flanged valves. The gearbox provides the necessary torque for effortless operation of high-pressure and large-diameter lines, ensuring precise and safe flow control.

Supervisory Tamper Switch Available

Size: DN40~DN1200; 1.5"~48"

Pressure: PN6~PN20; Class 125~150

Standards: All Standards Met

Best For: Main isolation valves in chemical plants, shipbuilding, offshore platforms, and municipal water mains.
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Worm Gear Operated Flange Stainless Steel Valve

Pneumatic Actuation

The choice for high-speed, high-cycle automation. Pneumatic actuators offer unparalleled reliability and speed, with spring-return options for fail-safe operation in critical chemical processing or safety systems.

On/Off, Modulating Available

Size: DN40~DN1200; 1.5"~48"

Pressure: PN6~PN20; Class 125~150

Standards: All Standards Met

Best For: Automated chemical dosing, high-cycle isolation, and systems requiring fail-safe (fail-open or fail-close) functionality.
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Electric Actuated Flange Stainless Steel Valve

Electric Actuation

Combines the ultimate sealing integrity of a flanged body with the precision of electric automation. Ideal for critical, large-scale process control and remote pipeline management.

On/Off; Modulating; VF (Variable Frequency) & Fail-Safe Available

Size: DN40~DN1200; 1.5"~48"

Pressure: PN6~PN20; Class 125~150

Standards: All Standards Met

Best For: Automated main pipeline control, high-value media, and integration into plant-wide DCS/SCADA systems.
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Core Advantages of JRVAL Flange SS Valves

  • Precision-Matched Flanges: Flanges are customized from pipeline measurements and reinforced per standards (e.g., HG/T) to guarantee a perfect, leak-free seal.
  • Traceable Craftsmanship: ISO9001 casting with permanent markings enables lifetime quality tracking from raw material to final assembled valve.
  • Superior Material (9% Nickel): Cast with ASTM A351 CF8 at the highest allowable Nickel content for superior corrosion resistance and extended life.

Wafer Type Stainless Steel Butterfly Valves

Our stainless steel wafer valves offer compact, cost-effective, and versatile solutions. From robust, heavy-body designs for industrial use to modular, quick-change seats for hygienic applications, JRVAL provides the perfect wafer valve for your needs. 

Wafer Heavy Body Stainless Steel Valve

Heavy Body Series Stainless Steel Wafer (All Actuators)

The ultimate industrial wafer valve. Its heavy-walled body exceeds standards, providing an enhanced safety margin and superior structural integrity for demanding applications. Available with bare stem, lever, gear, pneumatic, or electric actuators.

  • Robust Construction: Heavy-walled body significantly exceeds standard thickness requirements (e.g., HG/T, GOST), ensuring superior strength.
  • Superior Material (9% Nickel): Cast with ASTM A351 CF8 at maximum Nickel content for guaranteed corrosion resistance.

Size: DN40~DN1200; 1.5"~48"

Pressure: PN6~PN20; Class 125~150

Actuator Options: Lever; Worm Gear; Pneumatic; Electric

Standards: All Standards Met, esp. GOST, HG/T.

Best For: Chemical processing, water treatment, and general industrial use where durability and safety are paramount.
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Uni-Fit Electric Wafer Butterfly Valve in Stainless Steel

Uni-Fit Series Wafer SS (All Actuators)

The ultimate solution for rapid integration. The Uni-Fit series combines universal flange compatibility with a lightweight body, ensuring fast, cost-effective installation in systems worldwide. It comes pre-fitted with a robust electric actuator for immediate, reliable automation.

  • Universal Flange Fit: Designed to mate with multiple global flange standards (esp. JIS 16K, KS), eliminating compatibility guesswork and simplifying inventory for international projects.
  • Rapid Installation Design: The compact, lightweight wafer body significantly reduces handling effort and installation time, lowering labor costs and minimizing system downtime during upgrades.

Size: DN40~DN1200; 1.5"~48"

Pressure: PN6~PN20; Class 125~150

Actuator Options: Lever; Worm Gear; Pneumatic; Electric

Standards: All Standards Met, esp. JIS 16K/KS.

Best For: Water/wastewater treatment, HVAC systems, shipbuilding, and industrial applications requiring reliable, automated flow control with maximum installation flexibility.
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Modu-Seal™ Wafer Stainless Steel Valve

Modu-Seal Series Wafer SS (All Actuators)

A revolutionary design for hygienic applications demanding minimal downtime. This valve's modular seat allows for rapid, in-line replacement, drastically reducing maintenance costs. Available with bare stem, lever, gear, or pneumatic actuators.

Size: DN40~DN1200 [1.5in ~ 48in]; Pressure: PN6 ~ PN20 [Class 125/150]

MOQ: 1 Set; Standards: All Standards Met, esp. GOST.

  • Modular Maintenance: Reduce maintenance costs by 90% and downtime by 80% with quick-change seats.
  • Elasticity Excellence: High-resilience seat blend withstands 200°C CIP/SIP cycles with industry-leading elasticity retention.

Size: DN40~DN1200; 1.5"~48"

Pressure: PN6~PN20; Class 125~150

Actuator Options: Lever; Worm Gear; Pneumatic; Electric

Standards: All Standards Met

Best For: Low-downtime requirements.
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High-Performance Stainless Steel Valves

Engineered for the most severe services, these eccentric valves minimize seat wear and operating torque, providing superior, long-lasting sealing in critical applications from high-cycle throttling to zero-leakage isolation.

Double Eccentric Stainless Steel Valve

Double Eccentric (Wafer) SS (All Actuators)

The high-performance workhorse. Its double-offset design lifts the disc off the seat, drastically reducing wear and extending service life in throttling and high-cycle services. Typically supplied with worm gear or automated actuators for precise control.

Size: DN40~DN2700 [1.5in ~ 108in]; Pressure: PN6 ~ PN63 [Class 125~300]

  • Pinless Shaft Design: Key/square shaft connection eliminates pin failure points, ensuring stability in high-frequency and high-vibration environments.
  • Bidirectional Sealing: The elastic seat and spherical disc design provides tight shutoff in both directions, preventing contamination and backflow.

Size: DN40~DN2800; 1.5"~112"

Pressure: PN6~PN63; Class 125~150

Actuator Options: Lever; Worm Gear; Pneumatic; Electric

Standards: All Standards Met

Best For: Throttling services, chemical processing, power generation, and high-cycle applications where longevity is key.
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Triple Eccentric Stainless Steel Valve

Triple Eccentric (Flange/Lug) SS (All Actuators)

The apex of valve technology for zero-leakage performance. The friction-free, triple-offset design with a metal-to-metal seal ensures absolute, bubble-tight shutoff in high-pressure, high-temperature, and cryogenic services.

Size: DN40~DN2800 [1.5in ~ 112in]; Pressure: PN10 ~ PN400 [Class 150~2500]

  • Bubble-tight Sealing: Tri-eccentric geometry with laminated or solid metal seals achieves API 598 bubble-tight zero leakage, even in severe conditions.
  • Friction-Free Operation: The cone-in-cone seating eliminates friction during operation, preventing seat wear and ensuring low torque and a long service life.

Size: DN40~DN2700; 1.5"~108"

Pressure: PN6~PN400; Class 125~2500

Actuator Options: Lever; Worm Gear; Pneumatic; Electric

Standards: All Standards Met

Best For: Critical isolation, cryogenic service, high-temperature steam, oil & gas, and any application where leakage is not an option.
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Stainless Steel Material Comparison

Explore the high-performance stainless steel grades used for our butterfly valves and select the optimal solution for your application.

Austenitic Stainless Steel

CF8 (AISI 304)

Key Features: The most common and versatile stainless steel, offering good general-purpose corrosion resistance.

Corrosion Resistance: Good resistance to atmospheric corrosion, water, many acids (e.g., nitric acid), and alkaline solutions.

Typical Applications: Water treatment, food industry, architectural, general chemical services. Not recommended for chloride environments.

Cost: Economical

CF8M (AISI 316)

Key Features: An enhancement of 304 with added Molybdenum (Mo) for significantly improved corrosion resistance, especially to chlorides.

Corrosion Resistance: Excellent resistance to pitting and crevice corrosion, making it suitable for marine and chemical environments.

Typical Applications: Chemical processing, offshore platforms, pharmaceuticals, coastal water systems.

Cost: Moderate

CF3 (AISI 304L)

Key Features: The low-carbon ("L") version of 304. It maintains corrosion resistance after welding without needing post-weld annealing.

Corrosion Resistance: Similar to 304 but with better resistance to intergranular corrosion, making it ideal for welded structures.

Typical Applications: Large-diameter valves requiring on-site welding, chemical tanks.

Cost: Similar to 304

CF3M (AISI 316L)

Key Features: The low-carbon ("L") version of 316, combining its chloride resistance with excellent weldability.

Corrosion Resistance: Superior resistance to intergranular corrosion compared to 316. A very common high-performance grade.

Typical Applications: Pharma, fine chemicals, food & beverage, and services requiring high weld integrity and cleanliness.

Cost: Moderate to High

Duplex Stainless Steel

2205 (CD3MN / 1.4462)

Key Features: Combines austenitic and ferritic benefits. Strength is roughly double that of 316, with strong resistance to Stress Corrosion Cracking (SCC).

Corrosion Resistance: Far superior to 316L, especially in chloride-containing environments.

Typical Applications: Desalination, oil & gas industry, chemical tankers, wastewater treatment.

Cost: High

2507 (CE3MN / 1.4410)

Key Features: A "Super Duplex" steel with higher strength and corrosion resistance than 2205. PREN value > 40.

Corrosion Resistance: Extremely high resistance to pitting, crevice, and uniform corrosion.

Typical Applications: Harsh marine engineering, Flue-Gas Desulfurization (FGD), high-chloride concentration services.

Cost: Very High

Super Austenitic & Special Alloys

1.4529 (Alloy 926)

Key Features: A high-molybdenum (6Mo) super-austenitic stainless steel with corrosion resistance comparable to some nickel alloys.

Corrosion Resistance: Extremely high resistance to pitting and crevice corrosion in halide media, especially chlorides.

Typical Applications: FGD systems, acidic gas handling, phosphoric acid production, seawater heat exchangers.

Cost: High

CN7M (Alloy 20)

Key Features: An "acid-resistant" alloy developed specifically for sulfuric acid service. Bridges the gap between stainless steels and nickel alloys.

Corrosion Resistance: Excellent resistance to hot sulfuric acid across a wide range of concentrations, plus strong resistance to chloride SCC.

Typical Applications: Sulfuric acid processing, plastics, pharmaceuticals, fertilizer production, and other highly corrosive services.

Cost: Very High

Start with the Right Material

Choosing the correct valve body material is the first and most critical step. Stainless steel is the champion of corrosion resistance, but understanding its advantages against other common materials ensures optimal performance and cost-effectiveness.

Feature Stainless Steel (SS) Carbon Steel (WCB) Ductile Iron (DI) Bronze / Copper Alloys
Corrosion Resistance Excellent Poor (requires coating) Fair Very Good (especially in marine)
Temperature Range Very Wide (Cryogenic to High Temp) Wide (but less than SS) Limited Moderate
Strength & Pressure Very High Highest High Moderate
Cost High Moderate Low Very High
Best Applications Chemicals, Food & Beverage, Pharma, Marine, Corrosive Media Oil & Gas, Steam, High-Pressure Industrial (non-corrosive) Water, Wastewater, HVAC (general service) Seawater, Desalination, Shipbuilding

The JRVAL Advantage

We are not just a supplier; we are your vertically integrated manufacturing partner. From raw casting to final assembly, we control every step to deliver stainless steel valves that meet the highest international standards for performance and reliability.

Qualified Quality

ISO9001, BV, and CE certified. We provide complete test reports for material, heat treatment, and mechanical performance with every shipment.

Vertically Integrated Factory

From raw casting and precision machining to final assembly, we control the entire production line. This ensures consistent quality and faster lead times.

Risk-Free Procurement

A Free Sample. Compare our valve quality against any other brand before you purchase. Experience the JRVAL difference firsthand.

2-Year Warranty

We stand by our products with a comprehensive warranty. Valve body, disc, and seat are all available for new spare parts replacement if needed.

Find Your Perfect Stainless Steel Valve Solution

Our engineers are ready to help you select the ideal stainless steel butterfly valve for your specific application and provide a competitive quote. Contact us today to request your free sample and consultation.

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