Modu-Seal Series Stainless Steel Wafer Type Butterfly Valve - Worm Gear

1.5in~48in; PN6~PN20 (Class125~150)

Product Advantages

icon Elasticity Excellence: High-resilience EPDM/PTFE blend (60%+ rubber) withstands 200°C CIP cycles with industry-leading elasticity retention (2-year field data verified).

icon Modular Maintenance: Modular seat replacement reduces 90% maintenance costs and 80% downtime versus traditional valves

icon Space-Optimized Mounting: Kitz-inspired two-ear clamp cuts weight by 30%-40% and boosts installation efficiency 50% for compact layouts

icon Passivated 304/316L Steel: Acid-washed and passivated surface is smooth, mark-free, with permanent clear cast markings.

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	Wafer
Actuation	Worm Gear
Size	DN40~DN1200 (1 1/2in~48in )
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.)
Shaft	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	EPDM, HTEPDM, NBR (Nitrile Rubber / Buna-N), SIL (VMQ), FKM (VITON™)

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

RELIABLE MANUAL CONTROL, ENGINEERED FOR DURABILITY

Our worm gear operated butterfly valves provide precise, reliable manual flow control. The robust gearbox and high-strength components are engineered for demanding industrial environments where durability and safety are paramount.

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, Reliable Design

With two decades of field validation in automated applications, our valve designs are proven to be sound and reliable. This experience means our products deliver consistent, dependable performance when integrated into complex control systems.

MANUAL CONTROL ACROSS INDUSTRIES

Our gear-operated stainless steel butterfly valves are specified for applications where dependable manual operation, precise throttling, and long-term durability are essential.

Municipal Waterworks

In water distribution networks, our valves are used for isolating sections for maintenance. The worm gear provides slow, controlled closure to prevent water hammer. As a trusted wafer type butterfly valve supplier, we provide durable solutions for public utilities.

HVAC Balancing & Isolation

The worm gear operator allows for precise manual balancing of chilled and hot water loops. The position indicator on the gearbox provides clear visual feedback, making our HVAC butterfly valve ideal for commercial building systems.

Chemical Dosing & Transfer

For manual transfer lines of compatible chemicals, the stainless steel construction offers excellent resistance. The secure self-locking gear ensures precise amounts are dosed, making the butterfly wafer type valve a safe choice for controlled operations.

Marine & Ballast Systems

Onboard ships, our valves are used for ballast, bilge, and cooling water systems where robust manual control is critical. The compact design of the marine butterfly valve and its resistance to saltwater make it a staple in shipbuilding.

Pulp & Paper Processing

Used in stock lines, liquor, and white water systems, our valves handle mildly abrasive and corrosive media. The robust gear operator can easily cut through fibrous content to ensure a tight shutoff for a standard PN16 butterfly valve application.

Agricultural Irrigation

In large-scale irrigation systems, our valves control water flow from main lines to distribution zones. A gear-operated 6 inch butterfly valve provides the necessary torque for reliable manual operation in extensive piping networks.

Mining & Dewatering

For slurry lines and dewatering circuits, a reliable manual valve is essential for isolation. The robust design of the stainless steel wafer butterfly valve ensures it can withstand the harsh conditions of mining operations while providing secure shutoff.

Fire Protection Systems

As main control valves in fire sprinkler systems, gear operators are preferred for their deliberate, non-accidental operation. Our reliable butterfly valve for water line applications ensures water is available when needed and securely isolated for maintenance.

General Industrial Utilities

For plant-wide compressed air, process water, and other utility lines, our valves provide dependable isolation and control. The simple, robust design makes our industrial butterfly valve a cost-effective and low-maintenance choice for facility managers.

BUILT FOR REAL-WORLD OPERATIONS

High-Pressure Differential Lines

The gearbox multiplies operator input, allowing for easy operation against high pressure. The butterfly valve worm gear actuator ensures smooth and controlled opening and closing under heavy dynamic torque, preventing operator strain and ensuring safety.

Systems Requiring Precise Throttling

The fine control offered by the handwheel and the self-locking nature of the gear allow operators to set and maintain specific flow rates accurately. This is critical for achieving optimal flow control with butterfly valve in balancing and process applications.

High Vibration Pipelines

Unlike lever-operated valves which can be affected by pipeline vibration, the worm gear mechanism is inherently resistant to movement. This ensures the valve's set position remains stable near pumps, compressors, and other sources of vibration, making this butterfly valve valve a reliable choice.

Infrequent Operation / Isolation

For valves that remain in one position for long periods, the gearbox provides a reliable method of operation when needed. The high mechanical advantage overcomes any potential seating friction, ensuring the stainless butterfly valve can be operated reliably after long static periods.

Large Diameter Pipelines

Operating large valves manually requires significant torque. The gear operator makes it physically possible and safe to operate valves up to DN1200. This is essential for main water lines, large industrial piping, and applications where a simple lever is impractical. A perfect application for the wafer butterfly valve design.

Outdoor & Weather-Exposed Areas

The enclosed and gasket-sealed gearbox protects the gearing mechanism from rain, dust, and corrosive atmospheres. The full stainless steel body and stem ensure that the 12 inch butterfly valve and other sizes withstand long-term outdoor exposure without seizing or degradation.

Industrial Process Water

With a CF8M/SS316 body and disc, our valves resist corrosion from treated industrial water, cooling tower water, and effluent streams. The durable construction of the butterfly valve ss ensures long-term reliability in plant utility applications.

Food Grade Liquids

When fitted with a food-grade EPDM or Silicone seat, our valves are suitable for manual lines in breweries, dairies, and beverage plants. The smooth, passivated surface of the butterfly valve stainless steel components resists bacterial growth and is easy to clean.

Mild Chemical Solutions

The SS316 body and a wide range of available seat materials (EPDM, NBR, FKM) provide compatibility with a variety of acids, alkalis, and solvents. The simple and robust design of the wafer valve makes it a cost-effective choice for chemical processing lines.

Saltwater & Marine Environments

The excellent chloride resistance of SS316 (CF8M) makes this valve ideal for seawater cooling systems, ballast tanks, and desalination pre-treatment. Our CF8M butterfly valve provides durable, long-term performance in highly corrosive marine conditions.

Potable Water Systems

With an EPDM seat that meets international potable water standards, our valves are safe for drinking water applications. The reliable sealing of the water butterfly valve prevents leakage and ensures the integrity of municipal and commercial water supplies.

Abrasive Slurries

In applications with suspended solids like kaolin, lime, or coal slurries, the resilient EPDM or NBR seat provides an effective seal while resisting wear. The design of our rubber lined butterfly valve allows for easy seat replacement, extending the valve's service life.

CASE STUDY

How a major desalination facility mitigated operational risks by upgrading to JRVAL's robust Worm Gear Operated Butterfly Valves.

Project: Phased replacement of 48 units of failing DN300-DN600 manual butterfly valves on their primary seawater intake and brine discharge lines.

THE CHALLENGE: PREMATURE GEARBOX FAILURES & OPERATIONAL RISK

Mr. David Chen, the facility's Operations Manager, was dealing with systemic failures of their existing manually operated butterfly valves. The gear operators from their previous supplier were suffering from severe corrosion due to the saline environment. This led to seized gearboxes, broken handwheels, and an inability to reliably isolate sections for maintenance. Operating these failing valves required excessive force, posing a safety risk to personnel and making precise flow control impossible.

THE SOLUTION: AN INTEGRATED, DURABLE VALVE & ACTUATOR SYSTEM

The client's engineering team required a replacement solution where the durability of the gear operator was as rigorously specified as the valve body itself. JRVAL was selected after a thorough technical evaluation focused on material integrity and integrated design.

Robust Gearbox for Harsh Environments

The primary pain point was gearbox failure. We addressed this directly by providing our standard worm gear operator featuring:
- An IP67-rated ductile iron gearbox with a multi-layer epoxy coating, specifically designed to prevent moisture and salt ingress.
- A stainless steel input shaft and position indicator, eliminating common corrosion points. The self-locking nature of the worm gear also ensured the valve disc held its position against high flow, preventing water hammer during throttling operations.

Verifiable Material & Performance Specifications

To assure long-term performance in a corrosive seawater application, we provided a complete qualification dossier:
- Full MTRs for the SS316L (ASTM A351 CF3M) valve bodies, with Molybdenum content verified at 2.3% (well above the 2.0% minimum) to ensure superior pitting corrosion resistance.
- Our high-resilience EPDM seat (60%+ rubber content) demonstrated suitability for continuous seawater exposure, supported by 2-year field data from similar applications.
- We facilitated a client-appointed third-party inspector (TPI) to witness hydrostatic testing, which confirmed bi-directional zero leakage (API 598 Rate A) at 1.5 times the rated pressure.

Manufacturing Control & Supply Chain Assurance

As the manufacturer of both the valve and the gear assembly, we offered end-to-end quality control. Our vertical integration, from our own SS316L foundry to the final pressure testing, allowed us to commit to a reliable production schedule and deliver the first batch of 24 units in 6 weeks, 50% faster than the 12-14 week lead time quoted for European OEM replacements.

VERIFIED 18-MONTH PERFORMANCE OUTCOMES

The project's success was measured not just at installation, but through long-term operational data gathered 18 months post-commissioning.

► Asset Reliability: Zero gearbox failures or seized valves reported across all 48 installed units, drastically improving operational uptime.
► Capital Expenditure Reduction: The project was completed at a 22% lower acquisition cost compared to like-for-like quotes from the facility's incumbent European OEM supplier.
► Maintenance Efficiency: An estimated 40% reduction in valve-related maintenance man-hours in the first year, as unplanned repairs were eliminated.
► Guaranteed Longevity: The installation is backed by our comprehensive 2-year warranty covering both the valve and the integrated worm gear operator, providing long-term peace of mind.

"The previous valves were a constant operational headache. The durability of JRVAL's IP67 gearboxes in our highly corrosive environment has been impressive. We no longer worry about being able to isolate a line during a shutdown. It’s not just about the valve; it’s about the reliability of the complete, factory-assembled unit. JRVAL delivered that."

David Chen Operations Manager, Desalination Facility

QUALITY & COMPLIANCE CERTIFIED

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

Quick Change Seat Stainless Steel Wafer Type Butterfly Valve - Worm Gear

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Butterfly Valve Dimensions

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Sample MTC (EN 10204 3.1) - Material Traceability

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TECHNICAL & OPERATIONAL FAQ

What makes your worm gear operator reliable for industrial or outdoor environments?

Our gear operators are engineered for durability. They feature a ductile iron housing with an IP67 rating, ensuring complete protection against dust and water ingress. The housing is protected by a multi-layer epoxy coating, while the input shaft is stainless steel to prevent corrosion—a common failure point in inferior designs.

You claim "zero leakage." What standard does this meet and is it bi-directional?

Yes, our "zero leakage" commitment meets the API 598 Rate A standard for bi-directional, bubble-tight shutoff. This is achieved through a combination of a precision-machined disc and our high-resilience EPDM seat (60%+ rubber content), which ensures a reliable seal even after thousands of cycles.

Can this valve be used for throttling, and does the gear hold its position under pressure?

Absolutely. The core benefit of our worm gear mechanism is that it is self-locking. This allows for precise flow control (throttling) and ensures the valve disc remains stable in any position without "disc flutter" or drifting, even in high-flow conditions. No additional braking mechanism is required.

How do you guarantee the quality and traceability of the stainless steel?

As a foundry-direct manufacturer, we control the entire process. Every valve is supplied with a full Material Test Report (MTR) from our own foundry. We ensure chemical compositions, like the Nickel content in our SS316, exceed the minimum international standards for enhanced performance and longevity.

What is the warranty, and are spare parts like seats available?

Our gear-operated valves are backed by a comprehensive 2-year warranty. The modular design allows for easy field replacement of the EPDM seat, the primary wear part. This significantly lowers the Total Cost of Ownership (TCO) by avoiding the need to replace the entire valve assembly for routine maintenance.