Heavy-Body Series Carbon Steel Wafer Type Butterfly Valve - Bare Shaft

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

Product Advantages

icon Robust Construction: Features a heavy-walled body that significantly exceeds the thickness requirements of standards like HG/T 3704, ensuring superior structural integrity and an enhanced safety margin for demanding applications.

icon Guaranteed Material Integrity: We guarantee an optimized composition for our Carbon Steel, eg. ASTM A216 WCB, maximizing key elements like Manganese for strength while strictly minimizing impurities like Phosphorus and Sulfur, with a full MTC for traceability.

Standards and Certifications

Design and Manufacture: GB/T 12238-1989; GOST 12815-1980; GOST 5263-1975

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	Bare Stem: With mounting flange per ISO 5211 Manual: Hand Lever, Worm Gearbox Automated: Pneumatic Actuator (Double Acting/Spring Return), Electric Actuator
Size	1.5in ~ 48in (DN40~DN1200)
Pressure	PN6 ~ PN20 / ANSI Class 125 ~ 150
Testing Pressure	Shell: 1.5 x Rated Pressure; Seat: 1.1 x Rated Pressure (acc. to API 598)
Medium	Water, Oil, Gas, Steam, Slurries, and various Corrosive Media
Medium Temperature	-25°C to +180°C (-13°F to +356°F) Dependent on seat material

Material of the Valve

Body	Carbon Steel (WCB, WCC) Low-Temp Carbon Steel (LCB, LCC, LC1)
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	Elastomers: EPDM, HTEPDM, NBR (Nitrile Rubber / Buna-N), SIL (VMQ), FKM (VITON™), HYPALON™ Plastics: PTFE, PFA, UHMWPE
Coating	• System: Fusion Bonded Epoxy (FBE) • Standard: Internal & External Coating • Dry Film Thickness (DFT): 200-250 µm

THE INDUSTRY STANDARD FOR RELIABLE FLOW CONTROL

Our carbon steel wafer butterfly valves are the cornerstone of industrial fluid control, offering an exceptional balance of strength, performance, and cost-effectiveness. From raw material casting to final pressure testing, we ensure every valve provides reliable, leak-free service in general-purpose and utility applications.

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.

ENGINEERED FOR ESSENTIAL INDUSTRIES

Our carbon steel wafer butterfly valves are trusted across a multitude of sectors for their reliability and adaptability. Below are some of the core industries where our valves ensure efficient and safe operations.

Municipal Water Supply

For treatment plants and distribution networks, our valves provide dependable isolation and control. An Awwa Butterfly Valve configuration ensures compliance with public works standards for potable water systems.

HVAC & Commercial Buildings

Our valves are a core component in large-scale heating and cooling loops. A butterfly valve for chilled water system applications offers precise flow balancing and reliable shut-off, maximizing energy efficiency.

Fire Protection Systems

In critical life-safety applications, reliability is non-negotiable. The simple, robust design of our wafer style butterfly valve makes it an ideal choice for shut-off duty on main sprinkler lines and fire hydrants.

Food & Beverage (Utilities)

For utility lines such as process water, glycol, and compressed air, a carbon steel epdm seat butterfly valve provides a cost-effective and compliant solution without compromising on the hygienic standards of the plant.

Pulp and Paper Industry

On general service lines for process water and chemical additives, a resilient seated or rubber lined butterfly valve offers dependable performance, handling the demanding environment of paper production facilities effectively.

Power Generation

In cooling water intake and circulation systems, our valves provide essential flow control. We manufacture a robust large diameter butterfly valve designed for the high-volume requirements of power plant operations.

General Industrial Services

From factory compressed air lines to equipment cooling loops, the versatile wcb wafer butterfly valve is the go-to choice for countless applications requiring durable, on-off or throttling service for non-corrosive fluids.

Mining & Dewatering

In mine dewatering and water management systems, our heavy-duty rubber lined butterfly valve offers excellent resilience against mildly abrasive water, ensuring reliable operation in rugged and demanding site conditions.

Agriculture & Irrigation

For main and sub-line flow control in large-scale irrigation projects, a common 6 inch butterfly valve provides an economical and easy-to-operate solution for managing water distribution efficiently across vast areas.

DESIGNED FOR DIVERSE OPERATING ENVIRONMENTS

Our carbon steel wafer valves are engineered not just for specific industries, but to thrive under common operational challenges, ensuring consistent performance and ease of use.

Moderate Pressure Systems

Built to industry standards, our valves are ideal for common pipeline requirements. A pn16 butterfly valve configuration is standard, ensuring safe and reliable operation in the vast majority of water, air, and utility systems.

Space-Constrained Installations

The inherent design of a wafer type butterfly valve provides a minimal face-to-face dimension. This makes it perfect for tight spaces, retrofits, and skid-mounted systems where every inch of pipeline length counts.

Automated Process Control

The bare stem with a standardized top mounting pad makes automation simple. Our valves fully comply with iso 5752 butterfly valve standards, ensuring seamless integration with electric or pneumatic actuators from any major brand.

General Purpose Fluid Handling

As the workhorse of fluid control, our butterfly valve for water line applications also excels in handling compressed air, neutral gases, and various oils, making it a versatile asset for plant-wide utility management.

Cost-Sensitive Projects

By optimizing our casting and machining processes, we offer a high-quality wholesale butterfly valve solution. This provides engineers and procurement managers with a reliable valve that meets budget without sacrificing performance.

Quick Installation & Maintenance

The lightweight nature of the wafer butterfly design simplifies handling and speeds up installation. It is easily centered between flanges using the bolt circle, significantly reducing labor time and costs compared to heavier valve types.

MATERIAL SELECTION FOR MEDIA COMPATIBILITY

While the carbon steel body provides strength, the valve seat is critical for chemical compatibility and sealing. We offer a range of seat materials to handle various media safely and effectively.

Neutral & Potable Water

For most water applications, an epdm lined butterfly valve is the industry standard. EPDM offers excellent resistance to water, weather, and ozone, providing a long-lasting, reliable seal for municipal and industrial water lines.

Oils, Fuels, & Greases

When handling petroleum-based products or compressed air with lubricant carryover, a butterfly valve nbr seat is the optimal choice. NBR (Nitrile) rubber provides superior resistance to oils and hydrocarbons, preventing seat swelling and degradation.

Mildly Corrosive Chemicals

For applications involving a wider range of chemicals where carbon steel is still suitable, a ptfe seat butterfly valve offers a chemically inert sealing surface, protecting the valve internals and ensuring process purity.

Seawater & Marine Environments

To protect the carbon steel body from external salt spray and internal corrosion, we recommend our specialized epoxy coated butterfly valves. This durable coating provides a robust barrier, extending the valve's life in coastal or offshore applications.

Higher Temperature Service

For hot air, low-pressure steam, or fluids up to 180°C, specifying a viton butterfly valve is crucial. The FKM Viton seat maintains its sealing integrity and chemical resistance at elevated temperatures where EPDM or NBR would fail.

Abrasive Powders & Slurries

In applications with fine, abrasive particles like cement or light slurries, a high-quality soft seat butterfly valve made from natural rubber or specialized elastomers provides superior sealing and resistance to erosive wear, ensuring a tight shut-off.

Case Study: Industrial HVAC System Upgrade

A data-driven approach to sourcing reliable bare shaft butterfly valves, achieving a 22% cost reduction without compromising on material integrity or long-term performance.

Project: Facility-wide upgrade of the Chilled Water and Cooling Tower circulation system, requiring 80 units of DN150-DN400 Carbon Steel Wafer Butterfly Valves.

The Procurement Challenge: Balancing Cost, Risk, and Integration

The contractor faced a common procurement dilemma. The initial project specification listed premium European valve brands, placing the valve package 30-40% over budget. Sourcing from low-cost, unverified suppliers was not an option due to a previous project's negative experience with premature seat failures and inconsistent dimensions, which led to significant installation delays and unplanned maintenance. The core challenge was to identify a manufacturing partner that could provide a technically compliant, reliable valve solution while optimizing project costs.

Key Technical Requirement: The client intended to use their own standardized stock of pneumatic actuators. Therefore, a critical requirement was for the valves to be supplied as bare stem units with a precision-machined top flange strictly adhering to ISO 5211 dimensional standards to ensure seamless, direct-mount integration without the need for costly brackets or adaptors.

The JRVAL Solution: Foundry-Direct Manufacturing & Transparent Verification

We engaged with the client's engineering team not as a trader, but as the direct foundry and manufacturer. Our solution focused on providing verifiable data and engineering substance to mitigate their perceived risks.

Validated Material Integrity & Enhanced Durability

As a foundry-based manufacturer with over 20 years of casting expertise, we provided full material traceability. Each valve body, cast from ASTM A216 Grade WCB, was supplied with a standard EN 10204 3.1 Material Test Report (MTR). More importantly, our body castings feature a wall thickness that complies with the HG/T chemical industry standard, which is approximately 10-15% greater than the minimum API 609 requirement. This provides a quantifiable increase in the valve's pressure-retaining capability and corrosion allowance.

Guaranteed Dimensional Accuracy for Automation

To address the client's primary concern regarding actuator integration, we supplied detailed dimensional QC reports for each valve's ISO 5211 top flange. Measurements were taken using calibrated digital calipers and verified against the standard's tolerances. This pre-emptive quality assurance eliminated the risk of on-site installation issues, a key value proposition for the "bare stem" supply model.

Performance-Assured Sealing & Long-Term Reliability

Every valve underwent hydrostatic testing for both body (1.5x PN) and seat. The bi-directional seat test was conducted at 1.1x PN, confirming zero leakage (Rate A) as defined by API 598. Our commitment to long-term performance was further substantiated by a comprehensive 24-month warranty covering free replacement of spare parts, with post-warranty parts readily available due to our standardized manufacturing process.

Transparent Third-Party Verification Process

While our internal QC reports and MTRs were sufficient for this project, we were transparent about our policy: should the client require witnessed testing or validation by a specific third-party inspection agency (TPI) such as SGS, BV, or DNV, the service is available at the client's cost. This honesty built trust and provided the client with a clear path for enhanced verification if needed.

Quantifiable Results & Project Impact

By partnering directly with us, the EPC contractor successfully navigated their procurement challenges, achieving measurable improvements.

Cost Optimization: The final procurement cost was 22% lower than the quotation for the originally specified European brands, bringing the valve package comfortably within the project budget.
Risk Mitigation: After 18 months of continuous operation, there have been zero reported leaks or failures across all 80 installed valves, validating the material and design integrity.
Installation Efficiency: The guaranteed dimensional compliance of the ISO 5211 flange resulted in a 100% first-time fit rate with the client's actuators, reducing mechanical commissioning time.

"The challenge wasn't just finding a more affordable valve; it was finding one with verifiable material quality and dimensional accuracy. JRVAL's foundry-direct model gave us confidence. The MTRs were comprehensive, and the dimensional reports for the ISO top flange were spot-on. We've had zero maintenance calls on these valves in 18 months."

- Senior Mechanical Engineer Leading EPC Firm, Southeast Asia (Client name withheld for confidentiality)

QUALITY & COMPLIANCE CERTIFIED

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

Carbon Steel Wafer Type Butterfly Valve - Bare Stem

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Butterfly Valve Dimensions

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Bare SHAFT GOST Wafer Butterfly Valve: Technical FAQs

What are the benefits of specifying a bare shaft (bare shaft) valve?

A bare shaft valve offers maximum flexibility and cost-efficiency for projects with specific automation requirements. Key benefits include:

Actuator Flexibility: You can mount your preferred brand or type of actuator (pneumatic, electric), standardizing equipment across your facility and simplifying your maintenance inventory.
Cost Optimization: Sourcing valves and actuators separately can often lead to overall cost savings, especially when purchasing actuators in bulk for a large project.
Guaranteed Fit: Our bare shaft valves feature a top flange and stem connection manufactured in strict compliance with the ISO 5211 standard, ensuring seamless, direct-mount compatibility with any compliant actuator.

How do you ensure your Carbon Steel (WCB) castings are superior to the industry average?

As a foundry-based manufacturer, we don't just meet the minimum requirements; we optimize material chemistry for maximum performance. This is our core advantage:

Optimized Chemistry: For our ASTM A216 Grade WCB castings, we target the optimal range for key elements. We maintain tighter controls on carbon and manganese content than the standard requires, which improves weldability and mechanical strength.
Impurity Minimization: Our controlled foundry processes actively minimize detrimental impurities like sulfur and phosphorus, significantly reducing the risk of cracking and enhancing the valve body's toughness and long-term integrity.
Verifiable Quality: Every batch is accompanied by a full EN 10204 3.1 Material Test Report (MTR) detailing the exact chemical composition and mechanical properties, giving you verifiable proof of our superior quality.

How do your wafer valves ensure compatibility with GOST standard piping systems?

Our valves are specifically engineered to eliminate installation issues in GOST-compliant systems.

Flange Compatibility: The universal wafer body is designed to self-center and fit perfectly between flanges drilled to Russian GOST 12820 / 12821 standards for PN10 and PN16 pressure classes.
Face-to-Face Dimensions: All valves adhere to the strict face-to-face dimensional standards of API 609 Category A. This ensures they can serve as a direct replacement for other compliant valves without any need for pipe modification.

What does "bi-directional zero leakage" mean, and how is it verified?

"Bi-directional zero leakage" is a performance guarantee backed by rigorous, standardized testing. It confirms our valves provide a bubble-tight seal against pressure from either flow direction.

Verification Standard: Every valve we manufacture undergoes hydrostatic pressure testing according to the procedures outlined in the API 598 standard.
Performance Level: We test to achieve Rate A zero leakage, the most stringent classification under API 598, which permits no visible leakage through the seat during the test. A detailed pressure test report is generated for each valve.

What is your warranty policy, and how easy is it to source spare parts?

We support our products for their entire lifecycle to ensure your long-term operational success.

Warranty Period: We provide a comprehensive 24-month (2-year) warranty from the shipment date against any manufacturing defects. We will supply necessary replacement parts free of charge during this period.
Post-Warranty Support: Because our valves are built to international standards (API 609, ISO 5211), wear components like seats and seals are standardized, making them easy to source. We also maintain a stock of common spare parts to support our clients long after the warranty has expired.

Heavy-Body Series Carbon Steel Wafer Type Butterfly Valve - Bare Shaft

Product Advantages

Standards and Certifications

Specification of the Valve

Material of the Valve

THE INDUSTRY STANDARD FOR RELIABLE FLOW CONTROL

Foundry-Level Material Control

Precision CNC Machining

Proven, Reliable Design

ENGINEERED FOR ESSENTIAL INDUSTRIES

Municipal Water Supply

HVAC & Commercial Buildings

Fire Protection Systems

Food & Beverage (Utilities)

Pulp and Paper Industry

Power Generation

General Industrial Services

Mining & Dewatering

Agriculture & Irrigation

DESIGNED FOR DIVERSE OPERATING ENVIRONMENTS

Moderate Pressure Systems

Space-Constrained Installations

Automated Process Control

General Purpose Fluid Handling

Cost-Sensitive Projects

Quick Installation & Maintenance

MATERIAL SELECTION FOR MEDIA COMPATIBILITY

Neutral & Potable Water

Oils, Fuels, & Greases

Mildly Corrosive Chemicals

Seawater & Marine Environments

Higher Temperature Service

Abrasive Powders & Slurries

Case Study: Industrial HVAC System Upgrade

The Procurement Challenge: Balancing Cost, Risk, and Integration

The JRVAL Solution: Foundry-Direct Manufacturing & Transparent Verification

Validated Material Integrity & Enhanced Durability

Guaranteed Dimensional Accuracy for Automation

Performance-Assured Sealing & Long-Term Reliability

Transparent Third-Party Verification Process

Quantifiable Results & Project Impact

QUALITY & COMPLIANCE CERTIFIED

Carbon Steel Wafer Type Butterfly Valve - Bare Stem

Bare SHAFT GOST Wafer Butterfly Valve: Technical FAQs

What are the benefits of specifying a bare shaft (bare shaft) valve?

How do you ensure your Carbon Steel (WCB) castings are superior to the industry average?

How do your wafer valves ensure compatibility with GOST standard piping systems?

What does "bi-directional zero leakage" mean, and how is it verified?

What is your warranty policy, and how easy is it to source spare parts?