Heavy-Body Series Carbon Steel Wafer Type Butterfly Valve - Pneumatic

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 ASTM A216 WCB steel, 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	Pneumatic
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

Actuator Type

Double Acting: Utilizes compressed air to power both the open and close strokes of the valve.

Single Acting / Spring-Return: Uses compressed air for one stroke and a mechanical spring for the return stroke, providing a fail-safe position.

- Normally Closed (NC) / Fail-Close: The spring closes the valve upon loss of air pressure.

- Normally Open (NO) / Fail-Open: The spring opens the valve upon loss of air pressure.

Control Type

On/Off (Discrete): For fully open or fully closed service, providing simple and reliable isolation.

Modulating (Throttling): For precise flow control by positioning the disc at any intermediate angle. Requires an electro-pneumatic positioner.

Special Configurations

Electro-magnetically Released: A specialized double-acting actuator designed for specific safety or emergency shutdown (ESD) applications.

Custom Solutions: Other actuator configurations and accessories are available upon request to meet unique application requirements.

ROBUST PNEUMATIC POWER FOR DEMANDING INDUSTRIAL CONTROL

We combine the strength of carbon steel wafer butterfly valves with powerful pneumatic actuators, delivering rapid, high-torque, and intrinsically safe solutions for heavy-duty industrial processes where speed and reliability are non-negotiable.

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..

China Pneumatic Butterfly Valve Suppliers

ENGINEERED FOR CORE INDUSTRIAL SECTORS

Our pneumatic carbon steel wafer butterfly valves provide a cost-effective and durable solution for a wide range of general and heavy-duty industrial applications.

Oil & Gas Processing

In midstream facilities for controlling utility lines like cooling water and process air, an intrinsically safe pneumatic Api 609 butterfly valve provides the required safety and reliable performance in potentially hazardous environments.

Chemical Manufacturing

For non-corrosive chemical transfer and utility services, a robust industrial butterfly valve with pneumatic actuation ensures fast-acting isolation and control, enhancing plant safety and operational efficiency where compressed air is readily available.

Power Generation Plants

In cooling water intake systems and circulation lines, a large diameter butterfly valve driven by a high-torque pneumatic actuator offers a powerful and cost-effective solution for managing high-volume water flow with proven reliability.

Pulp & Paper Mills

The powerful action of a pneumatic actuator makes our butterfly valve for slurry application ideal for handling pulp stock, white water, and chemical additive lines, cutting through viscous media to ensure reliable shut-off and control.

Mining & Mineral Processing

For dewatering and tailings management, a heavy-duty rubber lined butterfly valve provides superior abrasion resistance, while the pneumatic actuator delivers the high torque needed to operate reliably in harsh, demanding mining conditions.

Municipal Water & Wastewater

In treatment plants and pumping stations, an epoxy-coated carbon steel Awwa butterfly valve with a pneumatic actuator offers a durable and economical solution for automated isolation on aeration lines, backwash systems, and chemical feeds.

Bulk Material Handling

At the base of silos and hoppers for controlling the flow of powders and granules, the quick action of a pneumatic wafer butterfly valve provides efficient and precise on/off control, integrating perfectly into automated conveying systems.

Steel Manufacturing

In steel mills for controlling cooling water circuits to furnaces and rolling mills, a carbon steel high temp butterfly valve fitted with a pneumatic actuator ensures dependable operation in hot, demanding industrial environments.

General Manufacturing Facilities

For plant-wide utilities such as compressed air distribution, process water, and cooling systems, a standard PN10 butterfly valve offers a reliable and easily automated solution for sectional isolation and flow management.

BUILT FOR CHALLENGING OPERATING CONDITIONS

Designed to perform where other actuators falter, our pneumatic valves thrive in environments demanding power, speed, and safety.

High-Cycle Automation

Perfect for batching systems and rapid cycling processes where tens of thousands of operations are required annually. The simple design of a pneumatic actuated butterfly valve ensures a long service life with minimal maintenance.

Hazardous & Explosive Areas

The absence of electrical wiring makes our pneumatic wafer valve intrinsically safe for ATEX-rated zones in chemical plants, refineries, and mining operations, preventing potential ignition sources and ensuring maximum site safety.

High Pressure & Viscous Media

The high thrust generated by pneumatic actuators easily overcomes high pressure differentials and thick media. Our class 150 butterfly valve assembly provides reliable shut-off where electric actuators might struggle or require oversizing.

Fail-Safe Systems

When equipped with a spring-return actuator, the valve automatically moves to a pre-set safe position (open or closed) upon loss of air pressure, making the butterfly valve assembly perfect for critical emergency shutdown (ESD) applications.

Cost-Effective Automation

For facilities with an existing compressed air network, a pneumatic wcb wafer butterfly valve is often the most economical choice for automation, offering a lower initial purchase price compared to equivalent electric actuated valves.

Space-Constrained Installations

The compact design of a wafer style butterfly valve, combined with a relatively small pneumatic actuator, provides a high-torque solution that fits into tight pipe racks and machinery skids where larger, bulkier actuators cannot.

MATERIAL SPECIFICATIONS FOR INDUSTRIAL FLUIDS

Pairing a robust carbon steel body with the right seat material ensures reliable sealing and long service life across various industrial media.

General Water & Air Services

For utility applications like process water, cooling loops, and compressed air, an epdm lined butterfly valve offers an excellent, cost-effective seal, providing reliable bubble-tight shut-off for non-corrosive media.

Oils, Fuels & Hydrocarbons

When handling petroleum products, hydraulic fluids, and lubricants, specifying a butterfly valve nbr seat is critical. The NBR (Nitrile) elastomer resists swelling and degradation when exposed to hydrocarbons.

Elevated Temperature Media

For applications involving hot water, low-pressure steam, or process fluids up to 150°C, a butterfly valve viton seat provides superior temperature resistance and maintains a reliable seal where EPDM or NBR would fail.

Aggressive Chemical Service

For highly corrosive media, a carbon steel body can be used with a ptfe lined butterfly valve configuration. The thick, inert liner isolates the valve body from the fluid, providing a cost-effective alternative to exotic alloy valves.

Food Grade Applications (Non-Acidic)

For handling utility lines or non-acidic food products like vegetable oils, a butterfly valve seat epdm that is FDA-compliant provides a safe and sanitary sealing surface, ensuring product purity in processing plants.

Seawater Ballast Systems

In marine applications, a china wafer type butterfly valve with a bronze or duplex stainless steel disc and a durable rubber seat offers a robust and economical solution for controlling the flow of seawater in ballast and cooling systems.

Enhancing Plant Reliability and Optimizing MRO Budgets in Pulp & Paper Manufacturing

This case study details how a major pulp and paper facility in Southeast Asia partnered with JRVAL to overcome challenges with inconsistent valve performance on their utility lines, achieving significant cost optimization and operational stability.

Contact Person: Mr. David Chen, Lead Mechanical Engineer.
Application: Plant-wide utility services, including process water, compressed air distribution, and chemical additive lines (non-corrosive).
Product: DN150 - DN600 Pneumatic Actuated Carbon Steel Wafer Butterfly Valves (EPDM Seat).

The Challenge: Mitigating Risk Beyond Price Point

Mr. Chen's team was facing a persistent maintenance challenge. While their critical process lines were equipped with premium European valves, the MRO (Maintenance, Repair, and Operations) budget for essential utility lines was under constant pressure. Attempts to source lower-cost valves from regional suppliers had resulted in inconsistent quality, specifically premature seal failure and casting defects, leading to minor leaks and two unplanned shutdowns in the previous fiscal year. Their goal was to find a supplier that could offer a balance between cost-effectiveness and verifiable, long-term reliability, moving beyond the market extremes of high-cost brands and high-risk unknown factories.

The JRVAL Solution: Transparency, Engineering, and Control

Instead of a simple quote, we engaged with Mr. Chen's engineering team to understand their past failures and verification requirements. Our solution was built on four key pillars:

1. Verifiable Material Integrity via In-House Foundry Control

Addressing their primary concern about material quality, we highlighted our foundational strength: our 81,426 m² facility includes an in-house foundry managed by our founder, a 20-year casting expert. We provided Material Test Reports (MTRs) for our ASTM A216 WCB carbon steel, demonstrating a chemical composition consistently in the optimal range of the standard. This vertical integration guaranteed material traceability and quality control from raw material to finished product, a crucial differentiator from suppliers who merely assemble externally sourced components.

2. Robust Engineering for Extended Service Life

The valves supplied featured our thick-wall body design, compliant with HG/T industry standards, providing superior structural rigidity and pressure containment. The pneumatic actuators were sized to provide a 30% safety torque margin, ensuring reliable operation even with minor fluctuations in air pressure or media consistency. Our proprietary seat design achieves bi-directional zero-leakage (meeting API 598 Rate A), a feature we engineer through structural innovation rather than costly material add-ons, extending the valve's reliable service life.

3. Transparent & Comprehensive Quality Assurance

We were transparent about our QA process. While we hold ISO 9001, CE, and BV certifications, we understood the client's need for project-specific validation. Each valve was supplied with a complete documentation package, including MTRs, dimensional inspection reports (generated using calibrated metrology tools), and our in-house hydrostatic and pneumatic test certificates (1.5x body, 1.1x seat pressure). We also openly facilitated and welcomed the client's option to contract a third-party inspector (like SGS or Bureau Veritas) to witness the final tests at our facility at their own cost, demonstrating full confidence in our processes.

4. Dependable Supply Chain & After-Sales Support

With 11 key CNC machining centers and controlled casting production, we committed to and met a 6-week delivery schedule for the bulk order, significantly shorter than the 14+ weeks quoted by their European suppliers. Furthermore, we provided a comprehensive 24-month warranty covering free replacement of spare parts. Because our valves adhere strictly to international standards, we also assured the client that even post-warranty, sourcing compatible seals or components would be straightforward, ensuring low Total Cost of Ownership (TCO).

Quantifiable Results & KPIs

The partnership delivered measurable improvements to the plant's operations and budget:

22% Cost Reduction: Achieved a 22% reduction in valve procurement costs for the specified utility lines compared to their previous European supplier, freeing up significant MRO budget.
100% On-Time Delivery: The entire project order was delivered within the committed 6-week timeframe, preventing any delays in their planned maintenance schedule.
Zero Valve-Related Downtime: In the 18 months following installation, the facility has reported zero unplanned shutdowns or maintenance interventions related to the performance of JRVAL's pneumatic butterfly valves.

"JRVAL's team focused on providing the engineering data and material traceability we needed. The vertical integration with their own foundry was the key differentiator that gave us confidence. The valves have performed reliably, and the cost savings are tangible. They delivered a cost-optimized, low-risk solution, not just a low-priced product."

Mr. David Chen Lead Mechanical Engineer, Pulp & Paper Facility, Thailand

QUALITY & COMPLIANCE CERTIFIED

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

Stainless Steel Lug Type Butterfly Valve - Pneumatic

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Butterfly Valve Dimensions

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Pneumatic Carbon Steel Wafer Butterfly Valve: Technical FAQs

What are the key specifications and fail-safe options for your pneumatic actuators?

Our pneumatic actuators are engineered for robust performance and seamless integration into industrial control systems.

Actuator Types: We offer both Double-Acting (air-to-open, air-to-close) and Spring-Return (Single-Acting) configurations to suit your operational and safety requirements.
Fail-Safe Capability: Spring-return actuators provide reliable fail-safe operation, automatically moving the valve to a pre-set 'fail-open' or 'fail-close' position upon loss of compressed air supply.
Standardized Interfaces: Actuators feature an ISO 5211 mounting flange and a NAMUR VDI/VDE 3845 interface for solenoid valves, ensuring full interchangeability and easy accessory mounting.

How do you guarantee the quality of the ASTM A216 WCB carbon steel?

As a foundry-direct manufacturer founded by a 20-year casting expert, we provide unparalleled control over metallurgy and material integrity.

In-House Foundry Control: We manage the entire casting process for our WCB bodies and discs, ensuring strict adherence to ASTM standards for chemical composition and mechanical properties, not just relying on supplier certificates.
Full Traceability: Every valve is supplied with a comprehensive documentation package, including a Material Test Report and our internal QC dimensional reports, linking the product to its specific material heat number.
Verification Transparency: While we provide complete in-house test reports, we fully support clients who wish to contract an independent third-party inspector (e.g., SGS, BV) to witness final testing at our facility.

What are the pressure and temperature limitations for this valve?

The valve's operating range is determined by its pressure class and selected seat material, designed to meet common industrial requirements.

Pressure Rating: The valve body is designed for ASME Class 150 / PN16 service, suitable for a wide range of general industrial fluid handling applications.
Temperature by Seat Material: The operational temperature is dependent on the elastomer seat:
- EPDM: -30°C to 120°C (-22°F to 248°F) - Excellent for water, air, and glycols.
- NBR (Nitrile): -20°C to 80°C (-4°F to 176°F) - Ideal for oils, fuels, and hydrocarbons.
- VITON (FKM): -20°C to 150°C (-4°F to 302°F) - For higher temperatures and some chemical services.

Your product features "zero leakage." Which industry standard verifies this claim?

Our zero leakage claim is a performance guarantee verified against stringent international testing standards, not a marketing term.

Test Standard Compliance: Every valve undergoes hydrostatic and pneumatic testing according to API 598 procedures (1.5x shell, 1.1x seat pressure).
Performance Specification: We guarantee API 598 Rate A zero leakage for our resilient-seated valves. This signifies a bubble-tight, bi-directional seal with no visible leakage under test conditions.
Dimensional Integrity: The valve's face-to-face dimension conforms to API 609 Category A, ensuring it is a direct, problem-free replacement for other compliant valves in your system.

What is your warranty policy and approach to long-term serviceability?

We provide a clear support framework designed to optimize your Total Cost of Ownership (TCO).

Comprehensive 24-Month Warranty: All JRVAL valves and actuators are covered by a 2-year warranty against manufacturing defects. During this period, we provide free replacement for any faulty parts and offer lifetime online technical support.
Optimized for MRO: Our valves are built to international standards. This ensures that common wear items like seats and seals are easily serviceable and can be sourced cost-effectively from us or qualified suppliers long after the warranty, guaranteeing a low TCO.