Superior Material Composition: Our valves are cast with chemical compositions at the highest end of international standards. For example, our ASTM A351 CF8 stainless steel contains 9% Nickel—the maximum allowable—to ensure superior corrosion resistance and extended service life.
Lug Hole Positional Accuracy: The true position of our threaded lug hole pattern is precisely controlled to an exacting tolerance of ±0.10 mm relative to the valve centerline.
100% Gauge Verification: To validate this precision, every valve's lug holes are 100% inspected with certified go/no-go gauges.
Premium raw steel finish with corrosion-resistant coating; deep-cast permanent markings for full traceability (material, pressure, heat number).
Design and Manufacture: ASME B16.34; ASME VIII; API 609:AS2129 JISB2220
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 |
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|---|---|
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Type of Connection |
Lug (NPT/ Through Hole Connection) |
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Actuation |
Electric |
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Size |
1 1/2in ~ 48in |
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Pressure |
10bar~20bar |
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Testing Pressure |
256psi |
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Medium |
Water, Oil, Gas, Steam, Corrosive Media, Slurry, etc. |
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Medium Temperature |
-25℃~180℃ |
MATERIAL OF THE VALVE |
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|---|---|
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Body |
WCB/ WCC/LCB/ LCC/ LC1 |
|
Disc |
DI/ CF8/ CF8M/ CF3/ CF3M/ 2205/ 2507/ 1.4529/ HC276/ C95400/ C95800 |
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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 |
|
Coating |
Epoxy Resin 200um ~ 250um |
Voltage Options: AC 220V, 380V; DC 24V
Frequency: 50Hz / 60Hz
Control Type: On/Off (Quarter-turn)
Modulating Input: 4-20mA / 0-10V DC
Current Draw: Varies by model (e.g., 0.2A ~ 2.5A)
Protection Class: Standard IP67 (NEMA 4/4X)
Optional Protection: IP68 (Submersible)
Housing Material: Die-cast Aluminum Alloy
Coating: Anti-corrosion Powder Coating
Ambient Temp: -20°C to +70°C (-4°F to +158°F)
Manual Override: Handwheel for Emergency Use
Position Indicator: Dome-type Visual Indicator
Limit Switches: 2x Open, 2x Close (Standard)
Torque Protection: Electronic Over-torque Cutoff
Optional Fail-Safe: Battery Backup Module
We integrate our decades of valve engineering expertise with advanced electric actuators to create robust automation solutions. Each assembly is built for high-temperature resilience, long-term reliability, and seamless control in demanding industrial environments.
Founded by a casting expert, we guarantee material integrity. We use PMI testing to verify alloys, ensuring every WCB carbon steel body strictly adheres to ASTM A216 standards for performance at elevated temperatures.
Our state-of-the-art CNC centers ensure every component's dimensions are machined to exact specifications. This precision is critical for perfect sealing, low torque, and the flawless operation of the valve assembly.
With two decades of field validation, our valve designs are not just theoretical; they are proven to be rational and reliable. This extensive experience means our products deliver consistent, trustworthy performance under pressure.
Our electric actuated carbon steel lug valves deliver superior performance and reliability in high-temperature, high-pressure, and challenging industrial processes where automation is key.
For non-critical utility lines such as service water, firewater, and cooling systems, our WCB valves provide a reliable, automated solution within the butterfly valve oil and gas industry, ensuring robust performance and easy integration.
In thermal power plants, managing auxiliary steam and cooling circuits is vital. Our electric high temperature butterfly valve is engineered from WCB carbon steel to reliably handle elevated temperatures for optimal plant efficiency.
For automated control of process fluids, solvents, and thermal oils, the robust WCB body of our carbon steel butterfly valve offers superior strength and compatibility, ensuring safe and precise plant operations.
In refinery utility applications, a dependable electric wcb butterfly valve provides automated isolation and control for cooling water, nitrogen lines, and process vents, enhancing operational safety and efficiency.
The strength of carbon steel is ideal for automated control of steam, black liquor, and process water lines. We supply a robust lug and wafer type butterfly valve to handle the demanding conditions of paper manufacturing.
Our electric actuated lug style butterfly valves, specified with high-temperature seats, provide precise modulation and tight shut-off for low-pressure steam distribution and condensate return lines in any industrial facility.
For engine room applications, including fuel oil service, lube oil, and high-temperature cooling systems, a carbon steel electric marine butterfly valve offers the required strength and fire-safe characteristics for safe vessel operation.
In district heating networks, our automated pn16 butterfly valve made from carbon steel is ideal for managing the flow of high-temperature hot water, ensuring reliable distribution and isolation within the system.
The quintessential intelligent industrial butterfly valve for modern factories. Use it on thermal oil circuits, process steam, and high-pressure air lines for precise, data-driven control integrated with your plant-wide SCADA system.
We pair our robust WCB carbon steel body with specialized disc and seat materials to provide reliable, automated control in chemically aggressive and high-temperature media.
For a leading geothermal energy producer, maintaining the integrity of their secondary steam loop is paramount for plant uptime and safety. They required an ultra-reliable, automated electric lug butterfly valve capable of withstanding high-cycle operation in a demanding thermal environment.
The Client: A Geothermal Power Plant Operator
The client operates a 50MW facility where saturated steam is used to drive turbines. The Plant Manager, Mr. Ivanov, faced recurring failures with their existing 12-inch (DN300) turbine bypass isolation valves. "The constant thermal cycling caused stem leakage and seat degradation," he explained. "We needed a valve engineered for this specific duty, not a generic product. We required a partner who could provide a complete, documented engineering solution, from casting to final assembly."
For this critical application, they needed a supplier who could prove the quality and rationale behind every component.
Surviving millions of cycles in a high-temperature, erosive environment.
The challenge was threefold: 1. **Thermal Fatigue:** The valve had to withstand frequent temperature swings from ambient to 180°C without loss of sealing or mechanical integrity. 2. **Erosion Resistance:** The low-quality saturated steam contained moisture droplets that could erode the disc and seat over time. 3. **Verifiable Quality:** The client demanded full material traceability and documentation for every critical manufacturing step to satisfy their stringent internal safety protocols.
We proposed an integrated solution built around our **Electric Actuated ASTM A216 WCB Carbon Steel Lug Butterfly Valve**, enhanced with a series of specified manufacturing and material treatments.
We began with raw ASTM A216 WCB steel, with a tightly controlled carbon content (0.22-0.25%) for an optimal balance of strength and ductility. After casting, every valve body underwent a crucial **normalizing heat treatment**. The castings were heated to 915°C (1680°F), held for 2 hours to ensure full austenitic transformation, and then air-cooled. This process refines the grain structure, relieves casting stresses, and significantly improves the material's toughness and resistance to thermal fatigue. A sample from each batch was sectioned for metallographic analysis, with reports provided to the client confirming a fine, uniform ferrite-pearlite microstructure.
Recognizing the importance of perfect alignment, we machined the valve's critical surfaces to exacting tolerances. The **lug thread holes were individually inspected with calibrated go/no-go gauges** to guarantee reliable bolt connections. The valve seat bore was machined to a concentricity of 0.05mm relative to the stem bore, ensuring even seat compression, which reduces torque and extends seat life dramatically under high-cycle conditions.
We engineered the valve's wetted parts specifically for this application. The stem was machined from **17-4PH stainless steel**, precipitation-hardened for maximum strength and resistance to stem twisting. The disc was cast in CF8M (316 SS), with the disc sealing edge receiving a **hard-facing of Stellite 6**, providing a tough, erosion-resistant surface against the wet steam. For the seat, we specified **RTFE (Reinforced Teflon)**, which offers the required temperature resistance of PTFE with enhanced resistance to deformation under pressure.
We paired the valve with a high-temperature rated electric actuator, capable of modulating control and providing diagnostic feedback. Crucially, each valve was marked with **deep-cast, permanent traceability numbers** (Material Heat No., Pressure Class, etc.), as requested in the client's specification. This provided a permanent record linking the physical valve to its material certificates and heat treatment reports, ensuring full accountability.
Our commitment to quality is verified by internationally recognized standards, providing the documentation and peace of mind you need for your critical industrial applications.
Engineered for your demanding application.
The key factor is temperature and pressure. Carbon Steel (ASTM A216 WCB) is the superior choice for industrial high-temperature and high-pressure service. It maintains its structural integrity at elevated temperatures where ductile iron would fail. It is the standard material for applications like steam, thermal oil, gas, and demanding chemical processes, while ductile iron is primarily used for water and general utility services at moderate temperatures.
We ensure quality through a strict, multi-stage process. First, we verify the raw material's chemical composition using PMI testing. More importantly, every WCB casting undergoes a crucial normalizing heat treatment. This process refines the grain structure, relieves internal stresses, and significantly improves the material's toughness and resistance to thermal fatigue. We provide full documentation, including Material Test Reports (MTR) and heat treatment curves, to guarantee compliance and performance.
The key benefit is its suitability for dead-end service. Each threaded lug hole allows the valve to be bolted to one flange while the other side of the pipeline is removed for maintenance. This isolates a section of the system without needing to drain the entire line. This feature is invaluable in industrial plants, refineries, and complex piping networks.
This is a smart, cost-effective engineering solution. The Carbon Steel body provides the required strength for high-pressure/temperature containment at a lower cost than a full stainless steel valve. The "wetted parts"—the disc and stem (e.g., SS316, CF8M)—are made of stainless steel to provide superior corrosion resistance against the process medium. This bimetallic construction offers the best of both worlds: strength and durability in a cost-efficient package.
Our electric valves support two primary control methods: On/Off (Quarter-turn), operated by simply applying power, and Modulating Control, which uses a standard 4-20mA or 0-10V analog signal for precise positioning. They are available in various standard voltages, including AC 220V, AC 380V, and DC 24V, allowing direct integration with modern PLC, DCS, or Building Automation Systems (BAS).
Each unit is a fully integrated assembly. Key features include a manual override handwheel for emergency operation, electronic over-torque protection to prevent motor damage, and a clear visual position indicator. For critical applications, we offer optional fail-safe modules (battery backup) that automatically drive the valve to a pre-set safe position (open or closed) upon power loss. The standard housing is IP67 rated, with IP68 available for submersible conditions.
As a source factory integrating casting, machining, and assembly, JRVAL's product reliability has been verified by the market for over 20 years.
Compare our products against other brands before you commit. We're confident you'll be satisfied after an in-depth investigation.
We provide a comprehensive 2-year warranty covering non-human damage. Spare parts for the valve body, disc, seat, and gear operator are readily available.
Before delivery, we provide complete documentation, including material test reports, heat treatment reports, and mechanical performance tests.
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Address: DaZhan Industrial Park, Xiaozhan Town, Jinnan District, Tianjin, China
Copyright @ 2025. Tianjin Jiangrui Steel Casting Co., Ltd.
Technical Support: Magic Lamp - Website
