Superior Corrosion Resistance (especially to seawater) and bi-directional zero-leakage sealing, ensuring exceptional longevity and high reliability in harsh marine and chemical environments.
100% Gauge Verification: To validate this precision, every valve's lug holes are 100% inspected with certified go/no-go gauges.
Purpose of Extended Stem: For insulated pipelines or below-deck/remote operation
Design & Manufacturing Standards: API 609, ASME B16.34, ASME Section VIII
Leakage Class: API 598 (Bi-directional Zero Leakage)
Side Flange Standards: ASME / ANSI: Class 125LB & 150LB; EN / DIN: PN6, PN10, PN16; BS / AS: BS 10 Table D/E, AS 2129 Table D/E; JIS: 5K, 10K (JIS B2220); GB / HG/T / GOST
Top Flange (Actuator Mounting) : ISO 5211; GB 90°
Face-to-Face Dimension Standards: API 609, ISO 5752, EN 558-1, ASME B16.10, MSS SP-68
Testing & Inspection Standards: API 598, EN 12266-1, ISO 5208, BS 6755-1
Certifications & Conformity: ISO 9001:2015; CE Marking (PED); SIL 3; EAC; BV
Technical description
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Q&A
Specification of the Valve |
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|---|---|
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Type of Connection |
Semi-Lug (Threaded Bolt Holes: Metric/UNC) |
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Actuation |
Bare Stem: With mounting flange per ISO 5211 Manual: Hand Lever, Worm Gearbox Automated: Pneumatic Actuator (Double Acting/Spring Return), Electric Actuator |
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Size |
NPS 1 ½" ~ 48" (DN40 ~ DN1200) |
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Pressure |
PN6 ~ PN20 / ANSI Class 125 ~ 150 |
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Testing Pressure |
Shell: 1.5 x Rated Pressure; Seat: 1.1 x Rated Pressure (acc. to API 598) |
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Medium |
Seawater, Brackish Water Also suitable for industrial cooling water, neutral liquids, and air |
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Medium Temperature |
-25℃~180℃ (-13°F to +356°F) Depends on seat material |
Material of the Valve |
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|---|---|
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Body |
Aluminum Bronze ( C95400/ C95800) |
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Disc |
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 |
High-Strength (Recommended): Monel K500, Duplex 2205, 17-4PH Standard Corrosion-Resistant: Aluminum Bronze C95400, SS316 |
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Soft Seat |
Elastomers: EPDM, HTEPDM, NBR (Nitrile Rubber / Buna-N), SIL (VMQ), FKM (VITON™), HYPALON™ Plastics: PTFE, PFA |
For over 20 years, JRVAL's reputation has been built on deep material expertise and precision engineering. We control the entire process from raw material casting to final assembly, ensuring every valve meets our exacting standards for seamless integration and automation.
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 etc. standards for optimal performance and longevity in automated systems.
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.
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 specifically for corrosive environments, our Marine Grade Aluminum Bronze Butterfly Valve provides unparalleled reliability where standard valves fail. Its robust construction and specialized materials make it the definitive choice for the most demanding marine and coastal applications.
In critical shipboard systems like ballast water, engine cooling, and fire mains, the superior corrosion resistance of our aluminum bronze valve is non-negotiable. Its inherent anti-biofouling properties reduce maintenance, making this robust semi lug butterfly valve the premier choice for ensuring operational reliability and longevity at sea.
Desalination plants process highly corrosive seawater and brine concentrate, demanding components with ultimate durability. Our valve's C95400 aluminum bronze body withstands chloride attack where lesser materials fail. The zero-leakage sealing of our semi lug butterfly valve is critical for maintaining pressure and efficiency in reverse osmosis (RO) systems.
Facilities along the coast rely on vast quantities of seawater for cooling, a service that relentlessly attacks standard valves. Our aluminum bronze valve provides an extremely reliable, low-maintenance solution for these critical intake and circulation lines. The design of this semi lug butterfly valve ensures consistent performance, minimizing the risk of costly shutdowns for repairs.
The unforgiving environment of an offshore platform demands components with uncompromising reliability. Used in firewater mains, cooling circuits, and seawater lift systems, our valve's robust construction resists constant salt spray and galvanic corrosion. This high-integrity semi lug butterfly valve provides the long-term, dependable service essential for safe and continuous offshore operations.
Our commitment to quality is verified by internationally recognized standards. We provide the corresponding documentation to prove it.
Client: PT Energi Maritim Nusantara (Fictional Name), a regional LNG operator in Indonesia.
Project: Seawater Intake & Cooling Loop Valve Replacement Project.
Challenge: Balancing long-term reliability and capital expenditure in a highly corrosive environment.
The client's LNG receiving terminal relies on a continuous flow of seawater for its vaporization process. The existing cast iron butterfly valves in the DN600 intake lines were suffering from accelerated graphitic corrosion and severe pitting from the warm, saline water. This led to leakage and seizure, forcing unplanned maintenance shutdowns every 12-18 months. Each shutdown represented not only significant labor costs but also production risks, making a reliable, long-term solution imperative.
The client’s engineering team, led by Lead Mechanical Engineer Mr. Adriansyah Bakri, sought a solution that went beyond simply replacing valves. They needed a partner who understood material science and could provide a robust, cost-effective solution. After a thorough technical evaluation, they chose our Aluminum Bronze Semi-Lug Butterfly Valves for the following reasons:
We recommended ASTM B148 C95800 Nickel-Aluminum Bronze, offering superior erosion and corrosion resistance in high-velocity seawater compared to standard bronze. The client's team audited our 81,426 m² facility, paying close attention to our in-house foundry where we control casting quality from the initial melt. This vertical integration, backed by our founder's 20-year casting expertise, provided them confidence in material integrity.
The "Bare Stem" was specified as an Extended Stem to accommodate 100mm pipe insulation while ensuring the worm gearbox remained accessible from the service platform. The Semi-Lug Body was critical for their maintenance strategy, allowing isolation and removal of downstream pumps and strainers without having to de-pressure the entire intake line.
Understanding the client's need for verifiable quality, we provided a comprehensive documentation package. This included our ISO 9001 and CE certifications, detailed dimensional inspection reports, and our standard Certificate of Conformance (CoC) with full material test reports (MTR) for the C95800 body/disc. At the client's specific request for this critical project, we arranged for and provided full EN 10204 3.1 Material Certificates, demonstrating our capability to meet stringent documentation requirements. This flexibility and transparency was a key decision factor.
The valves were installed and commissioned successfully. Post-installation monitoring over a 3-year period yielded significant, quantifiable improvements:
Our commitment extends beyond delivery. The project is covered by our standard 24-month warranty for free replacement of parts. Furthermore, as our valves are manufactured in strict accordance with international standards, the client has peace of mind knowing that standard spare parts will be readily available for the entirety of the valve's projected 15+ year service life. Our technical team remains available for online support, ensuring any operational queries are addressed promptly.
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While Duplex and 316L are excellent alloys, Aluminum Bronze (specifically C95800) offers a superior combination of resistance to chloride pitting, crevice corrosion, and biofouling in warm seawater. Its self-healing oxide layer prevents marine growth adhesion, significantly reducing maintenance and ensuring long-term, reliable performance where even high-grade steels can struggle.
The semi-lug design is critical for dead-end service. It allows your maintenance team to remove the downstream piping (e.g., to service a pump or filter) while the valve remains securely bolted to the upstream flange, holding back full system pressure. This drastically reduces downtime and increases operational safety during maintenance cycles.
Absolutely. The extended stem is a key feature, not an afterthought. You can specify the required "T-dimension" (centerline of valve to top of stem) to perfectly match your pipe insulation thickness or remote operation requirements. Our stems are robust, one-piece designs to ensure maximum torque transmission without weak points.
We provide a comprehensive 24-month warranty against manufacturing defects. Furthermore, all our valves and spare parts (seats, seals) are manufactured to international standards (e.g., API, ISO). This means you are not locked into a proprietary system. After the warranty period, you can source spares easily from us or qualified third-party suppliers, ensuring the long-term serviceability of your investment.
Yes. Our valves are designed and manufactured in strict accordance with international standards (e.g., API 609, ISO 5752) which form the technical basis for marine certification. As a vertically integrated factory, we can fully support and facilitate third-party witness testing and project-specific certification by any major classification society (DNV, ABS, LR, BV, etc.) to meet your exact requirements.
As a vertically integrated factory, we control quality from the source. Every heat number is fully traceable to its original raw material batch. Our standard documentation includes a Certificate of Conformance (CoC) and detailed material test reports (MTR). For projects with stringent documentation requirements, a full EN 10204 3.1 Material Certificate can be furnished upon request.
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Address: DaZhan Industrial Park, Xiaozhan Town, Jinnan District, Tianjin, China
Copyright @ 2025. Tianjin Jiangrui Steel Casting Co., Ltd.
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