Precision-Machined Locating Notches: The valve body is engineered with integral locating notches for rapid and accurate alignment with flange bolts, ensuring a simplified and error-free installation.
Robust High-Pressure Body: Built with an extra-thick, high-grade ductile iron body, this valve surpasses Heavy-Body Series standards and is reliably rated for high-pressure applications up to PN25.
Guaranteed Material Integrity: We guarantee an optimized composition for our EN 1563 Grade EN-GJS-500-7 ductile iron. We utilize the beneficial upper range of key elements like Manganese for superior strength, while strictly controlling harmful impurities like Phosphorus and Sulfur to levels far below the industry norm.
Design and Manufacture: ASME B16.34; ASME VIII; API 609; AWWA
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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|---|---|
|
Type of Connection |
Wafer |
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Actuation |
Bare Stem: With mounting flange per ISO 5211 |
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Size |
1.5in ~ 48in (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 |
Water, Oil, Gas, Steam, Slurries, and various Corrosive Media |
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Medium Temperature |
-25°C to +180°C (-13°F to +356°F) Dependent on seat material |
Material of the Valve |
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|---|---|
|
Body |
• Ductile Iron: GGG50/ GGG40 |
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Disc |
• Ductile Iron (Nickel-Plated): ASTM A536 65-45-12 + Ni • Duplex, Bronze & Special Alloys: CD3MN (Duplex 2205), CE3MN (Super Duplex 2507), Aluminum Bronze (C95400/C95800), CW6MC (Hastelloy C-276 eq.) |
| Shaft |
• Carbon Steel: AISI 1045 • High-Strength & Corrosion Resistant: 17-4PH (SS630), Duplex 2205 (S32205), Super Duplex 2507 (S32750), Monel K500, Hastelloy C-276 |
|
Soft Seat |
• Elastomers: EPDM, NBR (Buna-N) • High-Performance Elastomers: FKM (Viton™), Silicone (VMQ), CSM (Hypalon™) |
| Coating |
• System: Fusion Bonded Epoxy (FBE) |
The HP25™ series is built on a foundation of superior material strength and precision manufacturing. Featuring a high-grade GGG50 ductile iron body, these valves provide the robustness and safety factor required for demanding, high-pressure systems where standard cast iron is not an option.
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.
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.
The superior strength and pressure rating of the HP25™ ductile iron butterfly valve make it the definitive choice for critical services where the performance of standard cast iron is insufficient.
In tall buildings, HVAC systems require valves that can handle high static pressure in vertical risers. The robust body of our Ggg50 Butterfly Valve ensures long-term, leak-free integrity against constant pressure and system fluctuations.
Essential for main water lines where pressure surges and water hammer are risks. The superior ductility and tensile strength of a Ductile Cast Iron Butterfly Valve prevent body fracture, ensuring the safety and reliability of public water supplies.
High pressure is fundamental to reverse osmosis. The heavy-duty Di Butterfly Valve is essential for handling high-pressure seawater, brine, and permeate streams, providing reliable service in highly corrosive and demanding plant environments.
For controlling abrasive slurry lines under significant head pressure, toughness is paramount. The resilient body of the Di Butterfly offers excellent resistance to both the high internal pressures and the erosive nature of mineral tailings.
In engine cooling and ballast systems, valves must endure constant vibration and pressure. While this is a wafer design, we manufacture it with the same certified materials as a full Ductile Lug valve, guaranteeing maritime safety and performance.
Specified for cooling water intake systems and auxiliary process lines where reliability is non-negotiable. As a premier China Ductile Iron Butterfly Valve manufacturer, we provide certified materials that meet the power sector's stringent quality and safety standards.
In high-pressure fire suppression mains, valve failure is not an option. Global EPCs trust China Ductile Iron Butterfly Valve Suppliers like us who provide UL/FM approved or certified high-strength valves for these critical life-safety applications.
While the HP25 excels at PN25, we also supply the reliable Ggg40 Butterfly Valve for medium-pressure district heating loops, offering a cost-effective yet robust solution for temperature and flow regulation across large urban areas.
In large-scale filtration, backwash, and chemical dosing systems, a strong valve is key. A Butterfly Valve Ggg40 offers a significant upgrade over cast iron, providing the durability needed for high-volume, 24/7 industrial water processing.
The HP25™ is engineered to thrive in conditions where mechanical stress, high pressure, and installation precision are paramount concerns for engineers and operators.
Perfect for pump discharge lines where the valve is under constant, significant stress. The ductile cast iron butterfly valve construction resists fatigue and pressure pulsations, ensuring long-term operational safety.
Where rapid valve closures can create intense pressure spikes, the superior tensile strength of our ggg50 butterfly valve provides a crucial safety margin against the catastrophic failure seen in brittle cast iron valves.
In buried service, the valve must withstand soil loads and ground settlement. The robust body of the di butterfly valve resists external deformation and stress, ensuring integrity in inaccessible locations for decades.
The CNC-machined locating notches are a key advantage in complex piping. This feature on our china ductile iron butterfly valve guarantees perfect alignment, preventing gasket failures and reducing costly installation labor.
For major waterworks projects, contractors need reliable partners. As one of the leading china ductile iron butterfly valve suppliers, we provide valves up to DN1200 with certified strength for critical national infrastructure.
Installed near large pumps or generators, the sheer mass and rigidity of our heavy-body di butterfly provides excellent stability, resisting vibration that can cause premature seat wear and connection leaks in lesser valves.
How a switch to JRVAL's HP25™ Ductile Iron Valves mitigated project risk and secured budget compliance for a critical infrastructure project in Muscat.
A mid-sized Omani engineering contractor secured a contract for a new district cooling plant in Muscat. The project specifications required PN25 rated ductile iron butterfly valves (DN200-DN600) for the primary chilled water loop, designed to operate continuously at 16-18 bar.
The contractor faced a critical procurement dilemma. Quotes from established European brands were 22% over their allocated budget for the valve package. Conversely, lower-cost alternatives lacked verifiable material traceability, posing a significant risk of receiving valves made from inferior GGG40 or even grey cast iron, which would not safely withstand the system's design pressure and potential hydraulic shocks. The project was stalled between unacceptable cost and unacceptable risk.
Instead of simply submitting a low bid, our team engaged with the contractor's engineers. Our solution focused on demonstrating verifiable quality and de-risking the procurement process:
We highlighted our core strength: being a source manufacturer with an 81,426 m² facility and our own foundry, managed by a 20-year casting expert. We provided EN 10204 3.1 Material Test Reports (MTRs) for our EN-GJS-500-7 (GGG50) castings, demonstrating consistent chemical composition and mechanical properties that meet and exceed the standard. This addressed their primary concern about material integrity at the source.
Our technical submittal included detailed dimensional drawings from our 11 CNC machining centers, hydro-static test procedures (to 1.5x shell, 1.1x seat pressure per EN 12266-1), and our internal QC inspection reports. Crucially, we stated our full support for the client to appoint a third-party inspector (TPI) like SGS or Bureau Veritas to witness production and testing at their discretion.
We provided a clear 24-month warranty period covering free replacement of parts. We also confirmed that our valve design adheres to international standards, ensuring that post-warranty, non-proprietary components like seals could be sourced from other qualified suppliers if needed, thus lowering the long-term Total Cost of Ownership (TCO).
Our final pricing enabled the contractor to achieve an 18% cost saving on the valve package compared to the original European quotes, bringing the procurement well within their revised budget without compromising on the PN25 specification.
Leveraging our in-house production control, the entire order of 120 valves was manufactured, tested, and shipped within 8 weeks, arriving on-site 2 weeks ahead of the contractor's required date, which mitigated any risk of installation delays.
All 120 valves successfully passed on-site pressure testing witnessed by the contractor's QA/QC team, achieving zero leakage (Rate A) according to the ISO 5208 standard. The valves have been in continuous operation for 18 months with no reported issues.
Our commitment to quality is verified by internationally recognized standards. We provide the documentation to prove it.
Ready for actuator integration in your project?
Our HP25™ valve's reliability stems from superior material control and robust design. As a foundry-direct manufacturer, we ensure:
Our "zero leakage" claim is not a marketing term; it is a technical specification. All our soft-seated butterfly valves are tested to achieve Rate A leakage as defined by the ISO 5208 and EN 12266-1 standards. This means no visible leakage is detected during the hydrostatic seat test, ensuring bubble-tight shutoff in your application.
The HP25™ wafer body features CNC-machined locating notches. These notches ensure rapid and precise alignment between pipe flanges during installation. This design feature significantly reduces labor time and, more importantly, prevents gasket damage and potential leaks caused by misalignment, a common issue with standard wafer valves.
Our standard coating is a high-performance Fusion Bonded Epoxy (FBE) applied to both internal and external surfaces. We ensure a consistent Dry Film Thickness (DFT) of 200-250 microns. This system provides excellent corrosion resistance and adhesion, far superior to basic liquid paint, ensuring long-term protection even in moderately corrosive or humid environments.
We provide a 24-month warranty against manufacturing defects. After the warranty period, because our valves are designed to international standards, common spare parts like seats and O-rings are not proprietary. This gives you the flexibility to source replacements from us or other qualified suppliers, preventing vendor lock-in and ensuring long-term serviceability.
As a foundry-direct manufacturer, we control ductile iron quality from melt to casting, ensuring superior strength and documented material integrity
With 11 CNC centers, we guarantee every dimension, from the ISO 5211 top flange to the flange alignment notches, is machined for precision and reliability.
Every shipment is backed by a full documentation package—including MTR and pressure test reports (ISO 5208 Rate A)—providing the verifiable proof of quality you need.
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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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