Material Traceability: Full material certs and third-party reports ensure material authenticity
Pinless Design: Pinless stem/disc connection eliminates pin failure risks, ensuring reliable high-torque performance.
Design and Manufacture: API 609 Category B / EN 593 / ASME B16.34
Leakage Class: Standard: Zero Leakage (Bi-directional) per API 598 / ISO 5208 Rate A ; Optional: FCI 70-2 Class V / VI
Flange Connection: ASME B16.5 / B16.47 (Class 150 – 2500); EN 1092-1 (PN10 – PN400); Others: JIS B2220, AS 2129, GOST, HG/T available upon request.
Top Flange (Actuator Mounting): ISO 5211
Face-to-Face Dimension: API 609 / ISO 5752 / EN 558 Series / ASME B16.10
Testing & Inspection: API 598 / ISO 5208 / EN 12266-1
Certifications: ISO 9001, CE/PED, API 609 (Monogram), EAC, SIL 3
Technical description
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Q&A
Specification of Flange Type Valve |
|
|---|---|
| Type of Connection |
Double Flanged Ends (Also available in Wafer and Lug types) |
| Actuation | • Bare Stem: With mounting flange per ISO 5211 • Manual: Hand Lever, Worm Gearbox • Automated: Pneumatic Actuator (Double Acting/Spring Return), Electric Actuator |
| Size |
NPS 1½" – 112" (DN40 – DN2800) Larger sizes available upon request. |
| Pressure |
ASME Class 150 – 2500 (PN10 – PN400) |
| Testing Pressure | Per API 598 / ISO 5208 (Zero Leakage for Laminated Seal) |
| Medium | Corrosive Chemicals, Pharmaceutical, Food & Beverage, Cryogenic Fluids (LNG/LOX), High Temp Steam, Natural Gas. |
| Medium temperature |
-196℃~800℃ (-320°F to +1472°F) Material Dependent |
Material of the Valve |
|
|---|---|
| Body | Austenitic Stainless Steel: ASTM A351 CF8 (304), CF8M (316), CF3 (304L), CF3M (316L) Duplex & Super Duplex: ASTM A995 4A (2205), 5A (2507), 6A Super Austenitic / Special Alloy: ASTM A351 CK3MCuN (1.4529 / 6Mo), CN7M (Alloy 20), Monel, Hastelloy, Inconel (Note: Carbon Steel options available upon request) |
| Disc | Stainless Steel: ASTM A351 CF8, CF8M, CF3, CF3M Duplex SS: ASTM A995 4A (2205), 5A (2507) High Alloy: 1.4529, Hastelloy C276, Monel 400, Al-Bronze C95800 |
| Stem | Precipitation-Hardening SS (Standard): 17-4PH (ASTM A564 Gr.630) Nitronic Alloy: XM-19 (Nitronic 50) Duplex SS: F51 (2205), F55 (2507) Nickel Alloy: Inconel 718, Monel K500 (Note: We do not recommend Carbon Steel stems for Stainless Steel valves) |
| Body Seat | Stellite® Hardfaced: Stellite 6 / Stellite 21 overlay on integral seat (Wear & Corrosion Resistant). Solid Seat: Integral SS seat (For specific mild service). |
| Disc Seal Ring | Laminated Seal (Standard): SS316 + Graphite / Duplex + Graphite / Inconel + Graphite (Ensures Fire-Safe and Zero-Leakage performance) Solid Metal: Homogeneous metal ring for extreme abrasion or temperature. |
Our Triple Offset Flanged Butterfly Valves are engineered for critical service across a wide range of industries where zero-leakage and high performance are non-negotiable.
As an API 609 category butterfly valve, it provides bi-directional, zero-leakage shutoff in refining processes. The tricentric triple offset butterfly valve design excels in high-temperature catalytic cracking and hydrocarbon processing.
Our cryogenic triple offset butterfly valve is specifically designed for LNG storage and transportation. An extended bonnet and specialized materials ensure reliable performance and bubble-tight sealing down to -196°C.
The robust metal-to-metal seal on our high temperature butterfly valve makes it ideal for main steam isolation, turbine bypass, and geothermal steam applications, withstanding extreme thermal cycles.
In desalination and water treatment, this triple eccentric valve, often specified in Super Duplex, offers superior corrosion resistance. It serves as a reliable water butterfly valve for both isolation and control.
As a leading China stainless steel butterfly valve factory, we offer valves in a range of alloys (e.g., Hastelloy, Inconel) to handle corrosive media, ensuring plant safety and longevity with zero leakage.
The unique camming action of the butterfly valve eccentric type lifts the seal away from the seat, preventing wear in abrasive services like pulp & paper effluent or mining slurry, making it a superior butterfly valve for slurry application.
"We replaced the failing valves on our main reverse osmosis intake line with JRVAL's super duplex triple offset valves. The result? 18 months of continuous operation, zero pressure drop, zero leakage. This isn't just a valve; it's plant reliability."
JRVAL is the source factory for the production of steel butterfly valves, integrating casting, precision machining, and assembly under one roof. With 20 years of market-proven performance, our reliability is a fact, not a promise. Our origins in casting ensure we control material integrity and machining precision from start to finish, guaranteeing every valve meets the highest standards.
Our commitment to quality is validated by internationally recognized certifications.
In-house advanced CNC machining centers ensure every component is manufactured with unparalleled precision for flawless performance.
Ready to configure for your project?
Find answers to common questions about our Triple Offset Butterfly Valves, their design, and performance advantages.
As a source factory controlling the entire production chain, we provide full material traceability. Every valve is supplied with Material Test Reports (MTRs) to EN 10204 3.1, and we can provide Positive Material Identification (PMI) and other third-party inspection reports upon request to ensure authenticity.
Traditional pinned connections are a common failure point under high torque or vibration. Our pinless design creates a solid, high-strength connection between the stem and disc. This eliminates the risk of pin failure, ensures reliable torque transmission, and significantly enhances the valve's long-term operational safety and reliability.
Yes. Both the body seat and the laminated disc seal ring are fully replaceable on-site. This feature is crucial for minimizing operational downtime and reducing total cost of ownership. It allows for quick, cost-effective maintenance without the need for off-site repairs or full valve replacement, extending the valve's service life indefinitely.
The triple offset geometry creates a unique cam-like action that moves the disc seal off the body seat almost instantly. This eliminates friction and wear during opening and closing, which is the key to achieving a durable, repeatable, bi-directional zero-leakage seal (ISO 5208 Rate A) even in high-cycle, high-pressure, and high-temperature services.
Yes, but with specialized configurations. Our core triple offset design is the foundation. For high temperatures (up to 800°C), we use specific alloys and laminated graphite seals. For cryogenic services (down to -196°C), we use austenitic stainless steels, a cryogenic extended bonnet to protect the packing, and materials proven for low-temperature toughness.
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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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