Double Offset Butterfly Valves
High-performance double-eccentric valves engineered with dual shaft offsets providing a smooth camming action. Significantly minimizes seat friction during rotation, ensures zero-leakage bi-directional shut-off, and extends valve operational lifespan under rigorous thermal and pressure cycling.
Advanced Dual-Eccentric Camming Action & Ultra-Low Torque Sealing
ENGIPRO SOLUTIONS LLP is a premier manufacturer and supplier of Double Offset Butterfly Valves in India, delivering precision-engineered valve solutions for critical industrial pipelines. Built with advanced double offset geometry, these valves provide exceptional sealing performance, drastically reduced seat wear, and smooth, low-torque actuation even across demanding temperature and pressure fluctuations.
The double eccentric shaft orientation allows the disc to cam cleanly off the seat within just a few degrees of opening, eliminating rubbing and galling along the circumference. Designed for extended operational durability, ENGIPRO Double Offset Butterfly Valves ensure reliable bi-directional shut-off, high flow capacity with minimal pressure drop, and negligible maintenance overhead in heavy-duty utility and process networks.
Trusted in oil and gas refineries, petrochemical complexes, thermal power stations, chemical processing, and marine piping, our valves are certified to API 609 Category B, EN 593, and API 598 standards. Available with manual lever, precision worm gearbox, pneumatic actuators, and electric motor drives for reliable automated plant control.
Special Features & Technical Construction
Engineered in compliance with API 609 Category B and ISO 5752, featuring precision dual-offset geometry for harsh service.
Double Eccentric Camming
Shaft offset from seat plane and pipe centerline allows the disc to lift away from the seat instantly upon rotation, eliminating seat scuffing.
Blowout-Proof Shaft
Internally retained blowout-proof stem engineered with high-strength anti-extrusion collars, compliant with international pressure vessel codes.
Short & Long Pattern Options
Offered in both Short-pattern and Long-pattern face-to-face dimensions conforming to API 609, ISO 5752, and BS EN 593 standards.
Ultra-Low Operating Torque
Reduced seating friction lowers torque demands substantially, allowing the selection of smaller, cost-effective actuators and gear operators.
10,000 Cycle Tested
Rigorous design validation testing confirms flawless seal integrity, structural reliability, and bubble-tight isolation past 10,000 endurance cycles.
Advanced Polymer & Elastomers
High-grade seat options including Virgin PTFE, RPTFE, Black/White Nitrile, EPDM, Viton, and high-purity Silicon for chemical versatility.
Fire-Safe Certified
Fire-safe tested design adhering to API 607 / ISO 10497 featuring secondary metal-to-metal sealing if soft seating burns out during fire exposure.
ISO 5211 Direct Mounting
Standardized ISO 5211 actuator mounting flange facilitates direct installation of pneumatic actuators, electric actuators, or gearboxes without brackets.
Technical Specifications
Engineered to global standards for high-performance butterfly valves across API, ASME, BS, and EN benchmarks.
Technical Details & Operational Standards
| Design Standards | EN 593 and API 609 Cat A & B |
| Special Features | The design complies with API 609 • Blowout-proof Shaft • Range of Short-pattern and Long-pattern valves • Tight sealing and low operating torque • Design Validation Test completed 10,000 cycles • High performance seals (PTFE / RPTFE / Elastomers) • Fire-Safe Design for Offset Valves • Actuator mounting pads to ISO 5211 |
| End Flanges Compatibility | ASME B16.5, AWWA, EN 1092-1 |
| Face to Face Dimensions | API 609, ISO 5752, BS EN 593 |
| Testing Standard | API 598 / ISO 5208 (Zero Leakage) |
| End Connections | Wafer, Lugged Raised Face, Double Flanged (ASME B16.5, EN 1092-1) |
| Sizes Range |
CAT A: DN 40 to DN 1200 (1.1/2" to 48") CAT B: DN 40 to DN 1200 (1.1/2" to 48") |
| Pressure Rating |
CAT A Centric Disc: PN10, PN16, PN20 CAT B Offset Disc: PN10, PN16, Class 150 to Class 1500 |
| Operations |
Manual: Bare-shaft, Lever & Worm Gearbox Automation: Electric, Pneumatic, and Hydraulic Actuators |
| Shutoff Rating | Zero Leakage for Soft Seated & Metal Seated as per API 598 or relevant STD. |
Material Type Specification & Service Metallurgy
| TYPE OF SERVICE | VALVE SHELL MATERIAL | PRESSURE CONTROLLING PARTS & STEM |
|---|---|---|
| General Service | Carbon or Low-Alloy Steel (WCB, WCC, LCB, LCC) | Carbon or Low-Alloy Steel |
| General Service | Carbon or Low-Alloy Steel (WCB, LCC) | Stainless Steel (SS 304, SS 316, 17-4PH) |
| General Service | Stainless Steel (CF8, CF8M, CF3M) | Stainless Steel (SS 304, SS 316, SS 316L) |
| Sour Service (NACE MR0175) | Carbon or Low-Alloy Steel (NACE Compliant) | Carbon or Low-Alloy Steel |
| Sour Service (NACE MR0175) | Carbon or Low-Alloy Steel | Stainless Steel (SS 316 / 17-4PH NACE compliant) |
| Sour Service (NACE MR0175) | Stainless Steel (CF8M, CF3M) | Stainless Steel (SS 316, Duplex 2205) |
| Sour Service (Severe Corrosive) | CRA (Corrosion Resistant Alloy - Inconel 625, Hastelloy C, Monel) | CRA (Corrosion Resistant Alloy) |
Engineered for Critical Process Sectors
High-performance double offset butterfly valves designed for reliable operation across demanding industrial process utilities.
Oil & Gas Pipelines
Hydrocarbon transportation, refinery manifolds, compressor station isolation, and storage terminal flow control requiring API 607 fire-safe performance.
Petrochemical & Refining
Handling aggressive solvents, corrosive hydrocarbons, organic acids, and cracking processes where PTFE and metal-seated resilience are required.
Power Generation Stations
Steam turbine bypass, cooling tower circulation, boiler feed isolation, and flue gas desulfurization systems subjected to severe thermal cycles.
High-Pressure Water & Desalination
Reverse osmosis feed lines, brine discharge manifolds, and municipal high-pressure water transmission requiring cavitation resistance.
Marine & Offshore Platforms
Ballast systems, bilge handling, FPSO processing skids, and seawater cooling networks utilizing seawater-resistant Nickel Aluminum Bronze and Duplex alloys.
Pulp & Paper / Heavy Utilities
Black liquor handling, bleaching chemical lines, steam distribution headers, and vacuum filtration systems requiring dependable zero-leakage shut-off.
Explore Related Butterfly & Ball Valves
Centric Disc Butterfly Valves
Resilient seated concentric butterfly valves for HVAC, water supply, and general low-pressure utility lines.
Triple Offset Butterfly Valves
Frictionless conical metal-to-metal sealing for severe temperature extremes up to 550°C and Class 1500 pressures.
Soft Seated Ball Valves
Floating and trunnion soft-seated ball valves delivering zero-leakage shut-off for process media.
Need Custom Sizing or Automation for Double Offset Valves?
Our technical application engineers calculate Cv factors, actuator operating torque safety margins, and provide certified dimensional drawings.