Industrial Butterfly Valves
High-performance quarter-turn butterfly valves engineered for compact pipeline installation, maximum flow coefficient (Cv), and dependable bi-directional shut-off. Featuring resilient elastomer seated centric designs, dual-offset high-performance models, and severe-service triple-offset metal seated valves rated up to Class 1500.
Compact Footprint, High Flow Capacity & Bubble-Tight Sealing
ENGIPRO SOLUTIONS LLP designs and manufactures industrial butterfly valves engineered to optimize plant piping efficiency, minimize mechanical weight, and deliver dependable bi-directional fluid control. Conforming strictly to API 609 Category A & B, EN 593, and ISO 5752 face-to-face dimensions, our butterfly valves are widely deployed in process utilities, water transmission, power generation, and severe petrochemical networks.
Our product line features three distinct engineering architectures: Centric Disc Butterfly Valves with molded or replaceable elastomer seats (EPDM, Nitrile, Viton) for HVAC and water treatment; Double Offset Butterfly Valves utilizing cam-action geometry to reduce seat wear in chemical and hydrocarbon service; and Triple Offset Butterfly Valves featuring frictionless conical metal-to-metal seating for extreme temperatures (-196°C to +550°C) and Class 1500 pressures.
Every valve is engineered with an anti-blowout shaft, blowout-proof retention rings, standardized ISO 5211 direct actuator mounting pads, and certified fire-safe protection in accordance with API 607 and ISO 10497. Available with manual lever, precision worm gearboxes, pneumatic scotch yoke actuators, and electric quarter-turn automation.
Explore Butterfly Valve Models & Configurations
Click any valve model below to view complete engineering parameters, dimensional drawings, and material selection matrices.
API 609 CAT A • RESILIENT SEAT
Centric Disc Butterfly Valves
Centrally positioned disc with resilient elastomer seats (EPDM, Nitrile, Viton, Silicon) for HVAC, water supply, and general low-pressure utility lines.
API 609 CAT B • HIGH PERFORMANCE
Double Offset Butterfly Valves
Dual-eccentric camming action lifts the disc away from seat immediately upon opening, reducing friction, torque, and wear in demanding process services.
API 609 CAT B • SEVERE SERVICE
Triple Offset Butterfly Valves
Frictionless conical metal-to-metal seating engineered for severe temperatures (-196°C to +550°C), superheated steam, and pressures up to Class 1500.
Special Features & Engineering Construction
Engineered in compliance with API 609, EN 593, and ISO 5752 requirements for tight shut-off, long service life, and smooth flow throttling.
API 609 Full Compliance
Strict compliance with API 609 Category A (Centric) and Category B (Offset) covering wall thickness, stem retention, and pressure testing.
Blowout-Proof Shaft
One-piece heavy-duty blowout-proof stem construction with high-strength retaining collars compliant with API 609 Cat B and ASME B16.34.
Fire-Safe Certified
Full all-metal or laminated stainless steel/graphite construction delivers inherently fire-safe protection certified to API 607 and ISO 10497.
10,000 Cycle Endurance
Design Validation Testing verified for over 10,000 continuous full-stroke cycles with zero seat galling and zero seat degradation.
Class 150 to 1500 Ratings
Capable of withstanding elevated pipeline pressures from ASME Class 150 up to Class 1500 (PN10 to PN250) across extreme temperatures.
Bi-Directional Zero Leakage
Precision torque-seated mechanical wedging achieves certified bubble-tight bi-directional isolation conforming to API 598 and ISO 5208 Rate A.
ISO 5211 Direct Automation
Precision-machined top flange conforming to ISO 5211 enables direct coupling to pneumatic scotch yoke, quarter-turn electric, or gear drives.
Short & Long Pattern
Manufactured in wafer, lugged, and double-flanged bodies conforming to API 609, ISO 5752, and BS EN 593 face-to-face dimensions.
Technical Specifications
Certified engineering data and manufacturing compliance for ENGIPRO Industrial Butterfly Valves.
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 temperature metal-to-metal seating / Elastomer options • Fire-Safe Design for Offset Valves • Actuator mounting pads to ISO 5211 |
| End Flanges Compatibility | ASME B16.5, AWWA, EN 1092-1, ASME B16.47 |
| Face to Face Dimensions | API 609, ISO 5752, BS EN 593 |
| Testing Standard | API 598 / ISO 5208 Rate A (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, Heavy-duty Lever & Worm Gearbox Automation: Electric, Pneumatic, and Electro-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 (ASTM A216 WCB / WCC) | Carbon or Low-Alloy Steel |
| General Service | Carbon or Low-Alloy Steel (ASTM A352 LCB / LCC) | Stainless Steel (SS 304, SS 316, 17-4PH) |
| General Service | Stainless Steel (ASTM A351 CF8, CF8M, CF3M) | Stainless Steel (SS 316, SS 316L) |
| Sour Service (NACE MR0175) | Carbon or Low-Alloy Steel (NACE Heat Treated) | Carbon or Low-Alloy Steel |
| Sour Service (NACE MR0175) | Carbon or Low-Alloy Steel (WCB/LCC + NACE) | Stainless Steel (SS 316 / 17-4PH NACE certified) |
| Sour Service (NACE MR0175) | Stainless Steel (CF8M, CF3M, Duplex CD4MCu) | Stainless Steel (SS 316 / 2205 Duplex) |
| Sour Service (Severe Corrosive) | CRA (Corrosion Resistant Alloy - Inconel 625, Hastelloy C, Monel) | CRA (Corrosion Resistant Alloy) |
Need Custom Butterfly Valve Automation or High-Temperature Sizing?
Our technical engineers assist with thermal gradient finite element analysis, material compatibility for sour service, and actuator sizing calculations.