Centric Disc Butterfly Valves
Engineered with a centrally positioned circular disc and resilient elastomer seats (EPDM, Nitrile, Viton, Silicon) to deliver dependable bi-directional bubble-tight shut-off, low operating torque, and compact wafer/lugged installation across industrial process networks.
Precision Flow Regulation, Tight Shut-Off & Compact Quarter-Turn Design
ENGIPRO SOLUTIONS LLP Centric Disc Butterfly Valves are engineered to provide efficient and reliable flow control for liquids and gases across a wide range of industrial applications. Designed with a centrally positioned circular disc and a high-quality soft seat, these valves ensure tight shut-off, smooth operation, and dependable sealing performance, making them suitable for both routine and demanding fluid control systems.
Their compact design, lightweight construction, and quick quarter-turn operation make installation and maintenance simple while reducing space requirements. These valves are widely used in water treatment plants, HVAC and air handling systems, chemical processing facilities, and various industrial piping networks where reliable flow regulation and efficient operation are essential.
To meet diverse operational requirements, ENGIPRO Centric Disc Butterfly Valves are available with multiple actuation options, including manual bare-shaft, lever, worm gear, pneumatic, and electric operation. Manufactured for durability, ease of use, and long service life, they deliver consistent performance, operational efficiency, and dependable flow control across a broad range of industrial applications.
Special Features & Engineering Construction
Engineered to satisfy API 609 Category A, EN 593, and ISO 5752 requirements for tight shutoff and smooth flow throttling.
API 609 Compliance
Full compliance with API 609 Category A & B, featuring concentric disc geometry that ensures uniform 360-degree contact against the resilient liner.
Blowout-Proof Shaft
Heavy-duty one-piece or two-piece blowout-proof drive shaft retained with internal snap rings and precision dual O-rings for maximum operator safety.
Wafer & Lugged Bodies
Available in Short-pattern and Long-pattern wafer and fully threaded lugged body configurations suitable for end-of-line dead-end service.
Low Operating Torque
Contoured disc edge and spherical seating interface significantly reduce operating torque, allowing compact quarter-turn actuator selection.
10,000 Cycle Tested
Design Validation Test successfully completed for over 10,000 operational cycles with zero seat degradation or measurable pressure loss.
Elastomer Liner Options
Molded or replaceable seat liners in Black/White Nitrile (NBR), Black/White EPDM, Viton (FKM), and Silicone for diverse chemical compatibilities.
ISO 5211 Direct Pad
Integral ISO 5211 top mounting flange enables direct-mount coupling with pneumatic rack-and-pinion actuators or multi-turn electric actuators.
Zero Leakage Shutoff
Full elastomeric contact provides positive, bi-directional zero-leakage shutoff conforming strictly to API 598 and ISO 5208 Rate A standards.
Technical Details & Testing Specifications
Detailed manufacturing, dimensional, pressure testing, and flange standard matrix for ENGIPRO SOLUTIONS LLP Centric Disc Butterfly Valves.
Technical Details
EN 593 • API 609| Parameter | Manufacturing Specification |
|---|---|
| Special Features |
|
| Design Standards | EN 593 and API 609 Cat A & B |
| End Flanges | ASME B16.5, AWWA, EN 1092-1 |
| Face to Face | API 609, ISO 5752, BS EN593 |
| Testing Standard | API 598, ISO 5208, EN 12266-1 |
| End Connections |
Wafer and Lugged
Raised Face Flange (ASME B16.5, EN 1092-1)
|
| Sizes Range |
CAT A Centric Disc: DN 40 to DN 1200 (1.1/2" to 48")
CAT B Offset Disc: DN 40 to DN 1200 (1.1/2" to 48")
|
| Pressure Rating |
CAT A Centric Disc: PN10, PN16, PN20 (Class 150)
CAT B Offset Disc: PN10, PN16, Class 150 to Class 1500
|
| Operations |
Manual: Bare-shaft, 10-Position Throttle Lever, Heavy-Duty Worm Gearbox
Automation: Pneumatic Actuators, Electric Actuators, and Hydraulic Actuators
|
| Shutoff Rating | Zero Leakage for Soft Seated & Metal Seated as per API 598 or relevant STD (Rate A). |
Material Type Specification
Recommended metallurgy for general services, water/effluent distribution, and NACE MR0175 sour service.
| Type of Service | Valve Shell Material | Pressure Controlling Parts & Stem |
|---|---|---|
| General Service | Carbon or Low-Alloy Steel (Ductile Iron GGG40, WCB, A105) | Carbon or Low-Alloy Steel (Nickel Plated / Epoxy Coated) |
| General Service | Carbon or Low-Alloy Steel (WCB, DI) | Stainless Steel (SS 304, SS 316, Al-Bronze) |
| General Service | Stainless Steel (ASTM A351 CF8, CF8M, CF3, CF3M) | Stainless Steel (ASTM A182 F304, F316, F316L, 17-4PH) |
| Sour Service | Carbon or Low-Alloy Steel (NACE compliant) | Carbon or Low-Alloy Steel (NACE MR0175 heat treated) |
| Sour Service | Carbon or Low-Alloy Steel (LF2, LCC) | Stainless Steel (SS 316 / SS 316L NACE) |
| Sour Service | Stainless Steel (CF8M, Duplex 2205) | Stainless Steel (F316, F51 Duplex) |
| Sour Service | CRA (Corrosion Resistant Alloy - Inconel, Monel, Hastelloy) | CRA (Corrosion Resistant Alloy - Super Duplex, Inconel 625) |
Target Industrial Environments
Engineered for high flow coefficient (Cv), minimal weight, and fast quarter-turn operation across municipal and industrial applications.
Water Treatment
Potable & Effluent PlantsHVAC & Chilled Water
Air Handling & Cooling TowersChemical Processing
Inorganic Fluids & SlurriesFire Protection
Fire Water Main RingsDesalination
Seawater & Reverse OsmosisGeneral Utilities
Low-Pressure Air & GasesRelated Butterfly Valve Categories
Double Offset Butterfly Valves
High performance offset shaft design reducing seat wear for elevated pressure and critical process isolation.
View SpecificationsTriple Offset Butterfly Valves
Frictionless metal-to-metal seating engineered for extreme steam, high temperatures, and zero leakage shutoff.
View SpecificationsSoft Seated Ball Valves
Virgin PTFE, RPTFE, and PEEK seats delivering zero-leakage isolation for clean liquid and industrial gas pipelines.
View SpecificationsNeed Centric Butterfly Valve Sizing or Actuator Packages?
Our engineering team in Ahmedabad, Gujarat provides Certified Material Test Reports (MTRs to EN 10204 3.1), lining chemical compatibility charts, and custom pneumatic/electric actuator automation packages.