4MATIC 4M-DOB Double Flanged Offset Disc Butterfly Valve — Large Bore is an industrial spare component used for Municipal potable water transmission trunk mains and reservoir isolation. STARNEX Industrial Spares supplies and sources 4MATIC spare parts for maintenance engineers, plant operators, and procurement teams in Kenya and East Africa. Before ordering, verify the manufacturer part number (MPN), voltage/pressure specifications, and equipment compatibility.
4MATIC 4M-DOB Double Flanged Offset Disc Butterfly Valve — Large Bore
4MATIC 4M-DOB Double Flanged Offset Disc Butterfly Valve — Large Bore is an industrial spare component used for Municipal potable water transmission trunk mains and reservoir isolation. STARNEX Industrial Spares supplies and sources 4MATIC spare parts for maintenance engineers, plant operators, and procurement teams in Kenya and East Africa. Before ordering, verify the manufacturer part number (MPN), voltage/pressure specifications, and equipment compatibility.
Functional engineering application
The 4MATIC 4M-DOB Double Flanged Offset Disc Butterfly Valve — Large Bore (MPN: 4M-DOB) is built for continuous-duty industrial piping, holding pressure, temperature, and cycling loads in factory installations across Kenya and East Africa.
Quotation & fulfilment
Parametric technical attributes
| 4MATIC 4M-DOB | |
| IDENTIFICATION | |
| Component Type | 4MATIC 4M-DOB Double Flanged Offset Disc Butterfly Valve — Large Bore |
| Manufacturer / Brand | 4MATIC |
| Part Number (MPN) | 4M-DOB |
| Stock Keeping Unit (SKU) | STX-4M-4MDOB |
| TECHNICAL PARAMETERS | |
| Manufacturer | 4MATIC Global Valve Automation (India) |
| Model / MPN | 4M-DOB |
| Body Architecture | Double Flanged Body Short / Long Pattern (EN 558 Series 13/14) |
| Offset Geometry | Double Eccentric (Double Offset) Low-Friction Camming Disc |
| Shaft Bearings | Self-Lubricating PTFE-Lined Bronze Bushings with O-Ring Seals |
| Internal & External Coating | Fusion Bonded Epoxy (FBE) Coating Minimum 250 µm Thickness |
| Operation | Manual Worm Gearbox with Handwheel, Electric Actuator Ready (ISO 5211) |
| CONSTRUCTION & CONNECTION | |
| Size Range | DN 200 to DN 1600 (8" to 64" Nominal Bore) |
| Flange Compatibility | EN 1092-2 PN 10 / PN 16 / PN 25; ASME B16.5 / B16.47 Class 150 |
| Body Material | Ductile Iron EN-GJS-400-15 / ASTM A536 / Fabricated Carbon Steel |
| Disc Material | Ductile Iron Nickel Plated / Cast SS CF8M (SS316) / Duplex |
| Seat Sealing Ring | Retained Resilient EPDM (NBR Optional) with Stainless Retaining Ring |
| Shaft Material | Stainless Steel AISI 410 / 17-4PH / AISI 316 Two-Piece Stub Shafts |
| PERFORMANCE & RATINGS | |
| Pressure Rating | PN 10 / PN 16 / PN 25 (Class 150) |
| COMPLIANCE & LOGISTICS | |
| Stock Availability | In Stock — Enterprise Rd, Nairobi |
| KRA Tax Status | Official KRA E-TIMS Tax Invoice Available |
System fitment & verified replacements
Verified interchangeable models
Commonly installed on equipment from
Common questions on this part
In conventional centric valves, the rubber seat rubs against the disc through all 90 degrees of travel, causing rapid wear in large sizes. The double offset geometry lifts the disc away from the seat within the first few degrees of opening, virtually eliminating friction, reducing actuator torque by up to 50%, and extending seal life to decades.
Yes. The resilient seal ring is secured to the disc perimeter by a bolted stainless steel retaining ring. In large sizes, technicians can enter the pipe during maintenance shutdowns and adjust or replace the rubber seal ring without extracting the valve body from the pipeline.
STARNEX coordinates specialized freight, seaworthy export crating, and offloading logistics for large bore valves directly to project sites across Kenya and regional East African utilities.
