Explore our flagship heavy-duty butterfly valves, gate valves, check valves, and strainers engineered to ISO, DIN, ANSI, and BS standards.
In industrial liquid and gas handling pipelines, the 4 Inch Wafer Butterfly Valve (DN100) serves as a crucial workhorse for flow isolation and throttling. Designed to fit securely between pipe flanges (ANSI Class 125/150, PN10/PN16, JIS 10K), its compact face-to-face dimension (conforming to API 609, ISO 5752 series 20, and BS EN 593) drastically minimizes space requirements while offering a lightweight alternative to traditional gate or globe valves.
Fabricated using high-grade Ductile Iron (GGG40 / ASTM A536), Cast Steel (WCB), or Austenitic Stainless Steels (CF8 / CF8M). Tensile strength exceeding 400 MPa guarantees exceptional resistance against line surge and water hammer stresses.
Custom vulcanized or replaceable seat liners engineered from EPDM (Drinking Water/HVAC), NBR (Oils/Fuel), PTFE/RTFE (Aggressive Chemicals), or Viton (High-Temp/Corrosive gas). Ensures zero-leakage shutoff under full differential pressure.
Equipped with standardized ISO 5211 top flange mounting patterns (typically F05/F07 with 11mm or 14mm square stem drives). Allows seamless field retrofitting with pneumatic actuators, electric servomotors, or worm gearboxes.
| Nominal Size | Pressure Rating | Flow Coefficient ($C_v$ at 90°) | Breakaway Torque (Nm @ 16 Bar) | Face-to-Face Standard | Top Flange Mounting |
|---|---|---|---|---|---|
| 4 Inch (DN100) | PN10 / PN16 / Class 150 | 650 - 780 GPM | 45 - 60 Nm | ISO 5752 Col. 20 / API 609 | ISO 5211 F07 (14mm SQ) |
| 3 Inch (DN80) | PN10 / PN16 / Class 150 | 380 - 440 GPM | 30 - 40 Nm | ISO 5752 Col. 20 / API 609 | ISO 5211 F05 / F07 |
| 6 Inch (DN150) | PN10 / PN16 / Class 150 | 1,570 - 1,800 GPM | 110 - 145 Nm | ISO 5752 Col. 20 / API 609 | ISO 5211 F07 / F10 |
| 8 Inch (DN200) | PN10 / PN16 / Class 150 | 3,100 - 3,500 GPM | 210 - 280 Nm | ISO 5752 Col. 20 / API 609 | ISO 5211 F10 |
Statistical analysis of custom 4-inch wafer butterfly valve supply chains, production volume, and quality verification standards.
China's flow control manufacturing hubs (such as Tianjin, Zhejiang, and Jiangsu) have evolved from traditional OEM casting foundries into high-precision, automated valve technology centers. Overseas engineering firms, EPC contractors, and stocking distributors gain unmatched strategic advantages by sourcing custom 4-inch wafer butterfly valves directly from Chinese direct-line factories.
Chinese valve clusters feature localized supply webs spanning raw sand/investment casting, precision CNC machining, powder epoxy coating (WRAS/NSF-61 certified), rubber compounding, automated assembly, and testing. This vertical consolidation shortens lead times by 35% to 50% compared to Western manufacturers.
Factories easily adjust disc materials (Aluminium Bronze C95800, SS316, SS304, Nylon-coated DI), stem dimensions (Double-D, Keyway, Square), stem extensions for buried service, custom lever handle colors, laser-etched branding, and customized pressure ratings (PN6 to PN25).
Modern Chinese manufacturers enforce 100% shell hydrostatic testing (1.5x PN) and seat tightness testing (1.1x PN) in compliance with API 598, ISO 5208, and EN 12266-1 prior to packaging. Material heat numbers and chemical analysis certificates (EN 10204 3.1) are standard practice.
The global valve industry is experiencing rapid digital and environmental evolution. Modern 4-inch wafer butterfly valves are evolving beyond simple manual mechanical devices into intelligent, long-life flow components.
Integration of low-power wireless IO-Link and Bluetooth diagnostic modules directly inside the valve top-works allows real-time tracking of operational torque, stroke count, seat degradation, and stem vibration. This enables predictive maintenance schedules, eliminating catastrophic line failures in municipal water networks and chemical plants.
Environmental regulations (such as ISO 15848-1 and TA-Luft) demand zero stem leakage. New 4-inch wafer valve designs utilize live-loaded PTFE shaft packings, secondary O-ring seals, and bio-compatible vulcanized EPDM compounds free from nitrosamines, meeting stringent drinking water safety standards (NSF/ANSI 61, WRAS, ACS).
Due to its ultra-compact face-to-face dimension, light weight, and reliable sealing, the custom 4-inch wafer butterfly valve is widely deployed across major global infrastructure sectors.
In chilled water loops, cooling tower isolation, and hydronic balancing systems, 4-inch wafer butterfly valves with EPDM seats provide precise throttling control, low head loss, and minimal thermal bridge losses.
Installed in filtration skids, backwash lines, sludge dewatering manifolds, and chemical dosing systems. Ductile iron bodies coated with 250-micron fusion-bonded epoxy resist tuberculation and chemical corrosion.
For Reverse Osmosis (SWRO) facilities and shipboard ballast water treatment systems (BWTS), 4-inch wafer valves equipped with Nickel Aluminum Bronze (C95800) or Super Duplex Stainless Steel (2507) discs resist pitting and crevice corrosion.
To ensure seamless international trade and long-term operating safety, enterprise buyers must evaluate manufacturers against the following technical criteria:
- EN 10204 Type 3.1 Inspection Certificate: Chemical composition and mechanical testing of body casting batch.
- Hydrostatic & Air Testing Reports: API 598 / ISO 5208 seat leak rates (Rate A - Zero Leakage).
- Coating Thickness Verification: Elcometer magnetic test for epoxy coating (>250μm requirement).
- Seaworthy Packaging: Fumigated wooden crates with plastic shroud and moisture-absorbing desiccant.
- Stem Protection: End-cap caps protecting disc edges and polished stem extensions from transport damage.
- Private Labeling: Customized aluminum nameplates, barcode tracking tags, and OEM color cartons.
In-depth answers to common questions regarding design, installation, torque, and material selection for 4-inch wafer butterfly valves.
Complete your pipeline package with our specialized strainers, PTFE-lined valves, check valves, and air release valves.
