| Parameter | Specification |
| Size | DN1000 (NPS 40") |
| Pressure Rating | PN10 (10 bar / 145 psi) |
| Design Standard | GB/T 12238, EN 593, API 609 |
| Face-to-Face | ISO 5752 (Short / Long pattern available) |
| Flange Drilling | EN 1092-2 PN10 |
| Valve Type | Concentric U-section butterfly valve |
| Operation | Worm Gearbox (standard) / Pneumatic Actuator / Electric Actuator |
| Temperature | -30°C to +120°C (depending on seat material) |
| Leakage Rate | Bubble-tight (ISO 5208 Rate A / Class VI) |
| Applications | Potable water, raw water, wastewater, seawater, industrial process |
The rubber seat is locked into the body via a precision-machined dovetail groove, providing secure anchorage under high pressure and preventing seat dislodgement during operation. Unlike bonded seats, this design allows the seat to be replaced in the field using simple tools, extending the valve service life without removing it from the pipeline.
The U-shaped body profile maximizes structural rigidity while minimizing weight. This design is particularly advantageous for large-diameter valves (≥DN600), reducing material costs and making installation easier without compromising pressure-holding capability.
Full rated pressure seal in both flow directions, simplifying system design and allowing installation in any orientation.
Anti-blowout stem design with double O-ring sealing prevents external leakage and ensures safe operation under pressure.
Standardized mounting pad allows direct installation of gearbox, pneumatic, or electric actuators without adapter plates.
| Component | Standard Material | Optional Materials |
|---|---|---|
| Body | Ductile Iron ASTM A536 65-45-12 | Cast Steel WCB / Stainless Steel CF8 |
| Disc | Ductile Iron + Nylon 11 Coating | CF8M (316 SS) / Ductile Iron + Epoxy / Al-Bronze C95800 |
| Stem | Stainless Steel 416 | 316 SS / 17-4 PH / Monel |
| Seat | EPDM (dovetail anchored, exchangeable) | NBR / Viton / Neoprene / Silicone |
| Bushings | Bronze | PTFE / Nylon / Ductile Iron |
| O-Rings | NBR | EPDM / Viton |
| Body Coating | NSF/ANSI 61 Epoxy (min 250µm) | Two-part polyamide epoxy / Fusion-bonded epoxy |
| Material | Temp. Range | Key Properties | Best For |
|---|---|---|---|
| EPDM | -30°C to +120°C | Excellent ozone, weather & hot water resistance | Potable water, wastewater, hot water |
| NBR | -20°C to +80°C | Good oil & fuel resistance | Oils, fuels, mild chemicals |
| Viton (FKM) | -20°C to +180°C | Excellent chemical & heat resistance | Strong acids, high-temperature |
| Neoprene | -20°C to +100°C | Good seawater & refrigerant resistance | Seawater, fire protection |
| Silicone | -40°C to +200°C | FDA compliant, excellent low-temp flexibility | Food, pharmaceutical, high-purity |
A: A U-section butterfly valve has a U-shaped body profile that provides additional structural strength for large-diameter applications while reducing overall weight compared to traditional round-body designs.
A: With proper selection of seat material for the application, the EPDM seat typically lasts 5–10 years depending on operating conditions. The dovetail design allows replacement within 1–2 hours in the field.
A: Yes. The valve has an ISO 5211 standard mounting pad compatible with pneumatic actuators, electric actuators, and worm gearboxes.
A: Yes. The nylon 11 coated disc and fusion-bonded epoxy coated body provide excellent corrosion resistance for buried service. Stem extensions are available for deep burial applications.
A: Standard configuration lead time is 15–25 working days. Custom materials may require 25–40 working days.
A: Yes, our technical team provides installation manuals, drawings, and remote commissioning support for all large-diameter valves.
Contact Laux Valve today for a quotation, technical drawing, or material recommendation for your DN1000 PN10 U-section butterfly valve requirement.
From raw material inspection to final delivery, every butterfly valve undergoes a comprehensive quality inspection to ensure reliable performance and compliance with international standards.
