In the current era of Industry 4.0, the global valve market is shifting from traditional mechanical components to high-precision, automated flow control systems. Wafer and Lug type butterfly valves represent the backbone of this transition, offering lightweight, cost-effective, and versatile solutions for water treatment, HVAC, and chemical processing.
The demand for "Smart Valves" equipped with IoT sensors is skyrocketing. Manufacturers are now focusing on sustainability—reducing fugitive emissions and utilizing recyclable materials like GGG40 ductile iron and CF8M stainless steel to meet stringent environmental ESG criteria.
Future development is focused on "Triple Offset" designs for high-pressure steam and cryogenics, alongside the integration of digital twin technology for predictive maintenance. KR Valve Group is at the forefront, investing in R&D to ensure zero-leakage performance under extreme conditions.
Choosing the right valve interface is critical for system integrity. As a premier OEM butterfly valve manufacturer, we provide both configurations tailored to specific engineering needs.
| Feature | Wafer Type Butterfly Valve | Lug Type Butterfly Valve |
|---|---|---|
| Installation | Sandwiched between two pipe flanges. | Bolted directly to the flanges via threaded inserts. |
| End-of-Line Service | Not recommended. System must be depressurized. | Ideal. Can be installed at pipe ends for downstream maintenance. |
| Cost Efficiency | Lower cost, lighter weight. | Slightly higher cost due to material and machining. |
| Pressure Rating | Typically up to PN16/ANSI 150. | Superior stability for higher pressure fluctuations. |
KR Valve Group has more than 20 years of experience in producing standard and non-standard valves of various types. We supply a wide selection of over 500 valve products, including butterfly valve, gate valve, check valve, water control valve, as well as all their matching and accessory products.
Our products are exported to over 50 countries and regions in Europe, Asia, Africa, and Oceania. We have won high repeat purchase rates from customers with excellent product variety and quality. Beyond product excellence, we are dedicated to creating a mutually beneficial partnership with every customer.
In regions like the Middle East and Southeast Asia, our EPDM-lined wafer butterfly valves are used for large-scale desalination and sewage plants, ensuring corrosion resistance against saline environments.
Our Lug type valves provide reliable isolation for district heating systems in Europe, allowing for maintenance without draining the entire network—a critical localized requirement for urban infrastructure.
With compact designs and ductile iron bodies, our valves are preferred by global shipyards for ballast water management systems (BWMS), meeting strict international maritime safety standards.
R&D department ensures product design and continuous innovation. Our lab provides modern testing capabilities to elevate product performance. We have 20 series and over 500 varieties.
Manufactured under ISO-9001. We have 15 machining machines and experienced assembly lines. Over 30 production equipment updated monthly to ensure timely delivery.
Zero leakage is our principle. We conduct rigorous inspections on appearance, size, and pressure according to international standards and issue comprehensive reports.
Chile Dam Project: KR supplied various water control valves for high-pressure hydraulic control.
Italy Waterworks: Supplied big size butterfly valves and check valves for municipal supply.
Indonesia Sludge Plant: Efficient butterfly and gate valves for industrial waste management.
Vietnam Chemical Plant: Corrosion-resistant valves for hazardous fluid processing.
For industrial applications, we typically use Ductile Iron (GGG40/50), WCB Cast Steel, or Stainless Steel (CF8/CF8M). Seating materials like EPDM, NBR, or PTFE are selected based on the chemical compatibility and temperature of the medium.
No, wafer valves are designed to be clamped between two flanges. Removing downstream piping will cause the valve to lose its structural seat, leading to leakage. For dead-end or end-of-line service, a Lug Type butterfly valve is mandatory.
We utilize multi-stage pressure testing (Hydrostatic and Pneumatic) according to API 598 or EN 12266-1 standards. Our precision-machined discs and high-resilience seats ensure a bubble-tight shut-off every time.
Depending on the specifications and quantity, our monthly inventory updates and 15+ machining centers allow us to maintain a flexible production plan, typically delivering within 30-45 days for custom OEM series.
Partner with KR Valve Group for industry-leading expertise, comprehensive product ranges, and an unwavering commitment to quality. Experience the difference of premium OEM engineering.
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