A wafer butterfly valve is designed to be clamped between two pipe flanges. It is more compact and generally less expensive, making it ideal for dead-end or isolation service where the downstream pipe isn't immediately pressurized. A lug butterfly valve has threaded inserts (lugs) that allow it to be bolted directly to two flanges, or one flange while the other pipe is removed. This allows for downstream maintenance without system shutdown. For US HVAC and waterworks, lug valves are often preferred for critical isolation points. Our team can help you select the right type based on your system pressure and maintenance needs.

Yes, we manufacture butterfly valves that comply with AWWA C504 for waterworks applications. This includes the proper shell thickness, disc design, and seat interface for Class 150B. We also test to API 609 for other industrial applications. Please specify your required standard when submitting an RFQ so we can provide the correct documentation.

For standard sizes (2"-12") and materials (Ductile Iron, EPDM seat), the lead time is approximately 30-45 days from order confirmation to shipment. For larger sizes or custom alloys (e.g., SS316 disc, PTFE seat), it is typically 45-60 days. We also offer a fast-track program for urgent shutdowns that can deliver in 15-20 days.

Absolutely. A full set of documentation is standard with every order, including Material Test Reports (MTRs) for body, disc, and shaft, pressure test certificates, and a certificate of conformity. We can provide weld procedures (WPS/PQR) if required for your specific project specifications (e.g., for NACE or sour gas service).

We offer a standard 18-month warranty from the date of shipment against manufacturing defects in materials and workmanship. For established OEM partners, we are flexible in negotiating extended warranty terms. We believe in building trust through product reliability, not just paperwork.

We are experts in export logistics. We can quote on a FOB (Tianjin/Qingdao), CIF, or DDP (Delivered Duty Paid) basis. By consolidating containers and optimizing packaging, we help minimize shipping costs. For urgent orders, we offer competitive sea-air freight options. Our documentation is prepared to ensure smooth customs clearance in the US.

For initial orders, typical terms are 30% deposit with the order, 70% balance paid before shipment or against a copy of the Bill of Lading. For well-rated companies or after a successful initial order history, we can discuss more flexible terms such as L/C or net 30/60.

Yes, this is one of our core strengths. Our engineering team has over a decade of experience in OEM/ODM design. Whether you need a specific face-to-face dimension, a unique stem key, or a special coating, we can develop it. We offer complete confidentiality agreements and treat your designs as proprietary information.