A hydraulic operated butterfly valve uses pressurized fluid (typically oil or water-glycol) to actuate the valve disc, delivering significantly higher torque density than pneumatic or electric actuators of the same frame size. This makes hydraulic actuation ideal for large-diameter valves (DN300+), high-pressure applications (up to Class 600), and environments where fail-safe spring-return operation is required. Hydraulic systems also offer superior modulation accuracy (±1%) for precise flow control in critical processes.

For standard sizes (DN50–DN300) with common materials and actuator configurations, our lead time is 15–25 working days from order confirmation. For larger diameters (DN350–DN600) or custom OEM designs, typical lead time is 4–6 weeks. We also offer express air freight service for urgent orders — delivery to USA or European airports in 7–12 days. Contact us with your specific requirements for a confirmed schedule.

Absolutely. Our in-house engineering team specializes in OEM and custom designs. We can accommodate: custom flange drilling patterns (any standard), actuator mounting brackets for third-party actuators, special stem extensions, limit switch box integration, solenoid pilot valves, and manual override gearboxes. We provide 3D model approval (STEP/IGES) before production. Minimum order quantity for custom designs is typically 5–10 units, depending on complexity.

We ship via sea freight (FOB, CIF, or DDP) and air freight (FCA or DAP) depending on your preference. Our logistics team has extensive experience shipping to USA ports (Los Angeles, Houston, New York, Savannah) with typical sea transit times of 22–30 days. We handle all export documentation — commercial invoice, packing list, bill of lading, certificate of origin, and compliance certificates. For DDP shipments, we manage customs clearance and final delivery to your facility.

We offer a standard 18-month warranty from the date of shipment against manufacturing defects in materials and workmanship. For critical applications, extended warranties are available on request. Our after-sales support team responds to 95% of technical inquiries within 2 hours (business hours, UTC+8). We maintain a spare parts inventory for fast-moving components (seal kits, actuator seals, limit switches) and can ship replacements within 48 hours. For on-site troubleshooting, we collaborate with local service partners in major markets.

Yes. We provide sample orders for evaluation purposes. For standard hydraulic butterfly valves, we can supply 1–2 units at sample pricing (with a lead time of 15–20 days). Sample cost is deductible from your first bulk order. We also offer free sample valves for qualified engineering evaluation projects — contact us with your application details to see if you qualify.

We accept T/T (wire transfer) — typically 30% deposit with 70% balance against shipping documents — and L/C (Letter of Credit) at sight for qualified buyers. For established customers with a purchase history, more flexible terms can be discussed. We also accept PayPal for small sample orders (under USD 2,000). All payments are processed through our corporate bank accounts with full invoice documentation.

Actuator sizing depends on: valve size and type, differential pressure, operating temperature, media characteristics, and safety factor requirements. As a rule of thumb, the actuator must provide 1.5–2.0 times the valve's maximum break torque to ensure reliable operation under all conditions. Our engineering team provides complimentary actuator sizing — simply send us your operating parameters (pressure, temperature, media, and desired fail-safe position) and we'll recommend the optimal actuator configuration. We use industry-standard calculation methods per ISO 5211 and AWWA C504.