We stock lockable butterfly valves from DN50 (2″) up to DN600 (24″) in wafer and lug configurations. Larger sizes up to DN1200 (48″) are available for custom orders. All sizes accept standard padlock shackles (6–8 mm).

Yes — we offer OEM/ODM handle design with laser‑etched or cast logos. Minimum quantity for custom branding is just 10 units. We also provide custom packaging and barcode labels for US distributors.

Standard sea freight from China to US West Coast takes 18–22 days. We offer DDP (Delivered Duty Paid) terms — you pay one fixed price with no surprises. For urgent orders, express airfreight delivers in 4–7 days. We’ll provide a full landed cost breakdown within 4 hours of your RFQ.

Our standard lockable lever handle accepts shackle diameters up to 8 mm (5/16″). For gearbox‑operated valves, we provide a hasp that fits most industrial padlocks (up to 10 mm shackle). All handles are compatible with master‑keyed lockout kits.

Absolutely. We offer free samples for qualified buyers (you pay freight). Standard sample sizes are DN50–DN100 (2″–4″). Once approved, we match production to the sample — no deviation. We also keep your sample file for repeat orders.

We accept T/T wire transfer (30% deposit / 70% before shipment), L/C at sight, and for established US/UK buyers — net 30 terms up to $20,000. We also accept Alibaba Trade Assurance for extra buyer protection.

Every production batch follows our 7‑step QC plan: material incoming check → casting inspection → machining dimensional check → hydrostatic test (1.5× rated) → seat leak test (Class A) → handle/coating check → final packing inspection. Reports are uploaded to your order portal.