OS&Y (Outside Screw and Yoke): the stem threads move outside the valve body, giving a visual indication of valve position — preferred for fire protection and critical isolation. NRS (Non-Rising Stem): the stem thread stays inside, suitable for limited headroom applications like underground pits. Both configurations are available in our flanged gate valve line.

Our primary range is flanged (ASME B16.5 / EN 1092-2). For special end connections, please contact our OEM team — we can produce threaded, socket-weld, or butt-weld ends on request with minimum order quantity 50 pcs.

Standard MOQ is 10 pcs per size. For first-time trial orders, we offer 2 pcs sample order at cost price. Contact us for your specific requirements.

Every batch undergoes 100% shell test and seat leakage test per API 598. Material traceability from mill certificate to final report. Third-party inspection (SGS, BV, Lloyds) is available at your cost — and we routinely achieve < 0.5% defect rate.

28–35 days from order confirmation to loading at Tianjin port. For urgent orders, we can expedite in 22 days (subject to foundry capacity). Ocean freight to US West Coast takes approximately 18–22 days.

Yes — we provide 1 free sample valve (up to NPS 4″) for qualified buyers. You only pay the shipping cost. This allows you to verify the quality, fit, and finish before committing to a full order.

Standard terms: 30% deposit + 70% balance against copy of shipping documents. For established buyers with credit history, we accept LC at sight or net 30 days after credit approval. Wire transfer and PayPal (for small amounts) are also supported.