In a trunnion ball valve, the ball is supported by a fixed shaft (trunnion) on both top and bottom, which absorbs the thrust load from line pressure. This makes trunnion valves ideal for high-pressure, large-diameter, and critical-service applications. In a floating ball valve, the ball is pressed against the downstream seat by line pressure — which works well for smaller sizes and lower pressures but can cause excessive operating torque and seat wear at higher classes. For Class 600 and above, or for sizes 6" and larger, a trunnion design is almost always recommended.

Yes. Our trunnion ball valves are API 607 (Ed. 7) and API 6FA certified for fire-safe service. The design features a primary soft seat (PTFE or PEEK) with a secondary metal seat backup. In the event of fire destroying the soft seat, the metal-to-metal seal provides positive shutoff. We can provide the fire-test certificate and witnessed test report with every order.

For standard configurations (Class 150-600, carbon steel body, standard trim), our lead time is 6-10 weeks from PO approval. For custom-engineered valves — including special materials (duplex, Monel, Inconel), extended bonnets, or NACE-compliant trim — lead time is 10-14 weeks. We also offer a 4-week expedited service for urgent requirements at a 15% premium. Over 90% of our orders ship on or before the confirmed date.

Absolutely. We routinely produce valves for sour gas (H₂S) service in compliance with NACE MR0175 / ISO 15156 for all wetted parts. This includes hardness-controlled materials (HRC ≤ 22 for carbon steel, HRC ≤ 35 for stainless steel), controlled sulfur content, and certified NACE trim. We provide full NACE documentation including material test reports, hardness test reports, and a NACE compliance matrix.

Our standard MOQ is 5 units per size/class combination. However, for first-time customers or sample orders, we can accommodate 1-2 units at a slightly higher unit price. We also offer a free sample valve (size 2"-6") for qualified buyers — you only pay shipping. This allows you to evaluate our quality and fit before committing to a larger order.

Yes. We welcome and encourage third-party inspection by BV, SGS, Lloyd's, DNV, or your own representative. Our facility in Hebei, China, is easily accessible, and we arrange inspection visits with 48 hours' notice. All valves are hydrostatically and pneumatically tested in accordance with API 598 / ISO 5208 in the presence of the inspector, and a signed test certificate is issued.

We ship via sea freight (FOB Tianjin or CIF to your nearest port), air freight, or express (FedEx/DHL for small orders). For US customers, we ship primarily to Houston, New Orleans, Los Angeles, and New York/Newark. We handle all export documentation, including customs clearance, certificate of origin, and bill of lading. Typical sea freight time to US Gulf ports is 25-30 days. We also offer door-to-door delivery for consolidated orders.

We provide a 24-month warranty from the date of shipment against manufacturing defects in materials and workmanship. This covers body porosity, seat leakage above allowed limits, stem seal failure, and structural defects. We also offer an extended warranty option (36-60 months) for critical-service applications with an additional quality assurance program. Our warranty is supported by a $2M product liability insurance policy through a major international insurer.