More and more global buyers directly dock with Chinese ball valve manufacturers, mainly because cost can be reduced by 20%–40%, saving middle trade links; Response
Drawing size tolerance (±0.05mm), material standard (such as ASTM A105), pressure class (Class 150–2500), marking content and position (marking depth 0.3mm), inspection scope (100% water
Soft seated ball valves are suitable for clean media, temperature ≤200°C, leakage class can reach ANSI Class VI; metal seated are suitable for particle-containing or
API forged ball valve selection needs to satisfy API 6D standard (covering 150–2500 pressure levels), and provide MTC, pressure test reports and other complete documents;
Reliable forged steel ball valve export factory look at three points: ① export experience ≥ 5 years, annual shipment ≥ 5000 units; ② Quality control:
Materials: A105 stainless steel approximately ¥120-200 per unit, 316 stainless steel ¥300-600; Quantity: Price decreases by 5%-10% for 100 units, and by 15%-25% for 1000
Forged ball valve because of overall forging structure dense, strength increases about 20%-30%, pressure resistance can reach Class 1500 above, leakage rate is lower than
①Pressure rating, such as Class 1500/2500 (corresponding to about 25–42MPa); ②Material, such as A105 applicable to ≤425℃ carbon steel working conditions, F316 corrosion-resistant; ③Connection method,
Under high temperature (≥450℃) or strong wash working conditions, sphere choose Ni60 (hardness about HRC58-62), valve seat choose Ni55 (HRC52-56) can form hard-tough pair. Suggest
Stellite in high-temperature ball valves usually is better: its melting point is about 1285–1410°C, corrosion resistance is close to stainless steel, and impact resistance and
