Designed and produced in accordance with GB, ANSI, API, DIN, BS, JIS and other advanced criteria both at home and abroad, all our valves are made of stainless steel, carbon steel and alloy steel. Our valves also conform to such technical parameters as: maximum caliber: 20”(DN500); maximum pressure: 2500LB (PN420); highest temperature: 450℃;lowest temperature: -120℃.