1. Basic concept
Standard port ball valve refers to the type of ball valves in accordance with international common standards (such as API, ASME, BS, etc.), its interface size, pressure level and design specifications are implemented in accordance with the unified industry standards for oil, gas, chemical and other fields of fluid control.
2. Core standard specification
API standard:
API 6D: for pipeline ball valves, covering Class150~Class1500 pressure levels, operating temperature range -28℃~300℃.
API 608: for flange / threaded connection of steel ball valves, specification of sealing performance and material suitability.
ASME Standard:
ASME B16.34: Defines pressure-temperature ratings and material selection requirements for valves, covering low temperature (e.g. -196°C) to high temperature scenarios.
Other standards:
BS 5351 (British Standard), ISO 17292 (International Standard), etc., all of which provide specific requirements for ball valve structure, testing and operational performance.
3. Typical structural features
Interface standardisation:
Nominal diameter covers DN15~DN600 (NPS ½~24), flanged/butt-welded ports are designed according to ASME B16.5 and other standards.
Seal & Material:
PTFE or reinforced composite material sealing is adopted to support automatic compensation for wear and adapt to pressure fluctuations6; the valve body material is mainly made of stainless steel (e.g., 304/316L), which is resistant to corrosion and low temperature shrinkage.
Safety design:
Explosion-proof valve stem, low-torque worm gear actuator and other features to meet the safety requirements of flammable and explosive media.
4. Main Application Scenarios
Oil and gas transmission: API 6D standard ball valves are widely used in long-distance pipeline medium cut-off and regulation.
Chemical deep-cooling system: low-temperature ball valves in accordance with ASME B16.34 are suitable for liquid oxygen (-196 ℃), liquefied natural gas and other extreme conditions.
Industrial automation control: adapted to electric/pneumatic actuators, to achieve remote switching or flow regulation.