600-class ball valve refers to a ball valve that meets the American standard pressure grade Class 600 (pound grade), with a design pressure of about 10MPa, suitable for industrial pipeline systems with high pressure, high temperature or corrosive media. The following are its core characteristics and technical points:
- Core definition and standard
Pressure grade: Class 600 corresponds to the nominal pressure PN100 (about 10MPa), mainly following American standards such as API 608 and ASME B16.34 to ensure sealing and structural strength under high pressure conditions.
Size range: The nominal diameter covers DN15–DN600 (or NPS 1/2–24), meeting the needs of large-diameter high-pressure pipelines.
- Key design features
Structural type
Floating design (such as Q41F-600LB): Relying on the medium pressure to push the ball to press the valve seat to achieve sealing, compact structure, suitable for pipelines with DN≤200.
Full bore/reduced bore optional: Full bore ball valves (such as 600 series) have low flow resistance, and reduced bore ball valves (such as SUS304<V03 – 304>) can reduce costs and volume.
Material and seal
Valve body material: Mainly carbon steel (WCB/A105) and stainless steel (304/316L), corrosion-resistant and with strong pressure bearing capacity.
Seal configuration: Soft seal (PTFE) is used for clean media at room temperature; hard seal (metal cladding) is suitable for high temperature (≤538℃) or fluid containing particles.
Safety function
Fireproof design: After the soft seal is burned, the metal sealing structure can still block the medium (according to API 607 standard).
Anti-static device: The ball static electricity is guided out through the valve stem spring to prevent flammable media from igniting.
- Typical application scenarios Energy industry: Oil and natural gas transportation (Class 600 ball valve is used for wellhead control, LNG pipeline).
Chemical system: highly corrosive media (such as acid and alkali solutions), high-pressure reaction pipelines.
Special fields:
Sanitary linear control valves (600 series) are used for food and pharmaceutical aseptic processes.
Black water/grey water treatment (KQC600 series ball valves are resistant to particle erosion).