NSV metal seated ball valves are specially designed according to actual working services or customer's requirement. It can be used in adverse working services and can meet the bad working services requirement such as high temperature, high pressure, strong corrosion and medium with grain, etc. This series of ball valves can use two type of structure of trunnion mounted or floating ball, the seat is grinded after accurately machined along with the matched ball and forms tight contact with the ball through spring loading to reach to initial seal, the contact between seat and ball is much more tight under the medium pressure at working status with safe reliable seal, long life cycle and easy operation. This kind of valve is widely used in the industries of petrochemical, papermaking, sewage treatment, mines, ocean platform, etc.
Applicable Standard
Design Standard: API 6D, ASME B16.34, API 608, MSS SP-72, BS 5351
Face to Face: ASME B16.10, API 6D, EN 558
End Flange: ASME B16.5, DIN 2501
Buttwelding Ends: ASME B16.25
Inspection and Test: API 598, API 6D
Products Range
Size: 1/2" ~ 24" (DN15 ~ DN600)
Rating: 150lb ~ 1500LB
Body Material: Carbon Steel, Stainless Steel, Alloy Steel, Duplex Stainless Steel
Trim Material: Nitriding, TC, STL and Nickel Alloy
Operation : Lever, Gear, Electric, Pneumatic, Hydraulic
Design Features
Full port or reduced port
Floating ball or trunnion ball
Metal to metal seated
Blowout-proof stem
Fire safe design to API 607 / API 6FA
Anti-static to BS 5351
Cavity pressure self relief
Double seats with spring loading
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