2 Piece Ball Valve, ASME B16.34, ASTM A351 CF8, 3 IN, 150 LB

Product Name: 2 Piece Ball Valve
Design Standard: ASME B16.34
Body Material: ASTM A351 CF8
Size: 3 Inch, DN80
Pressure: Class 150 LB, PN20
End: Flanged
Operation: Lever
Features: Full Port, Investment casting, Anti-static device, Blow-out proof stem

Product Range

Nominal Diameter: DN15-DN150
Working Pressure: ANSI Class 150/300 LB
Working Temperature: -20°C to 180°C
Design Standard: ASME B16.34
Body Material: ASTM A216 WCB, A351 CF8, CF8M
Flange Dimensions: ASME B16.5
Face-to-Face Dimensions: ASME B16.10
Inspection & Testing: API 598
Applications: Suitable for petroleum, chemical, natural gas, biochemical, pharmaceutical, environmental protection, and new energy industries

For ball valve packing rings, we exclusively use M641 specialty low-emission packing designed specifically for ball valves.

If conventional graphite packing rings are used in stock inventory, they can strongly adhere to the valve stem over time, leading to excessive operating torque and leakage issues during later use.

By adopting our low-emission packing, even after prolonged storage, the valve maintains:

• Very low operating torque

• Excellent sealing performance

• No adhesion issues

API 622 TUV Experimental Data Report

We have optimized the design of the packing structure for floating ball valves. Based on our field experience in petrochemical applications, we found that traditional designs using O-rings plus packing material may appear more reliable but actually create potential risks.

In conventional designs, the O-ring might become the primary seal while misleading users to believe the graphite packing also functions as a main seal. However, O-rings are vulnerable to chemical corrosion. Once the O-ring fails and the graphite packing is insufficient, both sealing mechanisms may fail, making it impossible to perform secondary pre-tightening on-site.

Additionally, our tests confirmed that insufficient graphite packing consistently fails fire safety tests. Therefore, we optimized the design by removing the O-ring and relying solely on packing as the primary seal. The benefits include 100% fire safety performance, 100% low leakage, and enhanced stem strength.

ISO 15848-1 Type Test Report at 400°C