Flanged Valve / ANSI
AF-50M  Metal Seated Ball Valve - Floating or Trunnion

  Design Std. API 6D, API 608, ASME B16.34
Face to Face ASME B16.10
Flange Dimension ANSI B16.5
Testing Std. API 6D, API 598
Pressure Rating Class 150 - 2500
Metal Seat & Ball SS304/SS316+ Nickel alloy
Dimensions  Send Inquiry
6" Class 300 Metal Seated Trunnion Ball Valve
8" Class 300 Metal Seated Trunnion Ball Valve Actuated

1/2" - 4" Class 150 - 300 Metal Seated Floating Ball Valve

AF-50M 2-pc high performance metal  seated ball valve with ISO   mounting  pad is  designed for use in high  temperature, abrasive, and  high pressure media in power  generation,  petrochemical,  mining,  and pulp  &  paper  industries.

To stand out from other economic  valves in  the market,  valve structure & wall thickness is fully comply to ASME B16.34 standard  on Class 150 & 300(PN16/40) construction. The  structure ensures  safety in  the  high performance  application.

Standard material for metal  seat &  ball is Co element (known as Stellite). The Co based material   is  good at hardness, corrosion resistance and stable under high temperature.

The patented  unique split seat design is perfect to seal the leakage from & over the seat  area to meet at  least Class V leakage  class.

AF-50M  metal seated ball valve is uni-directional shutoff as standard.


  • 2-Piece Construction of Superior Performance
  • High Quality Investment Casting
  • Inconel Spring provides better sealing function
  • Blow-out Proof Anti-static Stem for Max. Safety
  • Live Loaded Adjustable Stem Packing
  • ISO 5211 Mounting Pad for Easy Automation
  • Uni-directional design


  • Fire safe design
  • V-Ball for flow control
  • Stem Extension
  • Special Alloy on Body / End cap / Ball / Stem


Design Features:

  •  Advanced Hardening Technology for Ball & Seat

      Metal seated design has been employed perfectly for the ball and seat, which has also adopted the advanced hardening technologies, such as ultra-sonic spray coating, nickel base spray welding, surface specially hardening, Stellite spray welding, ceramic material with high strength and hardness, and so on. Surface hardness of the ball and seat may generally reach more than HRC60, maximum is up to HRC74, and application temperature of the material may be up to 540℃, maximum is 980℃. Combining strength of the material gets to more than 10000 PSI. Besides, the surface materials possess very good resistance properties of friction and impact. Metal seated ball valves are suitable for use in most critical working conditions.

  •  Preventing Valve from Stuck under High Pressure

In the case of high temperature working condition, valve seat and ball get stuck easily due to heat expansion, and cause problem opening valve. Our metal seated ball valves employ the patented design of beveling spring loading, which absorb the heat expansion of parts with the beveling spring. So it ensures that the valve would not get stuck and can be opened and closed easily in the Case of high temperature condition.

  •  Excellent Tightness Function

A unique technique has been employed for the ball grinding, which makes ball surface extreme round and smooth by rotating the ball and grinding apparatus at different directions in space. The tightness function of the valve meets completely and exceeds the standard requirement.

  •  Inherently Fire-safe

Metal to metal sealed structure has been adopted for the valve sealing surface design. Packing is designed with graphite, and gasket is  designed with stainless steel, plus graphite to assure reliable tightness even under fire condition.

  •  Double Block and Bleed

Metal to metal sealed trunnion ball valve is in general of the front ball sealing structure. Actually, two seats of the metal to metal sealed trunnion ball valve can both cut off the medium separately at inlet and outlet to realize double-block function. When the valve is closed, the body cavity and both the bore ends can be blocked with each other even if both ends of the valve are under pressure at the same time. whereas the medium left in the body cavity may relieve through the relief valve. Our metal to metal sealed floating ball valve is of behind ball sealing structure, employing in general single direction tightness. The flow direction is indicated on the valve body. If specially required by customers, our patented bi-direction sealing design may be selected.

Applicable Standards & Specifications:

  • Design and Manufacture : API 6D, API 608, ASME B16.34, MS SP-7S,      BS 5351, BS6364, ANSI/AWWA C507,  BFCI 70-2, ISO 5211
  • Connection Ends : ASME B16.5, B 16.47, API 605, MSS SP-44,              ISO 7005-1, JIS B2238, BS 12627, ASME B16.25, ASME B16.11,            BS 12760
  • Face to Face Dimension : ASME B16.10, ISO 5752, BS558, BS12982
  • Inspection & Testing : API 6D, API 598, API 607/API 6FA, BS6755,        BS 12569, MSS SP-61
  • Nominal Pressure Rating : Class 150 - 2500, JIS 10K - 20K, PN10 - 420
  • Nominal Diameter or Bore : NPS 1/2 - 10, DN 15 - 250
  • Applicable Temperature: -196 C to 540 C
  • Manual, Worm Gear, Pneumatic, or Electrical Operations
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