Incoloy 2 Piece Ball Valve Manufacturer in Africa

Corrosive chemical lines and elevated-temperature systems can damage ordinary valve bodies around the stem bore, seat pockets and body cavity. A two-piece Incoloy design provides compact quarter-turn isolation while allowing the material grade to match the actual process duty. African Valve is a top Incoloy 2 Piece Ball Valve Manufacturer in Africa, supplying valves for projects in South Africa, Nigeria, Egypt, Angola and other African markets.

Choosing the Correct Incoloy Grade

Incoloy is actually an alloy that consists of a nickel-iron-chromium series rather than a specific alloy. The three types are mostly chosen due to their resistance to high temperatures oxidation and strength. Incoloy 825, on the other hand, is normally used due to its resistant properties to chemicals, acids and chlorides. These alloys cannot be mixed up due to their similar names. Fluid composition, pressures, temperatures, sulfur contents, chlorides and cleaners have to be checked first.

Two-Piece Body and Ball Operation

The valve is built from a main body and a separate end section that retain the ball, seats and stem assembly. This arrangement keeps the construction compact. Internal servicing normally requires removal of the complete valve, so enough access should be provided around the body and operator. The stem rotates the ball through 90 degrees. When the port aligns with the pipe, the valve is open. Turning the solid side across the flow brings it into contact with the seats and provides shutoff. Full-bore construction supports flushing and lower pressure loss, while reduced-bore construction gives a smaller valve where a narrower passage is acceptable.

Body, Ball and Seat Materials

• Body and end section: Incoloy 825 may be used for corrosive liquid service, while Incoloy 800, 800H or 800HT may suit approved high-temperature duties.

• Ball and stem: These parts should use the specified Incoloy grade or another documented compatible alloy.

• Seat retainers and gland parts: Process-exposed components should not be downgraded to a lower alloy without a corrosion review.

• Soft seats: PTFE and RPTFE suit many clean chemical services, while PEEK provides better load resistance at higher pressure or temperature.

• Metal seats: These are considered for abrasive media, elevated temperature or frequent cycling.

• Optional construction: A blowout-resistant stem, anti-static continuity, cavity-pressure relief and ISO 5211 mounting may be included.

Technical Specifications

• Size Range: DN15 to DN300
  
• Pressure Ratings: ASME Class 150 to Class 900
  
• Design Standards: API 608, ISO 17292 and ASME B16.34
  
• Testing Standard: API 598
  
• End Connections: Flanged RF/RTJ, threaded, socket weld or butt weld
  
• Operation: Lever, gearbox, pneumatic actuator or electric actuator
  
• Body Material: Incoloy 800, 800H, 800HT, 825 or project-specified grade
  
• Body Construction: Two-piece
  
• Bore Type: Full bore or reduced bore
  
• Seat Options: PTFE, RPTFE, PEEK or metal seat
  
• Actuator Mounting: ISO 5211 where specified

Pressure and Temperature Checks

The pressure-temperature rating depends on the complete valve assembly, including the body, seats, packing and bolting. Actuator torque should be calculated from differential pressure, seat friction and operating temperature. Where fluid can become trapped in the body cavity and heat after isolation, a documented pressure-relief path should be considered. The valve is mainly intended for isolation because prolonged throttling can damage the seat edge and ball port.

Industrial Applications

• Acid-processing and chemical-transfer systems

• Refinery process and utility lines

• Pollution-control and gas-treatment equipment

• Offshore and marine chemical systems

• High-temperature gas and thermal-process lines

• Chloride-bearing service where Incoloy 825 is suitable

Manufacturing and Inspection

Material Test Certificates and PMI confirm the selected alloy for the body, ball and stem. Dimensional inspection checks the bore, body joint and end connections. Hydrostatic shell and seat-leakage tests verify pressure containment and shutoff. NDT and operating-torque verification may be added where required.

Project Supply Across Africa

African Valve manufactures Incoloy 2 Piece Ball Valves for chemical, refinery and high-temperature projects across Africa. The enquiry should include the exact Incoloy grade, fluid chemistry, pressure, temperature, bore, seat material, end connection, actuator and inspection scope.