Top Entry Ball Valves

Top Entry Ball Valves are heavy-duty industrial valves characterized by a single-piece cast or forged body featuring a bolted top bonnet flange. By removing the top bonnet cover, technicians can extract the ball, seat rings, and stem directly while the valve body remains permanently welded or bolted into the pipeline, making Top Entry Ball Valves the premier choice for nuclear power, offshore platforms, subsea manifolds, and buried pipelines.

Zeron Fastners manufactures API 6D certified Top Entry Ball Valves engineered for extreme operating environments from cryogenic (-196°C) to high-temperature (up to 550°C). Featuring self-relieving spring-loaded seats, emergency sealant injection ports, and full-bore passage for unrestricted pipeline pigging operations.

Top Entry Ball Valves Suppliers Manufacturer India

Technical Specifications

Specification Feature Details & Standard Compliance
Design Standards API 6D, ASME B16.34, ISO 14313, BS 5351
Size Range 2" to 36" (DN50 - DN900)
Pressure Ratings Class 150#, 300#, 600#, 900#, 1500#, 2500#
Body Construction One-Piece Monoblock Cast or Forged Body with Bolted Top Bonnet
End Connections Butt Weld (BW), Flanged (RF, RTJ) to ASME B16.5 / B16.47
Maintenance Feature 100% In-line maintainable trim without removing body from pipeline
Body Materials ASTM A216 WCB, A350 LF2, A351 CF8M, Duplex 2205, Inconel 625, Titanium
Seats & Seals Metal-to-Metal Tungsten Carbide Coated OR High-Performance Polymers (PEEK, Devlon)
Pigging Capability Full Bore circular passage fully piggable in both flow directions
Testing Standard API 6D, API 598, ISO 5208

Top Entry Ball Valve Configurations

Type & Model Key Features & Operating Applications
Cryogenic Top Entry Ball Valves Extended bonnet column isolating stem packing from LNG and liquid nitrogen cryogenic temperatures.
High-Temperature Metal-Seated Valves Laser-clad hardfacing with Inconel bellows energizing the seats for high-heat refining.
Underground Buried Service Valves Welded extension stems and grease lines for buried cross-country pipeline networks.
Subsea Top Entry Ball Valves Hyperbaric tested valves with ROV gear operators for deepwater oil and gas extraction.

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