Our trunnion mounted top entry art. 55 ball valves are engineered to meet international standards like API 6A, API 6D, ASME B16.34, ISO 17292 and others upon request. The range contains both soft, metal or composite seats that can be configured with single or double piston effect. One piece body manufactured from casting or forging.
Za.Ve.Ro Trunnion mounted API 6A/API 6D ball Valves are 3 pieces, or split body execution, self relieving spring energized seats, suitable for double block and bleed performance. Seats are available in lubricated or not lubricated execution with different solutions of sealng and fire safe back up gaskets (Soft or metal seated). Stem is blowout proof and provided with emergency sealant injectors to avoid leakage in case of sealing interruption. Antistatic device is also provided. Valves can be complete with lifting lugs and ground feed to facilitate transportation and in line installation.
Subsea ball valves can be manufactured in bolted body or welded body execution. Bolted valves are provided with a double body to closure sealing. The first sealing is to not permit to the sea water to get into the valve. A special sealing is applied to insulate completely the process fluid to the environment. (Special gearboxes or ROV receptacles are installed to be operated at the highest water depths.)
Available from 1/4” to 6”; ANSI 150 – 2500; RF-BW ends; Side entry, split body (2 or 3 pieces), Lever, gear, pneumatic, hydraulic or electric motor operated; Soft seated or metal-to-metal seated.
Cryogenic valves are designed to operate at temperature down to -196°C.All metallic parts are manufactured in stainless set, while the soft parts are realized in proper special materials suitable for this so severe application. Normally, the seats are in poliChloro-Tri-Fluoro-Ethylene (PCTFE-Kel-F®) and PTFE lip seals insures the sealing of all dynamic components. Valve banned is extended to keep a vapor room, to avoid the contact of liquid cryogenic media to the gland.
Double block & bleed
Double block and bleed valve is a combination of two bleed valve is a combination of two ball valves with a needle valve between. That design type allows to have an integral compact body and short face to face dimension. You can have different solutions and different valve ends, as per customer request.
Underground ball valves are usually provided in fully welded body execution with butt welding ends. For this application valves are provided with an extended stem; drain, vent and emergency sealant lines are fitted at the top of the extension.