Advanced Technology Valve S.p.A.

Subsea Through Conduit Double Expanding Gate Valve

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The authentic Double Block and Bleed Valve, that grants zero leaks. ATV manufactures a full range of Through Conduit Double Expanding Gate Valves for Offshore & Subsea applications in the Oil & Gas exploration and production, suitable for water depths up to 3000 m (10000 ft).

Through Conduit Double expanding Gate Valves are double block and bleed valves as they can grant zero leak with pressure on the upstream and downstream side towards the body, even when the valve is fully open. Solid particles cannot penetrate into the body, both when the valve is in the open or in the close position. Furthermore, they provide superior bubble tight sealing capabilities and unmatched robustness in harsh services with high pressure and high temperatures. The full bore through conduit design minimizes the turbolence of the flow and when the valve is open the pressure drop is equivalent to that produced by a pipe with the same diameter and length. Moreover, the valve is perfectly suitable for pigging operations.

ATV supplies the through conduit double exanding gate valves in a wide range of materials and configurations to meet any specific need of the application and customer’s requirements.  ATV valves are manufactured with hardfaced sealing surfaces with Tungsten Carbide Coating (TCC). Many optional features are available for seat and stem seals, hardfacings and end connections. Materials are sourced from qualified suppliers on the base of specifications that reflect the industry standards (ASTM, NORSOK, BS, DIN or others), but do also incorporate additional requisitions resulting from long experience.  

The through conduit double expanding gate valves may be manually operated (by ROV or by diver, if feasible) or fitted with linear hydraulic actuators, with or without ROV override. ATV offers the highest level of performance and reliability being its actuators engineered to grant safe and extended operating life. 

ATV designs, manufactures and tests its products in accordance with all the relevant Industry standards and codes (API, ANSI, ASME, DNV, BS, ISO, NACE, PED and others). The double expanding gate valves can be manufactured to conform to API 6A and API 17D product specification level PSL 4 and pressure tested to either API 6A or API 6DSS requirement.

ATV stresses its willingness to produce engineered expanding gate valves; therefore it welcomes requests for special size, class and design requirements.

  • Double block and bleed valve
  • Robust design
  • Suitable for high pressure, high temperature

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