Industrial valves · Нержавеющий шаровой кран Naval: описание конструкции, принцип действия и примненение

Naval Stainless Steel Ball Valves: Technical Parameters

Technical Characteristics and Design Features of Naval Valves

Naval stainless steel ball valves, supplied by EV Group China, represent high-tech shut-off valves designed for operation in critically important nodes of pipeline systems. The design is based on a precisely machined spherical obturator with a full-bore cross-section, ensuring minimal hydraulic resistance and high-class "A" tightness.

Operational Advantages

  • Corrosion Resistance: The use of high-alloy steel grades guarantees the preservation of structural integrity when in contact with aggressive chemical agents and in conditions of high humidity.
  • Sealing Reliability: The modern geometry of the seals minimizes the risk of leaks, ensuring stable operation in harsh industrial conditions.
  • Reduced Energy Consumption: The full-bore design minimizes pressure losses, which is critical for energy-efficient systems transporting working fluids.
  • Automation: The possibility of installing pneumatic and electric actuators allows for easy integration of these valves into modern APCS (Automated Process Control Systems).
  • Versatility: Optimized sealing materials allow operation with liquid, gaseous, and viscous media.

Classification and Control Types

To ensure design flexibility, EV Group China offers several actuator options for Naval valves:

  • Manual Control: Standard lever system for operational control in local pipeline sections.
  • Pneumatic Actuator: Piston or diaphragm actuators for systems requiring high actuation speed and operation in explosive areas.
  • Electric Actuator: Precision actuators with remote monitoring capabilities for valve status and precise ball positioning.
  • Regulating Modifications: Specialized devices for smooth throttling, preventing water hammer.

Where Applied

These valves are in demand in the petrochemical sector for hydrocarbon transportation, in energy for working with heat carriers, and also in pharmaceutical and food industry enterprises, where requirements for material purity and the absence of corrosion are priorities. Naval valves effectively operate on both main pipelines and in-plant distribution networks.

What to Replace With / Analogues

When it is necessary to select an analogue, one should focus on the tightness class and the chemical composition of the steel (e.g., AISI 304/316). It is important to consider the face-to-face dimension and connection type. When selecting a replacement, pay attention to the possibility of installing an actuator, as not all analogues have standardized flanges for actuators (ISO 5211). It is not recommended to replace stainless steel models with carbon steel analogues in media with high salt or chloride content.

What to Clarify with the Supplier

Before placing an order with EV Group China, we recommend requesting: a certificate of conformity for the specific batch, a product passport indicating the actual steel characteristics, data on the type of seals (EPDM, PTFE) to verify compatibility with your working medium, and drawings with overall dimensions to check fitting locations.