Body type: Straight casting valve
Nominal diameter: DN20~150mm; NPS 3/4″~6″
Nominal pressure: PN1.0~1.6MPa
Applicable temperature: -30~150℃
Type of connection: Flange
Flange distance: According to IEC 60534
Serial self-operated nitrogen seal control valve of TangoValve Group is mainly composed of several parts including actuated valve, actuator, director, and pressure spring. It is utilized to maintain constant pressure of protective gas (generally nitrogen) on the top of containers for avoiding direct contacts of containers and materials, preventing materials from volatilizing and being oxidized, and ensuring container safety. It applies to air seal protection systems of all kinds of large-scaled storage tanks.
When pressure in a storage tank increases to setting pressure, quick relief valve should be unlocked instantly to release excess pressure in this tank. Valve of micro pressure regulating valve requires to be opened to fill the tank with nitrogen if pressure decay occurs in it. On the condition that micro pressure regulating valve must be used below 0.1MPa while the field pressure is relatively high, it can’t be used until pressure is reduced below 0.1MPa by installed V230Y pressure regulating valve. The nominal pressure is 0.1MPa, and the pressure can be set in sections, from 0.5kPa to below 66kPa, and the medium temperature is ≤80°C.
| Nominal Diameter DN (mm) / NPS (in) | 20 (3/4″) | 25 (1″) | 40 (1-1/2″) | 50 (2″) | 80 (3″) | 100 (4″) | 150 (6″) |
| Valve Seat Diameter (mm) | 6 | 15 | 25 | 32 | 50 | 80 | 150 |
| Rated Flow Coefficient Kv | 3.2 | 5 | 10 | 20 | 80 | 160 | 400 |
| Pressure Regulating Range (KPa) | 0.4~0.5, 5~10, 9~14, 13~19, 18~24, 22~28, 27~33, 36~44, 42~51, 49~58, 56~66 | ||||||
| Nominal Pressure (MPa) | 1.0, 1.6(MPa) | ||||||
| Applicable Temperature | -30~150℃ | ||||||
| Flow Characteristics | Quick Opening Characteristic | ||||||
| Adjustment Precision | ≤5% | ||||||
| Allowable Pressure Drop (MPa) | 1.6 | 1.6 | 1.1 | 0.6 | 0.4 | ||
| Effective Area of Film (cm²) | 200 | 280 | 400 | ||||
| Leakage Level | ASME B16.104 V (Soft Seal), ASME B16.104 IV (Hard Seal) | ||||||
| Type of Body | Straight Casting Valve | ||||||
| Plug Form | Top Guide Balance Inner Part, Pilot Structure | ||||||
| Connection Mode | Flange Type | ||||||
Self-Operated Nitrogen Seal Control Valves are designed to maintain a consistent nitrogen blanket over the liquid in storage tanks. They are widely used in industries requiring inert gas blanketing to prevent oxidation, contamination, or evaporation of sensitive liquids. Key applications include:
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