Nitrogen supply valve (with commander self regulating valve)

The nitrogen supply valve is a self operated micro pressure control system mainly used to maintain a constant pressure of the protective gas (usually nitrogen) at the top of the container, prevent direct contact between the materials inside the container and air, avoid volatilization and oxidation, and ensure the safety of the container. Its working principle is based on the change in nitrogen pressure inside the storage tank: when the liquid level drops and the pressure inside the tank decreases, the nitrogen supply valve automatically opens, injecting nitrogen to increase the pressure; When the pressure reaches the set value, the nitrogen supply valve automatically closes. The nitrogen supply valve is mainly composed of a valve body, a valve seat, a valve core, a spring, a sealing ring, etc. It uses the energy of the regulated medium (nitrogen) as a power source and can achieve automatic control without the need for external energy. The actuator usually adopts a thin film actuator (self operated), which can automatically open or close according to changes in the pressure inside the tank.

The following is the detailed working principle and structural composition of the nitrogen supply valve:

working principle

When the liquid outlet valve of the storage tank is opened and the user releases the material, the liquid level drops, the volume of the gas phase increases, the nitrogen pressure inside the tank decreases, and the nitrogen supply valve opens to inject nitrogen into the storage tank. The nitrogen pressure inside the tank increases. When the pressure inside the tank rises to the set value of the nitrogen supply valve, the nitrogen supply valve automatically closes.

structural composition

The nitrogen supply valve is mainly composed of a valve body, a valve seat, a valve core, a spring, a sealing ring, etc. The actuator usually adopts a membrane type actuator (self operated), which can automatically open or close according to changes in the pressure inside the tank.

Nitrogen supply valves have the advantages of energy saving, sensitive action, reliable operation, convenient operation and maintenance, and high control accuracy. They are widely used in chemical, food, pharmaceutical and other fields, such as nitrogen seals for chemical storage tanks, ultrapure water, edible oil, thermal oil tanks and other nitrogen seal protection systems that require air isolation

Ordering Instructions

Name and model of regulating valve

Nominal pressure Mpa

Nominal diameter (mm)

Rated flow coefficient (Kv)

Inherent flow characteristics

medium name

Working temperature and range

Operation mode of the whole machine

Pressure set point and adjustment range

Valve body, valve internals, and packing materials

Attached attachments

Other special requirements