Imported nitrogen relief valve
Overview of imported nitrogen relief valve products
The US YLOK imported nitrogen valve (imported nitrogen sealing valve device, imported nitrogen supply valve) is a self-operated micro-pressure control system developed and developed independently, which is mainly used to maintain the protective gas (usually nitrogen) on the top of the container The pressure is constant to avoid direct contact between the material in the container and the air, prevent the material from volatilization and oxidation, and the safety of the container. It is especially suitable for the gas seal protection system of various large storage tanks. The product has the characteristics of energy saving, sensitive action, reliable operation, convenient operation and maintenance, etc. It is widely used in petroleum and chemical industries.
Features
No additional energy is needed, and it can work in the absence of electricity and gas, which is convenient, saves energy and reduces costs; the pressure setting of the nitrogen discharge valve is convenient and can be carried out under continuous production conditions; the effective area of the pressure detection diaphragm Large, the setting spring stiffness is small, the action is sensitive, and the device works smoothly; it adopts a packing-free design, the friction on the valve stem is small, the response is fast, and the control accuracy is high; to ensure the safety of the storage tank, a breathing valve must be installed on the top of the tank. The breathing valve only serves a safety function, avoiding the frequent opening and closing of the conventional nitrogen sealing device that is easily damaged.
Structure and working principle
The nitrogen sealing device is composed of a nitrogen sealing valve and a nitrogen drain valve. The nitrogen sealing valve is composed of a pilot and a main valve; the nitrogen relief valve is composed of a pressure-opening micro-pressure regulating valve with internal feedback. The nitrogen pressure is generally set to 100mmH20, which is precisely controlled by a nitrogen sealing device.
When the liquid inlet valve of the storage tank is opened and materials are added to the tank, the liquid level rises, the volume of the gas phase part decreases, and the pressure rises. When the pressure in the tank rises above the set value of the nitrogen discharge valve pressure, the nitrogen discharge valve opens. Nitrogen is released to the outside, so that the pressure in the tank drops, and when it drops to the set point of the nitrogen relief valve, the nitrogen relief valve is automatically closed. When the outlet valve of the storage tank is opened and the user discharges the material, the liquid level drops, the volume of the gas phase part increases, the pressure in the tank decreases, the nitrogen sealing valve opens, and nitrogen is injected into the tank to increase the pressure in the tank. When the pressure in the tank rises When the pressure setting value of the nitrogen sealing valve is reached, it will automatically close.
Some technical parameters and data of the imported nitrogen release device (for more information and detailed parameters, please call to obtain)
Nominal diameter: DN10-DN100
Nominal pressure: PN16, PN25 or ANSI150LB
Flow characteristics: quick opening
Pressure adjustment range (kPa): 0.4～5.5, 5～10, 9～14, 13～19, 18～24, 22～28, 27～33, 31～38, 36～44, 42～51, 49～58 , 56～66
Medium temperature (℃) ≤80
Adjustment accuracy (%) ≤5%
Allowable leakage level Standard level: Level IV (GB/T4213-92) Strict type: Level VI (GB/T4213-92)
Material of main parts:
Valve body: ZG230-450, ZG1Cr18Ni9Ti
Valve trim: 1Cr18Ni9Ti
Membrane cover: A3, 1Cr18Ni9Ti
Diaphragm: clip reinforced polyester fabric rubber, fluorine rubber
Spring: 60Si2Mn, 1Cr18Ni9Ti
According to user requirements, the valve body, valve trim, and membrane cover can be made of other grades of material.
Connection size and standard
Connection method: flange, thread, welding
Flange face distance: GB12221-89
Flange standard: GB/T9113-2000
Flange surface type: RF
Actuator gas signal interface: M16×1.5

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Continuously improving the quality of services and keeping improving, "sincere service" is the eternal theme of KUNAG. Kunag strictly complies with the requirements of ISO9001-2000 quality system certification, strictly controls the quality and responsibilities to the people to ensure the healthy operation of production, sales and service. To strengthen communication with customers and to provide our customers with quality products and perfect service, we hereby make the following commitments:
Product Standards
Products are designed, manufactured, and inspected strictly in accordance with China\'s GB, HG standards, and US API standards. The hardness of the sealing surface meets the national requirements and the width exceeds the national standard.
pre-sale service
Product introduction, technical communication, non-standard product design, troubleshooting.
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After sales service
The warranty period of Weitong products is 12 months from the factory, and the "three guarantees" service (return, replacement, repair) is implemented.
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For after-sales service, users are required to fill in the quality feedback form after the service and make appraisal opinions, while improving Guardian\'s service quality.

Order process
Landline: 021-59718851 (AM-8: 30 to PM-17: 30)
Mobile phone: 18918462396 (WeChat same number 24-hour service)

QQ: 2030185432

Email: kunage@126.com
Receive customer purchase list, provide customers with valve model selection and quotation (price list).
Specific agreement: delivery time, special requirements, etc.
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Customers have special requirements for products, and must provide the following instructions in the order contract:
(1) Structure length;
(2) Connection form;
(3) Nominal diameter, full diameter, reduced diameter, pipe size;
(4) Operating medium, temperature and pressure range;
(5) Experiment, inspection standards and other requirements;
(6) Various driving devices can be configured in this field according to the special requirements of customers;
If the determined valve type and model are provided by the customer, the customer should correctly explain the meaning and requirements of its model, and sign the contract under the conditions that the supply and demand sides understand and agree.

Contact: Peng gong
Q Q: 2030185432
Mobile: 18918462396(WeChat same number - 24 hours service)
Landline: 021-59718851
E-mail :kunage@126.com