Production and sales of liquid nitrogen valves, micro regulating valves, and Shuoxiang valves

NegotiableUpdate on 03/01

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Nature of the Manufacturer: Producers

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Overview

Shuoxiang liquid nitrogen valve controls the flow, cut-off, and regulation of liquid nitrogen (-196 ℃) in air separation equipment, low-temperature storage tanks, cold chain logistics, and scientific research experiments; Nitrogen supply valve: controls the transportation, pressure regulation, and switching of gaseous nitrogen, industrial nitrogen production systems, pipeline nitrogen supply, pneumatic equipment, and protective gas systems; Micro pressure regulating valve; Accurate control of small pressures (such as 0~100Pa), laboratory reactors, atmosphere control, ventilation systems, precision instruments

Product Details

Liquid nitrogen valves, nitrogen supply valves, and micro pressure regulating valves produced by ShuoxiangA comprehensive introduction covering product overview, functional features, usage instructions, and maintenance, suitable for industrial, medical, laboratory, and other fields:

1、 Product Overview of Shuoxiang Nitrogen Supply Valve, Nitrogen Relief Valve, and Micro Pressure Regulating Valve

Valve Type	main purpose	Typical application scenarios
Liquid nitrogen valve	Control the flow, cut-off, and regulation of liquid nitrogen (-196 ℃)	Air separation equipment, low-temperature storage tanks, cold chain logistics, scientific research experiments
Nitrogen supply valve	Control the transportation, pressure regulation, and switching of gaseous nitrogen	Industrial nitrogen production system, pipeline nitrogen supply, pneumatic equipment, protective gas system
Micro pressure regulating valve	Accurately control small pressures (such as 0~100Pa)	Laboratory reactor, atmosphere control, ventilation system, precision instruments

2、 Functional Features

1. Liquid nitrogen valve

Ultra low temperature adaptabilityUsing low-temperature materials such as stainless steel and copper alloy to avoid cold brittleness.
Special sealing designUsing sealing structures such as polytetrafluoroethylene (PTFE) and metal bellows to prevent low-temperature leakage.
Anti icing designExtend the valve stem and provide insulation treatment to reduce operational failures caused by external icing.
Quick opening and closingCommonly used for emergency shutdown, compact structure, and rapid response.

2. Nitrogen supply valve

high voltage resistantUsually, the design pressure is ≥ 1.6MPa, and high-pressure models can reach over 10MPa.
high sealing performanceSoft seal (rubber/PTFE) or metal hard seal to ensure zero nitrogen leakage.
Flow regulation functionSome models come with adjustment mechanisms that can stably output pressure.
Strong compatibilitySuitable for pure nitrogen, high-purity nitrogen, and mixed gases.

3. Micro pressure regulating valve

high-precision controlSensitivity can reach ± 1Pa, used for precision pressure regulation.
Voltage stabilization characteristicsAutomatically compensate for pressure fluctuations and maintain stable set values.
Small traffic designSuitable for low flow gas micro pressure control.
Lightweight structureCommonly used brass and stainless steel materials, with small interface sizes (such as 1/8 '~1/4').

3、 Instructions for use

1. Pre-installation preparation

Confirm that the valve material and pressure/temperature rating meet the system requirements.
Check the cleanliness of the pipeline to avoid damage to the sealing surface caused by welding slag and impurities.
Pre cooling is required during the installation of liquid nitrogen valves to avoid rapid cooling shock.

2. Key Operating Points

Valve Type	Operation precautions
Liquid nitrogen valve	1. Slowly open to avoid sudden pressure rise caused by liquid nitrogen vaporization 2. Ensure sealing when closing to prevent "cold leakage" 3. Wear antifreeze gloves/face mask during operation
Nitrogen supply valve	1. Gradually rotate the handwheel when adjusting pressure to avoid flow shock 2. Regularly check the sealing status when opening for a long time 3. The high-voltage system needs to be depressurized before operation
Micro pressure regulating valve	1. First open the front valve, then slowly adjust the target pressure 2. Avoid instantaneous high flow impact on the diaphragm 3. Use a pressure gauge to monitor the output and set it accurately

3. Safety precautions

The liquid nitrogen system needs to be equipped with a safety relief device to prevent overpressure.
Nitrogen environment may cause hypoxia, and the operating area needs ventilation.
Micro pressure valves should be used to avoid overload and prevent accuracy failure.

4、 Maintenance and upkeep

1. routine inspection

Check the valve for external leakage, icing (liquid nitrogen valve), and abnormal noise.
Confirm the flexibility of the adjustment mechanism and whether there is any jamming.
Record pressure/flow data and monitor performance changes.

2. regular maintenance

period	Maintenance content
monthly	Clean the exterior of the valve body and check for loose fasteners
biannually	Check the wear of seals (such as valve seats, valve cores, O-rings)
every year	Comprehensive disassembly and inspection, replacement of vulnerable parts, calibration of micro pressure valve accuracy

3. Common fault handling

Fault phenomenon	Possible reasons	Handling suggestions
Leakage of liquid nitrogen valve	Seal aging, valve body freezing and cracking	Replace the low-temperature seal, repair welding or replace the valve body
Unstable pressure of nitrogen supply valve	Valve core blockage, spring failure	Clean the valve core, replace the spring or adjust the component
Micro pressure valve cannot be adjusted	Damaged membrane and blocked air path	Replace the membrane and blow the pipeline with clean gas

4. Spare Parts Management

Regular sealing kit (gasket, O-ring, valve seat).
It is recommended to reserve corrugated pipe sealing components for liquid nitrogen valves.
Micro pressure valves require spare diaphragms and calibration tools.

5、 Selection suggestions

Liquid nitrogen valvePriority should be given to long necked and vacuum insulated structures, with the recommended material being SS316L.
Nitrogen supply valveAccording to pressure selection, EP grade clean treatment valves are used for high-purity systems.
Micro pressure regulating valvePay attention to sensitivity and repeatability accuracy, and choose the live signal feedback model.