China Ldh Nitrogen Production Equipment Price Air Compressor Pry

Product Description

LDH GAS Bovine sperm freezing liquid nitrogen generator


Company introduction

LDH GAS is a high-tech GAS company. We have been engaged in the development and production of GAS and liquid nitrogen products for more than 10 years. The core technical personnel of the company are composed of technical personnel from Peking University and Chinese Academy of Sciences, which has absolute advantages in technology. Our products are mainly: high purity nitrogen generator (99-99.9995%), high purity oxygen generator (90-99.5%) liquid nitrogen generator (95-99.9995%). The products are mainly used in industry, medical, laboratory research, cell research, biological science and so on. Our liquid nitrogen products have been sold to the United States, Peru, Southeast Asian countries, Germany, HangZhou, China, and are used stably at an altitude of 4500 meters
LDH GAS Bovine sperm freezing liquid nitrogen generator

1. Capacity from 3L/h to 50L/h. Meet all your requirements.
2. Low power consumption.
3. Automatic operate. One key start.
4. Small floor space.
5. Durable. Can work 24 hours per day.
6. One station of liquid nitrogen generator manufacture. ( we supply liquid nitrogen generator, vacuum tube and liquid nitrogen dewar.)



LDH Liquid nitrogen generator models and technical sheet:

NO. LN80-A LN120-A LN240-W LN500-W LN720-W LN1000-W LN1200-W
Capacity(L/day) 80 120 240 500 720 1000 1200
Capacity (L/h) 3 5 10 20 30 40 50
Power(kW) 8 9 11 20 25 35 40
purity(99%~99.999%) 99.9% 99.9% 99.9% 99.9% 99.9% 99.9% 99.9%
Outlet (MPaG) ≥0.8 ≥0.8 ≥0.8 ≥0.8 ≥1.6 ≥0.8 ≥1.6
Power supply 380/50Hz 380/50Hz 380/50Hz 380/50Hz 380/50Hz 380/50Hz 380/50Hz
Cooling air air water water water water water
Water cooling(m3/h) ≥4 ≥8 ≥12 ≥15 ≥20

LDH is 1 of the professional liquid nirogen generator manufacturer ,we can offer all modes of liquid nitrogen generators.
From 3L/hr to 50L/hr ,purity 95% to 99.999% 
We can offer 1 full system also can offer the parts of equipment as your need.
Any need welcome contact us,get more information 

LDH Liquid nitrogen generator drawing 

working principle


Mixed-refrigerant Joule-Thomson (MRJT) refrigerator at low temperature ranges driven by
single compressor with precooling is applied to liquefy nitrogen (-180ºC) for Nitrogen Liquefier
from TIPC, CAS. MRJT, a Joule-Thomson cycle based on reoccupation and multicomponent
mixed-refrigerants through optimizing various refrigerants with different boiling points
with a good match along with their respective efficient refrigeration temperature ranges,
is an efficient refrigerator for the temperature range from -40 to -196ºC.
The feature of this product is as following: the available mature commercial compressors
and heat exchanges, high liquefaction efficiency, high reliability, no maintenance and long life.



LDH LN2 Generatior applications 

Mainly in universities, scientific research laboratories, the advantage is that the independent
production of liquid nitrogen, with the production, no need to go far to purchase liquid nitrogen dew-pot, improve the convenience of use.

Output is customized from 1 litre to 50 liters per hour. Depending on the user’s usage.

Convenient compact, easy to move, low energy consumption.

During the use of the equipment, it can realize one-button startup and one-button shutdown with a high degree of automation. Generally, it can be achieved after simple training and does not require too much professional knowledge and skills.



In industrial production, liquid nitrogen obtained by compressed liquid air fractionation can be used as deep refrigerant. Because of its chemical inertia, it can directly contact with biological tissue and CZPT immediately without destroying biological activity, so it can be used as deep refrigerant

(1) Rapidly freezing and transporting food, or making ice products;

(2) Research on low temperature physics;

(3) Demonstrate the low temperature state in science education. At room temperature, a soft object soaked in liquid nitrogen will be as brittle as glass;

(4) Provides the temperature required for high temperature superconductors to show superconductivity.

(5) It can be used as refrigerant to quickly CZPT biological tissue to prevent tissue damage.

(6) It is used for industrial nitrogenous fertilizer.

(7) For chemical detection.
Uses of Liquid Nitrogen
Storage of sperm, eggs and other cellular materials
Beverage industry (coca cola ,juice bottling )
Glass industry
Freezing seafood
Nitrogen refinery
Tunnel freezin

Liquid nitrogen is a liquid with a low temperature of – 196 ºC and is obtained from nitrogen which occupies more than 70% of the air. Inert, colorless, non-toxic, volatile, very wide range of use. Liquid nitrogen is easy to volatilize at low temperature, so it is generally stored in a special container liquid nitrogen tank.

According to the use of liquid nitrogen purity classification, often divided into food grade liquid nitrogen, industrial grade liquid nitrogen. The purity of food grade liquid nitrogen is high, because considering the safety of human consumption, the purity reaches 5 9, that is 99.999%. The purity of industrial grade liquid nitrogen is not as high as that of food grade liquid nitrogen.

In the process of using liquid nitrogen, people often think that the safety is not good, but because of the low temperature of liquid nitrogen, it will gasify immediately when it meets air, so the safety is still guaranteed. Just pay a little attention to safety, and there should be safety awareness in any case.

Performance requirements

Liquid nitrogen production: 1-50L / h
Storage capacity: 120L, environment: 10 ºC – 38 ºC
Control: PLC touch screen, power: 200v-400v, 3P, 50 / 60Hz

Applications of Nitrogen
Nitrogen is very important gas for various industries including chemical where it is used for making fertilizers, nitric acid, nylon, dyes, and explosives. Being known for its inerting properties, nitrogen is ideal for preservation of food and making of diodes and transistors. The non-reactive gas is used on a large scale in annealing stainless steel and various other products used in the generation of steel. Annealing is a heat treatment that making it easier to work on steel. It is used for freezing foods and helping them to maintain texture, flavor, color and moisture. Numerous other applications include:

Liquid Nitrogen is used in many applications because of its very low temperature and low reactivity. Some of the common applications are:

It is used in cryo therapy to remove skin abnormalities
Serves as a source of an extremely dry gas
Freezing and transporting of food products
Cooling of superconductors like vacuum pumps, and other equipment
Cryo preservation of blood
Cryo preservation of biological samples like eggs, sperms, and animal genetic samples.
Preserving of animal’s semen
Branding of cattle
Cryosurgery (removing dead cells from the brain)
Quick freezing of water or pipes to let workers work on them when valves are not available.
Protects materials from oxidization.
The shielding of materials from oxygen exposure.
Other applications that include creating Nitrogen fog, making ice-cream, flash-freezing, flowering that shatters when tapped CZPT a hard surface.
If you require Liquid Nitrogen plant for your application, our team can CZPT you the best

Liquid nitrogen is a colorless, odorless, non-flammable, non-corrosive and extremely cold element that finds a lot of applications including research and development.

Liquid Nitrogen Liquefaction :

Liquid Nitrogen Plant (LNP) draws out Nitrogen gas from the atmospheric air and then liquefies it with the help of Cryo cooler.

There are 2 methods through which Nitrogen can be liquefied:

Pressure Swing Adsorption with Cryo generator.
Distillation of liquid air.
Working principle of Liquid Nitrogen Plant

In a Liquid Nitrogen plant, the atmospheric air is first compressed to 7 bar pressure into compressor. This high temperature compressed air is then cooled in  the external refrigeration system.  Then, the cooled compressed air is passed through moisture separator to trap the moisture from the air. This dry compressed air is then passed through a bed of carbon molecular sieves where Nitrogen and Oxygen are separated from the air. Separated Nitrogen is then allowed to get through Cryo cooler which cools the gaseous Nitrogen to a liquid state at the boiling point of Nitrogen (77.2 Kelvin). Finally, the Liquid Nitrogen gets collected in Dewar’s vessel where it gets stored for several industrial purposes.

The spectrum of nuclear magnetic resonance spectrum through different nuclear spectrum peaks, chemical shift value, multiplicity, coupling constant value, the relative intensity of peaks and present in all kinds of two-dimensional spectrum and multidimensional spectrum of the correlation peak, species, number of atoms in molecules, space form, the connecting way of atoms, the structure of the relative orientation of qualitative information.

Quantitative NMR analysis is based on structural analysis, using the relationship between the proton number of a specific group of molecules and the CZPT area of the corresponding spectrum. NMR spectroscopy is mainly used to determine the structure of small organic compounds and biological macromolecules in solution. It is widely used in chemistry, biology, physics, materials, pharmacy and medicine

Superconducting magnets are immersed in liquid helium, which is coated with liquid nitrogen. The role of liquid helium is to maintain superconductivity of the magnet to provide the desired magnetic field environment, and liquid nitrogen is to add a “temperature barrier” between liquid helium and the outside environment to reduce the evaporation of liquid helium.

After Sales Service

1, all products provide 1-year warranty, online guidance installation and debugging, installation and debugging video materials, all products to establish files, for years to provide a more convenient guarantee.
2. All products shall be tested on the machine before leaving the factory, and only after CZPT the standard can they leave the factory.

How to Repair and Maintain an Air Compressor

A compressor is a device used to move air from 1 place to another. Air enters the air compressor through the intake valve. Inside the compressor, the vanes on the inner rotor rotate within an eccentric cavity. The self-adjusting length arm divides the space into multiple cavities of different sizes. As the rotor rotates, air fills the cavity. As air flows around the cavity, it builds pressure and is squeezed out of the compressor output.

Positive displacement

Positive displacement air compressors use reciprocating pistons to compress air. Gas is drawn in during the suction stroke and compressed by moving the piston in the opposite direction. It then discharges the compressed air by moving it in the opposite direction. This type of air compressor is most commonly found in automobiles, refrigerators, and other applications that require high pressure. However, it is not as efficient as a centrifugal compressor.
Most modern air compressors use positive displacement. Positive displacement models capture a volume of air in the compression chamber and distribute it when the pump is operating at maximum capacity. They are more economical than their negative displacement counterparts. Reciprocating screw air compressors are the most common positive displacement compressors. The reciprocating screw air compressor adopts a water jacket around the cylinder and is often used in processes such as oil drilling.
A bicycle pump is an example of positive displacement compression. Air is drawn into the cylinder and compressed by the moving piston. A piston compressor works on the same principle, but it uses a rotating crankshaft or connecting rod to complete the movement of the pistons. There are 2 types of positive displacement compressors: single-acting and double-acting. Both types work on the same principle, both are positive displacement compressors. The difference between the 2 types is the pressure ratio.
In air compression, positive displacement compression reduces the volume of the fluid and reduces its viscosity. This results in higher pressure ratios and is used in centrifugal, axial, and scroll compressors. Positive displacement is a common feature of most air compressors. Positive displacement compressors offer the same benefits and are more energy-efficient when applied to oil-free and gas applications. This type of compression is usually the best choice for low-pressure applications.

oil free

If you’re looking for an air compressor for your business, consider an oil-free air compressor. These models offer cleaner, quieter operation than traditional air compressors and require less maintenance. They also meet ISO Class 0 or Class 1 air purity requirements. Oil-free air compressors are also quieter, with fewer moving parts and less noise. These advantages make oil-free air compressors an ideal solution for many commercial applications.
Air purity is critical in many industries. Even the tiniest drop of oil can damage production equipment or damage products. The best way to find an oil-free air compressor for your business is to consider the process and end product. As air quality improves, more and more businesses are turning to oil-free compressors. Some of the advantages and disadvantages of these air compressors are:
When choosing an oil-free air compressor, it is important to understand the terminology used in the industry. Knowing these terms will make it easier for you to choose the right compressor for your needs. ACTFM, or actual cubic feet per minute, is an industry term for measuring the amount of air pumped in 1 minute under rated conditions. Although a simple number, it can be very useful in determining which type of air compressor is best for your application.
The ISO 8573-1 international standard defines air quality and provides air purity classifications. The strictest classification is air purity class 0. Many manufacturers claim that oil-free air compressors meet this standard. However, a class 0 oil-free air compressor does not necessarily mean that the air is free of contaminants. In fact, Class 0 is the benchmark for air purity. While zero air quality is the highest level, that doesn’t mean it’s completely oil-free.

double acting

A double-acting air compressor is a device that uses compressed air to generate electricity. Its working principle is based on piston and connecting rod. The connecting rod connects the crankshaft to the piston through pins and caps. The piston moves as the piston moves. Rods are usually made of forged carbon steel. In terms of service and maintenance, double-acting compressors require regular vise maintenance and proper cleaning.
The displacement of the compressor is a measure of the displacement that the piston can produce in a certain period of time. Displacement is usually expressed in actual cubic feet per minute. The exact calculation depends on the type of cylinder and the configuration of the compressor. Single-acting cylinders can have head-end or crank-end displacement, both of which can be measured using the displacement equation. A double-acting air compressor will use this equation. 4 and 6 calculate the displacement.
Double-acting air compressors have multiple cylinders and are made of cast iron. They are water-cooled and have a mechanical connection between the piston and connecting rod. A double-acting compressor compresses air twice per revolution of the motor. One cylinder moves up, while the other cylinder moves down. The piston moves down, allowing air to enter through valve #1. During the operation of the compressor, the temperature of the air and gas increases.
Double-acting air compressors typically have high pressure and are considered workhorses. Double-acting compressors also feature intercooling and double compression. As a result, these machines tend to last longer than single-acting compressors. Its low speed and dual compression make it a workhorse in the compressor industry. Double-acting air compressors are workhorses and versatile devices.

fuel tank pressure switch

You can adjust the pressure in the air compressor tank by adjusting the differential pressure. You can turn the mainspring clockwise or counterclockwise to increase or decrease the pressure. This valve will open when the pressure is low enough to start the compressor. If the pressure is too low, the valve should be closed. The cut-in and cut-out pressures should be set to appropriate values. After adjusting the tank pressure, check the hysteresis of the tank pressure switch and set the desired shutoff pressure.
If the pressure in the tank falls below the cut-in level, the tank pressure switch must be replaced. You can test the switch with a multimeter. Make sure the switch is not damaged. If you can’t find the switch, you can look at the other sections. If you find any damaged or missing parts, you should replace them. Otherwise, it may be time to check the tank pressure switch. You may need to disassemble the compressor and remove the switch.
The fuel tank pressure switch is an important part of the air compressor. It keeps you informed of the amount of air delivered by the compressor. If your tank or tank is damaged, your readings will be wrong. If the pressure switch is damaged, it will not function properly and result in incorrect readings. Fortunately, there are some easy ways to fix this. To prevent this from happening, keep the tank pressure switch in good condition.
When the air pressure in the tank drops to the cut-in pressure setting, the switch allows power to flow through it. This will start the motor and pump of the air compressor. Then, if the pressure in the tank rises above the cut-off level, the switch will trip and stop the compressor. This will prevent it from being over-pressurized. Power flow will continue to flow to the motor. Depending on your compressor model, you can change the cut-in and cut-out pressures as needed.

energy source

The power supply of the air compressor is very important. Most air compressors run on 12 VDC, which is ideal for automotive use. Alternatively, you can buy a switching power supply for around $20. No matter which power supply you choose, you must ensure that it can support the maximum current of the compressor. You can find power supplies in all sizes, from quarter-horsepower to five-horsepower.
The voltage required for a three-phase air compressor will vary. Three-phase air compressors require 3 separate power cords and a three-phase electrical service panel. This is because a standard 120/240-volt electrical service panel is not sufficient to power a three-phase compressor. Additionally, three-phase compressors require 3 separate isolated wires for the engine and motor circuits. Three-phase compressors do not require a neutral wire.

China Ldh Nitrogen Production Equipment Price Air Compressor Pry  China Ldh Nitrogen Production Equipment Price Air Compressor Pry

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