Analytical chromatography

Pneumatic-operated compressor units HII are used in chromatography to supply columns with a movable phase eluent for analysis or separation of mixtures of substances.

The oil-free design of the compressor prevents contamination of pumped gases, which is very important when conducting studies or separating components of especially clean substances.

The high pressure created by the plant allows high and ultra high pressure chromatography. The absence of an electric drive ensures fire and explosion safety, makes it possible to work with combustible gases.

Compressor units are used in laboratory and preparation chromatographs.

• Drive type: pneumatic, electric (built-in supply compressor);
• Pressure range from 10 to 2000 atm (1-200 MPa);
• Compressor element type classification: oil-free - does not contaminate pumped gas;
• Minimum inlet pressure is determined by the compressor element model, but not less than 3 atm;
• The maximum inlet pressure is determined by the compressor element model, typically equal to the maximum discharge pressure;
• Maximum performance depends on the number and type of compressors and the mode of operation;
• Drive power supply: industrial air, nitrogen 5-10 atm (0.5-1.0 MPa);
• Special versions of drives: power supply from associated petroleum gas, methane, electric drive;
• Pressure control: smooth, stepless, medium/high precision, in a wide range of operating pressures;
• Flow control: smooth, stepless, low/medium precision, over a wide range of flow rates.

• Entirely clean design of gas part of compressor and valves - no lubrication;
• Do not contaminate gas - ideal for pumping high-purity gases;
• Ideal for charging, constant pressure, recharging;
• Unlimited number of start-up, shutdown cycles - designed for hard cycle load operation;
• Adjustment: smooth, simple, in a wide range from 0 to MAX;
• Fire and explosion-proof
• Manual or automated management: very simple, not highly qualified.
• Small and light - Mobile.

• Compressors are pressurizing: for compressor operation the gas pressure at the inlet must be not less than the minimum required;
• It is not economically feasible to fill gas cylinders with methane from a low-current domestic gas supply network using pressurizing compressors;
• Not designed to pump contaminated gases, gases with mechanical impurities;
• Low capacity equipment - maximum performance is limited;
• Maximum safe oxygen injection pressure: 365 bar;
• Maximum safe air injection pressure: 700 bar. If you need to work at higher pressures, you need to switch to gases that do not contain oxygen.

• Air, nitrogen, argon, helium;
• Gases of high and ultra-high purity: oxygen, hydrogen, nitrogen, nitrogen grade 1, nitrogen grade 6.0, helium, argon, krypton, xenon;
• Breathing gases: oxygen, nitrogen, air, breathing mixtures, nightrox;
• Looking for gases: hydrogen, helium;
• Hazardous, fire-hazardous, explosive gases;
• Hydrocarbons other than acetylene: natural gas, synthesis gas, propane, butane, methane, ethylene, carbon monoxide, associated petroleum gas;

Pneumatic-operated hydraulic HII units are used in chromatography when feeding a moving phase stream (mixture of liquid substances) to a chromatographic column to separate into components for analysis or to obtain a pure substance.

The use of the pump pneumatic drive ensures fire and explosion safety of the plant when operating with easily flammable liquids.

The purity of the eluent during pumping is maintained due to the fact that the hydraulic pump does not require lubricants.

Hydraulic units are used in both laboratory and preparation and industrial chromatographs.

• Drive type: pneumatic;
• Pressure range from 0 to 4000 atm (1-400 MPa);
• Performance range: 0 - 10 l/min (100 l/min max);
• The maximum performance for each model is different and depends on the mode of operation;
• Pneumatic drive power supply: industrial oil-free air, nitrogen 5-10 atm (0.5-1.0 MPa);
• Special versions of drives: powered by associated petroleum gas, methane, etc.;
• Pressure adjustment: smooth, stepless, high precision, in a wide range of operating pressures;
• Feed adjustment: smooth, stepless, medium precision, wide feed range.

• Do not contaminate pumped liquid - ideal for pumping high purity liquids;
• Ideal for pressure control tasks - in some modes it is tens, hundreds of times more efficient than analogues with electric drive;
• Do not heat the pumped liquid in any operating mode - do not require a heat exchanger;
• Do not require bypass valve, bypass valve for pressure adjustment;
• Do not require frequency, "automated" control without automation;
• Unlimited number of start-up, shutdown cycles - ideal for hard cycle load operation;
• Struts to hydraulic impact as a result of hydraulic fracturing of the article;
• Very wide, very smooth, very simple adjustment of supply and injection pressure in a wide range from zero to maximum values - even a child will cope;
• Do not require any electrics - full fire and explosion safety;
• Small, light, mobile;
• Inert to dust, moisture, weather;
• Fire - Explosion Proof
• Easy to operate, maintain, manage, repair.

• Not designed to pump contaminated liquids, liquids with mechanical impurities;
• Slow-moving equipment - maximum performance limits;
• Significantly more expensive than similar solutions with electric drive for hydraulic cutting, washing, pressure testing of products with a volume of more than 100 cubic meters, pre-filling of products and systems of large volumes - where constant high performance is required;
• Gas phase is not pumped;
• Not designed for high-precision dosing;

• Distilled water, deionized water;
• Hydrocarbons, solvents;
• High purity liquids.
• Explosive, flammable liquids.
• Reactive, aggressive fluids.