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Plunger/Check valve for pumps for feeding liquid chromatograph

High performance with excellent chemical and pressure resistance

As for liquid chromatography in general, in order to speed up analysis and to increase separation ability and sensibility of detection, pressurized solvent is fed by a pressure pump to a column. Therefore, it is called high speed liquid chromatography or HPLC (High Performance Liquid Chromatography). OGURA produces the plunger and the check valve used for high pressure pump.

HPLC is used for various area like medical care, food, environment, chemical, etc. for the purpose of separation-analysis, and is also getting inevitable as an analyzing method along with increasing consciousness of safety of food and environment.

Plunger for pumps for feeding of liquid of chromatograph

Plunger for pumps for feeding of liquid of chromatograph

This is a plunger used for pumps for feeding liquid chromatograph. Sapphire and zirconia ceramics are used as they have excellent properties of abrasion and chemical resistance.

Outer surface of plunger is so polished that the level of surface roughness and cylindrical degree should be outstandingly excellent. We can produce the surface roughness with Ra0.01µm and more and the cylindrical degree 0.005 mm and more.

In result, our plunger has a good sliding property together with low coefficient friction as the material characteristics.

Features

  • Material: Sapphire and zirconia ceramics
  • Excellent sliding property by polishing outer surface(Ra0.01µm and more, degree of cylindrical 0.005 mm and more).
  • Excellent abrasion resistance, chemical resistance and sliding property.

Check valve for pumps for feeding liquid chromatograph

Check valve for pumps for feeding liquid chromatograph

This is a valve used for pumps for feeding chromatograph liquid, and protect backward flow of the liquid.

It is composed of a valve seat of sapphire and a ruby ball with excellent abrasion-, pressure- and chemical-resistance.

Liquid leaking is protected by our own valve-seat shape and high precision ball. And for the quality maintenance and quality control, leaking test is under practice.

It is used mainly for valve for pumps of feeding chromatograph liquid, also used for other pressure pumps.

Features

  • Materials are sapphire for valve seat and ruby for ball
  • OGURA’s own valve seat shape and high precision ball protect liquid leakage
  • Excellent abrasion-, pressure- and chemical-resistance

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