Low Pressure Filter Press Model ZNS-2A



Work stress


Maximum cup pressure


Effective filtration loss area


Product Description

Model ZNS-2/2A Low Pressure Filter Press is the most effective means of determining filtration properties of drilling fluids and cement slurries. All Low Pressure Filter Press assemblies consist of these items:

  • mud reservoir mounted in a frame
  • pressure assembly and regulator
  • filter paper
  • 25 ml graduated cylinder

Measuring filtration behavior and wall-cake building characteristics of a mud is essential to drilling fluid control and treatment. The characteristics of filtrate, such as oil, water, or emulsion content are also important. The types and quantities of solids in the fluid and their physical and chemical interactions affect these characteristics. Temperature and pressure affect the physical and chemical interactions. Performing tests at both low pressure/low temperature and high pressure/high temperature is necessary, and these testing conditions require different equipment and techniques.

The basic filter press has a cell assembly constructed of stainless steel or aluminum material and includes the required screens and gaskets.

Working pressure is 0.69MPa and the filtering area is 45.6cm², as specified in API standard.

Compressed oxygen should not be used as a pressure source. Fire and explosion hazards exist when using oxygen.

Type Specification

ZNS-2Low pressure filter pressSingle aluminum drilling fluid cup
ZNS-2ALow pressure filter pressSingle stainless steel drilling fluid cup

Technical Specification

No.Technical SpecificationModel
1Work stress0.69MPa
2Maximum cup pressure1MPa
3Maximum drilling fluid injection240ml240ml
4Effective filtration loss area45.6cm²
5Net weight / Gross weight4.5kg/7.56kg5.12kg/8.24kg
6Overall dimensions370×320×570mm
7Packing size620×176×365mm