Description
Designed to protect pressure measurement instruments from aggressive process conditions. Pressure gauges with diaphragm seals are a safe and accurate solution for pressure measurement; they are a closed system consisting of a diaphragm and a pressure gauge, filled with a sealing liquid.
Materials
To adapt to different operating conditions and types of chemical agents, the diaphragm seals are available in two main materials:
- Polypropylene (PP): offers a good chemical resistance to many substances, making it a versatile and economical solution for general industrial applications with moderate temperatures (up to approximately 80-90°C)Compatible liquids with PP include: phosphoric acid, sulfuric acid (up to certain concentrations and temperatures), ferric chloride, citric acid, liquid ammonia, sodium hydroxide (caustic soda, at low concentrations and temperatures) and many more.
- PVDF (Polyvinylidene Fluoride): offers exceptional chemical and thermal resistence, ideal for highly corrosive fluids, strong acids, solvents, and higher temperatures (up to approximately 150°C), as well as high purity.Compatible liquids with PVDF include: acetic acid, ethyl alcohol, zinc chloride, formaldehyde, hydrochloric acid, nitric acid (up to certain concentrations), hydrogen peroxide, potassium hydroxide, and many more.
