Diaphragm seals

This review briefly describes the most common types of pressure transmitters. The upper part of the membrane pressure transmitters is usually made of chrome-nickel steel. For parts coming into contact with the medium to be measured, in all versions of pressure transmitters, special materials are used, for example:

• Chrome-nickel steel;
• Hastelloy B2;
• Hastelloy C4;
• Hastelloy С276
• Incoloy Alloy 825;
• Incoloy Alloy 600;
• Monel Alloy 400;
• Monel Alloy K500;
• Nickel;
• Tantalum;
• Titanium;
• Zirconium;
• Silver;
• Teflon.

Contacting of these special materials (except titanium, zirconium, teflon) with metal is done using patented technology.

In addition, there is a large selection of filling liquids for a variety of uses, for example, silicone oils for low temperatures up to -90° C and high temperatures up to +400° C; Glycerin, vegetable oil and paraffin oil for the food industry; halocarbon oil for working with chlorine and oxygen.

Installation of pressure transmitters on measuring instruments can be carried out rigorously directly on the instrument itself or with help of a movable capillary wire. "Hard" mounting is performed by direct screwing or welding the measuring devices to the pressure transmitting device. It can be made with the help of a connecting element. When working with high temperatures, an intermediate cooling element may be installed.