Water applications
Standard piston switches are not suitable for water applications. Pressure switches in stainless steel with EPDM seal have a special sealing system and can therefore also be used for water with corrosion protection, water mixtures or emulsions. The use of other fluid mixtures should be clarified with SUCO ESI North America (e.g. swelling of EPDM sealing could happen by water – oil mixture).
Pressure switches with stainless steel housings with EPDM-TW diaphragm, SUCO type “5” are designed for the use of drinking water.
Gas applications
Our pressure switches are suitable for liquid and gaseous media. Gaseous media place particular demands on leak-tightness how ever. The leakage rate is dependent on the respective gaseous medium, the working pressure and the permeability of the seal material used in the pressure switch. Their lower leakage rates mean diaphragm pressure switches are better suited for gas pressures than piston pressure switches. The latter can also be used however if certain measures are taken (such as venting of the housing) For gaseous applications below 10 bar (145 PSI) in combination with pressure switches with high IP class, i.e. IP 67 and IP6K9K, in general we recommend to use ventilation.
We also offer Low Pressure Transducer suitable with air, non-corrosive gases, and liquids compatible with silicon.
Please consult us; we are able to offer suitable solutions.
Oxygen applications
Our mechanical pressure switches are suitable for use with oxygen. We recommend the use of our EPDM diaphragm. The resistance to internal burnout of the diaphragm has been tested by the BAM (Federal Institute for Material Testing). Pressure switches with steel housings with zinc-nickel coating are, in conjunction with oxygen, only approved to a maximum working pressure of 10 bar. Pressure switches with brass housings are, in conjunction with oxygen, only approved to a maximum working pressure of 35 bar. Pressure switches with stainless steel housings are, in conjunction with oxygen, only approved to a maximum working pressure of 50 bar. DGUV accident prevention regulations (such as DGUV 500, Section 2.32 and BGI 617) must be observed for first operation. Please specify when ordering “oil and grease- free, for use with oxygen”.
Underpressure safety of pressure switches
Our pressure switches are underpressure safe down to 300 mbar (relative).
Overpressure safety of vacuum switches
Our vacuum switches are overpressure safe up to 20 or 35 bar depending on type.
cCSAus approval
Almost all of our mechanical pressure switches (sizes hex 24 and hex 27), and vacuum switch 0151, have cCSAus approval. The CSA mark together with “c” and “us” combines the control stamps for introduction onto the Canadian and American markets. The cCSAus certificate also includes the test of the relevant UL standard.
Checked by an official institution and verified with regular company visits by CSA inspectors, this approval guarantees the highest levels of quality and operational reliability for our products.
Let us offer the pressure switch or pressure transducer that best fits your application.
Contact us > Phone: 1-800-473-7313 | Email: sales@sucoesi.com
