PMM
PMM
The PMM adjustable pressure switches are designed with screw terminals and have a maximum voltage of 48 Vac/dc. They support a resistive current of 0.5 (0.2) A and operate within a temperature range of -40°C to +140°C, depending on the diaphragm or gasket material used. The mechanical life of these switches is rated at 106 cycles.
Protection and Housing:
The switches offer different levels of protection: IP 00 for screw terminals, IP 54 with CAP 1, and IP 65 with CAP 3. The switch housing is made from PA 66 material.
Performance and Testing:
The maximum cycle rate at 25°C is 200/min for diaphragm types and 80/min for piston types. The switches undergo a strength test of 1500 V - 10 mA for 10 seconds. Recommended tightening torque is a maximum of 4 Kgm.
Ordering Information:
The pressure switches are available with different contact types (N/O and N/C) and body materials (Brass, Zinc plated steel, S.S. 316). Various diaphragm materials are available, including NBR, FKM, Silicone, HNBR, Neoprene, EPDM, and Stainless Steel, each suitable for specific temperature ranges.
Thread Options:
The switches can be ordered with different thread types, including G1/8 BSPT, G1/4 BSPT, M10x1, M12x1.5, G1/4 BSPP, G1/8 BSPP, 1/4” NPT, and 1/8” NPT.
Options and Features:
Additional options include snubbers for pressure spikes, set-point adjustments, gold-plated contacts for low current, and degreased or tested versions for specific applications like oxygen or gas.
Technical Data:
The document provides detailed technical data for various models, including adjustment pressure ranges, dimensions, maximum static pressure, fixed hysteresis, and tolerance at 25°C. The models range from PMM 1 to PMM 300, each with specific characteristics.
Compliance and Recommendations:
Elettrotec complies with EN 1090-2 standards, limiting material stress to a percentage of the yield point. Users are responsible for verifying product suitability for specific applications, and field tests are recommended to ensure compatibility and performance.
Catalog excerpts
PRESSOSTATI REGOLABILI CON MORSETTI A VITE Adjustable pressure switches with screw terminals Tensione massima 48 Vca/cc CAPPUCCI DI PROTEZIONE / PROTECTION CAPS PROTEZIONE IP 54 / IP 54 PROTECTION PROTEZIONE IP 65 / IP 65 PROTECTION ELETTROTEC www.elettrotec.com
Open the catalog to page 1
PRESSOSTATI REGOLABILI CON MORSETTI A VITE Adjustable pressure switches with screw terminals Opzioni / Options SM - T... - T...D - G - SG - TG Elettrotec si riserva la facolta di apportare modifiche tecniche ai prodotti o di cessarne la produzione senza obbligo di preavviso. Il contatto del pressostato puo danneggiarsi quando sottoposto a forti urti o ad alte vibrazioni. E responsabilita dell’utilizzatore verificare l’idoneita dei nostri prodotti per ogni particolare applicazione (ad esempio, la verifica della compatibilita dei materiali) e l’uso puo essere appropriato solo se dimostrato in test...
Open the catalog to page 2
SENZA PRESSIONE WITHOUT PRESSURE SENZA PRESSIONE WITHOUT PRESSURE DATI TECNICI GENERALI GENERAL TECHNICAL DATA Vite di regolazione / adjusting screw Fast on di collegamento /_ push on terminal Molla / spring Porta contatti / contact holder Disco di contatto, chiuso / contact plate, close position Membrana / membrane Corpo Ch 24 / body Sw 24 CON PRESSIONE WITH PRESSURE Vite di regolazione / adjusting screw Fast on di collegamento / push on terminal Molla / spring Porta contatti / contact holder Disco di contatto, aperto / contact plate, open position Membrana / membrane Corpo Ch 24 / body Sw 24...
Open the catalog to page 3
Elettrotec si riserva la facolta di apportare modifiche tecniche ai prodotti o di cessarne la produzione senza obbligo di preavviso. Il contatto del pressostato puo danneggiarsi quando sottoposto a forti urti o ad alte vibrazioni. E responsabilita dell’utilizzatore verificare l’idoneita dei nostri prodotti per ogni particolare applicazione (ad esempio, la verifica della compatibilita dei materiali) e l’uso puo essere appropriato solo se dimostrato in test sul campo. Le informazioni tecniche in questo catalogo si basano su prove effettuate durante lo sviluppo del prodotto e in base ai valori empiricamente...
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