132 SWITCHES PRESSURE TECHNICAL FEATURES PMA and PTA - for air compressors - cover with red On/Off button APPLICATIONS Pressure switches for use with air compressors. The switch automatically ensures start and stop functions of the compressor according to the preset pressure values Membrane NBR rubber with textile insert, Oil-resistant Electric contacts normally closed and made of brass alloy with Ag-Ni surfacing. Fluids controlled air (5°C÷55°C) Protection degree IP44 Rated current 16(10)A Cable glands Included Terminal block with full insulated live parts Embodied Air-relief valve for 6 mm Ø pipe: PMA with delayed closing system PTA with instant-closing action CODE PH Setting range [bar] Factory setting [bar] Connection IT PMA 12 1 3 - 12 6 - 8 1/4"F IT PMA 12 4 1 3 - 12 6 - 8 1/4"F + 3x1/4"F IT PTA 12 3 3 - 12 6 - 8 1/4"F IT PTA 12 4 3 3 - 12 6 - 8 1/4"F + 3x1/4"F
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