... , with features of exchangeable components, stable quality, small size, light weight, corrosion resisting, high efficiency, long working life, beautiful ... thermal protector, Class F or B, Protection IP54, Continuous duty.Operation Condition:Liquid Temperature: -15°C to +80°CAmbient Temperature: ... 58.87.86.75 BK 200DBK200T1.52.012.51211108.26.5 -BK300T2.23.015141312.5119.997 -BK400T3.04.0181716151412. ...