PUMP BODY: cast iron, with UIN ISO 228/1 gas threaded suction and delivery openings. MOTOR BRACKET: aluminium with front brass insert; reducing difficulties when starting the pump after long periods without use,due to the impeller blocking. IMPELLER: brass. MOTOR SHAFT: AISI 314 stainless steel, MECHANICAL SEAL: ceramic and graphite, MOTOR: the pumps are coupled to an asynchronous, high efficiency TEK induction motor of suitable size, which is quiet, closed and externally ventilated, suitable for continuous duty. INSULATION class B (Class F) The thermal cutout replay (motor protector ) is incorporated in all single phase motors. Three phase motors require an adequate external motor protector, with connections according to current standards. protection: IP 44.