PUMP BODY: cast iron, with UIN ISO 228/1 gas threaded suction and delivery openings, threaded side openings for installing a pressure gauge and pressure switch. PUMP BODY COVER: cast iron,serving also as mechanical seal horsing. EJECTOR UNION: plastic PPO (approved for drinking water) IMPELLER: brass, centrifugal radial flow 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. PROTCTION: IP 44. OPERATING LIMITS:Fluid temperature up to+40℃ Maximum ambient temperature+40℃