SKM Series 4-Inch Multistage Submersible Deep

The SKM series (4SKM100, 4SKM150 and 4SKM200) is a 4-inch multistage submersible centrifugal borehole pump built for lifting clean water from wells and reservoirs. The hydraulic end is constructed from a cast-copper ASTM C85500 delivery casing, suction lantern, diffuser and impeller, while the strainer, motor external casing and bottom support are made of AISI 304 stainless steel. The shaft is AISI 303 stainless steel to ASTM 5140, carried on NSK bearings and sealed by a special deep-well mechanical seal with graphite-ceramic/TC faces that is lubricated by oil suitable for food machinery and pharmaceutical use. Three single-phase models cover 0.75 kW (1 HP), 1.1 kW (1.5 HP) and 1.5 kW (2 HP) running at 2850 rpm on 220-240 V/50 Hz, producing shut-off heads of 62 m, 100 m and 110 m respectively and flows up to 2.7 m3/h (45 l/min). Three-phase 380-415 V/50 Hz versions are available, the motor is rewindable, and the unit is supplied with a start control box or a digital auto-control box, built to NEMA dimension standards with curves tolerance-checked to ISO 9906. Operating limits are a maximum fluid temperature of +35 degrees C, maximum sand content of 0.25%, maximum immersion depth of 50 m and a well diameter of 4 inches. Options include a special mechanical seal, other voltages or a 60 Hz frequency, and a single-phase motor with built-in capacitor. Typical applications are water supply from wells or reservoirs, domestic, civil and industrial water systems, and garden watering and irrigation.