29 General Data 4’’WPS® Pipe connection The 4”WPS® pumps have a Rp1 ½” connection for the models 4”WPS® 1,5 (NE), 4”WPS® 2,5 (NE) and 4”WPS® 4 (NE). The 4”WPS® 7 (NE), 4”WPS® 13 (NE) and 4”WPS® 20 (N) pumps have a Rp 2“ outlet. Flange adaptors are available on request. Pump identification code Example 4”WPS® 7 - 13 N 4” pump Stainless Steel Submersible Pump Rated flow (in m3/h) Number of stages Material Code (standard, N or NE) Pumped liquids 4”WPS® pumps are designed for pumping thin, clean, non-aggressive and non-explosive liquids, not containing solid particles. 4”WPS® pumps are suitable for pumping liquids with a content of sand up to 150 g/m³. A higher content of sand will shorten pump lifetime. The maximum fluid temperature is 35°C. For higher temperatures, please contact Well Pumps. Operating condition 4”WPS® pumps can be installed in horizontal or vertical position. The maximum pumped liquid temperature is limited to 35°C with a minimum flow over the motor of 8 cm/sec and this to ensure the cooling of the motor. For applications with a higher liquid temperature or lower cooling speeds, please contact Well Pumps S.A. Curve Conditions • Curve tolerances according to ISO 9906:2012, class 3B. • The performance curves show pump performance at actual speed of the standard motor range. • The measurements were made with airless water at a temperature of 20°C and a kinematic viscosity of 1 mm2/s (1 cSt). For pumping liquids with a higher density than clear water, motors must be used with correspondingly higher outputs. • Q/H: The curves are inclusive of valve and inlet losses at the actual speed. • Power curve: P2 shows pump input power at the actual speed for each individual pump size. • Efficiency curve: η shows pump efficiency. Service The pump and motor are very easy to maintain and repair. The modular pump and motor design facilitates installation and service.
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