{"product_id":"tsurumi-ktze21-5-cast-iron-automatic-submersible-drainage-pump-for-foundation-dewatering-with-semi-open-impeller","title":"Tsurumi KTZE21.5 Cast Iron Automatic Submersible Drainage Pump for Foundation Dewatering with Semi-open Impeller","description":"\u003cp\u003eContractors seeking energy-saving water management in foundation pits and construction sites will find this automatic submersible drainage pump to be an ideal solution. Floatless electrode control automatically starts and stops the pump according to water level, eliminating dry-running while reducing power consumption by up to 40%. This mechanism extends the overall operating life by preventing mechanical stress.\u003c\/p\u003e\u003cp\u003ePowered by a 1.5 kW \/ 415v three-phase motor, the unit offers up to approximately 21.5 m of head and up to approximately 430 L\/Min flow. These performance figures provide stable vertical discharge through its 50 mm bore, making it suitable for automatic foundation drainage and site drawdown. It operates reliably in drainage fluids containing up to 10% dry matter with a pH value between 5 and 9.\u003c\/p\u003e\u003cp\u003eAbrasion is minimized through a high-chromium cast iron semi-open impeller designed to resist wear from abrasive particles in suspension. The pump maintains smooth movement for solids up to 8.5 mm, ensuring site debris is moved through the housing without settling or causing clogs. Streamlining the internal flow path protects the cast iron housing from localized wear typical of automatic site water management cycles.\u003c\/p\u003e\u003cp\u003eA gray cast iron body and top discharge, side flow design enable efficient motor cooling. Protection features include dual silicon carbide mechanical seals and Tsurumi's original Oil Lifter for reliable seal lubrication. An anti-wicking cable entry block and circle thermal protector built into the 1.5 kW motor housing guard against moisture and thermal stress.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFEATURES\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eInnovative electrode relay unit enables automatic start\/stop operation and reduces power consumption by up to 40%.\u003c\/li\u003e\n\u003cli\u003eDry-running prevention mechanism extends operating life by eliminating the stress associated with air-exposed pumping.\u003c\/li\u003e\n\u003cli\u003eHigh-chromium iron semi-open impeller provides superior abrasion resistance in sand-laden drainage water.\u003c\/li\u003e\n\u003cli\u003eTop discharge, side flow design facilitates continuous duty during drawdown by cooling the motor housing.\u003c\/li\u003e\n\u003cli\u003eSelectable discharge direction allows for either vertical or inclined alignment to prevent hose folding.\u003c\/li\u003e\n\u003cli\u003eDual inside silicon carbide mechanical seals offer extreme resistance to dry-heating and adhering matter.\u003c\/li\u003e\n\u003cli\u003eWatertight cable entry with an anti-wicking block protects the motor from capillary water incursion and moisture.\u003c\/li\u003e\n\u003cli\u003eProprietary Oil Lifter maintains seal face lubrication and cooling down to one-third of the normal level.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tsurumi","offers":[{"title":"Default Title","offer_id":50931154387191,"sku":"KTZE21.5","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0927\/0116\/3767\/files\/tsurumi-ktze21-5-cast-iron-automatic-submersible-drainage-pump-for-foundation-dewatering-with-semi-open-impeller.png?v=1783765218","url":"https:\/\/foundationpumps.com.au\/products\/tsurumi-ktze21-5-cast-iron-automatic-submersible-drainage-pump-for-foundation-dewatering-with-semi-open-impeller","provider":"Foundation Pumps","version":"1.0","type":"link"}