{"product_id":"bomba-espa-silen-s2-antigua-silen-2","title":"Espa Silen S2 ultra-quiet pool filtration pump, 0.75 to 3 HP","description":"\u003ch2\u003eUltra-quiet filtration pump for pools from 18 to 36 m³ per hour\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eEspa Silen S2\u003c\/strong\u003e is the self-priming pump with pre-filter that Q-Tech fits in its pool plant rooms when the equipment has to be as quiet as possible. The range covers five sizes, from 0.75 to 3 HP, in single-phase and three-phase versions, and it reaches site \u003cstrong\u003etested and configured\u003c\/strong\u003e inside the plant room.\u003c\/p\u003e\n\u003ch3\u003eSummary\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\u003cth\u003eType\u003c\/th\u003e\u003ctd\u003eSingle-stage self-priming centrifugal pump with pre-filter\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eBrand and range\u003c\/th\u003e\u003ctd\u003eEspa Silen S2, replaces the Silen 2\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eUse\u003c\/th\u003e\u003ctd\u003eWater recirculation and filtration in domestic and public pools\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eFlow rate\u003c\/th\u003e\u003ctd\u003e18 to 36 m³ per hour depending on the model\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eMaximum head\u003c\/th\u003e\u003ctd\u003e13.2 to 21.5 m\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eCompatible with\u003c\/th\u003e\u003ctd\u003eChlorinated and salt water up to 7 g per litre, up to 40 °C\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003ePower supply\u003c\/th\u003e\u003ctd\u003e230 V single-phase or 230 and 400 V three-phase\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eQ-Tech installation\u003c\/th\u003e\u003ctd\u003e\u003ca href=\"\/en-en\/pages\/pre-montaje-avanzado\"\u003ePre-assembled plant room\u003c\/a\u003e or on-site day rate\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eWhat is the Silen S2?\u003c\/h3\u003e\n\u003cp\u003eThe Espa Silen S2 is a single-stage self-priming centrifugal pump for pool recirculation that lifts water from up to 4 metres below its shaft. The two-pole asynchronous motor runs in continuous duty. It is installed next to the filter, in a plant room or a ventilated housing.\u003c\/p\u003e\n\u003ch3\u003eWhat problem does it solve?\u003c\/h3\u003e\n\u003cp\u003eIn a correctly sized pool the whole body of water passes through the filter several times a day, and the pump is the only thing you hear during those hours. A noisy pump a few metres from the terrace dictates when you can filter, and filtering too little shows up as cloudy water and extra chemicals.\u003c\/p\u003e\n\u003cp\u003eChoosing the wrong size costs just as much. An undersized pump never overcomes the filter's pressure loss and the system never reaches its design flow; an oversized one pulls sand out of the filter, uses more power and punishes the mechanical seal. The \u003cstrong\u003ehead of the installation\u003c\/strong\u003e matters as much as the volume of the pool.\u003c\/p\u003e\n\u003ch3\u003eTechnical data\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\u003cth\u003ePump body, impeller and diffuser\u003c\/th\u003e\u003ctd\u003eTechnopolymer\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eShaft\u003c\/th\u003e\u003ctd\u003eAISI 431 stainless steel\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eMechanical seal\u003c\/th\u003e\u003ctd\u003eAlumina and graphite\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eMotor casing\u003c\/th\u003e\u003ctd\u003eAluminium\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eSeals\u003c\/th\u003e\u003ctd\u003eNBR and EPDM\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eMotor\u003c\/th\u003e\u003ctd\u003eAsynchronous, two poles, class F, continuous duty, automatic reset\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eProtection\u003c\/th\u003e\u003ctd\u003eIPX5, with built-in thermal protection\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eConnections\u003c\/th\u003e\u003ctd\u003e63 mm suction and discharge, solvent weld\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eMaximum suction lift\u003c\/th\u003e\u003ctd\u003e4 m\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eOperating limits\u003c\/th\u003e\u003ctd\u003eWater up to 40 °C and 7 g per litre of salt\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eDimensions\u003c\/th\u003e\u003ctd\u003e624 by 272 by 219 mm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eEquipment\u003c\/th\u003e\u003ctd\u003eUnions included; supplied without cable\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eModels and data by variant\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\u003cth\u003eModel\u003c\/th\u003e\u003cth\u003ePower\u003c\/th\u003e\u003cth\u003eMaximum flow\u003c\/th\u003e\u003cth\u003eMaximum head\u003c\/th\u003e\u003cth\u003ePower supply\u003c\/th\u003e\u003cth\u003ePart number\u003c\/th\u003e\u003cth\u003eEAN\u003c\/th\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eSilen S2 75 18 M\u003c\/th\u003e\u003ctd\u003e0.55 kW · 0.75 HP\u003c\/td\u003e\u003ctd\u003e18 m³ per hour\u003c\/td\u003e\u003ctd\u003e13.2 m\u003c\/td\u003e\u003ctd\u003e230 V single-phase\u003c\/td\u003e\u003ctd\u003e203155\u003c\/td\u003e\u003ctd\u003e8421535149569\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eSilen S2 75 18 T\u003c\/th\u003e\u003ctd\u003e0.55 kW · 0.75 HP\u003c\/td\u003e\u003ctd\u003e18 m³ per hour\u003c\/td\u003e\u003ctd\u003e13.2 m\u003c\/td\u003e\u003ctd\u003e230 and 400 V three-phase\u003c\/td\u003e\u003ctd\u003e203160\u003c\/td\u003e\u003ctd\u003e8421535149613\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eSilen S2 100 24 M\u003c\/th\u003e\u003ctd\u003e0.90 kW · 1.2 HP\u003c\/td\u003e\u003ctd\u003e24 m³ per hour\u003c\/td\u003e\u003ctd\u003e16.5 m\u003c\/td\u003e\u003ctd\u003e230 V single-phase\u003c\/td\u003e\u003ctd\u003e203156\u003c\/td\u003e\u003ctd\u003e8421535149576\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eSilen S2 100 24 T\u003c\/th\u003e\u003ctd\u003e0.90 kW · 1.2 HP\u003c\/td\u003e\u003ctd\u003e24 m³ per hour\u003c\/td\u003e\u003ctd\u003e16.5 m\u003c\/td\u003e\u003ctd\u003e230 and 400 V three-phase\u003c\/td\u003e\u003ctd\u003e203161\u003c\/td\u003e\u003ctd\u003e8421535149620\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eSilen S2 150 29 M\u003c\/th\u003e\u003ctd\u003e1.10 kW · 1.5 HP\u003c\/td\u003e\u003ctd\u003e29 m³ per hour\u003c\/td\u003e\u003ctd\u003e18.5 m\u003c\/td\u003e\u003ctd\u003e230 V single-phase\u003c\/td\u003e\u003ctd\u003e203157\u003c\/td\u003e\u003ctd\u003e8421535149583\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eSilen S2 150 29 T\u003c\/th\u003e\u003ctd\u003e1.10 kW · 1.5 HP\u003c\/td\u003e\u003ctd\u003e29 m³ per hour\u003c\/td\u003e\u003ctd\u003e18.5 m\u003c\/td\u003e\u003ctd\u003e230 and 400 V three-phase\u003c\/td\u003e\u003ctd\u003e203162\u003c\/td\u003e\u003ctd\u003e8421535149637\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eSilen S2 200 31 M\u003c\/th\u003e\u003ctd\u003e1.50 kW · 2 HP\u003c\/td\u003e\u003ctd\u003e31 m³ per hour\u003c\/td\u003e\u003ctd\u003e19.5 m\u003c\/td\u003e\u003ctd\u003e230 V single-phase\u003c\/td\u003e\u003ctd\u003e203158\u003c\/td\u003e\u003ctd\u003e8421535149590\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eSilen S2 200 31 T\u003c\/th\u003e\u003ctd\u003e1.50 kW · 2 HP\u003c\/td\u003e\u003ctd\u003e31 m³ per hour\u003c\/td\u003e\u003ctd\u003e19.5 m\u003c\/td\u003e\u003ctd\u003e230 and 400 V three-phase\u003c\/td\u003e\u003ctd\u003e203163\u003c\/td\u003e\u003ctd\u003e8421535149644\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eSilen S2 300 36 M\u003c\/th\u003e\u003ctd\u003e2.20 kW · 3 HP\u003c\/td\u003e\u003ctd\u003e36 m³ per hour\u003c\/td\u003e\u003ctd\u003e21.5 m\u003c\/td\u003e\u003ctd\u003e230 V single-phase\u003c\/td\u003e\u003ctd\u003e203159\u003c\/td\u003e\u003ctd\u003e8421535149606\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003eSilen S2 300 36 T\u003c\/th\u003e\u003ctd\u003e2.20 kW · 3 HP\u003c\/td\u003e\u003ctd\u003e36 m³ per hour\u003c\/td\u003e\u003ctd\u003e21.5 m\u003c\/td\u003e\u003ctd\u003e230 and 400 V three-phase\u003c\/td\u003e\u003ctd\u003e203164\u003c\/td\u003e\u003ctd\u003e8421535149651\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eCompatibility and limits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e63 mm solvent weld\u003c\/strong\u003e pipework on suction and discharge; the unions are included.\u003c\/li\u003e\n\u003cli\u003eSuction up to 4 m below the pump shaft.\u003c\/li\u003e\n\u003cli\u003eChlorinated water or salt chlorination up to 7 g per litre. For seawater, the Noxsalt range.\u003c\/li\u003e\n\u003cli\u003eWater temperature up to 40 °C.\u003c\/li\u003e\n\u003cli\u003eThree-phase versions need thermal protection in the control panel; the pump is supplied without a cable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhen this product is not the right choice\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\u003cth\u003eAlternative\u003c\/th\u003e\u003cth\u003eWhen to choose it\u003c\/th\u003e\u003cth\u003eFlow rate\u003c\/th\u003e\u003cth\u003eConnection\u003c\/th\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003e\u003ca href=\"\/en-en\/products\/bomba-silen-s-de-espa\"\u003eEspa Silen S\u003c\/a\u003e\u003c\/th\u003e\u003ctd\u003eSmall and medium pools\u003c\/td\u003e\u003ctd\u003e12 to 22 m³ per hour\u003c\/td\u003e\u003ctd\u003e63 mm with 50 mm reducer\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003e\u003ca href=\"\/en-en\/products\/bomba-espa-noxplus-de-velocidad-variable\"\u003eEspa NoxPlus\u003c\/a\u003e\u003c\/th\u003e\u003ctd\u003eWhen you want to cut running costs with variable speed\u003c\/td\u003e\u003ctd\u003eAdjustable\u003c\/td\u003e\u003ctd\u003e50 mm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003cth\u003e\u003ca href=\"\/en-en\/products\/bomba-noxsalt-de-espa-para-agua-de-mar\"\u003eEspa NoxSalt\u003c\/a\u003e\u003c\/th\u003e\u003ctd\u003eSeawater or salinity above 7 g per litre\u003c\/td\u003e\u003ctd\u003e15 to 22 m³ per hour\u003c\/td\u003e\u003ctd\u003e50 mm\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhich model do I need?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe one that delivers your design flow against the real head of your installation, not the one with the most horsepower. The pool volume divided by the filtration hours gives the minimum flow, and the filter and pipework give the head.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it replace the Silen 2?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The Silen S2 is the current version of the Espa Silen 2, with new materials.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it work in a salt water pool?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, up to 7 grams per litre, which is the normal range for salt chlorination. Above that figure, the Noxsalt range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it come with a cable?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Espa supplies it without a cable: the electrical connection and its protection are made in the control panel.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the delivery time?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis item is in stock at our warehouse.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I install it myself?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe hydraulic side is straightforward if the pipework is 63 mm, but the electrical connection and the filtration timing are better left to a technician. Q-Tech does this on-site or delivers the pre-assembled plant room.\u003c\/p\u003e\n\u003ch3\u003eQ-Tech installation and support\u003c\/h3\u003e\n\u003cp\u003eQ-Tech fits the pump inside the \u003ca href=\"\/en-en\/pages\/pre-montaje-avanzado\"\u003epre-assembled plant room\u003c\/a\u003e: it is wired, configured and tested at our workshop, and reaches site ready to connect, with \u003cstrong\u003efewer site visits and fewer incidents\u003c\/strong\u003e for the developer, the design team and the installer. The final connection is made by the site installer or by Q-Tech. If the pump goes into an existing installation, book the \u003ca href=\"\/en-en\/products\/tecnico-experto-in-situ-horas\"\u003everification visit\u003c\/a\u003e first; for one-off questions, the \u003ca href=\"\/en-en\/products\/expert-technician-remote-technical-call\"\u003etechnical call\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eDocumentation\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.espa.com\/download\/docs\/7658\/catalogue-espa-pool-2026-eng.pdf\" target=\"_blank\" rel=\"noopener\"\u003eEspa Pool 2026 catalogue, with curves and dimensions for the Silen S2 range\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"qt-nota-stock\"\u003e\u003cstrong\u003eAvailability and lead times:\u003c\/strong\u003e this item is in stock at our warehouse. Occasionally, depending on the time of year, the stock update may contain an error. If no units are available when you place your order, we will order it urgently and inform you immediately of the updated delivery time.\u003c\/p\u003e","brand":"Espa","offers":[{"title":"Silen S2 75 18 M · 0.75 HP","offer_id":12317535928408,"sku":"ESPA-203155","price":410.0,"currency_code":"EUR","in_stock":true},{"title":"Silen S2 75 18 T · 0.75 HP","offer_id":12317535961176,"sku":"ESPA-203160","price":410.0,"currency_code":"EUR","in_stock":true},{"title":"Silen S2 100 24 M · 1.2 HP","offer_id":12317535993944,"sku":"ESPA-203156","price":442.0,"currency_code":"EUR","in_stock":true},{"title":"Silen S2 100 24 T · 1.2 HP","offer_id":12317536026712,"sku":"ESPA-203161","price":421.0,"currency_code":"EUR","in_stock":true},{"title":"Silen S2 150 29 M · 1.5 HP","offer_id":12317535731800,"sku":"ESPA-203157","price":459.0,"currency_code":"EUR","in_stock":true},{"title":"Silen S2 150 29 T · 1.5 HP","offer_id":12317535895640,"sku":"ESPA-203162","price":423.0,"currency_code":"EUR","in_stock":true},{"title":"Silen S2 200 31 M · 2 HP","offer_id":12317535862872,"sku":"ESPA-203158","price":447.31,"currency_code":"EUR","in_stock":true},{"title":"Silen S2 200 31 T · 2 HP","offer_id":12317535830104,"sku":"ESPA-203163","price":443.0,"currency_code":"EUR","in_stock":true},{"title":"Silen S2 300 36 M · 3 HP","offer_id":12317535764568,"sku":"ESPA-203159","price":599.0,"currency_code":"EUR","in_stock":true},{"title":"Silen S2 300 36 T · 3 HP","offer_id":12317535797336,"sku":"ESPA-203164","price":441.12,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0015\/4592\/8792\/files\/espa-silen-s2-bomba-filtracion-piscina-vista-principal.webp?v=1794571213","url":"https:\/\/q-tech.es\/en\/products\/pump-espa-silen-s2-old-silen-2","provider":"Q-Tech ® ","version":"1.0","type":"link"}