Glandless circulation pump for pipe installation with manual 3-stage speed switch.
With blocking-current proof motor. Pump housing made from cast iron (bronze depending on type), impeller made from glass reinforced plastic, stainless steel shaft with metal-impregnated carbon plain bearings. Used as standard in cold-water systems up to -10°C.
Operational safety thanks to drilled-through shaft and filter unit in front of the cartridge
|Fluid temperature T||-10 °C|
|Ambient temperature T||-10 °C|
|Maximum operating pressure PN||10 bar|
|Interference emission||EN 61000-6-3|
|Interference immunity||EN 61000-6-2|
|Mains connection||1~230 V, 50 Hz|
|Power consumption P1 max||48 W|
|Max. speed nmax||2720 1/min|
|Rated current IN||0.21 A|
|Protection class motor||IP44|
|Threaded cable connection||1 x PG11|
|Pump housing||Grey cast iron|
|Pipe connection on the suction side DNs||G 1½|
|Pipe connection on the discharge side DNd||G 1½|
|Port-to-port length L0||180 mm|
|Product description||Star-RS 25/4|
|Net weight, approx. m||2.4 kg|
With Wilo as your partner, you can not only be sure of choosing high-quality product solutions, but also of benefiting from a comprehensive, worry-free package of well thought-out services. We collaborate to develop a service concept tailored to your individual needs; with our expertise and personal consultancy, we make sure that the operation of your systems is as energy-efficient, reliable and economical as possible. All the while our competent Wilo service technicians are ready to assist you with fast, reliable and on-time support.
Wilo-Live Assistant Service
The Wilo-Live Assistant is a technical advisor at your side during pump service. By using the Wilo-Live Assistant, our expert advisers can support you in the boiler or equipment room via video transmission – live and in real time. You use your smartphone to show the installation set-up, while the Wilo expert follows everything on their screen. They can see the components as well as other details and can thus determine where the fault or breakdown originates. We prevent downtime and ensure operational reliability of your pumps and systems!
The Wilo-Live Assistant includes:
System Optimisation Glandless pumps
The Wilo Service offers proactive system optimisation by optimising settings and doing minor adjustments to ensure operational reliability. System Optimisation includes among others:
Energy Solutions Glandless pumps
Wilo Service offers a proactive support to point out possible energy savings. Our service creates an overview of all installed assets to show how the energy consumption of pumps or systems can be reduced. We offer targeted consultancy and analysis, including the involvement of subsidies as well as comprehensive support around the changeover to high-efficiency technologies. Wilo-Energy solution includes:
More suitable services
Extended warranty glandless pumps
In combination of a new pump or system Wilo offers an extended warranty of up to five years in combination with commissioning and maintenance by the Wilo Service.
Extended warranty includes:
Supervision Glandless pumps
Wilo supports during the concept phase to ensure quality work and cost efficiency. Our competent and qualified Wilo Service will support you with recommendations and technical advice throughout the entire project.
Installation Glandless pumps
The Wilo service offers installation of our pumps or pumping systems. We offer an end-to-end process from gathering information on site to installing our product in the overall plant. An optimal installation set-up and the interaction of various individual factors lay the foundation for long-term operational safety.
Commissioning Glandless pumps
For perfect functioning of the pump(s) / system(s), it is recommended to have the commissioning carried out by the works' own WILO SE Customer Service Department. Optimum setting and efficient operation of the system are ensured as a result. Commissioning is comprised of the following points:
The price for commissioning only applies to system(s) which have been installed in accordance with the installation and operating instructions and state-of-the-art technology. No costs for any materials which may be required are included.
Maintenance BASIC Glandless pumps
In order to ensure and guarantee operational reliability of the pumps/systems, it is recommended to have regular and DIN-compliant inspections and maintenance carried out by the works' own WILO SE Customer Service Department. The tasks are carried out in accordance with DIN 31051 / DIN EN 13306. The tasks comprise the following points:
Scheduling and organisation is performed by WILO. Other individual maintenance offers are possible on request.
Maintenance COMFORT Glandless pumps
Maintenance PREMIUM Glandless pumps
Repair Glandless pumps
Wilo Service draws on their competence and experience while consulting on site to decide whether the pump can actually be repaired on site or has to be sent in for a factory repair. Wilo also provides spare parts or a replacement pump to restore the operational reliability of the system.