The Wilo STAR-S21F Hot Water Cast Iron Circulator is designed for hot water heating systems, industrial circulation, cold-water systems, and air-conditioning applications. Its cast iron body, seal-less magnetic drive, and quiet maintenance-free operation ensure reliable, long-lasting performance. This 3-speed circulator handles water, domestic hot water, and water/glycol mixtures (max. 1:1). Energy-efficient and UL/CSA listed, the STAR-S21F is an ideal replacement for several common circulator models.

Specifications:

• Flow Rate: 10 GPM

• Speeds: 3 (2700, 2100, 1300 RPM)

• Motor: 1/8 HP, 115V, 1 Phase, 60 Hz

• Power Consumption: 40/40/40 W

• Amps: 0.92 / 0.75 / 0.56

• Minimum Fluid Temperature: 36°F

• Maximum Fluid Temperature: 230°F

• Minimum Inlet Pressure: 14.5 PSI @ 230°F; 4.4 PSI @ 203°F; 0.7 PSI @ 122°F

• Maximum Working Pressure: 140 PSI

• Connection Type: Two 1/2" diameter bolt holes

• Flange to Flange: 6-3/8"

• Overall Length: 6-3/8"

• Maximum Width: 5-15/16"

• Weight: 6.5 lbs

• Materials: Cast iron volute, polypropylene impeller (40% glass filled), stainless steel shaft, metal-impregnated carbon bearings

Replacement Guide:

• Grundfos 15-58FR

• Taco 009-F5

• Armstrong Astro-70

• Bell & Gossett NRF-22

Key Benefits:

• Quiet, maintenance-free operation

• Low energy consumption

• UL/CSA listed

• Reliable replacement for popular circulator models

Company Contact:
Industry Safety Nigeria
Email: sales@safetynigeria.com
Phone: 08064338888, 09134151806
WhatsApp: 09093333374, 08064338888