Features: 1) Product: GRS screwed-end pump with rated shut-off head 2) Technical parameters: a) Suitable fluids b) Heating water to VDI2035 c) Water and glycol mixture max. mixing ratio: 1:1 d) Hydraulic corrections required for mixing ratio above 20% e) Single-speed automatic switch f) Fluid temperature range: -10 ~ +110 g) Max. working pressure: 10bar h) Ambient temperature permissible up to 40 i) Main power: 1 ~ 230V, 50Hz j) Degree of protection: IP54 k) Insulation class: F 3) Construction materials: a) Pump body: cast iron b) Impeller: GF-PP c) Shaft: ceramic d) Bearings: graphite 4) Accessories: union connector fittings, thermal insulation 5) Mounting positions: pump shaft in the horizontal plane, terminal box optionally at 3, 6, 9 or 12 o'clock 6) Pump equipment: a) Screwed end single head pump b) Manual 3-speed control c) Non-overloading single phase motor d) Special design versions GRS25/4 and GRS25/6 e) Bronze body: 180mm (port-to-port) f) Cast iron body: 130mm