In-line twin-head pump with two single-stage glanded centrifugal pumps in the same housing with switchover valve, for pipe installation or installation on a base. Housing blind flange and mounting bracket at an additional charge. Low-oscillation and low-noise monobloc design with lantern and rigidly connected standard flange motor (standard motor). With forced-flow circulation, bidirectional bellows mechanical seal and cavitation-reducing impeller. Flanges with pressure measuring connections R 1/8. The pump housing and lantern are cataphoretic-coated.
Motors in IE3 technology as standard. Pumps with motors ≥ 5.5 kW are equipped as standard with a PTC thermistor sensor for motor protection.
The motor terminal box ≤ 7.5 kW can be made of metal or plastic. If a metal terminal box is absolutely necessary, please order the appropriate special variant. The motor terminal boxes > 7.5 kW are always made of metal.
Approved field of application
– Standard version for operating pressure: 13 bar to +140 °C, 16 bar to +120 °C
– Temperature range at max. ambient temperature: -20 °C – +140 °C (depending on the fluid)
– Max. ambient temperature: +40 °C
– Mechanical seal for pumping water up to Tmax = +140 °C. Up to T ≤ +40 °C, a glycol admixture of 20 % to 40 % by volume is permissible. An alternative mechanical seal must be provided for water-glycol mixtures with a glycol content of > 40% to max. 50% by volume and a fluid temperature of > +40 °C to max. +120 °C or other fluids that differ from water. When using water-glycol mixtures, the use of an S1 variant with a corresponding mechanical seal is generally recommended.
Operating Data
Fluid media: Water 100 %
Fluid temperature: 20.00 °C
Requested flow:
Requested head:
Min. fluid temperature: -20 °C
Max. fluid temperature: 140 °C
Min. ambient temperature: 0 °C
Max. ambient temperature: 40 °C
Maximum operating pressure: 16 bar
Note on dimensioning: 16 bar to 120 °C, 13 bar to 140 °C
Minimum efficiency index (MEI): ≥ 0.4
Motor data
Motor efficiency class: IE3
Mains connection: 3~400V/50 Hz
Voltage tolerance: +-10 %
Rated power: 18.5 kW
Rated speed: 1,450 1/min
Rated current: 34.81 A
Power factor: 0.83
Motor efficiency 50%: 91.7 %
Motor efficiency 75%: 92.5 %
Motor efficiency 100%: 92.2 %
Insulation class: F
Protection class: IP55
Motor protection: PTC integrated
Materials
Pump housing: 5.1301, EN-GJL-250 cataphoretic-coated
Impeller: EN-GJL-200
Shaft: 1.4122
Shaft seal: AQ1EGG
Lantern: 5.1301/EN-GJL-250
Installation dimensions
Pipe connection on the suction side: DN 125, PN 16
Pipe connection on the discharge side: DN 125, PN 16
Ordering information
Brand: Wilo
Product description: Atmos GIGA-D 125/295-18,5/4
Net weight, approx.: 639 kg
Article number: 2225558
