RG

RG pumps, with an open impeller, comply with EN ISO 2858 and EN ISO 5199, which specify standard main dimensions, nominal working conditions, maximum shaft deflection, mechanical strength, and minimum bearing service life.

This series offers high efficiency, modular and interchangeable mechanical parts, and low NPSH values, along with a wide choice of mechanical seals.

Process pumps
Open impeller
ISO 2858-5199

Technical information

Use
Open Impellers for non abrasive solids, liquids with dissolved gas and critical suction conditions.

Efficiency
GirantiInvestment casting impellers for high efficiency.

Flexibility
12 different seal arrangements can be fitted in the same casing cover.

Modularity
3 different groups of bearing housing for 35 different sizes.

Discharge sizes
From DN 32 to DN 125.

Maximum working pressure
16 bar.

Flow rate
Up to 300 m³/hr.

Differential head
Up to 95 m.

Temperature
Up to 220°C according to the pumped liquid.

Flanges
EN 1092 PN16, on request ANSI B16.5 150 drilled.

Standard materials
AISI 316, Superduplex
(sizes from 32 to 80).

Materials on request
AISI 904L and other alloys.

2.900 rpm

1.450 rpm

Template Elem 1

Sub-1 Elem 1

Sub-1 Elem 2

Sub-2 Elem 1

Sub-2 Elem 2

Template Elem 2

Nosub Elem 1

Nosub Elem 2

Technical features

➊ 1 casing, 2 impellers

Every size of pumps can use a unique casing that both applies to closed impellers (provided with a wearing ring) and open impellers (with replaceable wearing plate).

This versatility allows the pump to be easily used in new plants and processes.

➋ 1 casing cover, 12 seal systems

For every size of pump, a unique casing can hold any kind, brand and choice of seal. The seal chamber dimensions are designed to guarantee an efficacious and correct liquid circulation.

By changing a few components, the seal arrangement can be easily modified, thus making the pump ready for new plant or process requirements and reducing the spares stock.

Mechanical Seals comply with EN 12756 standard.

➌ Heavy duty bearing housing EN ISO 5199

The bearing housing is standardized according to EN ISO 5199 and guarantees a shaft deflection <0,05 mm and a minimum of 18.000 working hours.

It is designed to optimize axial and radial thrusts as to drastically reduce operating temperatures. All bearing housings are suitable to host the heavy duty version “HD” which is equipped with angular contact bearings and roller bearings.

These series also include a stronger bearing housing able to operate up to 100.000 working hours.

➍ Wearing plate and adjustment

The replaceable wearing plate guarantees a long lasting pump’s lifetime and reduces maintenance costs.

Furthermore, bearing housing is equipped with axial adjustment of clearances that is easily accessible from drive side.