Spomasz Zamość S.A.

The producer of the machines and accompliances for the food industry

GH-20 pump

General information

Pumping capacity of 21,0m³/h, with a lifting height of 20mH2O and drive power required of 2,2kW.

The single-stage GH-20 pump is an improved version of the GA-type pumps, used for pumping milk.

The GH-series pumps have been designed to introduce hygienic solutions to pumps with basic parameters used in the food industry. The pump parameters and the connection dimensions correspond to the GA-series pumps.

The pumps have been designed to meet the current requirements for food industry applications. The GH-20 pumps are all made of acid-proof steel: the pump bodies and all other parts are made of 1.4404 (316L) steel, with an inner surface roughness of ≤0.8µm, the body containing a washable body seal and other elements.

GH-20 pump GH-20 pump

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The GH-20 pump is designed for transporting non-condensed or condensed food liquids with a dry substance content of up to 50%, or other food products of similar properties, and a temperature up to 95°C.

The pump may be used in systems where food safety is crucial.
Models with hygienic mechanical seals are available - they provide full safety for the pumped media.
Pumps with an internal element surface roughness ≤0.4µm are also available.

The pump may be used for:

  • transporting food liquids of viscosity up to 1000 cP,
  • dairy industry (milk, both fresh and pasteurized, whey, and liquid ice-cream mixes),
  • fruit-and-vegetable processing (thick juices, clarified juice, juices with fibre, fruit beverages, vegetable beverages, wines and fruit liqueurs),
  • distilling of alcohol (cereal mash and spirit products),
  • pharmacy
  • pumping basic media in food industry (water, hot or cold purified water),
  • CIP system washing liquids,
  • other liquids

*after material set is agreed on

General characteristics

The GH-20 is a centrifugal pump and, together with its motor, is constructed as a closed, monolithic structure with 4 ball-shaped legs, adjustable to allow the pump to be levelled.
The pump rotor is open and mounted on an extended shaft of the drive motor. The outer body is mounted with dome screws on the pump body. There is an O-ring placed between the outer body and the pump body so that it is possible to wash it using the CIP system.
The outer body and the pump body are both made of thick steel sheets, specially shaped by plastic forming to provide suitable pump durability and reliability.
Rd connector pipes with an external thread designed according to DIN 11851.
Pump components coming into contact with the pumped medium are made of AISI 316. (1.4404) acid-proof steel, and of AISI 304 (PN-EN 1.4301) steel for the remaining elements, such as the casing and the base.
Shaft sealing: double end-face mechanical - with the washing liquid (water), or single; the sealing material selected to suit the medium pumped.

Sealing sets available for the standard version:

Rubbing couples:
impregnated carbon/silicon carbide,
silicon carbide/silicon carbide,
impregnated carbon/ceramic.
Rubber materials:
Ethylene propylene EPDM
Fluoroelastomer (VITON)
Nitrile (NBR)

Other sealing materials available by request.

Advantages, certificates

The following advantages of the pump are worthy of notice: user-friendliness, low energy consumption, hygiene by design, easily washable components, and transportability (does not require a base).

The pumps are certified for use in the food industry, and have a declaration of conformity issued and CE certification.


The GH-20 pump parameters
Characteristic units  
capacity* [m³/h] 21,0
lifting height* [mH2O] 20,0
rotor diameter [mm] 130
drive motor type   SLg 90L-2
rated current/voltage [A/V] 4,6/400
motor power [kW] 2,2
rotation of engine [min-1] 2845
mass [kg] 52,0

* The values are for clean cold water.

Overall dimensions of the GH-20 pump

The GH-20 pump intersection - single sealing

The GH-20 pump intersection - single sealing

No. Part name Amount
1 Electric motor SLg90L-2 2,2 kW / 2845 rpm. 1
2 Pump body 1
3 Thrower ring 1
4 Stud-bolt M10 10
5 End-face seal 1
6 Distance ring 1
7 Rotor ø130 1
8 Dome nut 1
9 Dome nut gasket 1
10 Body sealing 1
11 Outer body 1
12 Pump base 1
13 Ball-shaped leg 4
14 Engine casing 1
15 Parallel key A6x6x16 1

GH-20 characteristics

GH-20 characteristics