Pump Description; Type Designation - Johnson Pump TG GS2-25 Instruction Manual

2.0 Pump description

TopGear/GS pumps are rotary positive displacement pumps with internal gear. They are made of
cast iron. TG GS pumps: heating / cooling jackets (steam), several sleeve bearings, gear and shaft
materials and mounted relief valve.
2.1

Type designation

The pump properties are encoded in the following type indication, which is to be found on the
nameplate.
Example:
TG
1
1. Pump family name
TG = TopGear
2. Pump range name
G = General purpose
S = Single mechanical seal - shaft bearings outside the liquid
3. Hydraulics indicated with displacement volume per 100 revolution (in dm
nominal port diameter (in mm)
TG
TG
TG
TG
TG
TG
TG
TG
4. Pump material
G
5. Port connection type
1
2
3
6. Jacket options for pump cover
O
S
12
GS 58-80 G
2 3 4
GS2-25
GS3-32
GS6-40
GS15-50
GS23-65
GS58-80
GS86-100
GS185-125
Pump in cast iron
Thread connections
PN16 flanges to DIN2533
PN20 flanges to ANSI 150 lbs
Pump cover without jackets
Pump cover with jacket and thread connection
2 S SG 2
5 6 7 8
A.0500.501 – IM-TGGS/05.01 EN (03/2013)
G1 AV
9 10
) and
3