MAXIMATOR SLGP 3 Series Installation And Operating Manual page 14

Product description
Design of SLGP 3-3 and GLGP 5-5 (air reversal, with control air, two-stage)
1
2
3
4
5
Functional description SLGP 3, SLGP 3-3, GLGP 5, GLGP 5-5
The operating principle of a liquefied gas pump is similar to that of a pressure in-
tensifier. Low pressure is applied to the large area of the air piston (1) which ap-
plies high-pressure to the small area of the high-pressure piston (2).
The piston of the pump performs oscillating movements until the stall pressure is
reached. In so doing, the high pressure piston delivers and compresses the con-
veyed fluid by means of the check valves in gas inlet (A) and gas outlet (B).
The outlet pressure results from the set drive pressure, primary pressure and vol-
ume flow.
The continuous supply is achieved by means of an internally controlled direction-
al valve, the spool valve (5). The spool valve alternately guides the drive fluid to
the two sides of the air piston.
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Air piston
High-pressure piston
Pilot valve lower cap
Pilot valve top cap
Control slide valve
A Gas inlet
B Gas outlet
PL Drive air port
E Exhaust port
V Spool valve air supply port
Y Pilot valve air supply port
X Pilot port
0000000383 - 001 - EN