Description; Technical Specification - Parker MAXIGAS serie Handbuch

2 Description

The MAXIGAS range of nitrogen generators operates on the Pressure Swing Adsorption (PSA) principle to produce a continuous stream of
nitrogen gas from clean dry compressed air.
Pairs of dual chamber extruded aluminium columns, filled with Carbon Molecular Sieve (CMS), are joined via an upper and lower manifold to
produce a two bed system. Compressed air enters the bottom of the 'online' bed and flows up through the CMS. Oxygen and other trace gases
are preferentially adsorbed by the CMS, allowing nitrogen to pass through.
After a pre-set time the control system automatically switches the bed to regenerative mode. All of the contaminants are vented from the CMS
and a small portion of the outlet nitrogen gas is expanded into the bed to accelerate the regeneration. At the same instant the second bed
comes on-line and takes over the separation process.
The lower purity (%) generators use an equalisation phase designed to reduce energy consumption and enhance the overall performance of the
generator. Immediately after the adsorption phase the inlet, outlet and exhaust valves close on both beds. The upper and lower equalisation
valves open, allowing the pressure to equalise between the beds.
Once equalised the bed entering regeneration is depressurised. The oxygen adsorbed during the adsorption phase is vented to atmosphere via
an exhaust valve and silencer. The bed entering the adsorption phase is pressurised using a controlled flow of nitrogen gas from the nitrogen
buffer vessel (Back Fill) and a controlled flow of clean, dry, particulate free compressed air (Front Fill).
The CMS beds alternate between separation and regeneration modes to ensure continuous and uninterrupted nitrogen production.
The oxygen concentration in the nitrogen stream is analysed continuously. If the concentration exceeds the required production level, the
nitrogen outlet is closed and the gas is vented to atmosphere. Normal operation will resume when the purity recovers.

2.1 Technical Specification

Parameter
Inlet Air Quality
Inlet Pressure
Inlet Temperature
Port Connections
Air Inlet
N2 Outlet to Buffer
N2 Inlet from Buffer
N2 Outlet
Supply Voltage
Power
Fuse
Ambient Temperature
Humidity
IP Rating
Pollution Degree
Installation Category
Altitude
Noise
Units
104
ISO 8573.1: 2001
barg
(psig)
o
C
o
( F)
V ac
(50/60Hz)
W
A
o
C
o
( F)
m
(ft)
dB(A)
MAXIGAS
106 108 110
Class 3.2.2
6 – 10 and 10 - 18
(88 – 145) and (145 - 261)
5 – 50
(41 – 122)
G1"
G1"
G1/2"
G1/2"
115 / 230 ± 10%
38
3.15
(Anti Surge (T), 250v, 5 x 20mm HBC,
Breaking Capacity 1500A @ 250v, UL Listed)
5 – 50
41 – 122
o
50% @ 40 C (80%
IP20 / NEMA 1
2
II
< 2000
(6562)
<75
6
112 116
o
31 C)
MAX
<80
120