- Depending on the operating condi1ions (so, not always):
a solenoid valve controlled, servo-operated (by gas press
ure) by-pass valve (31), mounted in a by-pass line
between oil separator and suction side of the paokage.
When the package is stopped, 1he solenoid valve is en
ergized, causing the by-pass valve to open and the press
ure inside the package to equalize. The minimum
pressure dîfference to open the valVe is 0.2 bar.
- A. pressure gauge and safety switch cabinet. in which
most of the measuring and safety devices (30) of the
package are installed. For more details about these and
other instrumen1s, refer to para. 3.5 •1nstrurnents and
safety devices".
13
12
.,,
17
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10
9
8
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The necessary stop vaJves (13). check valves {22) and
small si2ed valves (12)
tor
îsolating, charging or draJning
the compressor package or parts of it.
- An eêonomîzer manifold (50, if present) fitted to the stand
ard economizer connection(s) on the compressor housing
(see also 34 and 35 in figure 2.3). The inlet pipe of this
manifold, which fs to be connecied to the economizer
cooler of the plant, is provjded wfth a stop valve, a check
valve and a strainer.
All components and the interconnecting piping are assem
bied on a solid steel base frame (6). Figure 3.6 shows how
a complete standard package lookes like in reality.
1 . oil sep"1-ra1or
2. eiectrlc drive motor
3. oil cooler
4. oll pressure regutaior
5. oil d,scriarge man,lold
6. screw oompressor GSL
7. elèèlTic Slide vaJve actuator
8. lubrication oil pump
9. main flow oif filter
10. ltèxlble couphng w1m safety g\lard
11
.
pressure gauge and safety swrrch cabrne1
12. conll'OI cabfnet
13. oil level slghtglass
, 4. heatir,g element
15. dlscharge stop valve
1 � dl schat ge check Il alve
17, sprîng-loaded pressure safety valve
18. by-pass valve.
1 9. ,niet device�
suction s10p valve
suCl>On check valve
suctîon strainer
20.
on
straîner
21. gas P(essure equalrzlng line
FIG. 3.6 COMPONENT IDENTIFICATION OF STANDARD PACKAGE GSLP
92.01
Compressor Package GSLP
Page 3.7
