Engineering manual - SAB 355 Screw compressor unit (including ATEX)
004100 en 2020.10
69/156
Technical description
4.1.33 General key to piping diagram
Pos. no.
Designation In-operation position
101
Suction stop valve
Open
102
Stop valve after oil separator
103
Change over valve
Open to safety valve,
no. 1 or no. 2
104/PSV1
Safety relief valve (Closed) Fixed set point
105/PSV1
Safety relief valve (Closed) Fixed set point
106
Service valve for oil drainage Closed
107
Purge valve Closed
108 Service valve
“Pump out”/Closed
113
Service valve, pressure transducer
Open
114
Stop valve, suction check valve by-pass
Open
115 Check valve
116 Oil level indicators
117 Oil level indicators
119
Stop valve before oil filter
Open
120
Oil temperature regulating valve Fixed set point
121
Service valve, oil filter Closed
122
Service valve, pressure transducer
Open
123
Stop valve after oil filter
Open
124
Regulating valve (oil flow)
Open (partly)
Adjusted according to manual
125
Service valve, pressure transducer
Open
126
Cold-start discharge valve Opens automatically
127
Compressor protection valve
(Closed)
Controlled by pilot valve
128
Pilot valve for pos. 127 (Closed) Fixed set point
129 Suction check valve
200
Stop valves - oil return
Open
135
Stop valve before oil filter, Oil filter 1 Open when filter is in use
136
Stop valve before oil filter, Oil filter 2 Open when filter is in use
123
Stop valve after oil filter, Oil filter 1 Open when filter is in use
138
Stop valve after oil filter, Oil filter 2 Open when filter is in use
137 Service valve - oil filter
(Closed)
139
Non-return valve (check valve)
140 Check valve
141
142
143
144
Strainer before oil pump
145
146
Oil pump
149
Stop valve before oil pump
Open
151
Suction gas temperature
152
Discharge gas temperature
153
Lubricating oil temperature
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