SIGMA S2Ba - Manual (Page 20)

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Dulcodes UV-Desinfektionsanlage Product description S2Ba/S2Ca
2.2.5 Integrated overflow valve with bleeder function
Task:
The task of the overflow valve is to protect the motor and gear unit against impermissible
overpressure caused by the metering pump.
This function is produced by a spring-loaded ball.
A pressure relief mechanism for the bleeder function is provided.
Design and functional description
(refer to Fig. No. 6 and 7)
Initially, the overflow valve illustrated under item 102 operates as a simple directly controlled
safety valve. As soon as the pressure set with spring item 132 is exceeded, the effective pressure
raises ball item 130. The liquid then flows off into the tank via hose connection item 128.
Fig. 6
3160-4
Overflow valve Sigma/ 2 liquid end, 10 bar PVT Identcode Type: 12050, 12090, 12130
Overflow valve Sigma/ 2 liquid end, 7 bar PVT Identcode Type: 07120, 07220
Overflow valve Sigma/ 2 liquid end, 4 bar PVT Identcode Type: 04350
134
102
133
137
132
138
139*
131
202
203
126
125
127
136
128
130
111
112
100
110
114
115
118
200
201
117
101
113
116