M&C TechGroup SP2400-H Operator's manual - Manual (Page 30)

30 Gas sampling and gas conditioning technology 2-1.1-ME
16.3.2 OPTION PNEUMATIC DRIVE MS1 OR MS3 WHEN USING A 3/2-WAY BALL
VALVE /3VA
1. Measuring and blow back MS-B
2. Measuring and test gas feeding MS-C
Figure 14 Pneumatischer Antrieb für 3/2-Wege Kugelhahn
When placing the order it shall be specified whether the ball valve should be
NC
, without control air closed resp. switched to test gas feeding or blow back, or
NO
, without control air open and hence switched to measuring.
Standard = NC