Option Ball Valve Drives; Option Pneumatic Drive Ms1 Or Ms3 When Using A 2/2-Way Ball Valve /Va; Figure 13 Pneumatic Drive For 2/2-Way Ball Valve - M&C SP Series Instruction Manual

 For sampling operation turn handle to mid position.
 For blow back turn handle from mid to left positon up to stop.
 For test gas feeding turn handle from mid to right position up to stop.
 For measuring operation turn handle back to mid position.
16.3

OPTION BALL VALVE DRIVES

For external control of the probe internal ball valves there is the possibility to use a pneumatic drive with return
spring type MS1, MS3 (for 320 °C [608 °F]) or an electric drive EA.
16.3.1

OPTION PNEUMATIC DRIVE MS1 OR MS3 WHEN USING A 2/2-WAY BALL VALVE /VA

Ball valve open = measuring operation
Ball valve closed = e.g. changing filter element at process excess pressure or toxic sample gas or test gas feeding
with option check valve /R without loss of test gas into the process.
Figure 13 Pneumatic drive for 2/2-way ball valve
When placing the order it shall be specified whether the ball valve should be
NC, without control air closed, or
NO, without control air open and hence switched to measuring.
Standard = NC
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