48
REV
AL 182
EN
Use, maintenance and warning instructions
MEDIUM PRESSURE REGULATOR
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DESCRIPTION AND OPERATION
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REV. 00
4.5.3.1 - BUILT-IN SLAM-SHUT VALVE SA
The SA built-in slam-shut valve is controlled by pressure switch mod. SA-91, SA-92, SA-93 and can be operated:
• by the pressure switch;
• manually;
• with remote control.
The main features of the SA built-in slam-shut valve are:
• tripping due to downstream pressure increase and/or decrease;
• design pressure: 18.9 bar for all accessory components;
• local shut-off button;
• rearming without the need for a bypass thanks to the balanced plug.
Pressure switch type
Set
Operating range (bar)
AG
SA/91
max
0.025 - 1.1
10
SA/92
max
0.7 - 2
10
max
2 - 5
5
SA-93
max
3 - 4
10
max
4 - 13.3
5
Tab. 4.22.
* For the calibration values of the minimum spring, please refer to chapter 13 'Calibration tables'
The SA built-in slam-shut valve consists of (see Fig. 4.11):
Pos. Description
1
Plug
2
Control pressure switch
3
Reset system (manually operated through a lever)
Tab. 4.23.
Summary of Contents for REVAL 182
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