ARI Armaturen STEVI BBD 415 DN 25-50 EN - Manual

Rev. 0040321000 0714 englisch page 2-1
Contents
Operating and Installation Instructions
Straight-through blow-down valves - STEVI
®
BBD 415
DN 25 - 50
1.0 General information about these
Operating Instructions ................................2-2
2.0 Notes on possible dangers.........................2-2
2.1 Meanings of the symbols used............................ 2-2
2.2 Explanatory notes on safety information ............. 2-2
3.0 Storage and transport ................................2-2
4.0 Description...................................................2-3
4.1 Applications......................................................... 2-3
4.2 Operating principle .............................................. 2-3
4.3 Diagrams ............................................................ 2-4
4.4 Technical data ..................................................... 2-6
4.5 Marking ............................................................... 2-6
5.0 Installation....................................................2-7
5.1 General notes on installation............................... 2-7
6.0 Putting the valve into operation.................2-8
7.0 Care and maintenance ................................2-9
7.1 Replacing the valve stem seals........................... 2-9
7.1.1 PTFE V-ring unit design ................................. 2-9
7.2 Replacing the valve trim.................................... 2-10
7.3 Replacing the rolling diaphragm and springs .....2-11
7.4 Replacing the actuator stem seals .................... 2-13
7.5 Assembling the valve and the actuator ............. 2-13
7.6 Retrofitting the hand lever ................................. 2-13
7.7 Tightening torques............................................. 2-14
7.7.1 Tightening torques for hexagon nuts .......... 2-14
7.7.2 Tightening torques for flange nuts ............... 2-14
7.7.3 Tightening torques for studs ........................ 2-14
8.0 Troubleshooting ........................................ 2-14
9.0 Troubleshooting table ............................. 2-15
10.0 Dismantling the valve ............................ 2-16
10.1 Dismantling the actuator from the valve .......... 2-16
10.2 Dismantling the actuator.................................. 2-16
11.0 Warranty / Guarantee .............................. 2-17
12.0 EC declaration of conformity ................. 2-18
Series 415