ARI Armaturen STEVI BBD 415 DN 25-50 EN - Manual (Page 7)

Rev. 0040321000 0714 Page 2-7
Operating and Installation Instructions
Straight-through blow-down valves - STEVI
®
BBD 415
5.0 Installation
5.1 General notes on installation
The following points should be taken into account in addition to the general principles
governing installation work:
ATTENTION !
- Remove flange covers if present.
- The interior of the valve and pipeline must be free from foreign particles.
- Note the installation position in relation to the flow (see mark on valve).
- When installing the valve, allow a sufficient clearance to retrofit the hand lever
for emergency operation.
- Steam line systems should be designed to prevent water accumulation
(alternatively, the pipeline should be drained prior to blowing down the boiler).
- Lay pipelines so that damaging shear, bending or torsional forces are avoided.
- The pipeline between the boiler and the blow-down valve should not be more
than two metres long.
- Protect valves from dirt during construction work.
- Connection flanges must mate exactly.
- Connecting bolts for pipe flanges should be mounted preferably from the
counter flange side (hexagon nuts from the valve side).
At DN15-32: If valves should be mounted directly to valves, the upper flange
connecting bolts should be preferably executed with studs and hexagon nuts on
both sides.
- Valve mountings such as actuators, handwheels, bonnets, etc. must not be
used to absorb external forces, e.g. they are not designed to be used as
climbing aids or as attachment points for lifting gear.
- Suitable handling and lifting equipment must always be used when installing the
valve.
Refer to the data sheet for weights.
- Keep the thread and shaft of the stem free from paint.
- Centre the gaskets between the flanges.
- Observe the information provided in the Operating Instructions for the various
accessories (e.g. the solenoid valve).
- The valve should be installed complete with the crossbar.
- Choose the optimum line cross-section according to the available driving power
and line length.
- The technical data of the actuator unit must be compatible with the operating
requirements.
- The control pressure must match the information given on the rating plate of the
actuator unit.
- Air supply acc. to DIN IEC 60654-2.
- Water free from dirt and corrosives, max. temperature +80°C
- The complete actuator unit must be mounted on the valve, including the
distance columns and coupling parts provided for this purpose.
- All persons charged with installing compressed air systems must be familiar
with the applicable rules and regulations.