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|Query:||Thank you for for the speedy reply to my quarries|
|Query:||Vibration limits with respect to speed & height of Vertical mounted pumps is required|
|Answer:||VIBRATION FOR VERTICAL MOUNTED PUMPS
Vertically mounted pump systems with a "Vertical Mount Height" greater than 5 feet will have an allowable increase in Velocity Amplitude Acceptance Limits in Bands 1, 2, and 3 of 5% per foot of "Vertical Mount Height" greater than 5 feet. (e.g. A 7 foot Vertical Mount Height would yield a 10% increase [(7 ft - 5 ft) x 5%/ft]
Velocity Amplitude Acceptance Limits specified for Bands 1, 2, and 3. Therefore the limit for Band 1 would be [0.4 Inch/sec + (0.4 Inch/sec x 0.1)] = 0.44 Inch/sec-Peak.
Vertical Mount Height is defined as the furthest measurable distance from the machine mounting to the end of the driver or the end of the pump, which ever is greater.
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|Query:||which tariff is applicable for Mineral water plant of 5 HP Load & for 15 HP Load?|
|Answer:||industrial tariff 3b irrespective of load|
|Query:||Sir Whether Board Contribution under CPS scheme is Taxable? details regarding this please.circular or rule number of Income tax department supporting this|
|Answer:||Forwarded to Admin section.... Answer will be posted shortly....
|Query:||why orifice meters are preferred for high pr lines? why not venturimeters?|
the difference between venturi and orifice meters :
1. The orifice plate can easily be changed to accomodate
widely different flow rates, whereas the throat diameter of
a venturi is fixed, so that its range of flow rates is
circumscribed by the practical limits of Dp.
2. The orifice meter has a large permanent loss of
pressure because of the presence of eddies on the downstream
side of the orifice-plate; the shape of the venturi meter
prevents the formation os these eddies and greatly reduces
the permanent loss.
3. The orifice is cheap and easy to install. The venturi
meter is expensive, as it must be carefully proportioned and
fabricated. A home made orifice is often entirely
satisfactory, whereas a venturi meter is practically always
purchased from an instrument dealer.
4. On the other hand, the head lost in the orifice for
the same conditions as in the venturi is many times greater.
The power lost is proportionally greater, and, when an
orifice is inserted in a line carrying fluid continuously
over long periods of time, the cost of the power may be out
of all proportion to the saving in first cost. Orifices are
therefore best used for testing purposes or other cases
where the power lost is not a factor, as in steam lines.
5. However, in spite of considerations of power loss,
orifices are widely used, partly because of their greater
flexibility, because installing a new orifice plate with a
different opening is a simpler matter. The venturi meter can
not be so altered. Venturi meters are used only for
6. It should be noted that for a given pipe diameter and
a given diameter of orifice opening or venturi throat, the
reading of the venturi meter for a given velocity is to the
reading of the orifice as (0.61/0.98)2, or 1:2.58.(i.e.
orifice meter will show higher manometer reading for a given
velocity than venturi meter).
AN VENTURIMETER IS CONSISTING OF DIVERGENT&CONVERGENT PORTION IN THE INLET & OUTLET WHEREAS AN ORIFICE VENTURIMETER CONSISTING OF INLET&OUTLET TO BE SAME WITH CIRCULAR THROAT AT THE CENTER. THE DISCHARGE OF AN ORIFICEMETER IS ALWAYS HIGHER THAN THE VENTURIMETER.
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|Name:||M Senthil kumar|
|Query:||Is there any sincere efforts to get pay commission? or Is these the efforts to cool the members of Engg. community?|
|Query:||Filing Any civil suit in the name of employee(pure personal case like land dispute etc) requires permission from BOARD????|
|Answer:||no,if the property is not in the property return filed by the employee|
|Query:||Kinldy provide a write up of our SCADA to update our engineers working in various fields.|