Murphy EVS-2 Especificaciones descargar pdf (Pagina 19)

Section 20 00-02-0841

2013-01-14 - 15 -

Typical Vibration Alarm Settings of Various Installations

THE VALUES LISTED BELOW ARE GUIDELINES ONLY – Actual vibration limits must be

related to stress levels, which can be measured with strain gage equipment. In general, if

vibration levels are below the guidelines mentioned below, the stress levels are well below the

fatigue level of the equipment. If vibration problem is perceived, a spectral analysis should be

performed on the unit by a qualified specialist.

Type of Equipment

Velocity (IPS peak)

LOW

HIGH

Compressor, Centrifugal

0.2

0.4

Compressor, Reciprocating

0.5

0.7

Conveyors

0.3

0.5

Electric Motors

0.1

0.3

Engines

0.5

0.7

Fans, Blowers

0.2

0.4

Gear Boxes

0.1

0.3

Generator Sets, Electric Driven

0.2

0.3

Generator Sets, Engine Driven

0.5

0.7

Machine Tools (unloaded)

0.05

0.2

Pumps, Centrifugal

0.1

0.3

Pumps, Gear

0.1

0.3

Pumps, Reciprocating

0.5

0.7

Turbines

0.05

0.2

Reciprocating Compressor Vibration Setting Guidelines

THE VALUES LISTED BELOW ARE GUIDELINES ONLY – Cyclical failures generally occur

in the range of 10 to 100 cycles. High velocity at high frequency will result in failure at a much

greater rate than high velocities at a low frequency. Experience should also be a guideline in

determining acceptance limits for a particular compressor package.

Type of Equipment

Velocity (IPS peak)

(IPS)

(mm/sec)

Motor Frame

0.3 – 0.5

8 – 12

Compressor Frame

0.2 – 0.3

5 – 8

Compressor Cylinder (outer

end)

0.5 – 1.0

12 – 25

Pulsation bottles (outer center)

0.5 – 1.0

12 – 25

Skid Frame (top)

0.1 – 0.3

2.5 – 8

Scrubber (6’-6” elevation)

0.8 – 1.0

20 – 25

Piping (saddles and 12” spans)

0.5 – 0.8

12 – 20

PSV’s (top of valves)

0.6 – 0.8

15 - 20

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Murphy EVS-2 Especificaciones Pagina 19

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