Murphy EVS-2, Инструкция по установке и эксплуатации

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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
Scrubb
er (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
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