Vibra Trol™
To address the ever increasing issue of controlling/dampening vibration in mechanical, refrigeration, and HVAC
installations, B-Line offers the following vibration and isolation products. It is our continuing effort to offer industry
with quality support products that meet the demands of today’s construction environment.
The following pages depict isolation and vibration control products that are commonly specified and required on
piping and equipment, but not limited to, mechanical rooms. As an aid in choosing the proper vibration control
device, the chart shown on the following page is a reference for obtaining Vibration Isolation Efficiency.
Considerations must be given to the desired deflection and the amount of disturbing frequency (R.P.M.).
Vibra Trol
All dimensions in charts and on drawings are in inches. Dimensions shown in parentheses are in millimeters unless otherwise specified.
249
Pipe Hangers & Supports
Vibra Trol™ Data
Selection
Disturbing
Frequency
(RPM)
1/16"
1/8"
1/4"
1/2"
1"
2"
250-299
300-349
350-399
400-449
450-499
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
74%
79%
N/R
76%
83%
87%
90%
500-599
600-699
700-799
800-899
900-999
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
78%
N/R
75%
83%
87%
90%
83%
89%
92%
94%
95%
92%
95%
96%
97%
98%
1000-1099
1100-1199
1200-1299
1300-1399
1400-1499
N/R
N/R
N/R
N/R
N/R
N/R
N/R
83%
86%
89%
83%
86%
89%
91%
92%
92%
94%
95%
97%
97%
96%
97%
97%
98%
98%
98%
99%
99%
99%
99%
1500-1599
1600-1699
1700-1799
1800-1899
1900-1999
N/R
N/R
75%
78%
80%
90%
91%
93%
93%
94%
93%
94%
95%
95%
96%
97%
97%
97%
98%
98%
99%
99%
99%
99%
99%
99%
99%
99%
99%
99%
2000-2249
2250-2499
2500-2999
3000-3499
3500-3999
82%
85%
87%
88%
90%
95%
95%
96%
97%
98%
96%
97%
97%
98%
98%
98%
98%
98%
99%
99%
99%
99%
99%
99%
99%
99%
99%
99%
99%
99%
Isolator Deflection
V
I
B
R
A
T
I
O
N
I
S
O
L
A
T
I
O
N
E
F
F
I
C
I
E
N
C
Y
Critical Installations 96% to 99% Vibration Isolation
Efficiency recommended (only 1% to 4% of disturbing
vibration transmitted).
Typical installations: TV and Radio Broadcast Studios,
Concert Halls, Libraries, Churches, Hospitals, Schools and
Universities, Hotels, Private Offices, Theaters, Recording
Studios
Standard Installations 90% to 95% Vibration Isolation
Efficiency recommended (only 5% to 10% of disturbing
vibration transmitted).
Typical installations: Computer Equipment Areas,
Restaurants, Shopping Malls, Gymnasiums, Health Clubs
and Spas, Sports Arenas, Indoor Swimming Pools, Building
Service Areas, Night Clubs, General Office Buildings
Non-Critical Installations 75% to 89% Vibration
Isolation Efficiency recommended (only 11% to 24% of
disturbing vibration transmitted).
Typical installations: In factory Offices, Motor Vehicle
Inspection Stations and Facilities, Laundramats, Roller and
Ice Skating Rinks, Factory Production Areas
For 1/16" (1.6) deflection: Specify B-Line series NNP Ribbed
Neoprene Pads.
For 1/8" (3.2) deflection: Specify B-Line series CNP
Combination Cork and Ribbed Neoprene Pads or B-Line
Series VRP Pads.
For 1/4" (6.3) deflection: Specify B-Line series N Neoprene
Mountings or B-Line series RH Neoprene Hangers.
For 1/2" (12.7) deflection: Specify B-Line series ND
Neoprene Mountings or B-Line series RH Neoprene
Hangers.
N/R = Not Recommended
For 1"-2" (25.4-50.8) deflection: Specify B-Line series HM
Housed Spring Mountings or B-Line series OM Open
Spring Mountings or B-Line series HS Spring Hangers.
For larger deflection requirements, consult factory.
Proper Sizing
Sizing: Divide weight of equipment by points of support to determine load requirement per support.
Example: 240 Lb. (90.7 kg) piece of equipment, 4 support points, take 240 x 1.25 = 300 Lbs.
measure), then take 300 ÷ 4 = 75 Lbs. (34.0 kg) Specify appropriate vibration device
rated at 75 Lbs. (34.0 kg) for each of the support points.
(136.1kg) (safety
If weight of equipment is unequally proportionate, select mounts to satisfy the weight distribution.
All dimensions in charts and on drawings are in inches. Dimensions shown in parentheses are in millimeters unless otherwise specified.
Pipe Hangers & Supports
250
Vibra Trol
Once it is determined as to what type of vibration dampening device is needed, weight loading is the next
crucial step. As a built in safety measure, take the actual weight of supported pipe or equipment (consider all
accessories - i.e. valves, insulation, brackets, etc...) and multiply by 1.25. Then refer to the sizing chart for the
selected product to determine part number.