KOREAN
JAPAN
R&D Center
This is the NSV R&D center, which leads technical
development in the noise, vibration, and shock fields.
Introduction of the R&D Center
NSV Introduction of the R&D Center
Equipment Holdings
NSV Equipment Holdings
Research field
NSV Research field
Engineering Performance
NSV Engineering Performance
Product selection guide
NSV Product selection guide
Product selection guide
VIBRATION ISOLATION REFERENCE TABLE
Type Power and
capacity		 Revolution
per minute		 Installation location Remarks
Slab on Grade Floor span
Up to 6m 6 to 9m 9 to 12m
Base
Type		 Isolator
Tye		 Min Defl.,
mm		 Base
Type		 Isolator
Tye		 Min Defl.,
mm		 Base
Type		 Isolator
Tye		 Min Defl.,
mm		 Base
Type		 Isolator
Tye		 Min Defl.,
mm
Refrigeration
Machines
and Chillers		 Reciprocating All All A 2 6.4 A 4 19 A 4 38 A 4 64 2,3,12
Centrifugal,
Scroll		 All All A 1 6.4 A 4 19 A 4 38 A 4 38 2,3,4,8,12
Screw All All A 1 25 A 4 38 A 4 64 A 4 64 2,3,4,12
Absorption All All A 1 6.4 A 4 19 A 4 38 A 4 38
Air Cooled
recip., Scroll		 All All A 1 6.4 A 4 38 A 4 38 A 4 64 2,4,5,12
Air Cooled
Screw		 All All A 4 25 A 4 38 B 4 64 B 4 64 2,4,5,8,12
Air
Compressors
and
Vacuum
Pumps		 Tank-mounted
hortz.		 ≥ 7.5 All A 3 19 A 3 19 A 3 38 A 3 38 3,15
≥ 11 All C 3 19 C 3 19 C 3 38 C 3 38 3,15
Tank-mounted
vert.		 All All C 3 19 C 3 19 C 3 38 C 3 38 3,15
Base-mounted All All C 3 19 C 3 19 C 3 38 C 3 38 3,14,15
Large
reciprocating		 All All C 3 19 C 3 19 C 3 38 C 3 38 3,14,15
Pumps Close-coupled ≥ 5.6 All B 2 6.4 C 2 19 C 2 19 C 3 19 16
≥ 7.5 All C 3 19 C 2 19 C 2 19 C 3 38 16
Large Inline 37 to 19 All A 3 19 A 3 38 C 3 38 A 3 38
≥ 22 All A 3 38 A 3 38 C 3 38 A 3 64
End suction
and split case		 ≥ 7.5 All C 3 19 C 3 19 A 3 38 C 3 38 16
37 to 93 All C 3 19 C 3 19 A 3 38 C 3 64 10, 16
≥ 110 All C 3 19 C 3 38 C 3 64 C 3 89 10, 16
Packaged
pump systems		 All All A 3 19 A 3 19 C 3 38 C 3 64
Cooling
Towers		 All All Up to 300 A 1 6.4 A 4 89 C 4 89 A 4 89 5, 8, 18
301 to 500 A 1 6.4 A 4 64 A 4 64 A 4 64 5, 18
501 to up A 1 6.4 A 4 19 A 4 19 A 4 38 5, 18
Bollers Fire-tube All All A 1 6.4 B 4 19 A 4 38 B 4 64 4
Water-tube,
copper fin		 All All A 1 3 A 4 3 B 4 3 B 4 6.4
Axial Fans,
Plenum Fans,
Cabinet Fans,
Fan Sections,
Centrifugal,
Inline Fans		 Up to 560mm,
diameter		 All All A 2 6.4 A 1 19 B 1 19 C 3 19 4,9
610mm
diameter
and up		 ≥ 50 Pa SP Up to 300 B 3 64 C 3 89 A 3 89 C 3 89 9,8
301 to 500 B 3 19 B 3 38 A 3 64 C 3 64 9,8
501 to up B 3 19 B 3 38 C 3 38 B 3 38 9,8
≥ 501 Pa SP Up to 300 C 3 64 C 3 89 C 3 89 C 3 89 3,8,9
301 to 500 C 3 38 C 3 38 C 3 64 C 3 64 3,8,9
501 to up C 3 19 C 3 38 C 3 38 C 3 64 3,8,9
Centrifugal
Fans		 Up to 560mm,
diameter		 All All B 2 6.4 B 3 19 C 3 19 B 3 38 9,19
610mm
diameter
and up		 ≥ 30 Up to 300 B 3 64 B 3 89 B 3 89 B 3 89 8,19
301 to 500 B 3 38 B 3 38 B 3 64 B 3 64 8,19
501 and up B 3 19 B 3 19 B 3 19 B 3 38 8,19
≥ 37 Up to 300 C 3 64 C 3 89 C 3 89 C 3 89 2,3,8,9,19
301 to 500 C 3 38 C 3 38 C 3 64 C 3 64 2,3,8,9,19
501 and up C 3 25.4 C 3 38 C 3 38 C 3 64 2,3,8,9,19
Centrifugal
Fans		 All All All A 1 6.4 A 4 19 C 4 38 AVD 4 38
Centrifugal
Fans		 All All All A 1 6.4 A 4 19 C 4 38 AVD 4 38
Packaged AH,
AC, H and
V units		 All ≥ 7.5 All A 3 19 A 3 19 A 3 19 A 3 19 19
≥ 11 Up to 300 A 3 19 A 3 89 A 3 89 C 3 89 2,4,8,19
≥ 1 kpa Sp 301 to 500 A 3 19 A 3 64 A 3 64 A 3 19 4,19
501 and up A 3 19 A 3 38 A 3 38 A 3 38 4,19
> 1 kpa sp11 Up to 300 B 3 19 C 3 89 C 3 89 C 3 89 2,3,4,8,9
> 1 kpa Sp 301 to 500 B 3 19 C 3 38 C 3 64 C 3 64 2,3,4,9
501 and up B 3 19 C 3 38 C 3 38 C 3 64 2,3,4,9
Base Type
> TYPE A
≥ No Base
> TYPE B
≥ Structural steel rails or base
> TYPE C
≥ Concrete inertia base
> TYPE D
≥ Curb-mounted base
Isolator Type
> TYPE 1
≥ Rubber Pad
> TYPE 2
≥ Rubber Mount
> TYPE 3
≥ Spring Isolator
> TYPE 4
≥ Restrained Spring Isolator
> TYPE 5
≥ Thrust Restraint
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