<3. Maintenance>
17
IM 01F07A01-02EN
a. In the case of a high temperature type instrument with option code /SPG, tighten the bolts
once to tightening torque value A, then loosen the bolts and tighten them again to tightening
torque value B. When loosening the bolts, stop once they are partially loosened, and do not
loosen them completely.
Table 3.1 Tightening Torque Values
Model code/Type of body Tightening torque [N·m]
-0: General type
-1: Reduced
bore type
(1 size
reduction)
-2: Reduced
bore type
A, B: General
type,
E: Cryogenic
type
C, D: High temperature
type,
/SPG
A B
VY015-0 VY025-1 VY040-2 16 16 *1 16 *1
VY025-0 VY040-1 VY050-2 12 18 12
VY040-0 VY050-1 VY080-2 12 18 12
VY050-0 VY080-1 VY100-2
12 *2 18 *2 12 *2
18 *3 27 *3 18 *3
VY080-0 VY100-1 VY150-2
21 *2 32 *2 21 *2
32 *3 48 *3 32 *3
VY100-0 VY150-1 VY200-2
21 *2 32 *2 21 *2
49 *3 74 *3 49 *3
VY150-0 VY200-1 ----- 69 98 69
VY200-0 ----- ----- 69 98 69
VY250-0 ----- ----- 157 210 140
VY300-0 ----- ----- 157 210 140
VY400-0 ----- ----- 160 240 140
*1: For /SPG (stainless steel gasket plated with silver) only
*2: For ASME/JPI Class 150, 300 JIS 10K, 20K, and EN PN 10, 16, 25, 40
*3: For ASME/JPI Class 600, 900, and JIS 40 K
Table 3.2 Tightening Torque Values (High Pressure Reduced Bore Type)
Model code/Type of body
Tightening torque [N·m]
-4: High pressure reduced bore type
(1 size reduction)
VY025-4 12
VY040-4 37
VY050-4 37
VY080-4 37
VY100-4 50
VY150-4 78
CAUTION
For instruments with custom specications, make sure to read the accompanying manual.
b. After replacing the shedder bar, take care not to damage the sensor cable when installing
the bracket and transmitter case.
c. After assembly, make sure that no uid leaks from the vortex owmeter.
3.6 Replacing the Lightning Protector Module
For details on replacing the lightning protector module, read the Vortex Flowmeter VY Series
Installation Manual listed in the related documents in Table 1.1.
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