Yamatake Corporation Maintenance and Troubleshooting
ST3000 Smart Transmitter Series 900 Electronic Differential Pressure/Pressure Transmitter 7-11
Table 7-1 Cover Bolts / Nuts and Tightening Torque
Table 7-2 Adapter Flange Bolt / Nut Tightening Torque
Model No.
Wetted parts
material
(other than
diaphragm)
Bolt/Nut
Material
Bolt/Nut tightening torque N·m
Cover material
Carbon steel/Stainless steel
Cover material
PVC
When new gasket is
used
When existing
gasket is reused
When new / existing
gasket is used
STD910 SUS316 SUS304 35±2 20±1 -
STD920
STD930
SUS316
Hastelloy C
Carbon steel
22±2 17±1
10±1
SUS630 -
SUS304 15±1 10±1 -
STD920
STD930
Tantalum
SUS316L
Carbon steel 45±2 30±1.5 15±1
SUS630 -
SUS304 35±2 20±1 15±1
STD960
SUS316
Hastelloy C
Tantalum
SUS316L
Carbon steel
SUS630
45±2 30±1.5 -
SUS304 35±2 20±1 -
STD921
STD931
STD961
SUS316
Carbon steel
SUS630
280±30 -
SUS304 170±20 -
STG940
STG960
SUS316
Hastelloy C
Carbon steel
22±2 17±1
10±1
SUS630 -
SUS304 15±1 10±1 10±1
STG940
STG960
Tantalum
SUS316L
Carbon steel
45±2 30±1.5
15±1
SUS630 -
SUS304 35±2 20±1 15±1
STG981
SUS316
Hastelloy C
Carbon steel
SUS630
90±20 -
SUS304 55±20 -
STA923
STA940
SUS316
Hastelloy C
Tantalum
SUS316L
Carbon steel
SUS630
45±2 30±1.5 -
SUS304 35±2 20±1 15±1
STC929 SUS316
Carbon steel
SUS630
22±2 17±1 -
SUS304 15±1 10±1 -
Bolt/Nut
Material
Bolt/Nut tightening torque N·m
Adapter flange material Carbon
steel/Stainless steel
Adapter flange material PVC
Carbon steel
20±1
7±0.5
SUS630 -
SUS304 10±0.5 7±0.5
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