STP-H803/H1303 Series Instruction Manual
Refer to the following Figure for the shape of R.D.S.B.
Installation
Bolt size
Type of flange
t
d
r
ISO_F flange
2.5 mm or more
M8
ICF flange
1 mm or more
5.9 mm or more
ISO_F flange
3 mm or more
M10
VG flange
1. 5 mm or more
7.5 mm or more
ISO_F flange
3. 5 mm or more
M12
VG flange
2 mm or more
9.1 mm or more
0.8 mm or more
Figure 4.6 Shape of Reduced Diameter Shank Bolts
◇
Be sure to confirm that the surface of the leveled and smoothed area
(expressed by "d" in the Figure 4.6) is free of crack, depression, and
other damages. Also, when you want to use commercially-available
screws, be sure to thoroughly grind them so as not to leave spiral
seams on their bottom.
2) When securing the inlet port flange with claw clamps
Refer to Table4.2 for rotational torque.
When securing the inlet port flange with only the claw clamp, the vacuum
equipment cannot withstand the maximum rotational torque generated
by the worst-case failure. To make the vacuum equipment withstand
abnormal torque, secure the base with all 8 screw-holes for legs or all 8
attached legs. Follow "CAUTION" on page 4-9 about legs and bolts for
securing the base.
For the claw clamp-type, use the required number of claw clamps as
specified in Table 4.3. Position the claw clamps evenly on the
circumference.
Table 4.3 Number of Claw Clamps by Size of Flange
Size of Flange
Number of Claw Clamps
ISO 160 or less
4 or more
ISO 200 to 250
6 or more
ISO 320 or more
8 or more
VG/ICF Flange
ISO_F Flange
Equipment
Pump Flange
Installation face
Equipment
Pump Flange
Space by cantering
t
d
r
t
d
r
4-11