Spirax Sarco STS17.2 - Page 13

IM-P128-23 ST Issue 6
13
Table 1 Recommended tightening torques
Item
or
mm
Torque
N m lbf ft
19 32 A /F M28 x ISP 170 - 190 126 - 140
20 Adaptor 32 A /F M28 x ISP 170 - 190 126 - 140
23 19 A/ F 50 - 55 37 - 40
24 24 A/ F 50 - 55 37 - 40
25 24 A/ F
Not applicable Not applicable
26 17 A /F 22 - 25 16 - 18
STS17. 2 version
with double upstream isolation
21
22
Fig. 4
23
BDV1
blowdown
valve
SSL1
integral
sensor
WLSL1
integral sensor
19
Standard
20
Adaptor
20
Adaptor
20
Adaptor
25
26
24
Lockset screw
Please note that the optional
Spiratec SSL1 and WLSL1
sensors (items 20 + 23 or 24)
must not be fitted when the
STS17.2 is installed in a
vertical application. However
a sensor can be fitted to a
UTD30 steam trap if fitted.
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