Operating instructions
IM-P623-04 ST Issue 5
9
5. Operation
The Spirax Sarco HP80, HP100, HP150 and HP210 are bimetallic steam traps.
These traps operate on the basis of two opposing forces acting on the valve - an opening
force created by the valve opening spring, and a closing force resulting from the condensate
temperature acting on the bimetallic elements.
They operate with no loss of steam and automatically and quickly drains air, non-condensable
gases and large quantities of cold water on start-up.
4. Commissioning
After installation or maintenance ensure that the system is fully functioning. Carry out tests on
any alarms or protective devices.
Note: During commissioning the valve may need resetting to take account of any
backpressure in the return line.
Important note:
Before actioning any maintenance programme observe the
'Safety information' in Section 1.
Safety note:
These traps are installed in high pressure steam lines. Personnel doing the adjustment
work should wear heavy gloves, long sleeve shirt, and other safety equipment designed
to protect the wearer (goggles, face shield, etc.) in the event of a leak.
The equipment needed to proceed with any maintenance programme is listed in Table 1.
The HP80, HP100, HP150 and HP210 have an external adjustment screw, which permits the
flushing of the trap seat and the setting of the discharge temperature of the condensate
in the inlet line allowing optimum performance to be achieved.
Table 1 Spanners to be used and recommended tightening torques
Item Part
or
N m (lbf ft)
mm
3 Bimetallic element - pipe spanner 36 A / F 120 (88)
6 Locking gland nut on adjustment screw 21 A / F 25 (18)
HP80 24 A / F 120 (88)
9 Cover nut HP100 24 A / F 160 (118)
HP150 and HP210 30 A/F 200 (148)
11 Blind nut
HP80 and HP100 41 A/ F 80 (59)
HP150 and HP210 55 A / F 140 (103)
6. Maintenance