Steam traps Inverted bucket
8
Dimensions/weights (approximate) in mm and kg
Screwed SW PN40 ANSI 150
ANSI 300
Withdrawal distance
Weight
Size
A
A1
A1
A1
B
C
D Screwed SW
PN40 ANSI 150
ANSI 300
DN15
½"
90
150 150 150
167
100
110
3.0
4.7
4.6
5.0
DN20 ¾"
90
150 150 150
167
100
110
3.0
5.3
5.0
5.8
DN25 1"
90
160 160 160
167
100
110
3.5
6.0
5.7
6.5
A
A1
Capacities (in accordance with ISO 7842)
700
300 400 500
D
B
D
200
100
5.6.25
60
C
0.5
1
10
20 3040
2 3 4 5
Pressure bar g
Safety information, installation and maintenance Before undertaking any maintenance on the inverted bucket steam trap it must be isolated from both supply line and return line and any pressure allowed to safely normalise to atmosphere. The trap should then be allowed to cool. It is recommended that new gaskets are used whenever maintenance is undertaken. The cover gasket contains a thin stainless steel support ring which may cause physical injury if it is not handled and disposed of carefully. Installation The trap must be installed with the body upright so that the bucket is rising and falling vertically. The inlet and outlet connections should be in a horizontal plane, with the trap installed below the drain point so that a water seal can be maintained around the open end of the bucket. How to fit valve and seat assembly Isolate the inverted bucket steam trap, remove body by undoing cover bolts. Remove complete bucket assembly by undoing the two screws. Remove valve seat. Screw in new valve seat to torque figures shown, using a little jointing paste on the threads and making sure that joint faces are clean. Fix new bucket assembly in position by using new screws which are supplied, centralise valve to the orifice and tighten screws to torque figures shown. Using new gaskets, refit body to torque figures shown.
8.6 22
How to order Example: 1 off Spirax Sarco DN20 SCA15 inverted bucket steam trap with steel body, and flanged to PN40.
TI-P077-05 CMGT Issue 6
Page 4 of 5
SCA Series Steel Inverted Bucket Steam Traps
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