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B Series
Repair
1. Wait until trap is cool to the touch.
2. Remove cover - remove and discard old gasket.
3. Remove valve seat from body.
4. Examine bellows by:
a. Comparison to new bellows.
b. Immersing in cold and hot water to test
bellows travel.
5. If bellows are not damaged, reassemble into
cover; if damaged, replace. Leave threads of
bellows dry, tighten into trap cover and be sure to
not over torque.
6. Examine valve and valve seat
a. Clean with 80 to 150 grit emory. If no wear is
present, the valve and seat can be reused; if
damaged, replace. Use small amount of anti-
seize compound on seat and valve threads.
Valve and seat should be torqued for snug fit.
7. Insert new gasket.
8. Reassemble cover using small amount of anti-
seize compound on cover threads if trap has
screwed cover. If cover is bolted, use anti-seize
compound on the bolts.
9. Seating of cover gasket may be checked by
installing a pipe plug in outlet of trap and applying
80 psig / 5.52 barg air to inlet. Use soapy water
or leak detection fluid. A slight seepage should
be acceptable since air can pass through a small
opening that steam will not.
10. If possible, test trap before returning it to service.
Any pressure within trap range can be used; a
simple drip leg will suffice. Valve in trap should
close on steam. Leave trap on line long enough for
trap to cycle once.
6
Parts Ordering
When corresponding with your local Sales Office about
B Series, always reference the assembly number.
Parts List
Key
Description
Spare Parts Kit
1
Hex Bolts, Steel
1 and 1-1/4 NPT
3/4 NPT
1/2 NPT
2
Cover Flange, Cast Iron
3/4 NPT
1/2 NPT
1-1/2 and 2 NPT
1 and 1-1/4 NPT
3
Gasket, Graphite
1/2 NPT
3/4 NPT
1 and 1-1/4 NPT
1-1/2 and 2 NPT
4
Bellows, Stainless Steel
1/2 NPT
3/4, 1, 1-1/4, 1-1/2 and 2 NPT
5
Seat, Stainless Steel
1-1/2 and 2 NPT
1 and 1-1/4 NPT
1/2 NPT
3/4 NPT
6
Seat Gasket
1/2 NPT
1-1/2 and 2 NPT
1 and 1-1/4 NPT
3/4 NPT
7
Body, Cast Iron
1-1/2 NPT
1-1/2 NPT HC
2 NPT
2 NPT HC
1/2 NPT
1-1/4 NPT
1 NPT
3/4 NPT
Part Number
See Table 2
WAL0046426
WAL0046425
WAL0046424
WAL421146
WAL421145
WAL421148
WAL421147
WAL621161
WAL621162
WAL621163
WAL621164
WAL0015493
WAL0015498
WAL421193
WAL421191
WAL421187
WAL421189
WAL0055100
WAL0055104
WAL0055102
WAL0055101
WAL421127
WAL421221
WAL421128
WAL21222
WAL421123
WAL421126
WAL421125
WAL421124
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