Instruction Manual
D103360X012
24000CVF/SVF Valves
June 2017
5
2. Loosen the packing spring load by removing the packing follower (key 10).
Remove the plug and stem assembly by pulling it out through the bottom of the bonnet (key 8) while rotating the
stem (key 5). This will help prevent damage to the packing components.
Note
Handle the parts carefully to avoid damaging the seating and guiding surfaces. Wipe the parts with a clean soft cloth and examine
for signs of wear or damage.
3. To remove the seat ring (key 2), fabricate a special wrench to engage the lugs on the ring. Clean the seat ring
thoroughly and examine for signs of wear or damage.
4. Low Flow Trims:
a. For Baumann 151 trim (figure 4) unscrew the seat subassembly (key 51) from the seat ring (key 2) with a 5/8
inch socket wrench. When reassembling, hand tighten the subassembly
(key 51) and then rotate 1/8 of a turn with the 5/8 inch socket to lock in place.
Note
If changing to Baumann 151 trim, for correct flow characteristics, be sure the valve is reversed in the pipeline so that flow direction
is flow down.
b. For Baumann 177 trim (figure 5) unscrew the retainer nut (key 24) using a 3/4 inch socket wrench. Remove the
gland (key 23) and insert (key 25). Replace the insert (key 25), making sure that the tapered portion faces up. If
replacement of the housing (key 26) is required, use a 5/8 inch socket wrench.
5. NOLEEK Bellows Trim: Refer to figure 6 and table 7. Hold the bellows bonnet and push down on the stem to expose
the plug retaining pin (key 21). Using a small punch, tap pin (key 21) out. To replace the new plug retaining pin (key
21), be sure the plug and stem are aligned to expose the hole (figure 6). With a needle nose pliers, slide the pin (key
21) into the hole.
WARNING
Be sure the plug retaining pin (key 21) is flush inside the hole and not exposed on either side of the plug or damage could
happen to the bonnet interior.
Lapping the Valve Seat
If valve seat leakage becomes excessive, it may be necessary to lap the valve seat.
Lapping is the process of mating the valve plug to the seat ring, with an abrasive to produce a close fit. When valve seat
leakage becomes excessive, lapping becomes necessary. The plug and seat ring seating surfaces should be free of
large scratches or dents and the contact surface of the seats should be as narrow as possible.
1. Disassemble the valve body and remove the plug and stem assembly (keys 4 and 5) as directed in the previous Valve
Body Disassembly section in this instruction manual.
To Next Page
Loading...
Need help?
General