DISASSEMBLY AND ASSEMBLY PROCEDURE
CAUTION
: Do not proceed with disassembly unless the valve has been relieved of all pressure, has
been allowed to reach ambient temperature, and has been drained of all liquids. To disassemble the
valve, close upper and lower valves, remove upper and lower pipe plugs, and allow valves to drain.
Remove hand wheel screw and hand wheel from stems, loosen and remove stem packing nut and
remove stem by turning counterclockwise. Once the stem has been removed, slip stem packing retainer
washer from stem. To replace glass packing, loosen both upper and lower glass packing nuts. Slide
tubular level gauge upward into the upper valve until the bottom of the tubular level gauge clears the
sight glass connection of the lower valve. While holding the tubular level gauge in this upward position,
rotate upper valve approximately 1/8 turn to allow clearance to remove tubular level gauge from upper
valve. Once tubular level gauge has been removed, remove glass packing nuts, glass packing, and glass
packing retainer washers.
To reassemble valves, clean all packing areas and glands. Install new stem packing into stem packing
nuts. Ensure that slits in packing are offset 180° from each other to ensure a proper seal. Slip stem
packing retainer washer and stem packing nut onto stem. Assemble hand wheel onto stem and secure
with screw. Thread stem assembly into valve by turning clockwise until stem seats and then back off
one turn. Assemble and tighten stem packing nut. Install new glass packing, glass packing retainer
washer, and glass packing nut onto valves. Once these steps have been followed, reinstall the tubular
level gauge into the gauge valve set as previously detailed.
RECOMMENDED SPARE PARTS
ITEM NO.:
DESCRIPTION:
PART NO.:
1------------------------- STEM PACKING (2 PER VALVE) ------------------------------------ 15179
2------------------------- STEM PACKING RETAINER WASHER (1 PER VALVE) ------- 15085
3------------------------- VALVE STEM (1 PER VALVE) --------------------------------------- 21764
4------------------------- GLASS PACKING FOR 5/8” GLASS (1 PER VALVE) ------------ 13208
OR
GLASS PACKING FOR 3/4” GLASS (1 PER VALVE) ------------ 13210
MAXIMUM PRESSURE:
500 PSIG AT 400°F USING TEFLON PACKING
(02-21-11)
