Sahara -Pak HC-1260 Instruction Manual page 122

1. Reasonable precautions should be taken before beginning work on the valve. Protective clothing, as
required, should be worn.
2. WARNING: Before removing handle from the valve, or before removing seat retainer from a valve in
dead end service, close the valve and depressurize the line.
The eccentric design of the valve may allow line pressure to open the valve if the handle is not in
place while the valve is under pressure.
WARNING: Do not pressurize the line without a handle on the valve.
3. The valve must be in the closed position to be removed from the line.
4. Begin all work on a valve that has been removed from the line by cleaning the valve, removing any
grit or scale.
CAUTION: When handling the valve, care should be taken not to scratch the disc edge or seat.
5. Replacement seats, seals and other parts are available from Henderson Engineering Co., Inc.
Refer to the component drawing on page 2 of this cut sheet for parts identification.
1. If required, remove handle assembly. Remove socket head cap screws (21) and lock washers (22).
Remove mounting bracket (20).
NOTICE: Note assembly positions before removal.
2. Remove gland retainer nuts (14) and lock washers (13). Remove gland retainer (11) anti-blowout
retaining ring or split ring (10) (depending on size), and gland ring (7).
3. Hook out stem seals (8).
CAUTION: When handling stem seals, care should be taken not to scratch stem or stuffing box bore.
Do not remove thrust washer (9), unless further valve disassembly is required.
4. Examine stuffing box bore and stem, clean as necessary to remove any corrosion or foreign matter
before installing new seals.
5. Install new seals in stuffing box one at a time, TFE (white) seals first, with the carbon fiber ring at the
top. Stagger seal ring joints 180° apart when installing. Tamp each ring to bottom before installing
next ring.
NOTICE: On the larger valves, it will be necessary to compress each seal before adding the next.
6. Slide gland ring (7) over stem on top of seals (8). Install anti-blowout retaining ring or split ring (10)
(depending on valve size). Slide gland retainer (11) over stem and onto gland studs (12). Place
lockwashers (13) and hex nuts (14) on studs (12) and tighten finger tight. Tighten gland nuts (14)
evenly and alternately to the proper torque value given in Table 1 on page 4 of this cut sheet.
7. Remount mounting bracket (20) with lock washers (22) and cap screws (21) and handle assembly.
8. Operate valve open and closed several times to check for binding and to set the stem seals. Loosen
gland nuts (14) and retighten to torque value given in Table 1 on page 4 of this cut sheet.
CS030B – 730 – Butterfly Valve with Lever
Page 3 of 4
VALVE
MAINTENANCE
STEM SEAL REPLACEMENT
Rev 2
02/08/2013