Australian Pipeline Valve - Installation, Operation and Maintenance Manual
23
LUBRICATED PLUG VALVES - SAPM/SAPL
A P P E N D I X C
Standard Design*
The standard style plug valve has the stem extended from the top
of the valve. The valves have a bolted cover which retains the
plug in case the gland is removed. The gland maintains the
pressure in the cover and prevents any leakage through the
stem as well as retaining the plug in position. The gland
supports the packing and acts as an anti-friction bearing to
prevent stem packing rotation. Plug lubrication grease is
injected through a nipple (fitted with a check valve). Greasing
can be done when the valve is under pressure. The plug
grooves avoid grease leakage into the line as during rotation
each groove is isolated from the other grooves.
2
Body
9/10
Gland Stud/ Nut
3**
Plug & Stem
10
Gland Nuts
4
Cover Bolts
11
Gland
5
Gasket
12
Stop Plate/ Lock Device
6
Packing Retainer Gasket
17*
Sealant Injector
7
Gland Packing (multiple)
21
Check Valve
8
Cover
* Combination button head fitting & plunger for packing sticks.
** Integral plug & stem inherently anti-static.
17*
10
11
7
9/10
4
8
6
5
2
21
3**
* Indicative sample SAPM B.O.M. only, refer to as-built drawing.
