|
GATE VALVES
|
STANDARD MATERIAL SPECIFICATIONS |
|
[VALVE
DIMENSIONS] |
[STANDARD
MATERIALS]
SERVICE RECOMMENDATION
- The gate valve is normally used
for on-off service. It is not recommended for throttling.
- The gate valve is normally
installed to pipe horizontally and the valve stem stands
vertically. It can also be mounted to the vertical direction with
the stem facing to the opposite or other directions except the
vertical, provided that a special construction is prepared
depending on the valve size, service conditions, or materials. In
case of valve purchase for a special purpose other than the normal
installation, the orientation of valve should be specified.
- After the gate valve is closed
completely with a sufficient force enough to shut off, the stem
should be backed slightly about 1/8 to 1/4 turn to relieve the
load on stem. This will cause the stem to expand a little without
valve bending or damage, not affecting the valve shutoff.
|
|
|
[VALVE
DIMENSIONS] |
[STANDARD
MATERIALS]
| BILL OF
MATERIALS |
|
NO |
PART NAME |
MATERIAL |
|
| 1 |
BODY |
|
A216 WCB |
|
| 2 |
BONNET |
|
A216 WCB |
|
| 3 |
WEDGE |
|
A217 CA15 |
*1 |
| 4 |
STEM |
|
A479-410 |
|
| 5 |
HAND WHEEL |
A197 |
|
| 6 |
BODY SEAT RING |
A576-1020 |
*1 |
| 7 |
BELOWS SET |
BELLOWS |
STAINLESS STEEL TYPE 321 |
|
|
7/1 |
- |
UPPER HOLDER |
A479-304 |
|
|
7/2 |
- |
LOW
HOLDER |
A479-304 |
|
| 8 |
GASKET |
|
Spiral wound type(Graphite + inner ring) |
*2 |
| 9 |
PACKING |
|
Pure graphite + lattice braided, carbon fiber packing,
impregnated with special lubricant |
*2 |
| 10 |
GLAND FLANGE |
A105 |
|
| 11 |
HINGE BOLT |
A307B |
|
| 12 |
NUT |
|
A307B |
|
| 13 |
HINGE PIN |
A576-1020 |
|
| 14 |
PACKING GLAND |
A576-1020 + Cr |
PLATING |
| 15 |
BONNET BOLT |
A193-B7 |
|
| 16 |
NUT |
|
A194-2H |
|
| 17 |
YOKE CAP |
A576-1020 |
|
| 18 |
YOKE SLEEVE |
A439-D2 |
|
| 19 |
HAND WHEEL NUT |
A47-32510 |
|
| 20 |
SET SCREW |
STEEL |
|
| 21 |
NIPPLE |
|
STEEL + Cr |
|
| 22 |
YOKE |
|
A216 WCB |
|
| 23 |
EXTENSION PIPE |
A106-A |
|
|
|
|
| |
|
