Fig. 3
Closed
Adjustment Bolt
Open
Adjustment Bolt
page 7
INSTALLATION:
( cont. )
INSTALLATION:
- Liquids without Suspended Solids and Clean Gases
For liquids without suspended solids and clean gas application, the plug valve can be installed for both horizontal and
vertical pipe orientations.
LIQUIDS AND GASES:
1. Before installation, remove foreign material such as weld spatter, oil, grease, and dirt from the valve and pipeline.
2. Install the valve as shown in Figure 1.
3. Ensure the valve and flanges are concentric to effect proper flange sealing.
4. Tighten the flange bolts or studs in a sequence according to Figure 2.
SUSPENDED SOLIDS:
1. Before installation, remove foreign material such as weld spatter, oil, grease, and dirt from the valve and pipeline.
2. Install the valve as shown in Figure 1.
A. In horizontal pipelines install valve so plug is horizontal and rotates upward as valve opens.
B. For vertical pipelines, install valve with the end marked “Seat” at top of valve.
3. Tighten the flange bolts or studs in a sequence according to Figure 2.
4. Ensure the valve and flanges are concentric to effect proper flange sealing.
DIRECT NUT OPERATED VALVES:
S764 valves up to DN200/8” are able to operate with a top-mounted 2” square nut for ¼ turn operation and is
mounted directly to the valve plug. To open the valve, rotate the nut 90 degrees in the counter-clockwise direction and to
close the valve, rotate the nut 90 degrees in the clockwise direction. The closed/open position is adjusted by using two
screws as shown in Figure 3.
