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TYPE 92B PILOT (B)
TYPE 92B MAIN VALVE
TYPE 6492HM SAFETY
OVERRIDE PILOT (A)
E0794
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
LOADING PRESSURE
INTERMEDIATE PRESSURE
TYPE
6492HM
6492HTM
1. Inspect the Type 92B for any shipment damage.
Remove any foreign materials that may have collected
in the valve during shipment.
2. Blow down the pipeline as required.
3. Install a strainer ahead of the Type 92B to protect the
internal parts of the valve.
4. Install an upstream block valve ahead of the Type 92B
and a downstream block valve, if required, so that
the valve can be isolated and serviced. If continuous
operation is necessary during maintenance or
inspection, install bypass piping and valve around the
Type 92B.
Figure 3. Safety Override System Schematic
Table 4. Minimum Differential Pressures for Safety Override System
SPRING RANGE
psig
bar
10 to 30
0.69 to 2.1
25 to 75
1.7 to 5.17
70 to 150
4.8 to 10.3
15 to 100
1.0 to 6.9
80 to 250
5.5 to 17.2
TYPE 92B PILOT (C)
MINIMUM PRESSURE AT WHICH MONITORING
SPRING COLOR
Yellow
10 / 0.69 over normal downstream pressure
Green
10 / 0.69 over normal downstream pressure
Red
15 / 1.0 over normal downstream pressure
Unpainted
10 / 0.69 over normal downstream pressure
Unpainted
25 / 1.7 over normal downstream pressure
5. This Type 92B is intended to be installed with
the diaphragm case above the pipeline so that
condensate will not collect in the case.
6. Install the Type 92B in the pipeline so that the flow
will be in the direction indicated by the arrow cast
on the body. Follow normal piping procedures when
installing the screwed or flanged control valve.
7. Install the external control line as follows:
a. Connect one end of the control line to the
Type 92B body tapping. This tapping is
1/4 NPT for NPS 1 and 2 / DN 25 and 40
bodies, 3/8 NPT for NPS 2 / DN 50 body and
1/2 NPT for NPS 3 and 4 / DN 80 and
100 bodies.
Type 92B
TYPE 92B MAIN VALVE
PILOT CAN BE SET, psig / bar
5
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