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PILOT TYPE
OUTLET PRESSURE RANGES
PART NUMBER
COLOR CODE
SPRING WIRE DIAMETER
SPRING FREE LENGTH
psig
bar
In.
mm
In.
mm
6492L
2 to 6
5 to 15
13 to 25
0.14 to 0.41
0.34 to 1.0
0.90 to 1.7
1E395627022
1D7455T0012
1E395727192
Yellow
Green
Red
0.207
0.234
0.283
5.26
5.94
7.19
2.50
2.62
2.44
63.5
66.5
62.0
6492H
10 to 30
25 to 75
70 to 150
0.69 to 2.1
1.7 to 5.2
4.8 to 10.3
1E395627022
1D7455T0012
1E395727192
Yellow
Green
Red
0.207
0.234
0.283
5.26
5.94
7.19
2.50
2.62
2.44
63.5
66.5
62.0
6492HT
15 to 100
80 to 250
1.0 to 6.9
5.5 to 17.2
14B9943X012
14B9942X022
Unpainted
0.282
0.375
7.16
9.53
2.50
2.50
63.5
63.5
Table 2.
Outlet (Control) Pressure Ranges
CONSTRUCTION
MAXIMUM ALLOWABLE INLET PRESSURE
MAXIMUM
OPERATING OUTLET
PRESSURE
MAXIMUM EMERGENCY OUTLET PRESSURE
Cast Iron
Steel and
Stainless Steel
Cast Iron Main Valve and
Pilot Body
Steel or Stainless Steel
Main Valve and
Pilot Body
psig
bar
psig
bar
psig
bar
With Type 6492HT pilot
- - - -
300
20.7
250
17.2
- - - -
300 psig / 20.7 bar or main
valve body rating limit,
whichever is lower
With Type 6492H pilot
250
17.2
150
10.3
250 psig / 17.2 bar or main
valve body rating limit,
whichever is lower
300 psig / 20.7 bar or main
valve body rating limit,
whichever is lower
With Type 6492L pilot
25
1.7
100 psig / 6.9 bar
100 psig / 6.9 bar
Table 3.
Maximum Inlet and Outlet Pressures
TYPE
SPRING RANGE
SPRING COLOR
PART NUMBER
MINIMUM PRESSURE AT WHICH
MONITORING PILOT CAN BE SET
psig
bar
6492HM
10 to 30
0.69 to 2.1
Yellow
1E395627022
5 psig / 0.34 bar over normal distribution pressure
25 to 75
1.7 to 5.2
Green
1D7455T0012
10 psig / 0.69 bar over normal distribution pressure
70 to 150
4.8 to 10.3
Red
1E395727192
6492HTM
15 to 100
1.0 to 6.9
Unpainted
14B9943X012
80 to 250
5.5 to 17.2
14B9942X022
Table 4.
Safety Pilot Outlet (Control) Pressure Ranges
Description
The Type 92S pressure-reducing regulator for steam
service includes either a Type 6492H, 6492HT or
6492L pilot (Figure 1). Both pilots have a friction-
reducing bellows seal on the stem, and offer pressure-
setting adjustment plus sensitivity to downstream
pressure changes.
These pilots are available in either a standard version
with a drilled spring case vent or an optional version
with a tapped spring case vent and a sealed adjusting
screw for pressure-loading or on-off service. A 67 or
1301 Series regulator or 670 Series panel-mounted
regulator may be used to load the pilot of a version
for pressure-loading service, while a solenoid valve
may be used on the pilot of a version for on-off
service. A Type 6492HM or 6492HTM safety override
pilot is available for the Type 92S. The Type 6492H
or 6492HT pilot is used in a series installation with
the Type 6492HM or 6492HTM safety override
pilot installed on the upstream control valve. The
Type 6492HM or 6492HTM safety override pilot
senses pressure downstream of the second valve, and
prevents pressure from rising above safe operating
pressure in the event the downstream valve fails. This
system is approved by ASME B31.1-1989, 122.14.2.A,
and can replace an ASME safety valve when vent
piping is not practical and upstream steam pressure
does not exceed 400 psig / 27.6 bar. Local codes and
standards may require approval by an appropriate
authority prior to installation.
▲
WARNING
The Type 92S safety override system
does not provide positive shutoff in
dead end service. It is intended for
large distribution systems where steam
leakage will condense before steam
pressure builds up. Downstream piping
and components must be rated for
maximum upstream steam pressure for
dead end service. Failure to do so could
cause personal injury or death.
3
Type 92S