Introduction
This installation guide provides instructions for installation,
startup, and adjustment. To receive a copy of the instruction
manual, contact your local Sales Office or view a copy at
www.fisher.com. For further information refer to: Type 92S
Instruction Manual, form 5234, D100637X012.
P.E.D. Categories
This product may be used as a safety accessory with
pressure equipment in the following Pressure Equipment
Directive categories. It may also be used out-side of the
Pressure Equipment Directive using sound engineering
practice (SEP) per table below. For information on the
current PED revision see Bulletin:
D103053X012
.
PRODUCT SIZE
CATEGORIES
FLUID TYPE
DN 25 / 1 in.
SEP
1
DN 40, 50, 65, 80, 100 and 150 x 100 /
1-1/2, 2, 2-1/2, 3, 4 and 6 x 4 in.
II
Specifications
Main Valve Body Sizes and End Connection Styles
(1)
BODY SIZE
END CONNECTION STYLE AND RATING
DN
In.
Cast Iron Body
Steel or
Stainless Steel Body
25, 40 and 50 1, 1-1/2 and 2
NPT
NPT
25, 40, 50, 65,
80 and 100
1, 1-1/2, 2,
2-1/2, 3 and 4
CL125 FF or
CL250 RF
CL150 RF, CL300 RF,
CL600 RF or
PN 10/25/40
150 x 100
(1)
6 x 4
(1)
Not Available
CL300 RF, CL600 RF or
PN16/25/40/64/100
Maximum Inlet and Pilot Supply Pressure
(1)
Cast Iron Main Valve and Pilot:
17.2 bar / 250 psig or
body rating limit, whichever is lower
Steel or Stainless Steel Main Valve and Pilot:
20.7 bar /
300 psig or body rating limit, whichever is lower
Minimum and Maximum Differential Pressures
(1)
BODY SIZE
MINIMUM
DIFFERENTIAL
PRESSURE
MAXIMUM
DIFFERENTIAL PRESSURE
DN
In.
bar
psi
bar
psi
25, 40, 50
1, 1-1/2, 2
1.0
15
13.8 bar or
body rating
limit,
whichever is
lower
200 psi or
body rating
limit,
whichever is
lower
65, 80, 100,
150 X 200
(1)
2-1/2, 3, 4,
6 X 4
(1)
1.4
20
12.1 bar or
body
rating limit,
whichever is
lower
175 psi or body
rating limit,
whichever is
lower
Maximum Inlet and Outlet Pressures
(2)
See Table 1
Proof Test Pressure
All Pressure Retaining Components have been proof
tested per Pressure Equipment Directive.
Outlet (Control) Pressure Ranges
(2)
PILOT TYPE
OUTLET PRESSURE RANGES
bar
psig
6492L
0.14 to 0.41
0.34 to 1.0
0.90 to 1.7
2 to 6
5 to 15
13 to 25
6492H
0.69 to 2.1
1.7 to 5.2
4.8 to 10.3
10 to 30
25 to 75
70 to 150
6492HT
1.0 to 6.9
5.5 to 17.2
15 to 100
80 to 250
Maximum Allowable Loading Pressure for Pilot with
Tapped Spring Case
(2)
Combination of pilot control spring setting and spring case
loading pressure must not exceed 10.3 bar / 150 psig for
Type 6492H pilot or 1.7 bar / 25 psig for Type 6492L pilot
and 17.2 bar / 250 psig for Type 6492HT.
Maximum Material Temperature Capabilities
(2)
Cast Iron Construction:
208°C / 406°F
Steel Construction:
260°C / 500°F
High Temperature Optional Steel and Stainless steel
Construction:
343°C / 650°F
PILOT TYPE
MAXIMUM ALLOWABLE INLET PRESSURE
MAXIMUM OPERATING
OUTLET PRESSURE
MAXIMUM EMERGENCY OUTLET PRESSURE
Cast Iron
Steel or
Stainless Steel
Cast Iron Main Valve
and Pilot Body
Stainless Steel or Steel Main
Valve and Pilot Body
bar
psig
bar
psig
bar
psig
bar
psig
bar
psig
6492L
17.2
250
20.7
300
1.7
25
6.90
100
6.90
100
6492H
17.2
250
20.7
300
10.3
150
17.2 bar or main
valve body rating
limit, whichever
is lower
250 psig or main
valve body rating
limit, whichever
is lower
20.7 bar or main
valve body rating
limit, whichever
is lower
300 psig or main
valve body rating
limit, whichever
is lower
6492HT
- - - -
20.7
300
17.2
250
- - - -
20.7 bar or main
valve body rating
limit, whichever
is lower
300 psig or main
valve body rating
limit, whichever
is lower
Table 1.
Maximum Inlet and Outlet Pressures
(1)
1. The two-number designation indicates end connection size by trim size.
2. The pressure/temperature limits in this installation guide and any applicable standard or code limitation should not be exceeded.
Type 92S
Installation Guide
D100637X014
English – October 2013
