Data Sheet

Bulletin 71.2:92S
2
Specications
Main Valve Body Sizes and End Connection Styles
BODY SIZES
END CONNECTION STYLES AND RATINGS
Cast Iron Body
Steel or
Stainless Steel Body
1, 1-1/2, and 2 NPT NPT or PN 16/25/40
NPS 1, 1-1/2, 2, 2-1/2, 3,
and 4 / DN 25, 40, 50, 65,
80, and 100
CL125 FF or
CL250 RF
CL150 RF, CL300 RF,
CL600 RF, or
PN 16/25/40
NPS 6 x 4 /
DN 150 x 100
(2)
Not available
CL300 RF,
CL600 RF, or
PN 16/25-40/64/100
Maximum Inlet and Pilot Supply Pressure
(1)
Cast Iron Main Valve and Pilot: 250 psig /
17.2 bar or body rating limit, whichever is lower
Steel Main Valve and Pilot: 300 psig / 20.7 bar
or body rating limit, whichever is lower
Minimum and Maximum Differential Pressures
(1)
BODY SIZES,
NPS / DN
MINIMUM
DIFFERENTIAL
PRESSURE
MAXIMUM
DIFFERENTIAL
PRESSURE
1, 1-1/2, and 2 /
25, 40, and 50
15 psi / 1.0 bar
200 psi / 13.8 bar or
body rating limit,
whichever is lower
2-1/2, 3, 4, and 6 x 4 /
65, 80,100, and
150 x 100
(2)
20 psi / 1.4 bar
175 psi / 12.1 bar or
body rating limit,
whichever is lower
Outlet (Control) Pressure Ranges
See Table 1
Maximum Outlet Pressures
(1)
See Table 2
Maximum Allowable Loading Pressure for Pilot
with Tapped Spring Case
Combination of pilot control spring setting and spring
case loading pressure cannot exceed 150 psig /
10.3 bar for Type 6492H pilot or 25 psig / 1.7 bar
for Type 6492L pilot and 250 psig / 17.2 bar for
Type 6492HT
Droop
See Table 5 and Figure 8
Typical Regulating Capacities
See Table 5 and Capacity Information section
Main Valve Orice Sizes and Flow Coefcients
See Table 3
Noise Information
See Table 6 and Noise Abatement Information section
Construction Materials
Main Valve
Body and Body Flange: Cast iron (NPS 1 through 4 /
DN 25 through 100 sizes only), steel or CF8M
Stainless steel (all sizes)
Valve Plug: Heat-treated 17-4PH stainless steel
Cage: Cast iron or Stainless steel
Spiral Wound Gasket: 316L stainless steel
and graphite
Spring, Lower Stem, Retaining Ring, Bolting, and
Cylinder Spacer: Steel or plated steel
Body and Cylinder Gaskets: Copper
Pistons, Seat Ring, and Cylinders: Heat-treated
416 Stainless steel
Piston Ring(s): Polytetrauoroethylene (PTFE)
Piston Ring Retainer(s): 302 Stainless steel
Noise Attenuation Trim (If Used):
Stainless steel
Stem Seal: PTFE/glass
Pilot
Body and Spring Case: Cast iron, Steel, and
Stainless steel
Seat Ring and Stem: Heat-treated
416 Stainless steel
Bellows and Bellows Retainer: Brass
Plug, Plug Guide, Plug Spring, Diaphragms, Bleed
Restriction, and Inlet Screen: Stainless steel
Diaphragm Gasket: Encapsulated ber asbestos
Control Spring, Upper Spring Seat, Adjusting
Screw, Bolting, Pipe Plug, Reducing Bushing,
and (If Used) Diaphragm Plate: Steel
Fittings: Brass
Tubing: Copper
Pipe Nipple: Steel
1. The pressure/temperature limits in this Bulletin and any applicable standard or code limitations, must not be exceeded.
2. The two-number designation indicates line size by trim size.
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