3" Model 441-S
Illustration Part
Number
Description
Number
26
Hex Cap Screw, 1/4"–20 x 1/2" Lg.,
910001
120,000 tensile
27
O-Ring, for Orifices
950818
2-1/8" Inlet Orifice, plated steel
090-20-028-00
2-1/8" Inlet Orifice, stainless steel
090-20-028-50
28
1-3/4" Inlet Orifice, plated steel
090-20-028-02
1-3/4" Inlet Orifice, stainless steel
090-20-028-52
1-1/2" Inlet Orifice, plated steel
090-20-028-03
1-1/2" Inlet Orifice, stainless steel
090-20-028-53
2-1/8" Outlet Orifice, plated steel
090-20-029-00
2-1/8" Outlet Orifice, stainless steel
090-20-029-50
29
1-3/4" Outlet Orifice, plated steel
090-20-029-02
1-3/4" Outlet Orifice, stainless steel
090-20-029-52
1-1/2" Outlet Orifice, plated steel
090-20-029-03
1-1/2" Outlet Orifice, stainless steel
090-20-029-53
Valve Assembly, 2-1/8", brass trim,
090-20-515-30
Buna-N (Black, 50-55 Duro)
Valve Assembly, 2-1/8", stainless
steel trim, Buna-N
090-20-515-50
(Black, 50-55 Duro)
50
Valve Assembly, 2-1/8", brass trim,
090-20-515-40
Polyurethane (Red, 65-75 Duro)
Valve Assembly, 2-1/8", stainless
steel trim, Polyurethane
090-20-515-60
(Red 65-75 Duro)
Valve Retainer, standard, stainless
090-20-018-30
50b
steel, 2-1/8"
Valve Retainer, v-port wings,
090-20-012-51
stainless steel, 2-1/8"
Molded Valve, 2-1/8", Buna-N
090-20-315-00
50d
(Black, 50-55 Duro) all trim
Molded Valve, 2-1/8", Polyurethane
090-20-315-02
(Red, 65-75 Duro) all trim
All Models 441-S
Illustration Part
Number
Description
Number
1a
Tetraseal (or O-Ring) 1-3/4 x 2"
904092
4
Hex Cap Screw, 5/16" – 18 x 3/4"
910028
6
Spring Cage Cover Gasket
090-16-066-30
7
Vent Cap, 1/4" NPT
137-02-505-02
9
Spring Cage Gasket
090-16-066-60
13
Thrust Bearing, 3/8" diameter
930510
stainless steel ball
16
Hex Steel Nut, 5/8" – 18
905993
18
Seal Gasket, 2 used
014-76-179-03
7" Diaphragm
090-78-150-21
10" Diaphragm
090-70-150-20
12" Diaphragm
090-71-150-20
20
14" Diaphragm
090-72-150-20
16" Diaphragm
090-73-150-20
18" Diaphragm
090-74-150-20
20" Diaphragm
090-75-150-20
23
O-Ring, 11/16" I.D. 7/8" O.D.
934013
24
Diaphragm Connecting Stem,
090-16-058-00
stainless steel
41
Hex Steel Nut, 3/8" – 16
920853
42
Hex Cap Screw, 3/8" – 16 x 1-3/8" Lg. 903568
45
Travel Indicator Assembly
5
Installation and Maintenance Instructions
Model 441- Regulator
2" Model 441-S
Illustration Part
Number
Description
Number
26
Hex Cap Screw, 1-4"–20 x 1/2" Lg.,
910001
120,000 tensile
27
O-Ring, for Orifices
904832
1-3/4" Inlet Orifice, plated steel
090-16-028-00
28
1-3/4" Inlet Orifice, stainless steel
090-16-028-50
1-1/2" Inlet Orifice, plated steel
090-16-028-01
1-1/2" Inlet Orifice, stainless steel
090-16-028-51
1-3/4" Outlet Orifice, plated steel
090-16-029-00
29
1-3/4" Outlet Orifice, stainless steel
090-16-029-50
1-1/2" Outlet Orifice, plated steel
090-16-029-01
1-1/2" Outlet Orifice, stainless steel
090-16-029-51
Monitoring
The Model 441-S Regulator makes an excellent monitor. It can act
as a standby regulator installed in series, which assumes control if
a failure in the operating regulator permits the outlet pressure to
exceed the set-point. It can be located in either the upstream
or the downstream position.
When a Model 441-S Regulator is used to monitor a regulator with
an identical inner valve (another 441 Regulator), the total maximum
capacity through both regulators can be figured at 70% of the
capacity of one regulator alone. This applies with the monitor
located either up or downstream.
For use with gases not listed above, please contact your Sensus
Metering Systems representative or distributor for recommendations.
0.60
Specific gravity of the gas
Correction Factor =
Type of Gas
Correction Factor
Air (specific gravity 1.0)
0.77
Propane (specific gravity 1.53)
0.63
1350 BTU Propane-Air Mixture
(specific gravity 1.20)
0.71
Nitrogen (specific gravity 0.97)
0.79
Dry CO
2
(specific gravity 1.52)
0.63
For other non corrosive gasses use the following formula:
