Sensus 441-s User manual

RM-1350 R7

Sensus Metering Systems

Installation

and

Maintenance

Instructions

Model 441-S Regulator

THE GAS INDUSTRY

Installation and Maintenance Instructions

Model 441-S Regulator

Maximum

Working Maximum

Regulator 441 Body Pressure Inlet

Body Type Materials of Body Pressure

Cast Iron

Screwed End (ASTM A126-71 250 psi

(2" Pipe Size Only) Class B)

Cast Iron

Flanged (ASTM A126-71 175 psi

ANSI 125 FF Class B) 100 psi

Ductile Iron

Flanged (ASTM A395-71 575 psi

ANSI 250 RF gr 60-40-18)

Cast Steel

Flanged (ASTM A126-70a 720 psi

ANSI 300 RF gr WCB)

Installation and Start-Up

1Thoroughly purge inlet piping to remove dirt and debris which

could damage the regulator or impair its operation. If this

cannot be done, a filter or strainer should be installed ahead

of the regulator.

Make certain that regulator is free of any dirt or foreign matter

that might have collected.

2Place regulator in the line with high pressure connected to the

inlet side (be sure that shipping screens or covers, if used,

are removed from the inlet and outlet).

Tighten bolts on flanges evenly.

Where required, the regulator may be inverted.

CAUTION

It is the user's responsibility to assure that all regulator vents

and/or vent lines exhaust to a non-hazardous location away from

ANY POTENTIAL sources of ignition. Where vent lines are used,

it is the user's responsibility to assure that each regulator is

individually vented and that common vent lines ARE NOT used.

3From the 1/2" union 60 extend pipe or tubing to the control

connection into the outlet piping. This control piping should

not be less than 1/2" in size and should be adequately

protected against breakage (regulators go wide open if the

control line is broken).

The regulator will work to deliver the pressure, for which it is

adjusted, at that point in the outlet piping where the control

connection is located.

In general, the control connection should be at least 8 pipe

diameters from the regulator and should be in as straight a

run of pipe as possible.

The control connection should be clean and smooth,

free of rough edges, welding “icicles”. etc.

4Where outlet piping increases in size near the regulator,

it is generally preferable to locate the control connection in

the larger size.

The 1/2" union 60 contains a small orifice, approximately

1/16" diameter. This orifice should not be removed. Also,

make certain this orifice is open and free of foreign material.

Check all connections for leaks.

CAUTION

Turn gas on very slowly. If an outlet stop valve is used,

it should be opened first. Do not overload the diaphragm with a

sudden surge of inlet pressure. Monitor the outlet pressure

during start-up to prevent an outlet pressure overload.

5Put the regulator into operation as follows: (refer to page 8)

a. Slowly open the downstream control line valve (A).

b. Slowly open the downstream block valve (B).

c. Very slowly open the upstream block valve (C).

d. Set the adjusting screw 10 for the required outlet pressure.

Turn it clockwise to increase the pressure counterclockwise

to decrease it. Only make this adjustment when gas

is actually flowing through the regulator.

e. After adjustment is complete, the locknut 11 should be

tightened firmly and the seal cap 1replaced.

6To shut down, carefully close valves C, B, and Ain that order.

CAUTION

The diaphragm case vent must be positioned to protect against

flooding, drain water, ice formation, traffic, tampering, etc. The

vent must be protected against nest building animals, bees,

insects, etc. to prevent vent blockage and minimize the chances

for foreign material from collecting in the vent side of the

regulator diaphragm.

7The vent connection is an escape path for flammable gas

and it must be located and/or piped so that potential

discharge occurs in a safe area away from buildings,

open flames, collection areas, arcing devices, etc.

Regulators that are installed indoors or in a non-vented

area must be vented to the outside. Simply run vent piping

from the regulator vent connection to a non-hazardous

location on the outside away from ANY POTENTIAL sources

of ignition. The vent piping must be connection size

or larger and piped to a safe area. The vent discharge

must be protected against the potentials outlined

in instructions #2 and #10.

8For outdoor installations, it is recommended that the

regulator be installed so that the regulator vent faces

downward to avoid the potential for water or other foreign

matter entering the regulator and interfering with the

proper operation of the regulator.

Maximum Inlet Pressures

Installation and Maintenance Instructions

Model 441-S Regulator

Servicing and Adjustment

General Notes

1Make sure the regulator is entirely depressured before servicing.

2A quick visual inspection of the valve can be made by

removing inspection plates 38 from the sides of the body.

They also provide greatly improved access to the valve

when servicing or adjusting.

3The valve and body parts are interchangeable with other

441 Regulators (441-57S, 441-X57, 441-VPC,

441-2100, etc.).

4Use lubricants sparingly and with care to avoid exposing

tacky surfaces to the gas stream. Such surfaces could

cause accumulation of dirt on close clearance parts.

Use moly or silicone-type lubricants. Avoid the use of

petroleum base types.

Lubricate stem 24, guide 50h, and stem O-ring 23 with dry

silicone lubricant to help assure free movement and a tight

seal.

An application of lubricant to the other O-rings and the

tetraseals in the regulator will help assure their tightness.

To Remove Valves

1Remove seal cap 1, back off adjusting screw 10, remove

housing cover 5, and spring 14.

2Remove bottom plate 33, and side plates 38.

3Insert an Allen wrench through side inspection opening and

loosen Allen screw 50h.

4Unscrew lower valve assembly and remove through bottom

opening (50h unscrews from 24).

5Unscrew upper valve assembly and remove through side

opening (50e or 50j unscrews from 24).

Note:

a. If upper valve assembly is too large to remove through side

opening, then remove it through bottom opening by also

removing outlet orifice 29, (remove cap screws 26 to

remove orifice, and, if tight, jack out using cap screws

in jacking holes).

b. Entire valve assembly may be removed intact through

bottom opening by also removing orifice 29. This method

leaves the lock-up adjustment undisturbed.

c. Use care with orifice gasket 27.

6To disassemble upper and/or lower valve assembly, remove

nuts 50a.

To Replace and Adjust Valves

1Assemble upper valve assembly (parts 50a, 50b, 50c, 50d,

50e, 50f, 50g, 50j), and lower valve assembly (parts 50a,

50b, 50c, 50d, 50h). Firmly tighten nuts 50a. (Also, 50i

should be firmly tightened against 50a).

2Insert upper valve assembly and screw into place by a few

turns (50e or 50i screws into 24 but should be loose by

1/2 to 1 turn).

3If orifice 29 was removed, reinstall it.

4Inset lower valve assembly and screw into place by a few

turns (50h screws into 50e).

5Turn upper valve assembly so Allen screw 50g is accessible

through side inspection opening.

6Make the valve lock-up adjustment as follows:

a. Hold upper valve against its seat. This can be done by

hand, reaching through side inspection opening.

b. While holding the upper valve against its seat, screw

lower valve assembly upwards until the lower valve also

touches its seat. When both upper and lower valves are

touching their seats they are correctly adjusted for tight

lock-up.

c. Firmly tighten Allen screw 50g. This locks the adjustment

by evenly and tightly locking 50h and 50e together.

Note: If the entire valve assembly was removed intact and

Allen screw 50g has not been loosened, the assembly may

be reinstalled without making the lock-up adjustment.

7Screw entire valve assembly up (50e or 50i screws into 24)

until it bottoms. Then back off 1/2 to 1 full turn - this is

important.

8Replace side plates 38.

9Replace bottom plate 33. Match bottom end of 50h into 31

and/or 32 and then turn bottom plate either way

to first matching bolt hole position.

To Remove Orifices

1Remove outlet orifice 29 per applicable steps 1 through 5

under section “To Remove Valves”.

2Remove inlet orifice 28 as follows:

a. Remove seal cap 1, back off adjusting screw 10, remove

housing cover 5and spring 14.

b. Remove bottom plate 33 and then unscrew valve assembly

by grasping 50h and turning (50e or 50i unscrews from

24).

c. Remove diaphragm case assembly by first opening union

60 and removing cap screws 34.

d. Remove cap screws 26 and remove inlet orifice 28.

If orifice is tight, jack out cap screws in jacking holes.

Use care with gasket 27.

e. When replacing diaphragm assembly, the threaded

connection between 24 and 50e or 50i should be

screwed together until it bottoms and

then backed off 1/2 to 1 turn - this is important

CAUTION

Regulators are pressure control devices with numerous moving

parts subject to wear that is dependent upon particular

operating conditions. To assure continuous satisfactory

operation, a periodic inspection schedule must be adhered to

with the frequency of inspection determined by the severity of

service and applicable laws and regulations.

failure of the regulator to lock-up. The allowable over

pressurization is the lowest of the maximum pressures permitted

by federal codes, state codes, Bulletin RDS-1498, or other

applicable standards. The method of providing over pressure

protection could be a relief valve, a monitor regulator, a shut off

device or any similar device.

Temperature Limits

The Model 441-S Regulator can be used for flowing temperatures

from -20°F to 150°F.

Buried Service

The Model 441-S Regulator is not recommended for buried service.

Condensed Parts List

For complete parts list and list prices please refer to RP 1350.

When ordering parts for a 441-S regulator, include pipe size,

model number, inner valve size, and serial number if possible.

Maximum Emergency Pressure

The maximum pressure the Model 441-S regulator inlet may be

subjected to under abnormal conditions without causing damage

to the regulator is 125 psi.

The Maximum pressure the regulator outlet may be subjected to

without causing damage to the internal part of the regulator is:

10" Diaphragm set-point + 4 psi

12" Diaphragm set-point + 3 psi

14" Diaphragm set-point + 2 psi

16" Diaphragm set-point + 1 psi

18" Diaphragm set-point + 1 psi

20" Diaphragm set-point + 1 psi

The set-point is defined as the outlet pressure a regulator is

adjusted to deliver.

If any of the above pressure limits are exceeded, the regulator

must be taken out of service and inspected. Damaged or

otherwise unsatisfactory parts must be repaired or replaced.

The maximum pressure that can be safely contained by the

diaphragm case is:

10" Diaphragm 15 psi

12" Diaphragm 10 psi

14" Diaphragm 10 psi

16" Diaphragm 5 psi

18" Diaphragm 5 psi

20" Diaphragm 5 psi

Safely contained means no leakage as well as no bursting. Before using

any of the above data, make sure this entire section is clearly understood.

Other Gases

The Model 441-S is mainly used on natural gas services; however,

this regulator will perform equally as well on other gases. When

using the Model 441-S Regulator on other gases, the regulator

capacities must be adjusted using the correction factors on page 5.

Installation and Maintenance Instructions

Model 441-S Regulator

To Change Spring

1Remove seal cap 1, back off adjusting screw 10, remove

housing cover 5, and remove spring 14.

2Insert the new spring. Be sure it nests correctly onto part 15.

3Complete as per steps 7, 8 and 9 under "To Assemble 441-S".

To Service Diaphragm

1Remove seal cap 1, back off adjusting screw 10, remove

housing cover 5, and remove spring 14.

2Remove bolts 42 and then carefully remove upper diaphragm

case 43.

3Turn diaphragm assembly counterclockwise until 24 unscrews

from 50e or 50i, then remove assembly and inspect

diaphragm.

4If a new diaphragm 20 is required, remove nut 16 and

disassemble.

5Reassemble diaphragm assembly (parts 16, 17, 18, 19, 20,

21, 22, 23, 24).

6Screw diaphragm assembly back into place (24 screws into

50e or 50i until it bottoms) then back off 1/2 to 1 full turn

this is important.

7Carefully reinstall upper diaphragm case 43. Diaphragm must

not be pinched between upper and lower cases, 43 and 40.

Tighten bolts 42 evenly.

8Replace spring, etc., per steps 6 through 9 under

“To Assemble 441-S”.

To Assemble 441-S

1Install orifice 28 through top opening.

2Install valve assembly and orifice 29 per applicable steps 1

through 6 under “To Replace and Adjust Valves” (except that

50e or 50i does not yet screw into 24).

3Install centerpiece and lower diaphragm case, 36 and 40.

4Install diaphragm assembly and upper case 43 per steps

5 through 7 under “To Service Diaphragm”.

5Replace bottom plate 33. Match bottom end of 50h into 31

and /or 32, and then rotate bottom plate either way to first

matching bolt hole position.

6Insert the spring. Be sure it nests correctly onto part 15.

7Insert top spring button 12. Be sure it is nested correctly

on the spring.

8Install housing cover 5. Be sure ball 13 is in place and the

lower end of adjusting screw 10 goes in the hole in button 12.

9Set adjusting screw 10 for desired outlet pressure,

firmly tighten nut 11 and replace seal cap 1.

Over Pressurization Protection

Protection must be provided for the downstream piping system

and the regulator's low pressure chambers to assure against the

potential over pressurization due to a regulator malfunction or a

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

4Hex Cap Screw, 5/16" – 18 x 3/4" 910028

6Spring Cage Cover Gasket 090-16-066-30

7Vent Cap, 1/4" NPT 137-02-505-02

9Spring 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

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 CO2(specific gravity 1.52) 0.63

For other non corrosive gasses use the following formula:

23 24

28 27

32 33

34 35

943

36a

35 36

37a

Installation and Maintenance Instructions

Model 441-S Regulator

2" and 3" Model 441-S

Illustration Part

Number Description Number

Guide Bushing with Pin, brass 090-16-385-01

32 Guide Bushing with Pin, 090-16-385-03

stainless steel

34 Hex Cap Screw, 1/2" – 13 x 1-1/4" 910106

35 Tetraseal (or O-Ring), 904085

4-3/8" x 4-5/8"

36a Tetraseal, 4" x 4-1/4" 904084

37 Centerpiece, Stem Bushing 090-16-373-00

37a Aluminum Seal Ring 090-26-178-00

39 Tetraseal (or O-Ring), 904078

3-1/4" x 3-1/2"

Valve Assembly, 1-3/4",

brass trim, Buna-N 090-16-515-27

(Black, 50-55 Duro)

Valve Assembly,

1-3/4", stainless steel trim, 090-16-515-50

50 Buna-N (Black, 50-55 Duro)

Valve Assembly, 1-1/2",

brass trim, Buna-N 090-16-515-31

(Black, 50-55 Duro)

Valve Assembly, 1-1/2",

stainless steel trim, 090-16-515-51

Buna-N (Black, 50-55 Duro)

50a Valve Retaining Nut, 5/8" – 18 905564

2" and 3" Model 441-S (continued)

Illustration Part

Number Description Number

Valve Retainer, standard,

steel,1-3/4" 090-16-018-00

Valve Retainer, standard, 090-16-018-30

stainless steel, 1-3/4"

Valve Retainer, v-port wings, 090-16-012-53

stainless steel, 1-3/4"

50b Valve Retainer, standard, steel, 090-16-018-01

1-1/2"

Valve Retainer, standard, 090-16-018-31

stainless steel, 1-1/2"

Valve Retainer, v-port wings, 090-16-012-52

steel, 1-1/2"

Valve Retainer, v-port wings, 090-16-012-55

stainless steel, 1-1/2"

50c O-Ring, 5/8" x 13/16" 934012

Molded Valve, 1-3/4", Buna-N 090-16-315-00

(Black, 50-55 Duro) all trim

Molded Valve, 1-1/2", Buna-N 090-16-315-01

50d (Black, 50-55 Duro) all trim

Molded Valve, 1-3/4", Polyurethane 090-16-315-02

(Red, 65-75 Duro) all trim

Molded Valve, 1-1/2", Polyurethane 090-16-315-03

(Red, 65-75 Duro) all trim

50e Female Valve Stem, brass 090-16-116-00

Female Valve Stem, stainless steel 090-16-116-01

Adjustment Clamp Screw, Soc. Hd. 903486

50g Screw, 10–24 x 1/2" Lg.

Adjustment Clamp Screw, 090-16-046-01

for 1-1/2" valve only

50h Male Valve Stem, brass 090-16-016-01

Male Valve Stem, stainless steel 090-16-016-02

2" and 3" Model 441-S

24 25

45 43

37a

de50

20 21

27 28

29 27

35 32

36a

Molded Valve, 3", Buna-N 090-22-315-00

(Black, 50-55 Duro) all trim

Molded Valve, 2-1/8", Buna-N 090-22-315-01

(Black, 50-55 Duro) all trim

Molded Valve, 1-3/4", Buna-N 090-22-315-04

50d (Black, 50-55 Duro) all trim

Molded Valve, 3", Polyurethane 090-22-315-02

(Red, 65-75 Duro) all trim

Molded Valve, 2-1/8", Polyurethane

(Red, 65-75 Duro) all trim 090-22-315-03

Molded Valve, 1-3/4", Polyurethane 090-22-315-05

(Red, 65-75 Duro) all trim

50e Female Valve Stem, brass 090-22-016-40

Female Valve Stem, stainless steel 090-22-016-41

50f Adjustment Clamp Ring, 090-22-043-02

stainless steel

50g Adjustment Clamp Screw, Soc. Hd. 903494

Screw, 1/4" – 20 x 3/4" Lg.

50h Male Valve Stem, stainless steel 090-22-116-01

Stem Extension, stainless, 090-22-058-40

50i for 20" diaphragm only

Stem Extension, stainless, 090-22-058-41

for 18" and smaller diaphragms

Travel Stop, for 3" valves 090-22-040-51

52 Travel Stop, for 2-1/8" and 090-22-040-55

1-3/4" valves

4" Model 441-S (continued)

Illustration Part

Number Description Number

Installation and Maintenance Instructions

Model 441-S Regulator

4" Model 441-S

Illustration Part

Number Description Number

26 Hex Cap Screw, 3/8"–16 x 3/4" Lg., 910053

120,000 tensile

27 O-Ring, for orifices 905583

3" Inlet Orifice, plated steel 090-22-028-00

3" Inlet Orifice, stainless steel 090-22-028-50

28 2-1/8" Inlet Orifice, plated steel 090-22-028-02

2-1/8" Inlet Orifice, stainless steel 090-22-028-52

1-3/4" Inlet Orifice, plated steel 090-22-028-01

1-3/4" Inlet Orifice, stainless steel 090-22-028-51

3" Outlet Orifice, plated steel 090-22-029-00

3" Outlet Orifice, stainless steel 090-22-029-50

29 2-1/8" Outlet Orifice, plated steel 090-22-029-02

2-1/8" Outlet Orifice, stainless steel 090-22-029-52

1-3/4" Outlet Orifice, plated steel 090-22-029-01

1-3/4" Outlet Orifice, stainless steel 090-22-029-51

30 Hex Cap Screw, 3/8" – 16 x 1" Lg. 910055

31 Spin Stop Plate 090-22-040-01

32 Guide Bushing, brass 090-22-074-00

Guide Bushing, stainless steel 090-22-074-01

Hex Cap Screw, 5/8" – 11 x 1-1/2" 910157

34 Hex Cap Screw, 5/8" – 11 x 1-3/4" 910158

for ductile bottom plate

35 Tetraseal (or O-Ring), 904080

6-1/4" x 6-1/2"

36a Tetraseal (or O-Ring), 4" x 4-1/4" 904084

37 Centerpiece Stem Bushing 090-16-373-02

37a Aluminum Seal Ring 090-26-178-00

39 Tetraseal (or O-Ring), 904083

4-1/4" x 4-1/2"

Valve Assembly, 3", brass trim, 090-22-515-30

Buna-N (Black, 50-55 Duro)

50 Valve Assembly, 3", stainless steel, 090-22-515-50

trim, Buna-N (Black, 50-55 Duro)

Note: For other Valve Assemblies see RP 1350

50a Valve Retaining Nut, 3/4" – 16 090-22-034-00

Valve Retainer, standard, iron, 3" 090-22-018-03

Valve Retainer, standard, stainless 090-22-018-00

steel, 3"

Valve Retainer, v-port wings, 090-22-012-20

iron, 3"

Valve Retainer, v-port wings, 090-22-012-40

stainless steel, 3"

Valve Retainer, standard, 090-22-018-01

50b iron, 2-1/8"

Valve Retainer, standard, stainless 090-22-018-31

steel, 2-1/8"

Valve Retainer, v-port wings,

stainless steel, 2-1/8" 090-22-012-51

Valve Retainer, standard, stainless 090-22-018-34

steel, 1-3/4"

50c O-Ring, 13/16" x 1" 904173

Description

4" Model 441-S

Outlet Pressure Ranges – Spring and Diaphragm Combinations

Spring Diaphragm Size – Nominal Inside Diameter

Part Spring (Outside Diameter in parenthesis, Dim.“G” above)

Number Color 20" (23-1/8") 18" (20-5/8") 16" (18-5/8") 14" (16-3/8") 12" (14-3/4") 10" (13-1/8")

090-70-021-00 Aluminum 4

1⁄4" to 6" w.c. 4 1⁄4" to 4 3⁄4" w.c. 5 1⁄4" to 7" w.c. 7" to 10 1⁄2" w.c. 8 1⁄2" to 13" w.c.

090-70-021-01 Green 4 3⁄4" to 7" w.c. 4 3⁄4" to 6 1⁄2" w.c. 7" to 10 1⁄2" w.c. 8 1⁄2" to 12" w.c. 10 1⁄2" to 17" w.c.

090-70-021-02 Yellow 5 1⁄4" to 8 1⁄2" w.c. 6" to 10 1⁄2" w.c. 8 1⁄2" to 15 1⁄2" w.c. 10 1⁄2" to 17" w.c. 12" to 23" w.c.

090-70-021-03 Gray 8 1⁄4" to 13" w.c. 10 1⁄2" to 17" w.c. 14" w.c. to 1 psi 17" w.c. to 1 1⁄4psi 21" w.c. to 1 1⁄2 psi 1 1⁄4to 2 psi

090-70-021-04 Blue 9 1⁄2" to 20" w.c. 16 1⁄2" to 21" w.c. 21" w.c. to 1 3⁄4psi 21" w.c. to 2 psi 1 1⁄4to 2 1⁄2psi 1 1⁄2to 3 1⁄4psi

090-70-021-05 Red 1 1⁄2to 3 3⁄4psi 1 3⁄4to 4 psi 2 1⁄2to 6 psi

2" Model 441-S

3" Model 441-S

4" Model 441-S

Springs are colored for identification. When shipped, the regulator is equipped with the lightest spring suitable for the maximum outlet pressure

specified on order. If outlet pressure conditions change, replace spring accordingly to above table for best operation. For best performance use

the largest diaphragm for the spring and pipe size selected.

For pressures below 4" w.c. install the Model 441-S upside down.

M(Minimum Service Space)

Remove Vent

(If Required)

Vent

10 11

E60

Downstream

Control Line

Control

Connection

Inlet

441-S

Outlet

(Minimum Service Space)

Bypass (If Required)

Regulator F (Face to Face)

Body Type 2" Pipe 3" Pipe 4"Pipe

Screwed 10" – –

Flanged ANSI 125 10" 11-3/4" 13-7/8"

Flanged ANSI 250 10-1/2" 12-1/2" 14-1/2"

Flanged ANSI 300 10-1/2" 12-1/2" 14-1/2"

Pipe Size DE GMN

of 441-S

2" 6" 24" See 5" 7"

3" 6" 24" Table 5" 7"

4" 9-1/2" 26" Below 5" 8"

805 Liberty Boulevard

DuBois, PA 15801

800-375-8875

Fax: (814) 375-8460

www.sensus.com

Limited Warranty

Seller warrants the Goods to be free from defects in materials manufactured by Seller and in Seller’s workmanship for a period of (one(1) year) after tender of delivery (the “Warranty Period”). THIS LIMITED WARRANTY

(A) IS IN LIEU OF, AND SELLER DISCLAIMS AND EXCLUDES, ALL OTHER WARRANTIES, STATUTORY, EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION,

ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OR OF CONFORMITY TO MODELS OR SAMPLES;

(B) does not apply to any Goods which have been (I) repaired, altered or improperly installed; (II) subjected to improper use or storage; (III) used or incorporated with other materials or equipment,

after Buyer or anyone using the Goods has, or reasonably should have, knowledge of any defect or nonconformance of the Goods; or (IV) manufactured, fabricated or assembled by anyone other than the Seller;

(C) shall not be effective unless Buyer notifies Seller in writing of any purported defect or nonconformance within (thirty (30) days) after Buyer discovers or should have reasonably discovered such purported

defect or nonconformance; and

(D) shall only extend to Buyer and not to any subsequent buyers or users of the Goods. Buyer shall provide Seller access to the Goods as to which Buyer claims a purported defect or nonconformance;