Emerson Fisher N100 Series Manuale utente

N100, N100A, N110, and N120 Series

D450001T012

Instruction Manual

MCK-1008

March 2009

www.emersonprocess.com/regulators/lp

N100, N100A, N110, and N120 Series Differential

Bypass and Backpressure Valves

WARNING

Failure to follow these instructions or

to properly install and maintain this

equipment could result in an explosion,

and/or re causing property damage and

personal injury or death.

Fisher®equipment must be installed,

operated, and maintained in accordance

with federal, state, and local codes

and manufacturer’s instructions. The

installation in most states must also

comply with NFPA. 58 or ANSI

standard K61.1.

Only personnel trained in the proper

procedures, codes, standards, and

regulations of the LP-Gas or Anhydrous

Ammonia industries should install and

service this equipment.

Introduction

Scope of the Manual

This manual covers instructions for the N100, N100A,

N110, and N120 Series Differential Bypass and

Backpressure Valves, shown in Figure 1.

Description

These valves are designed for use with propane,

butane, and anhydrous ammonia at ambient

temperatures. The valves can be used on other

compressed gases, but the user should check with

the factory to make sure the valve is suitable for the

particular service.

A 1/4 NPT tapped and plugged boss on the inlet side

of the body can be used to install a hydrostatic relief

valve or a pressure gauge.

The Types N100, N100A, and N110 have internal sensing

orices so that no external sensing line is required.

N100 and N100A Series Bypass Valves

These valves are designed for bypass applications

on NPS 2 through 4 (DN 50 through 100) size pumps.

The throttling action of the valves allows only surplus

pump discharge to be returned to the tank.

N110 Series Bypass Valve

These valves are designed for bypass applications

on smaller pumps (5 to 40 GPM (18,9 to 151 l/min)

propane) used on stationary tanks or delivery trucks.

N120 Series Backpressure Valve

These valves are intended for use with smaller pumps

on cylinder lling applications. When installed after

the liquid meter, the Type N120 holds a differential

backpressure on the meter to prevent vapor from forming

within the meter. An external sensing line is required.

Figure 1. Bypass and Backpressure Valves

TYPE N100

TYPE N110 TYPE N120

N100, N100A, N110, and N120 Series

Installation

Make sure the ow is in the same

direction as the arrow cast into the

valve body.

Refer to Figures 2 and 3.

Piping to the valve should be kept as short as possible

with a minimum number of pipe ttings. Remove any

pipe scale or foreign material from the piping before

installing the valves.

Specications

Type Numbers, Differential Pressure

Settings and Ranges

See Tables 1, 2, and 3

CAUTION

Maximum Working Pressure

400 psig (27,6 bar)

Temperature Capabilities

-20° to 140°F (-29° to 60°C)

PUMP SIZE TYPE NUMBER BODY SIZE, NPS DIFFERENTIAL PRESSURE

SETTING, PSID (bar d)

DIFFERENTIAL PRESSURE

RANGE, PSID (bar d)

NPS 2 N100A-08-1 1 FNPT 50 (3,4) 25 to 75 (1,7 to 5,2)

N100A-08-2 115 (7,9) 50 to 150 (3,4 to 10,3)

NPS 2 to 3

N100A-10-1 1-1/4 FNPT 50 (3,4) 25 to 75 (1,7 to 5,2)

N100A-10-2 115 (7,9) 50 to 150 (3,4 to 10,3)

N100A-12-1 1-1/2 FNPT 50 (3,4) 25 to 75 (1,7 to 5,2)

N100A-12-2 115 (7,9) 50 to 150 (3,4 to 10,3)

NPS 4

N100-16-1 2 FNPT 50 (3,4) 25 to 75 (1,7 to 5,2)

N100-16-2 2 FNPT 115 (7,9) 50 to 150 (3,4 to 10,3)

N100-20-2 2-1/2 FNPT 50 (3,4) 25 to 75 (1,7 to 5,2)

Table 1.Bypass Valves (For Large Pumps)

LIQUID METER SIZE TYPE NUMBER BODY SIZE, NPS DIFFERENTIAL PRESSURE

SETTING, PSID (bar d)

DIFFERENTIAL PRESSURE

RANGE, PSID (bar d)

NPS 3/4 or 1 N120-06-3 3/4 FNPT 12 (0,83) 10 to 20 (0,69 to 1,4)

N120-08-3 1 FNPT

PUMPING CAPACITY,

GPM (l/min) TYPE NUMBER BODY SIZE, NPS DIFFERENTIAL PRESSURE

SETTING, PSID (bar d)

DIFFERENTIAL PRESSURE

RANGE, PSID (bar d)

5 to 20 (18,9 to 75,7) N110-06-1 3/4 FNPT 50 (3,4) 25 to 75 (1,7 to 5,2)

N110-06-2 100 (6,9) 75 to 150 (5,2 to 10,3)

20 to 40 (75,7 to 151) N110-08-1 1 FNPT 50 (3,4) 25 to 75 (1,7 to 5,2)

N110-08-2 100 (6,9) 75 to 150 (5,2 to 10,3)

Table 2.Bypass Valves (For Small Pumps)

Table 3.Backpressure Valves

The valves can be installed in any position. Make

certain that ow is in the same direction as the arrow

cast on the body.

Use an appropriate pipe compound on the male pipeline

threads. Pull the valve onto the pipe until hand tight and

then wrench tighten it for approximately two additional

turns. Larger size valves may require an additional

amount of torque to obtain a leak free connection.

After installation, pressurize the piping and use a leak

detect solution on all joints to check for leakage. If

leakage is found retighten ttings until leaking stops.

N100, N100A, N110, and N120 Series

Types N100, N100A, and N110 Valves

The Types N100 and N100A (see Figure 2) and

Type N110 (see Figure 3) valve outlet piping should be

connected to the tank vapor space. An external

sensing line is not required for these valves.

Type N120 Valve

The Type N120 (see Figure 3) valve outlet piping

should be connected to the tank piping leading to the

hose reel. A 1/4-inch FNPT connection in the closing

cap connects the external sensing line to the tank

vapor space or vapor eliminator.

Principle of Operation

Types N100, N100A, and N110 Bypass Valves

Tank pressure registers through an orice onto the

spring case side of the inner valve (Type N100 or

N100A) or diaphragm (Type N110). When pump

pressure exceeds the tank pressure by the differential

setpoint of the bypass valve, the inner valve lifts off the

seat allowing ow through the valve back into the tank.

Type N120 Backpressure Valve

Pressure from the tank or vapor eliminator loads the

spring case through the external sensing line. When

pressure downstream of the meter registering on the

body side of the diaphragm exceeds the differential

setpoint the inner valve lifts allowing ow to pass

through the valve.

LIQUID PRODUCT

TO VAPOR

SPACE

N100

SERIES

FISHER®

INTERNAL

VALVE

TO FILLER

VALVE

PUMP

TO VAPOR

SPACE

LIQUID PRODUCT

FISHER

INTERNAL

VALVE

PUMP

TO FILLER

VALVE

TYPE

N110

METER

TYPE

N120

CONNECTION

FROM TANK

VAPOR SPACE

OR VAPOR

ELIMINATOR

HOSE

Figure 2. Types N100 and N100A Series Installation Schematic Figure 3. Types N110 and N120 Installation Schematic

Maintenance

Due to normal wear or damage that

may occur from external sources,

Fisher® equipment must be inspected

and maintained periodically.

The frequency of inspection and

replacement of equipment depends

upon the severity of the service

conditions or the requirements of

local, state, federal regulations, and

manufacturer’s instructions.

Do not use these valves if they leak, fail

to work properly, have missing parts or

have been damaged. A properly trained

serviceman should make prompt repairs

or replace the valve. Continued use

without repair can create a hazardous or

injurious situation.

Only use Regulator Technologies

replacement parts.

Periodically inspect and verify the differential setpoint

of the valves.

Adjustment

Each unit is factory set for the standard differential

pressure or which was specied on the order. Settings

can be adjusted with the ranges specied in Table 1,

2, or 3. Remove the closing cap and turn the adjusting

CAUTION

N100, N100A, N110, and N120 Series

screw clockwise (into the spring case) to increase

the differential setting or counterclockwise (out of the

spring case) to decrease the setting.

Use a pressure gauge on the outlet of the valve to

monitor the change in the differential pressure setting.

Disassembly and Repair

Release inlet and outlet pressure before

starting repair or disassembly. Failure

to do so could result in personal injury.

Note

Numbers in parenthesis ( ) refer to the

key number in the parts list.

Types N100 and N100A Disassembly

Refer to Figure 4:

1. Remove the 4 screws (key 13) and lock washers

(key 19) and remove the spring case (key 2) from

the body (key 1).

2. Replace the O-rings (keys 11 and 15) and the

capseal (key 16). Coat the new parts with Dow

Corning silicone grease or the equivalent reinstalling.

3. O-ring (key 15) t around the outer diameter of the

capseal (key 16). Do not bend the capseal (key 16)

excessively during reassembly in the body (key 1).

4. Replace the inner valve (key 8) and washer

(key 14) if needed. Grease the outside of the

inner valve (key 8) and gently insert it into and

through the capseal (key 16) as far as it will go. A

slight twisting motion of the inner valve (key 8)

may help in reassembly.

Proper valve operation requires that the

registration hole in the inner valve

(key 8) must face towards the outlet and

not be lled with grease.

5. O-ring (key 12) can be replaced by removing

the spring adjustment assembly (key 4) from the

spring case (key 2).

6. After reassembly, pressure test for leakage and

readjust the setpoint.

WARNING

CAUTION

Type N110 Disassembly

Refer to Figure 5:

1. Unscrew the union nut (key 11) and remove the

spring case (key 7) from the body (key 1).

2. To replace the diaphragm (key 4), remove the

diaphragm assembly that includes the

valve plug (key 3).

3. Unscrew the nut (key 6) and remove the

diaphragm head (key 5). Replace the diaphragm

(key 4) and reassemble.

4. O-ring (key 10) can be replaced by removing the

spring adjustment assembly (key 9) from the spring

case (key 7). Coat the new part with Dow Corning

silicone grease or the equivalent before reinstalling.

5. Check the valve plug seat (key 3). Replace if it

is badly scarred or damaged. Make sure that the

2 registration passages are open.

Proper valve operation requires that the

registration hole in the inner valve must

face towards the outlet and not be lled

with grease.

6. Replace the valve guide orice (key 2) if the

seat is badly damaged. A special tool is required

to replace the valve guide orice (key 2).

7. After reassembly, pressure test for leakage and

readjust the setpoint.

Type N120 Disassembly

Refer to Figure 6:

Note

Coat all new O-rings with Dow Corning

silicone grease or the equivalent

before reinstalling.

1. Unscrew the union nut (key 11) and remove the

spring case (key 7) from the body (key 1).

2. To replace the diaphragm (key 4), remove the

diaphragm assembly that includes the

valve plug (key 3).

CAUTION

N100, N100A, N110, and N120 Series

3. Unscrew the nut (key 6) and remove the

diaphragm head (key 5). Replace the diaphragm

(key 4) and reassemble. Reassemble with loctite

on the valve plug (key 3) threads.

4. To replace the O-ring seal (key 17), remove the

screw (key 19) and the O-ring washer (key 18).

Reinstall the screw (key 19) and O-ring washer

(key 18). Place a small amount of Loctite on the

screw (key 19) before reassembly and tighten.

5. Replace the valve guide orice (key 2) if the seat

is badly damaged or O-ring (key 16) is leaking.

A special tool is required to replace the valve

guide orice (key 2). Replace the O-ring (key 16)

and reassemble the valve guide orice (key 2) by

rmly seating into the body (key 1).

6. O-ring (key 10) can be replaced by removing the

seal cap (key 12).

7. After reassembly, pressure test for leakage and

readjust the setpoint.

Parts Ordering

When corresponding with your local Distributor about

this equipment, include the type number and all other

pertinent information printed on the label. Specify

the eleven-character part number when ordering new

parts from the following parts list.

Parts List

Types N100 and N100A Bypass Valve

(Figure 4)

Key Description Part Number

1 Body, Ductile iron

NPS 1 2P384419232

NPS 1-1/4 2P383219172

NPS 1-1/2 2P382719232

NPS 2 3R195119232

NPS 2-1/2 3R195219232

2 Spring Case, Ductile iron

Types N100 and N100A (NPS 1 thru 1-1/2) 1P382819172

Type N100 (NPS 2 and 2-1/2) 2R195419272

3 Closing Cap, Aluminum

Types N100 and N100A (NPS 1 thru 1-1/2) 1P382947062

Type N100 (NPS 2 and 2-1/2) 1P360809022

Figure 4. Types N100 and N100A Bypass Valve Assembly

BP3845

INSTALL OPENING

IN POSITION SHOWN (GREASE

MUST NOT FILL HOLE)

DC - USE DOW CORNING NO. 3 GREASE

AS - USE ANTI-SEIZE ON THREADS

N100, N100A, N110, and N120 Series

Type N100 and N100A Bypass Valve

(Figure 4) (continued)

Key Description Part Number

4 Spring Adjuster Assembly, Aluminum/Stainless steel

Types N100 and N100A (NPS 1 thru 1-1/2) 1P3837000A2

Type N100 (NPS 2 and 2-1/2) 1R1963000A2

6 Spring, Stainless steel

NPS 1 thru 1-1/2

25 to 75 psig (1,7 to 5,2 bar) 1P384137022

50 to 150 psig (3,45 to 10,3 bar) 1P383838992

NPS 2 and 2-1/2

25 to 75 psig (1,7 to 5,2 bar) 1R195537022

50 to 150 psig (3,5 to 10,3 bar) 1R1956T0012

7* Adjusting Screw Gasket

Types N100 and N100A (NPS 1 thru 1-1/2) Nylon (PA) 1P383006162

Type N100 (NPS 2 and 2-1/2), Steel 1P417928992

8* Inner Valve, Stainless steel

Type N100 (NPS 1 thru 1-1/2) 1P383546172

Type N100A (NPS 1 thru 1-1/2) T1157735032

Type N100 (NPS 2 and 2-1/2) 1R195746172

9 Drive Screw, 18-8 Stainless steel (2 required) 1A368228982

Figure 5. Type N110 Bypass Valve Assembly

STAMP TYPE NUMBER, SPRING RANGE, AND DATE

AS - USE ANTI-SEIZE ON THREADS

T10583

Key Description Part Number

11* O-Ring, Nitrile (NBR)

Types N100 and N100A (NPS 1 thru 1-1/2) T12942T0012

Type N100 (NPS 2 and 2-1/2) 1R195806992

12* O-Ring, Nitrile (NBR)

Types N100 and N100A (NPS 1 thru 1-1/2) T12946T0012

Type N100 (NPS 2 and 2-1/2) T12945T0012

13 Screw, Steel (4 required)

Types N100 and N100A (NPS 1 thru 1-1/2) 1V1542X0012

Type N100 (NPS 2 and 2-1/2) T12724T0012

14 Washer, Stainless steel

Types N100 and N100A (NPS 1 thru 1-1/2) 1P383935132

Type N100 (NPS 2 and 2-1/2) 1R196035012

15* O-Ring, Nitrile (NBR)

Types N100 and N100A (NPS 1 thru 1-1/2) T12947T0012

Type N100 (NPS 2 and 2-1/2) T12941T0012

16* Cap Seal,

Polytetrauoroethylene (PTFE)/Molybdenite (MoS2)

Types N100 and N100A (NPS 1 thru 1-1/2) 1P384306442

Type N100 (NPS 2 and 2-1/2) 1R196206442

17 Pipe Plug, Carbon steel T13718T0012

19 Lock Washer, Carbon plated-steel (4 required)

Types N100 and N100A (NPS 1 thru 1-1/2) 1C225728982

Type N100 (NPS 2 and 2-1/2) 1A505628982

*Recommended spare part

N100, N100A, N110, and N120 Series

Figure 6. Type N120 Backpressure Valve Assembly

AS - USE ANTI-SEIZE

ON THREADS

T10695

STAMP TYPE NUMBER,

SPRING SETTING, AND DATE

LOCTITE

GRADE D

PART NOT SHOWN: KEY 15

116 17 19 18

N100, N100A, N110, and N120 Series

The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Fisher is a mark owned by Fisher Controls, Inc., a

business of Emerson Process Management.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or

guarantees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specications of such

products at any time without notice.

Emerson Process Management does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Emerson

Process Management product remains solely with the purchaser.

LP-Gas Equipment

Emerson Process Management

Regulator Technologies, Inc.

USA - Headquarters

McKinney, Texas 75070 USA

Tel: 1-800-558-5853

Outside U.S. 1-972-548-3574

For further information visit www.emersonprocess.com/regulators/lp

Types N110 and N120 Bypass and

Backpressure Valve (Figures 5 and 6)

Key Description Part Number

1 Body, Ductile iron

NPS 3/4 T1058019232

NPS 1 T1058419232

2* Valve Guide Orice, Aluminum T20819T0012

3 Valve Plug, 303 Stainless steel

Type N110 T1058135022

Type N120 T1069235032

4* Diaphragm, Nitrile (NBR) 1E621702052

5 Diaphragm Head, Aluminum T1057809012

6 Nut, Zinc-plated steel T1059325552

7 Spring Case, Ductile iron T1057519232

8 Spring, Stainless steel

25 to 75 psig (1,7 to 5,2 bar) T1057737082

50 to 150 psig (3,5 to 10,3 bar) T1057637082

12 psig (0,83 bar) T1069737022

Key Description Part Number

9 Spring Adjustment Assembly, Steel/Stainless steel

Type N110 T10579000A2

Type N120 T10699000A2

10* O-Ring, Nitrile (NBR)

Type N110 T12946T0012

Type N120 T1069606562

11 Union Nut, Ductile iron 1E471119062

12 Seal Cap, Aluminum

Type N110 1P382947062

Type N120 T1069347062

13* Washer, Nylon (PA) 1P383006162

14 Pipe Plug, Carbon steel T13718T0012

16* O-Ring (Type N120 Only), Nitrile (NBR) 1K314806992

17* O-Ring (Type N120 Only), Nitrile (NBR) T12945T0012

18 O-Ring Washer (Type N120 Only), 303 SST 1D335935072

19 Machine Screw (Type N120 Only), Carbon plated-steel 16A0429X012

*Recommended spare part

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