Emerson FISHER 6492L User manual

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, D100637X012.

PED 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 outside 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

1/4 NPT SEP 1

Specifications

Maximum Inlet and Outlet Pressures(1)

See Table 2

Outlet Pressure Ranges

See Table 1

Proof Test Pressure

All Pressure Retaining Components have been

proof tested per Directive.

Maximum Temperature Capabilities

Cast Iron: 208°C / 406°F

Steel: 260°C / 500°F

Optional High Temperature Steel and Stainless

Steel Construction: 343°C / 650°F

Installation

WARNING

Only qualified personnel should install

or service a regulator. Regulators

should be installed, operated and

maintained in accordance with

international and applicable codes

and regulations and Emerson Process

Management Regulator Technologies,

Inc. instructions.

If the regulator vents fluid or a leak

develops in the system, it indicates that

service is required. Failure to take the

regulator out of service immediately may

create a hazardous condition.

Personal injury, equipment damage or

leakage due to escaping fluid or bursting

of pressure-containing parts may result

if this regulator is overpressured or

is installed where service conditions

could exceed the limits given in the

Specifications section, or where

conditions exceed any ratings of the

adjacent piping or piping connections.

To avoid such injury or damage, provide

pressure-relieving or pressure-limiting

devices (as required by the appropriate

code, regulation or standard) to

prevent service conditions from

exceeding limits.

Additionally, physical damage to the

regulator could result in personal injury

and property damage due to escaping

fluid. To avoid such injury and damage,

install the regulator in a safe location.

Clean out all pipelines before installation of the

regulator and check to be sure the regulator has not

been damaged or has collected foreign material during

shipping. For NPT bodies, apply pipe compound to

the external pipe threads. For flanged bodies, use

suitable line gaskets and approved piping and bolting

practices. Install the regulator in any position desired,

unless otherwise specified, but be sure flow through

the body is in the direction indicated by the arrow on

the body.

1. The pressure/temperature limits in this installation guide and any applicable standard or code limitation should not be exceeded.

Table 1. Outlet (Control) Pressure Ranges

PILOT TYPE OUTLET PRESSURE RANGE

bar psig

6492L

0.14 to 0.41 2 to 6

0.34 to 1.0 5 to 15

0.90 to 1.7 13 to 25

6492H

0.69 to 2.1 10 to 30

1.7 to 5.2 25 to 75

4.8 to 10.3 70 to 150

6492HT 1.0 to 6.9 15 to 100

5.5 to 17.2 80 to 250

Type 6492

Installation Guide

D103055X014

English – October 2013

Note

It is important that the regulator be

installed so that the vent hole in the

spring case is unobstructed at all times.

For outdoor installations, the regulator

should be located away from vehicular

traffic and positioned so that water, ice

and other foreign materials cannot enter

the spring case through the vent. Avoid

placing the regulator beneath eaves or

downspouts, and be sure it is above the

probable snow level.

Overpressure Protection

The recommended pressure limitations are

stamped on the regulator nameplate. Some type of

overpressure protection is needed if the actual inlet

pressure exceeds the maximum operating outlet

pressure rating. Overpressure protection should

also be provided if the regulator inlet pressure

is greater than the safe working pressure of the

downstream equipment.

Regulator operation below the maximum pressure

limitations does not preclude the possibility of damage

from external sources or debris in the line. The

regulator should be inspected for damage after any

overpressure condition.

Startup

The regulator is factory set at approximately

the midpoint of the spring range or the pressure

requested, so an initial adjustment may be required

to give the desired results. With proper installation

completed and relief valves properly adjusted, slowly

open the upstream and downstream shutoff valves.

Adjustment

To change the outlet pressure, remove the closing

cap or loosen the locknut and turn the adjusting

screw clockwise to increase outlet pressure or

counterclockwise to decrease pressure. Monitor

the outlet pressure with a test gauge during the

adjustment. Replace the closing cap or tighten the

locknut to maintain the desired setting.

Taking Out of Service (Shutdown)

WARNING

To avoid personal injury resulting from

sudden release of pressure, isolate

the regulator from all pressure before

attempting disassembly.

Parts List

Types 6492L and 6492H

Key Description

1 Body

2 Valve Guide

3 Valve Spring

4* Inner Valve

5* Orice

7* Valve Stem

8* Bellows Retainer

9* Bellows

10* Diaphragm

11 Lower Spring Seat, Types 6492H and 6492HT Pilots only

12 Control Spring

13 Upper Spring Seat

14 Spring Case

15 Adjusting Screw, standard spring case only

16 Hex Nut, standard spring case only

17 Cap Screw

18* Diaphragm Gasket

19 Drive Screw

20 Nameplate

24 Diaphragm Plate Assembly, Type 6492L Pilot only

74 Pipe Plug

76 Bleed Restriction

77 Screen

78 Reducing Bushing

87 Sealing Washer, tapped spring case only

TYPE

MAXIMUM ALLOWABLE INLET PRESSURE MAXIMUM OPERATING

OUTLET PRESSURE MAXIMUM EMERGENCY OUTLET PRESSURE

Cast Iron Steel/Stainless Steel

bar psig bar psig bar psig Cast Iron Body Steel/Stainless Steel Body

6492HT - - - - - - - - 20.7 300 17.2 250 - - - -

20.7 bar / 300 psig or main

valve body rating limit,

whichever is lower

6492H 17.2 250 20.7 300 10.3 150

17.2 bar / 250 psig or main

valve body rating limit,

whichever is lower

20.7 bar / 300 psig or main

valve body rating limit,

whichever is lower

6492L 17.2 250 20.7 300 1.7 25 6.9 bar / 100 psig 6.9 bar / 100 psig

Table 2. Maximum Inlet and Outlet Pressures

*Recommended spare part.

Type 6492

74 78

Figure 1. Type 6492H or 6492HT Pilot Assembly

39A3514-B

Figure 2. Type 6492L Pilot Assembly

39A3515-B

APPLY LUBRICANT/SEALANT/ADHESIVE

Type 6492

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[email protected]

Emerson Automation Solutions

For further information on the current

PED revision see Bulletin: D103053X012

or scan the QR code.

Fisher.com

Americas

McKinney, Texas 75070 USA

T +1 800 558 5853

+1 972 548 3574

Europe

Bologna 40013, Italy

T +39 051 419 0611

Asia Pacic

Singapore 128461, Singapore

T +65 6777 8211

Middle East and Africa

Dubai, United Arab Emirates

T +971 4 811 8100

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 International LLC, a

business of Emerson Automation Solutions.

The contents of this publication are presented for information purposes

only, and while 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. All sales are governed by our terms and conditions, which

are available on request. We reserve the right to modify or improve the

designs or specications of our products at any time without notice.

Emerson Process Management Regulator Technologies, Inc 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 Regulator Technologies, Inc. product

remains solely with the purchaser.

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