Emerson Bettis RPX Series Manuale di installazione e funzionamento

Safety Guide

DOC.SG.BRX.1 Rev. 1

October 2020

Bettis RPX-Series

Rack and Pinion Pneumatic Actuators

Safety Guide

DOC.SG.BRX.1 Rev. 1

Notes

October 2020

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Table of Contents

October 2020

Safety Guide

DOC.SG.BRX.1 Rev. 1

Table of Contents

Section 1: Safety Instructions

1.1 ANSI 534.6 Safety Messages............................... 1

Section 2: General Information

2.1 General Application............................................ 2

2.2 Inspection and Maintenance Schedules.............. 2

2.3 Parts Ordering.................................................... 3

Section 3: Bettis RPX Actuators

3.1 Installation......................................................... 5

3.2 Operation .......................................................... 6

3.3 Maintenance ...................................................... 8

Section 4: Actuator Accessories

Actuator Accessories........................................ 10

Section 5: Instructions for Use in (Potential)

Explosive Areas

5.1 Intended Use.................................................... 11

5.2 Safety Instructions ........................................... 11

5.3 Maximum Temperatures .................................. 13

Safety Guide

DOC.SG.BRX.1 Rev. 1

Notes

October 2020

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Section 1: Safety Instructions

October 2020

Safety Guide

DOC.SG.BRX.1 Rev. 1

Safety Instructions

Section 1: Safety Instructions

Please read these safety warnings, cautions, and instructions carefully

before using the product.

These instructions cannot cover every installation and situation.

Do not install, operate, or maintain this product without being fully

trained and qualied in valve, actuator, and accessory installation,

operation and maintenance.

To avoid personnel injury or property damage, it is important to

carefully read, understand, and follow all of the contents of the

associated instruction manual, including all safety cautions and

warnings. If you have any questions concerning installation, or use of

this product, contact your Emerson sales ofce before proceeding.

1.1 ANSI 534.6 Safety Messages

!WARNING

Indicates a hazardous situation that, if not avoided, could result in

death or serious injury.

!CAUTION

Indicates a hazardous situation that, if not avoided, could result in

minor or moderate injury.

NOTE

Indicates information considered important, but not hazard-related.

Section 2: General Information

October 2020

Safety Guide

DOC.SG.BRX.1 Rev. 1

General Information

Section 2: General Information

2.1 General Application

Bettis Rack and Pinion Pneumatic actuators are intended for the

automation and operation of quarter-turn valves like Buttery, ball

valve and plug valves.

Rack and Pinion actuators can also be used to operate venting louvers

or any other quarter-turn applications.

This product was intended for a specic range of service conditions:

pressure, ambient temperature, operating media, and possibly other

specications. Do not expose the product to service conditions or

variables other than those for which the product was intended.

If you are not sure what these conditions or variables are, contact your

Emerson sales ofce for assistance. Provide the product type, size, serial

number and all other pertinent information that you have available.

2.2 Inspection and Maintenance Schedules

Bettis RPX actuators must be inspected periodically and maintained

as needed. Refer to the maintenance section of manual Bettis RPX

DOC.IOM.BRX.EN for more detailed information. The schedule for

inspection can only be determined based on the severity of your

service conditions. Your installation might also be subject to inspection

schedules set by applicable governmental codes and regulations,

industry standards, company standards, or plant standards.

In order to avoid increasing dust explosion risk, periodically clean dust

deposits from all equipment.

When equipment is installed in a hazardous area (potentially

explosive atmosphere), prevent sparks by proper tool selection and

avoiding other types of impact energy.

Proper care must be taken to avoid generation of static electricity on

the non-conductive external surfaces of the equipment (e.g. rubbing

of surfaces, etc.). The actuator's surface temperature is dependent

upon process operating conditions.

Section 2: General Information

October 2020

Safety Guide

DOC.SG.BRX.1 Rev. 1

General Information

2.3 Parts Ordering

When ordering parts for older products, always specify the type,

size and serial number of the product and provide all other pertinent

information that you can, such as part material, age of the product, and

general service conditions. If you have recongured the product since

it was originally purchased, include that information with your request.

!WARNING

Use only genuine replacement parts. Components that are not

supplied by Emerson should not, under any circumstances, be used in

any BETTIS RPX product. Use of components not supplied by Emerson

may void your warranty, might adversely affect the performance of

the product, and could cause personal injury and property damage.

Section 3: Bettis RPX Actuators

October 2020

Safety Guide

DOC.SG.BRX.1 Rev. 1

Bettis RPX Actuators

Section 3: Bettis RPX Actuators

These safety instructions are limited to BETTIS RPX actuators which

are operating using compressed air. If the application requires use of

a ammable or hazardous gas, you must contact your Emerson sales

ofce for assistance.

Section 3: Bettis RPX Actuators

October 2020

Safety Guide

DOC.SG.BRX.1 Rev. 1

Bettis RPX Actuators

3.1 Installation

!WARNING

DO NOT EXCEED SPECIFICATION. To avoid personal injury and

property damage caused by bursting of parts and to avoid parts

damage, malfunction of control valve, or loss of control of the process

caused by excessive pressure, do not exceed the maximum pressures

or temperatures for this actuator, as given in the applicable product

literature or on the nameplate. Use pressure-limiting or pressure-

relieving devices to prevent the actuator pressure from exceeding

specied limits. If you cannot determine the limits for this product,

contact your Emerson sales ofce before proceeding.

• To avoid personal injury, always wear protective gloves,

clothing and eye wear when performing any installation

• If hoisting the actuator, use a nylon sling to protect the

surfaces. Carefully position the sling to prevent damage

to the actuator tubing and any accessories. Also, take care

to prevent people from being injured in case the hoist or

rigging slips. Be sure to use adequately sized hoists and

chains or slings to handle the assembly. If an actuator/valve

assembly should be lifted, it is strongly recommended to

connect the nylon lifting slings in such way that the actuator

and valve is supported.

• Check with your process or safety engineer for any

additional measures that must be taken to protect against

process media.

• If installing into an existing application, also refer to the

WARNING in the Maintenance section.

• Do not connect a pressure vessel, to the actuator, with

unrestricted media.

• Do not exceed the MAXIMUM stated operating pressures.

• Applying pressure directly to the actuator can turn the

actuator's shaft/Valve stem.

• Applying a control signal to the actuator's solenoid can turn

the Actuator/Valve assembly.

Section 3: Bettis RPX Actuators

October 2020

Safety Guide

DOC.SG.BRX.1 Rev. 1

Bettis RPX Actuators

! WARNING

Stay away from moving parts to prevent serious injury. When test

cycling the actuator and valve assembly by applying pressure to the

A or B port, be aware that there are moving parts like pinion top,

actuator to valve coupling and the valve stem, ball, plug, etc.

Isolate the piping system on which an actuator-valve assembly

is installed, when removing this assembly, and relieve any media

pressure that may be trapped in the valve cavities before removing

the actuator for maintenance.

3.2.1 Operating Media

1. Use clean, dry or lubricated air.

2. Maximum Operating Pressure (MOP) = 8.3 bar/120 psi

(Dynamic)

MOP is the pressure required to produce the maximum rated

torque at the break position for all actuators.

Pressure should not exceed MOP during valve rotation.

MOP should be the maximum pressure regulator setting.

3.2 Operation

!WARNING

When rotating the actuator stem or shaft with loading pressure

applied, use caution to keep hands and tools out of the actuator

travel path. Personal injury and property damage is possible if

something is caught between the actuator stem and other control

valve assembly parts.

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