Bray 768 Series Bedienungsanleitung

SERIES 768

BIDIRECTIONAL SLURRY KNIFE GATE

VALVES – BRAY SLURRYSHIELD

Installation, Operation, and Maintenance Manual

BRAY.COM THE HIGH PERFORMANCE COMPANY

SERIES 768 SLURRY KNIFE GATE VALVES

Installation, Operation, and Maintenance Manual

contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would

violate its proprietary nature without the express written permission of Bray International, Inc.

 Deﬁnition of Terms 

 Introduction 

 Parts Identiﬁcation 

 Valve Identiﬁcation 

 Safety Information 

 Hazard-Free Use 

 Qualiﬁed Personnel 

 Handling Requirements 

 Storage 

 Installation & Commissioning 

 Operation 

 Actuation and Travel Stop Setting 

 Lockout 

 Standard Maintenance 

 Field Adjustments 

 Actuator Conversion 

 Troubleshooting Guide 

 Return Merchandise Authorization 

TABLE OF CONTENTS

SERIES 768 SLURRY KNIFE GATE VALVES

Installation, Operation, and Maintenance Manual

contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would

violate its proprietary nature without the express written permission of Bray International, Inc.

0.0 DEFINITION OF TERMS

All information within this manual is relevant to the safe operation

and proper care of your Bray valve. Please understand the

following examples of information used throughout this manual.

0.0 IDENTIFIES CHAPTER HEADING

0.00 Identiﬁes and explains sequential procedure to be performed.

NOTE: Provides important information related to a procedure.

SAFETY STATEMENTS: To prevent unwanted consequences.

CAUTION

Indicates a potentially hazardous situation which, if not avoided,

may result in minor or moderate injury.

NOTICE

Used without the safety alert symbol, indicates a potential

situation which, if not avoided, may result in an undesirable

result or state, including property damage.

WARNING

Indicates a potentially hazardous situation which, if not avoided,

could result in death or serious injury.

READ AND FOLLOW THESE INSTRUCTIONS CAREFULLY.

SAVE THIS MANUAL FOR FUTURE USE.

SERIES 768 SLURRY KNIFE GATE VALVES

Installation, Operation, and Maintenance Manual

contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would

violate its proprietary nature without the express written permission of Bray International, Inc.

1.0 INTRODUCTION

WARNING

Do not exceed the maximum pressure rating of the valve at any

time during in operation.

1.1 Series 768 is a slurry knife gate valve with two elastomer seats

which provide the bidirectional shut-o; sealing is achieved by

the elastomer sleeves inserted in the valve body from either

side. A secondary seal around the gate prevents leakage to the

atmosphere.

For all pressure and temperature capabilities of the valve, please

refer to relevant Bray brochures.

1.2 Additional product information (such as application data,

engineering speciﬁcations, actuator selection, etc.) is available

from your local Bray distributor or sales representative, or online

at BRAY.COM

For complete details on the latest product certiﬁcations,

visit BRAY.COM/Certiﬁcations.

SERIES 768 SLURRY KNIFE GATE VALVES

Installation, Operation, and Maintenance Manual

contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would

violate its proprietary nature without the express written permission of Bray International, Inc.

Figure 1: Series 768 Exploded View

Item Description

 Body

 Seat

Gate

 Secondary Seal

 Gland Plate

 Gland Plate Fasteners & Washers

 Body Mounting Bolt & Washer

 Body Mounting Nut & Washer

 Grease Nipple

 Body O-Ring

 Drain Plate Gasket (optional)

 Drain Plate (optional)

 Drain Plate Fasteners & Washers (opt)

 Drain Plug (optional)

 Stem Guard

 Stem Guard Bolt & Nut

 Travel Stop Fastener

 Travel Stop

 Handwheel

 Grub Screws

 Handwheel Assembly Housing

 Thrust Bearing

 Stem

 Stem Nut

 Clevis

 Clevis Bolt

 Clevis Lock Nut

 Bellows

 Bellows Flange

 Bellows Mounting Fasteners

 SuperstructureTower Assembly

 Lock Out Bracket

 Locating Bush

2.0 PARTS IDENTIFICATION

SERIES 768 SLURRY KNIFE GATE VALVES

Installation, Operation, and Maintenance Manual

contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would

violate its proprietary nature without the express written permission of Bray International, Inc.

3.0 VALVE IDENTIFICATION

3.1 All valves, actuators, or control products are provided with an

identiﬁcation tag that is unique to each device. The following

table is a representation of information that may be included.

Data Label Description

Serial Number SERIAL NUMBER Unique serial number of valve

Valve Size SIZE Valve size eg  in mm

Model MODEL Series number of the Valve

Flange Drill FLG DRILL Flange Drill eg ASME B

CL

Temperature Limits MAX TEMP Maximum temperature in

FC

Maximum Permissible

Pressure CWP Maximum permissible pressure

in psibar(g)

Body Material BODY Material grade of body eg

CF () etc

Gate Material GATE Material grade of gate eg 

Stainless Steel

Packing Material PACKING Material of packing eg PTFE

wEPDM Quad Seal

Seat Material SEAT Material of seat eg Buna-N

SERIES 768 SLURRY KNIFE GATE VALVES

Installation, Operation, and Maintenance Manual

contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would

violate its proprietary nature without the express written permission of Bray International, Inc.

4.0 SAFETY INFORMATION

NOTICE

Failure to follow these procedures could aect product warranty.

WARNING

> The valve must only be installed, commissioned, operated,

and repaired by qualiﬁed personnel.

> The device generates a large mechanical force during normal

operation.

> All installation, commissioning, operation, and

maintenance must be performed under strict observation

of all applicable codes, standards, and safety regulations.

> Observe all applicable safety regulations for valves installed

in potentially explosive (hazardous) locations.

WARNING

This valve will discharge media during cycling. This is normal

operation and required to maintain a fully functioning valve. Do

not install this valve over walkways, roadways, electrical or other

equipment without the use of a discharge containment system.

SERIES 768 SLURRY KNIFE GATE VALVES

Installation, Operation, and Maintenance Manual

contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would

violate its proprietary nature without the express written permission of Bray International, Inc.

5.0 HAZARD-FREE USE

NOTICE

Failure to follow these procedures could aect product warranty.

5.1 This device left the factory in proper condition to be safely

installed and operated in a hazard-free manner. The notes and

warnings in this document must be observed by the user if this

safe condition is to be maintained and hazard-free operation of

the device assured.

5.2 Take all necessary precautions to prevent damage to the valve

due to rough handling, impact, or improper storage. Do not use

abrasive compounds to clean the valve, or scrape metal surfaces

with any objects.

5.3 The control systems in which the valve is installed must have

proper safeguards — to prevent injury to personnel, or damage to

equipment — should failure of system components occur.

5.4 The upper limits of permitted pressure and temperature

(depending on the housing and liner materials) must be

observed. These limits are shown on the valve identiﬁcation tag.

5.5 The valve must not be operated until the following documents

have been observed:

> Declaration on EU Directives

> IOM Manual (supplied with the product).

SERIES 768 SLURRY KNIFE GATE VALVES

Installation, Operation, and Maintenance Manual

contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would

violate its proprietary nature without the express written permission of Bray International, Inc.

6.0 QUALIFIED PERSONNEL

NOTICE

Failure to follow these procedures could aect product warranty.

6.1 A qualiﬁed person (in terms of this document) is one who is

familiar with the installation, commissioning, and operation of the

device, and who has appropriate qualiﬁcations, such as:

6.1.1 > Is trained in the operation and maintenance of electrical

equipment and systems in accordance with established safety

practices.

6.1.2 > Is trained or authorized to energize, de-energize, ground, tag,

and lock electrical circuits and equipment in accordance with

established safety practices.

6.1.3 > Is trained in the proper use and care of personal protective

equipment (PPE) in accordance with established safety

practices.

6.1.4 > Is trained in the commissioning, operation, and maintenance of

equipment in hazardous locations — in cases where the device

is installed in a potentially explosive (hazardous) location.

SERIES 768 SLURRY KNIFE GATE VALVES

Installation, Operation, and Maintenance Manual

contained herein shall not be copied, transferred, conveyed, or displayed in any manner that would

violate its proprietary nature without the express written permission of Bray International, Inc.

7.0 HANDLING REQUIREMENTS

7.1 Packed Valves

7.1.1 Crates: Lifting and handling of the packed valves in crates will be

carried out by a fork lift truck, by means of the appropriate fork

hitches.

7.1.2 Cases: The lifting of packed valves in cases will be carried out in

the lifting points and in the center of gravity position which has

been marked. The transportation of all packed material must be

carried out safely and following the local safety regulations.

7.2 Unpacked Valves

7.2.1 Lifting and handling of valves should be carried out by using

appropriate means and observing the carrying limits. Handling

must be carried out on pallets, protecting all machined surfaces

to avoid any damage.

7.2.2 With large bore valves, rigging the load must be carried out by

using the appropriate tools to prevent the valve from falling or

moving during the lifting and handling.

CAUTION

For handling and/or lifting, the lifting equipment (fasteners,

hooks, etc.) must be sized and selected while taking into account

the product weight indicated in our packing list and/or delivery

note. Lifting and handling must be performed only by qualiﬁed

personnel.

Fasteners must be protected by plastic covers in sharp corner

areas.

Caution must be taken during handling to avoid this equipment

passing over workers, or over any other place where a possible

fall could cause injury or damage. In all cases, local safety

regulations must be respected.

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