SEVERE SERVICE BALL VALVE

INTRODUCTION

The Series metal seated severe service ball valve is designed in accordance with ASME B16.34 and ASME .The Series is designed as a free floating ball valve with metal seats. It is important to install the valve in the pipe as intended    to achieve optimal performance. If there are any questions,

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The Series can be configured for unidirectional or

bidirectional flow. The preferred flow direction and high pressure side is indicated on the valve. Proper attention must be paid to    ensure that the valve is installed according to the preferred flow   direction and designated high pressure side.

The preferred flow direction is indicated on the nameplate or valve.

The severe service ball valve is designed to handle entrained    solids and the corresponding abrasive/erosive conditions that are associated with such applications. Depending upon the specific     application, the M1 may be equipped with purge port and/or

flushing ports in order to flush particulates from the body cavity, prevent scaling, or remove accumulated media. Please refer to

the trim of your specific product for the corresponding seat

design and presence of such ports. Proper trim and maintenance greatly extends the life of the valve in these harsh environments

Special Conditions for Safe Use

The following factors must be carefully considered in order to

ensure the valve is compatible with the atmosphere in which it   is applied. The system designer and/or end user should formally address each severe service ball valve and carefully document

the reasoning behind specific measures taken to ensure

continued compliance throughout the life of the severe service ball valve.

Material Considerations

Titanium is not to be used in Group I mining applications and     Group II Category 1 equipment, due to the potential of ignition from sparks caused by mechanical impacts. Please consult

factory for details regarding material limitations

Temperature Considerations

The Series severe service ball valves are designed in accordance

with ASME B16.34 pressure/temperature ratings and are

suitable for operating temperatures up to 593 °C (1,100°F),

depending on the materials of construction. Custom designs are  available upon request and the pressure and temperature ratings will be marked on the valve tagging. Service media should be

considered when evaluating pressure and temperature ratings.

The system designer is responsible for ensuring the maximum temperature, either inside the valve body or on the external

surface, will remain well below the ignition temperature of the atmosphere. Additional protective devices may be required

to ensure a sufficient thermal safety margin including but not limited to: thermal shut off devices and cooling devices.

For operating temperatures above 200°C (392°F) Bray recommends thermal insulation of the valve body.

Static Electricity Considerations

Where the process medium is a liquid or semi-solid material with a surface resistance in excess of 1 G-ohms, special precautions

should betaken to ensure the process does not generate

electrostatic discharge. This may be done through ensuring the   flow rate of the process media remains below 1 m/s or providing sufficient discharge points along the process path to eliminate

electrostatic buildup.

Appropriate grounding may be necessary through the use of grounding straps or other means.

Stray Electric Current Considerations

When the severe service ball valve is used near sources of high   current or magnetic radiation, a secure bonding to earth ground should be made so as to prevent ignition due to inductive

currents or a rise in temperature due to these currents.

Entrained Solids & Process Media

Special consideration should be made regarding the filtration of the process medium if there is a potential for the process

medium to contain solid particulates. The process medium is   recommended to be filtered to allow particles no greater than 1.0 mm in diameter through the valve assembly where there

is a high probability of solid particulates. Larger particulate

sizes may be deemed appropriate based on the possibility

of particulates within the process medium and the area

classification. The decision regarding filtration levels and limits

should be well documented by the system designer and/or end user to ensure continued compliance through the life of the

valve.

HAZARD FREE USE

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.

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.

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.

The upper limits of permitted pressure and temperature

(depending on the valves materials of construction) must be

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

The valve must not be operated until the following documents have been observed:

>   Declaration on EU Directives

>   IOM Manual (supplied with the product).