Emerson Fisher OS2 Instruction Manual page 10

Slam-shut device

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Type OS2

SLIDING

TRAVEL STOP

CLEVIS

VALVE OPEN

E0611

SLAM-SHUT VALVE OPEN

TRAVEL STOP

VALVE CLOSED

E0613

RESET DETECTION STAGE (FIRST STAGE)

nOTE: OriEnTaTiOn SHOWn iS FOr TyPE OSE. OriEnTaTiOn FOr TyPES EZHOSX, EZrOSX anD EZLOSX iS rOTaTED 180°.

RESET PIN WITH WHITE DOT

SECOND

STAGE

RELEASING

SHAFT

STEP A

Figure 7. Mechanism Trip Stages

TRAVEL STOP

VALVE CLOSED

E0612

SLAM-SHUT VALVE CLOSED

TRAVEL STOP

STEP B

VALVE OPEN

E0614

RESET POWER STAGE (SECOND STAGE)

RESETTING

TOOL

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Fisher osd2