Emerson Fisher OS2 Instruction Manual

Instruction Manual
D102778X012
June 2019
Type OS2 Slam-Shut Device
WARNING
!
Failure to follow these instructions or to
properly install and maintain this equipment
could result in an explosion and/or fire
causing property damage and personal injury
or death.
Fisher™ slam-shut devices must be installed,
operated and maintained in accordance
with federal, state and local codes, rules
and regulations and Emerson Process
Management Regulator Technologies,
Inc. instructions.
If the slam-shut device vents gas or a leak
develops in the system, service to the unit
may be required. Failure to correct trouble
could result in a hazardous condition.
Call a gas service person to service the
unit. Only a qualified person must install or
service the slam-shut devices.
Introduction
Scope of the Manual
This instruction manual provides installation, maintenance
and parts ordering information for the Types OS2 and
OSD2 slam-shut devices for the Types OSE, 627-OSX,
EZH-OSX, EZHSO-OSX, EZL-OSX and EZR-OSX. For
further instructions on the Types 627, EZH, EZHSO, EZL
or EZR refer to the corresponding instruction manual of
these products.
Description
Slam-shut devices are used to totally and rapidly cut off
gas flow when the inlet and/or outlet pressure in the system
either exceeds or drops below the setpoints. The Types OS2
and OSD2 slam-shut devices consist of a valve, mechanism
box (BM1 or BM2) and either one or two modular sensing
elements called manometric devices (Type BMS1 or BMS2)
(see Figure 2).
TYPE E
VALVE
BODY
W8133
TYPE OSE STAND-ALONE SLAMSHUT
TYPE EZR
REGULATOR
W8136
TYPE EZR-OSX
Figure 1. Type OS2 Slam-Shut Device on
Types OSE and EZR-OSX Constructions
Type OS2
TYPE OS2
SLAM-SHUT
DEVICE
TYPE OS2
SLAM-SHUT
DEVICE