OSE Slam-Shut Valve Bulletin0 pages

Bulletin 71.6:OSE
March 2010

Type OSE Slam-Shut Valve

W8131

Figure 1. Type OSE Slam-Shut Valve

Features and Benefits
• Overpressure and Underpressure Protection—
Type OSE can be equipped for OverPressure ShutOff
(OPSO), UnderPressure ShutOff (UPSO), Overpressure
and UnderPressure ShutOff (OPSO/UPSO), manual
shutoff, or remote shutoff. In addition, Type OSE utilizes
limit switches for remote alarm upon shutoff when the
valve is tripped.
• Two-Stage Tripping Mechanism—Type OSE
incorporates a two-stage tripping mechanism that
tttttsignificantlytreducestnuisancettrippingtcausedtbyt
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vibrations or inlet pressure variations, which is
commonly found in other shut-off valves.
• NPS 1 through 6 (DN 25 through 150) Body Sizes—
When resetting the trip mechanism the internal bypass
valve opens automatically allowing pressure on each
side of the valve plug to equalize. External bypass
valve (Sizes NPS 8 and 10 (DN 200 and 250)) is
manually operated.

• Water Tight—Type OSE is water tight to 10 feet
(3,0 meters).
• Positive Shutoff—After closing, the slam-shut valve
stays closed until the system is shut down and the
valve is manually reset. An O-ring on the valve plug
seal provides tight shutoff.

Introduction
The purpose of the Type OSE slam-shut device is to
totallytandtrapidlytcuttthetflowtoftgastwhentthetinlettand/ort
t
outlet pressure in the system either exceed or drop below
setpoints. Type OSE consists of a valve, a mechanism box
(BM1 or BM2), and either one or two manometric sensing
devices (BMS1 or BMS2).

D102356X012

• High Accuracy—Rated at +/- 1% to 5% depending on
types, pressures, and service conditions.

• Easy In-Line Maintenance—Top entry design reduces
maintenance time and manpower requirements; parts can
be inspected and replaced without removing the body
from the line.

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