Specifications - Emerson Fisher OS2 Instruction Manual

Type OS2

Specifications

This section lists the specifications for the Type OS2 slam-shut valve. Factory specifications are stamped on the nameplate
fastened on the valve at the factory.
Body Sizes and End Connection Styles
Type OSE
WCC Steel
1 and 2 NPT; NPS 1, 2, 3, 4 and 6 /
DN 25, 50, 80, 100 and 150
CL150 RF, CL300 RF or CL600 RF
LCC Steel
NPS 8 and 10 / DN 200 and 250
CL150 RF, CL300 RF or CL600 RF
Cast Iron
1 and 2 NPT; NPS 1, 2, 3, 4 and 6 /
DN 25, 50, 80, 100 and 150
CL125 FF
Type 627-OSX
WCC Steel
NPS 1 and 2 / DN 25 and 50
(2)
NPT or SWE
Type EZL-OSX
LCC Steel
NPS 2, 3 and 4 / DN 50, 80 and 100
CL150 RF, CL300 RF or CL600 RF
Types EZH-OSX, EZHSO-OSX and EZR-OSX
LCC Steel
NPS 1, 2, 3, 4 and 6 / DN 25, 50, 80, 100
and 150 CL150 RF, CL300 RF or CL600 RF
Maximum Inlet Pressure
(3)
NPT Cast Iron: 400 psig / 27.6 bar
CL125 FF Cast Iron: 200 psig / 23.8 bar
CL150 RF Steel: 290 psig / 20 bar
CL300 RF Steel: 750 psi / 51.7 bar
CL600 RF and NPT Steel: 1470 psi / 101 bar
1. End connections for other than ASME standard can usually be provided. Contact your local Sales Office for assistance.
2. The NPS 2 / DN 50 Type 627-OSX utilizes NPS 1 / DN 25 Type OS2 slamshut components.
3. The pressure/temperature limits in this Instruction Manual or any applicable standard limitation should not be exceeded.
4. The push button connects at the same Type BM2 port as a Type BMS2.
The Types OS2 and OSD2 slam-shut devices can be used
for all pressure ranges from 4.0 in. w.c. to 1470 psig /
10 mbar to 101 bar by simply replacing the manometric
sensing device. The Type OS2 can be configured for
OverPressure ShutOff (OPSO), UnderPressure ShutOff
(UPSO), OverPressure Shutoff and UnderPressure ShutOff
(OPSO/UPSO), manual shutoff or remote shutoff.
Mechanism Box (BM1 or BM2)
The mechanism box (BM1 or BM2, see Figure 2) is designed
to close the slam-shut valve. The detection of pressure
variances is sensed by a double-stage trip mechanism (see
Figure 7). The first stage is the detection stage and will only
trip when the system pressure reaches the set pressure of
the manometric sensing device. The second stage is the
power stage and once tripped by the first stage, the closing
spring causes the valve plug to slam-shut and remain
closed until the valve is manually reset. If there are any inlet
pressure variances or vibrations subjected to the second
2
(1)
(2)
Maximum Set Pressure
1470 psig / 101 bar or maximum body rating,
whichever is lower
Minimum Set Pressure
4.0 in. w.c. / 10 mbar
Outlet Pressure Ranges
See Table 2
Process Temperature Capabilities
-22 to 180°F / -30 to 82°C
Accuracy
+/-2.5% for set pressures at or below 1.45 psig / 0.1 bar
or +/-1% for set pressures above 1.45 psig / 0.1 bar,
+/-5% for the piston Types 27 and 17
Maximum Shutoff Pressure Differential
1470 psig / 101 bar or maximum body rating,
whichever is lower
Pressure Sensing Connections
1/4 NPT
Response Time
<1 second
Pressure Registration
External
Options
• Explosion-proof limit switch for Remote Alarm
• Additional manometric device for extra
pressure sensing
• Manual Push Button Trigger Switch
stage components, they are not transmitted to the first stage
trip mechanism. This unique double-stage trip mechanism
virtually eliminates nuisance tripping commonly found in
other shutoff devices.
Manometric Sensing Device (Type BMS1
or BMS2) (See Figure 2)
Pressure from the system is sensed through control lines
into the manometric sensing device (Type BMS1, BMS2 or
Types BMS1 and BMS2). If the sensed pressure reaches the
setpoint of the manometric sensing device, the device will
activate the tripping mechanism in the mechanism box and
cause the valve to slam-shut.
Remote Shutoff
Remote Tripping is accomplished using a 3-way solenoid
valve installed in the control line of a Type BMS1 or
BMS2 manometric device configured for underpressure
(3)
(4)