Emerson VSX4 Series - VSX4 and VSX8 Series Specifications; Configurations and Types; Key Technical Parameters

Specifications
This section lists the specifications for the VSX4 and VSX8 Series controller. The following information is stamped on the
nameplate of VSX4 and VSX8 Series: Type and Class, Maximum Outlet Pressure and Spring Range. Additional operating
information is located on the Regulator nameplate.
1. The pressure/temperature limits in this Instruction Manual or any applicable standard limitation should not be exceeded.
2. Product has passed Emerson testing for shutoff and trip function at -40°F.
Available Configurations
Types VSX4L and VSX8L: Low-pressure controller which
can be integrated into a regulator; with 10 to 1100 mbar /
0.15 to 16 psig downstream pressure
Types VSX4H and VSX8H: High-pressure controller
which can be integrated into a regulator; with 1100 to
4000 mbar / 16 to 58 psig downstream pressure
Controller Type
DS: Differential Strength
IS: Integral Strength
Functional Class
A: Min, Min and Max Installation
B: Max Installation Only
Connections
Controller Vent: 1/4 NPT
External Sensing Line: 1/4 NPT
Maximum Allowable Pressure (PS)
(1)
Differential Strength: 20.0 bar / 290 psig
Integral Strength: 6.0 bar / 87 psig
Specific Maximum Allowable Pressure (PS
d
)
(1)
6.0 bar / 87 psig
Maximum Inlet Pressure (P
umax
)
(1)
Differential Strength (DS): 16.0 bar / 232 psig
Integral Strength (IS): 6.0 bar / 87 psig
Valve Plug Size
VSX4 Series: 24 mm / 0.94 in.
VSX8 Series: 39 mm / 1.54 in.
Operating Temperature (TS)
(1)
According to PED Standards
-20 to 66°C / -4 to 150°F
Non-PED: -30 to 66°C / -22 to 150°F
(2)
Casing Material
Aluminum
Response Time (t
a
)
< 1 second
Resetting Trip Mechanism
Manually after Fault Rectification
Position Indicator
Extended stem visible in center of reset button
Pressure Registration
Internal or External
European EN Reference Standard
EN 14382
Approximate Shipping Weight
1.4 kg / 3.1 lbs
Options
Wire Seal - The VSX4 and VSX8 Series can be ordered
with an optional tamper-proof lock wire to preclude
unauthorized access to the adjustment springs.
Reed switch - An optional remote notification switch can
be installed offering the capability to remotely notify the
operator should VSX8 Series shut off occur. Reed switch is
available on our regulators CSB604/704 Series only.
Operating temperature: -40 to 70°C / -40 to 158°F
Degree of Protection: IP67
Product Marking: CE Ex II 2G Ex mb T6 6b
Cable length: 3 m / 118 in.
Product Description
The VSX4 and VSX8 Series controller are designed to shut off the ow of gas to the downstream system in the event of outlet pressure
rising above or falling below the predened levels.
• The VSX4 and VSX8 Series can be mounted on
various Emerson regulators or be used as standalone
Type VS100 units.
• The VSX4 and VSX8 Series can be integrated in a
slam-shut device Type VS100 installed upstream of the
associated regulator.
• The VSX4 and VSX8 Series controller are equipped with
an internal bypass.
• The VSX4 and VSX8 Series offer either internal or
external pressure sensing line, depending on the
regulator type and/or the specied conditions.
VSX4 and VSX8 Series
2