T205 Series
5
5. Type T205M requires a downstream control line. Be
sure to install the control line before putting the regulator
into operation. Make the control line as short and
straight as possible and do not install it in a location
where ow may be turbulent. Restrictions in the control
line can prevent proper pressure registration. When
using a hand valve, it should be a full ow valve, such
as a full port ball valve. Install the control line sloping
downward toward the tank to prevent condensation
buildup and avoid low points (or traps) that could catch
liquid. The sensing line must enter the tank above
the liquid level at a point that senses the vapor space
pressure and is free from turbulence associated with
tank nozzles or vents. The control line pipe should be
at least 1/2-inch / 13 mm in diameter and increase
1 pipe size for every 10 feet / 3.05 m of control line, with
setpoint less than 5-inches w.c. / 12 mbar.
6. An upstream shutoff valve is recommended to simplify
maintenance to the regulator. It is advisable to install a
pressure gauge between the upstream shutoff valve and
the blanketing valve.
Overpressure Protection
WARNING
!
Personal injury, equipment damage or
leakage due to escaping accumulated gas or
bursting of pressure-containing parts may
result if this regulator is:
• Overpressured;
• Used with incompatible process uid;
• Installed where service conditions
could exceed the limits given in the
Specications section and on the
appropriate nameplate; or
• Where conditions exceed any ratings of
adjacent piping or piping connections.
To avoid such injury or damage, provide
pressure-relieving or pressure-limiting
devices to prevent service conditions from
exceeding those limits.
If the regulator is exposed to an overpressure
condition, it should be inspected for any
damage that may have occurred. Regulator
operation below the limits specied in
the Specications section and regulator
nameplate does not preclude the possibility
of damage from external sources or from
debris in the pipeline.
Type T205 regulators have an outlet pressure rating lower
than the inlet pressure rating. The recommended pressure
limitations are stamped on the regulator nameplate. Some
type of overpressure protection is needed if the actual inlet
pressure can exceed the maximum operating outlet pressure
rating. Common methods of external overpressure protection
include relief valves, monitoring regulators, shut-off devices
and series regulation. Overpressuring any portion of the
regulators beyond the limits in the Specications section may
cause leakage, damage to regulator parts or personal injury
due to bursting of pressure-containing parts.
Startup, Adjustment and Shutdown
Note
The Specications section and Tables 1 and
2 provide the maximum pressure capabilities
for each regulator construction. Use
pressure gauges to monitor inlet pressure
and outlet pressure during startup.
Startup
1. Open shutoff valves between the tank blanketing
regulator and the tank (both sensing and outlet).
Figure 4. Type T205 Actuator Casing Drainage Schematics
TYPE T205 TYPE T205M
HORIZONTAL PIPELINE
HORIZONTAL PIPELINE
VENT POINTED DOWN
DOWNSTREAM CONTROL LINE
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
LOADING PRESSURE
(1 pages)
(32 pages)
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