Data Sheet

Easily Reduce Blanketing Gas Losses.
Plant utility managers, tank farm managers and those with
storage vessel maintenance responsibility can easily reduce
their gas blanketing expense by using low-setpoint technology.
Fisher low-setpoint tank blanketing regulators allow storage
vessel operators to maintain a 1/4-inch water column (w.c.)
(0,6 mbar) for blanketing gas. Such low blanketing pressures
minimize blanketing gas losses by reducing the volume of
gas being forced through poorly sealed breather vents and
incidental escape paths. The cumulative effect of using Fisher’s
low-setpoint technology can result in significant savings.
Easy to Install. Easy to Maintain.
Fisher Controls tank blanketing and vapor recovery systems
offer capabilities no other single regulator manufacturer
can offer. The low-setpoint systems are easy to install, easy
to maintain (if any maintenance is necessary) and are
available in sizes with trim materials to match your storage
vessel application.
Typical Annual Expenses Calculated.
The above table demonstrates the typical incremental annual
expense of nitrogen lost when setpoints above 1/4-inch w.c.
(0,6 mbar) are used. The Universal Sizing Equation was used to
compute the amount of gas lost. To estimate the expense of
the annual gas loss, nitrogen was conservatively estimated at
$2.00/1,000 scf and validated with a major nitrogen supplier.
For more information regarding this potential
money-saving technology:
1-800-558-5853
Outside U.S. 1-972-542-0132
Fax [phone]
e-mail: [e-mail]
or visit our websites:
FISHERregulators.com
TOTALtankmanagement.com
Effective Size of the Escape Path*
1/4" 1/2" 3/4" 1"
(6.4 mm) (12.7 mm) (19.1 mm) (25.4 mm)
1/4" $ 0 $ 0 $ 0 $ 0
1/2" $225 $899 $2,023 $3,596
3/4" $397 $1,589 $3,575 $6,356
1" $543 $2,171 $4,884 $8,683
2" $992 $3,969 $8,931 $15,877
7" $2,330 $9,319 $20,967 $37,275
Tank Pressure in Inches w.c.
* The effective size of the escape path is based on single or multiple escape paths that
may include pinprick holes from a slightly corroded roof, poorly seated vents, etc.
Nitrogen Costs When Higher Setpoints are Used
Savings
Reduce Your Gas Blanketing Expense with
Fisher Regulator Low-setpoint Technology.
FISHERregulators.com
D350860X012 © 2001 Fisher Controls International, Inc. All rights reserved. Printed in the U.S.A.