Fig. 1 Sight Feed Indicator (SFI) Assembly
Thank you for choosing "INFERNO" products. Inferno
products are designed and constructed to give satisfactory
performance in a wide range of environmental and operat-
ing conditions. If the correct design and materials were
specified at the time of purchase, satisfactory service will
depend on reasonable care in the subsequent installation,
operation, and maintenance of the product.
INSTALLATION
To help ensure trouble-free operation of your sight feed
indicator (SFI), read this Instruction Manual carefully and
follow its recommendations. Failure to follow any instruc-
tion could possibly result in a malfunction of the gage or
glass breakage during service, which can cause property
damage or bodily injury.
Before installing the gage the following items should be
considered:
• Check for suitability of the SFI in service before
installing.
• Check chemical compatibility of process with materials
of SFI construction.
• Check maximum pressure and temperature of service
with ratings of the SFI (see Fig. 1). Do not exceed ratings
of the SFI in service.
Fig 2- SFI Pressure & Temperature Rating
OPERATION
A. Hydrostatic Test
We recommend a hydrostatic test on the gage assembly at
1.5 times the operating pressure whenever possible, espe-
cially in high pressure applications. The SFI is factory test-
ed to 1.5 times the rated pressure and does not need to be
re-tested at time of installation. However, if glasses and
seals have been replaced during maintenance, then the SFI
should be re-tested by the user.
CAUTION:
DO NOT USE WRENCH ON GLAND
NUTS. If a leak develops during testing, do not use wrench
to tighten gland nuts. Wait until the pressure has been vent-
ed to atmosphere before attempting any work on the SFI.
Hand-tight the gland nuts. If it does not eliminate the leak,
disassemble the SFI and follow the maintenance procedure.
B. Starting Up
If a large temperature difference exists between the SFI and
process fluid, raise or lower the temperature slowly by
cracking the connecting valves open. Do not open the
valves all the way until the SFI is either fully warmed up or
cooled down. The glass used in the SFI is tempered borosil-
icate glass that can stand large temperature shocks. But the
amount is limited by other factors such as stresses imposed
during installation which reduces the glass resistance to
thermal shock.
INFERNO
Installation Instruction: M991012 Rev B
Rev. Date:10-30-12
Replaces: 9-06
I
NSTALLATION
/ O
PERATION
/ M
AINTENANCE
I
NSTRUCTION
6000# SIGHT FEED INDICATOR
GLAND NUT
Nozzle
Glass
M
ODEL
SFI-6000
