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TOMCO/BETA Pressure Relief Valves Pressure Relief Valves & Liquid Level Gages H-J International, Inc.
3010 High Ridge Blvd High Ridge, Missouri USA 63049
Tel: (636) 677-3421 Fax: (636) 376-1915
www.h-jinternational.com
H-J International, Inc. 3010 High Ridge Blvd High Ridge, Missouri, USA 63049
Tel: (636) 677-3421 Fax: (636) 376 - 1915
Web: www.h-jinternational.com
Rev: 1
Dated: 06/01/2002
H-J International, Inc.
TOMCO/BETA Pressure Relief Valves
Pressure
Relief Valves
& Liquid Level
Gages
Liquid Level Indicators
TOMCO liquid level gages
provide a low-cost, non-mechanical,
non-electric, easily installed method
of instantly checking fluid levels
from an easily viewed top or bottom
location.
The length of the liquid level gages
rod must be specified so as to
correctly reach the minimum safe
level of the contained fluid. When
the refraction cone at the tip of the
rod is covered by the stored liquid,
a black dot appears in the white
viewing port. When the liquid level
drops below the refraction cone, the
viewing port appears bright red-the
international warning color
demanding immediate attention and
action.
Liquid Level
Gages
Model SG35
Fluid Level Sight Gage
Model LG35
Liqiid Level Gage
TOMCOS sight gage is a
universally applicable liquid level
indicator for side mounting into
supply tanks, transformer cases
and other containers where
maintenance of proper liquid level
is important.
A metal hollow-ball float makes
visual assessment easy even when
light colored liquids or poorly
lighted surroundings make the
fluid line difficult to see.
Sight Gage
A time saving feature of TOMCO/
BETA pressure relief valves is that
Teflon tape is pre-applied to the
threads in order to assure leak proof
installation on all valves supplied
with ¼ NPTF threads. The first 1-
1/2 threads are Teflon-free to
eliminate potential for tape
shredding into, and contaminating,
the transformer interior.
TOMCO/BETA valves may be
retrofitted into oil filler holes or
into holes drilled or punched into
the transformer wall.
Submersible Stainless Steel Pressure Relief
Valve
Cracking pressure: 10 psig ±
2. Reseats at 7 psig
± 2.
Seals against vacuum.
Solid, machined, 300 series
stainless steel body.
Stainless steel spring, guide, cup
and pull ring.
Redundant Viton double-sealing
system eliminates any potential
for seepage or admission of
fluids as a result of venting.
All series 1720K valves are
thoroughly tested for cracking
pressure, reseating pressure and
leakage potential.
Submersible PRV
1720K-1
Stainless Steel Submersible PRV
Pull ring permits manual
venting as a safety measure
before field or shop servicing
of transformer.
Heat-treated spring prevents
temperature/time fatigue.
MODEL 1720K-1
The 1720K-1 is ideally suited for
use underwater and in harsh
environments.
Thread Sealant & Retrofit Installation
TOMCO/BETA Valve Threads
File: NEW Pressure Relief Device brochure II Compact Pressure Relief Valves
Model 1776K
Standard Distribution Transformer PRV
Cracking pressure: 10 psig ±
2. Reseats at 7 psig
± 2.
(Other cracking pressures
available. Please consult
factory for details.
Seals against vacuum.
Solid, machined brass body
and poppet.
302 stainless springs, guide,
Bug-Out disc and pull ring.
Viton seal for heat, ozone and
weather resistance.
Advanced metallurgical heat
treatment of spring prevents
temperature/time fatigue.
High strength precision rolled
threads with Teflon tape pre-
applied.
Series 1776K meets or exceeds
ANSI C-57.12.2 specifications.
Cracking pressure: 10 psig ± 2.
Reseats at 8 psig
± 2. (Other
cracking pressures available.
Please consult factory for
details.) 4-25 psig.
Seals against vacuum.
Body, poppet, inner cap and
chain are machined from solid
brass for longer service life.
Viton seal for heat, ozone, and
weather resistance.
Highly visible vinyl caps,
colored bands or discs signal
that venting has occurred.
Stainless steel pull ring permits
manual venting as a safety
measure before servicing
transformer.
MODEL 1776 K
Complete with Bug-Out disc and
pull ring for manual pressure
release. ¼ NPTF mounting thread.
MODEL 1776 K-3
Same as 1776-K but with ½ 13
NC mounting thread.
1712K Series Valves
High Flow Pressure Relief Valves
Cracking pressure: 10 psig ±
2. Reseats at 8 psig
± 2. (Other
cracking pressures available.
Please consult factory for
details.) 4-25 psig.
Seals against vacuum.
Solid, machined brass body,
poppet and sleeve.
302 stainless steel spring,
guide, Bug-Out disc and
pull ring.
Viton seal for heat, ozone and
weather resistance.
Advanced metallurgical heat
treatment of spring prevents
temperature/time fatigue.
High strength precision rolled
threads with Teflon tape pre-
applied.
Signal bands of solid injection
molded plastic will not flake off
like painted-on bands do.
Series 1750K valves are
especially valued where space
is limited.
Standard PRV
1750K-5
Compact Design PRV
Compact PRV
High Flow PRV
High Flow Pressure Relief Valves
MODEL 1712K
Red vinyl signal-cap hangs down
after automatic relief. This cap,
which is connected to the poppet by
a chain, can be pulled for manual
pressure relief.
MODEL 1712K-1
Same as 1712K with the addition of
a pull ring for manual pressure
release by hand or hot stick.
MODEL 1712K-4
Same as 1712-K except white
vinyl signal-cap hangs down after
automatic relief revealing bright
red signal band.
MODEL 1712K-5
Same as 1712K-4 with the addition
of a pull ring for manual pressure
release by hand or hot stick.
MODEL 1712K-6
Same as 1712K-5 except relief
signal is a Day-Glo red Bug-Out
disc instead of red signal band on
valve body.
MODEL 1712K-3
Recommended for applications
where a signal-cap is not needed.
It has a pull ring for manual
pressure release.
Quality In a Lower Priced
Valve
Mounting threads are Teflon
treated to assure leak proof
installation.
Bug-Out disc prevents
insects, dirt and the elements
from entering the valve interior
during either static or venting
modes.
There is a TOMCO/BETA relief
valve to suit any need.
TOMCO/BETA relief valves
meet or surpass REA and ANSI
distribution transformer
standards.
Specify TOMCO/BETA relief
valves on new transformers
retrofit them during
maintenance and rebuilding
programs.
ENGINEERING
TOMCOS fluid system products
are among the most thoroughly
engineered in the industry. They
have long enjoyed a well-deserved
reputation for reliability and value
as original equipment and
maintenance/repair parts for a
wide range of fluid applications.
Made in the U.S.A., TOMCOS
products enjoy worldwide
acceptance. They have become
integral to a continuously
increasing number of high-quality
products manufactured in
industrialized nations around the
globe.
Pressure Relief Valves
TOMCO/BETA relief valves are
engineered to protect against
distribution transformer damage and
personnel injury that may result
from dangerous pressure build-ups:
Automatically vent
Automatically reseat
Easily installed
MODEL 1750K-15
White vinyl signal-cap hangs down
after automatic relief revealing a
bright red signal band on the body.
The stainless steel pull ring allows
manual pressure release by hand or
hot stick.
MODEL 1750K-5
Gray weather-cap moves forward on
shaft as a result of automatic relief
revealing a bright red signal band
on the body. The stainless steel pull
ring allows manual pressure release
by hand or hot stick.
MODEL 1750K-3
Designed for application where a
signal-cap or band is not needed. It
has a manual pull ring and a
stainless steel Bug-Out disc.
High strength precision rolled
threads with Teflon tape pre-
applied.
Models with vinyl caps are
ideally suited for outdoor use as
the caps provide a double
weather seal.
Bug-out disc prevents insects
or contaminants from entering
valve interior when the cap is
not on the valve.
Series 1712 K is the industrys
most frequently specified relief
valve.
Rev: 1
Dated: 06/01/2002
H-J International, Inc.