Melt Bolts are used to close or block existing
melt temperature or pressure vents, where pressure
transducers or temperature thermocouples are no
longer being used. Available in 316 stainless
in various lengths these blank bolts are rated
for pressures in excess of 15,000 PSI.
Rupture Discs are used as over pressure protectors,
when normal running pressures are exceeded. Rupture
Discs are made of stainless steel and fit most
extruders that have melt pressure or melt thermocouple
vents on the barrel.
Rupture Discs are a safety device that release
pressure, should they exceed the pressure that
they are manufactured to collapse at. Rupture
Discs typical burst pressures are 4000, 4500,
5000, 6500, 7500, and 9500. Normal stem lengths
are, 3" and 6" with 1/2- 20 UNF threads
and a hex bolt for installation and removal.
Thermocouples are temperature sensors that are
used in extruders where plastic melt temperatures
need to be measured. Melt Temperature Thermocouples
are ruggedly manufactured in 316 Stainless steel
with flexible armour construction along with a
high temperature plug. Various tip and body sizes
ensure direct replacement of preexisting temperature
Melt Temperature Thermocouplesstandard sizes are
6" stem length with 12" of flex armour.
Longer lengths of bolt sizes and leads are also
available. Normal thread size is a 1/2-20 UNF
in a type J or K Thermocouple calibration.
Melt Pressure Transducers
are highly accurate devices, that ensure a very
high degree of stability and repeatability when
measuring Extruder Melt Pressure.
Melt Pressure Transducers are available in a variety
of ranges from 0 to 20,000 PSI and have overload
pressure capabilities of twice the rated pressure
range. They are high temperature devices that
withstand 750ºF (400ºC) and are available
with built in thermocouples, or with 18"
of flex armour cables.
Melt Pressure Transducers are also available in
EXPLOSION PROOF construction to meet CLASS I,
DIVISION I, Group B, C, and D. Made of Stainless
Steel they have an industrial standard 1/2 - 20
UNF thread along with a hex nut that facilitates
installation and removal. Melt Pressure Transducers
work on strain gauge principles and have the following.