Parr Instrument 44HC6 Metal Gaskets - Manual

273M
Sealing Instructions for 44HC5 and
44HC6 Metal Gaskets
A torque-wrench should be used to tight-
en the cap screws and seal the reactor.
The torque required to pre-load the metal
gasket is a function of the operating pres-
sure of the bomb.
Table 1 provides recommended torque
levels.
To insure uniform loading, level the head
of the vessel and turn each of the cap
screws fi nger tight. Then use the follow-
ing procedure when tightening with a
torque wrench.
Pick a starting screw and tighten it to
approximately 5 ft-lb. Then by-pass the
adjacent screw and move around the
closure to a screw approximately 180 de-
grees from the start. Torque the second
screw and continue in the same pattern
until all screws are snug at 5 ft-lb. Repeat
this procedure increasing the torque in
5 ft-lb increments until the torque level
shown in Table 1 is reached.
Repeated use of the metal gasket may re-
quire increased bolt torque up to a maxi-
mum of 50 ft-lb. When the gasket does
not seal with 50 ft-lb torque it should be
replaced.
Table 1
Recommended Bolt-Torque for 44HC5 and 44HC6 Metal Gaskets
Pressure (psi) Torque (ft-lb)
2000 10
3000 10
4000 15
5000 25
6000 35
Maximum Torque 50 ft-lb
P
arr
I
nstrument
C
ompany
211 53rd Street • Moline, Illinois 61265 USA 1-309-762-7716 • 1-800-872-7720 • Fax: 1-309-762-9453
E-mail: [email protected] • http://www.parrinst.com
Revision 09/26/12