Parr Instrument 44HC6 User Manual

Sealing Instructions for 44HC5 and
44HC6 Metal Gaskets

273M

A torque-wrench should be used to tight­en the cap screws and seal the reactor.
The torque required to pre-load the metal
gasket is a function of the operating pres­sure 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 follow­ing procedure when tightening with a
torque wrench.

Table 1

Recommended Bolt-Torque for 44HC5 and 44HC6 Metal Gaskets

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 de­grees 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 re­quire increased bolt torque up to a maxi­mum of 50 ft-lb. When the gasket does
not seal with 50 ft-lb torque it should be
replaced.

Revision 09/26/12

Pressure (psi) Torque (ft-lb)

2000 10
3000 10
4000 15
5000 25
6000 35

Maximum Torque 50 ft-lb

P

arr Instrument Company

211 53rd Street • Moline, Illinois 61265 USA 1-309-762-7716 • 1-800-872-7720 • Fax: [phone]

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