Publicité
Les langues disponibles
Les langues disponibles
4.5
Tighten the locknut on the plug or plug gland
threads using a 1/4" hex wrench.
4.6
Clean the seat and the plug/plug guide assembly.
4.7
Slide the plug guide on to the seat.
4.8
Take the spindle and place one of the spring
washers on the spindle as shown in Figure 1.
Be sure the flange on the spring washer faces
upward toward the spring.
4.9
Assemble the spring on top of the spring
washer along with the other spring washer. Be
sure that the flange on the top spring faces
downward. Set this assembly aside.
4.10 Thread the locknut all the way up on the spring
cylinder threads.
4.11 Thread the locknut all the way on the adjusting
bolt. Thread the adjusting bolt into the spring
cylinder and adjust it in about 1/4".
4.12 Carefully inset the assembled spring and spring
washers and spindle into the spring cylinder.
4.13 Carefully assemble this into the relief valve
body, making sure that the spherical bottom of
the spindle is resting in the cavity of the plug or
plug gland (see Figure 1 & 2).
4.14 Tighten the spring cylinder into the relief valve
body using a spanner wrench. It may be neces
sary to tap the spanner wrench with a
hammer to insure tight contact between the
spring cylinder and the relief valve body.
4.15 Tighten the locknut on the spring cylinder to
50 ft-lbs. (67.9 N.M)
4.16 The valve is now ready to have its' set presure
adjusted.
Section 5.0
Set Pressure Adjustment
NOTE: In order to accurately adjust the set pressure, an accurate pressure mea-
surement device such as a transducer with digital readout or calibrated pressure
gauge should be used.
5.1 Attach the valve inlet to the test bench.
5.2 Pressurize using nitrogen gas backed up by wa-
ter until the valve opens fully. The set pressure is
adjusted with the adjusting bolt. Turn the adjust-
ing bolt until the valve opens at 5% over the set
pressure.
5.3 After this setting is found, bring the pressure
slowly up to the specified set pressure using
nitrogen gas backed up by water while checking
for leaks through the seat with Leak-Tec. The seat
should begin to bubble at the specified cracking
pressure. If it does not, vent the pressure from
the valve, readjust the bolt and repeat steps 5.2
and 5.3. Proceed to step 5.4 if the cracking pres
sure is correct.
5.4 Vent all pressure from the system and repeat
step 5.3 to verify that the pressure is consistent.
5.5 The set pressure should be marked on a tag and
attached to the valve.
5.6 Once the valve has been set, tighten the locknut
on the adjusting bolt.
5.7 Place the gasket into the counterbore provided in
the cap. Torque the cap to 50 ft-lbs. (67.9 N.M)
5.8 Expected accuracy once instructions are
followed: +/- 3% of set pressure
4
Parker Autoclave Engineers
Instrumentation Products Division
Erie, PA USA
www.autoclave.com | Cat. 02-0031ME
Publicité
