5. Once the cover has been reassembled to the Series CRS separator and the bolts have been appropriately tightened,
close the blowdown valve at the bottom of the separator and open the isolation valves to return the separator to
normal operation.
Service Instructions - Accessories
The Series CRS separator may have optional accessories assembled at the factory, or by the installer at the job site.
These components include a Bell & Gossett No. 98 Air Vent; a blowdown valve; or a skim valve. The factory installed
components come pre-assembled with a leading industrial thread sealant, Loctite 567, and are tightened to
appropriate levels. With that in mind, the following information should help to clarify questions regarding the
adjustment, servicing, or field installation of those components when required.
Any field adjustment of factory installed components will break the original thread seal and could cause leakage. This
will necessitate the removal, cleaning, and resealing of those parts per the instructions below.
Should any adjustment or servicing of air vents, blowdown valves, skim valves, drain plugs, or other accessories be
required, please take the following steps:
1. Completely remove the desired component from the Model CRS Separator.
2. Taking care not to damage any threads on the component or the separator, clean off all of the old thread sealant.
Use a wire brush and gentle abrasion if necessary. Allow the valve and the component to dry. Note: If the component
or valve appears to have been damaged, replace it.
3. Starting with the second thread of the NPT male component, apply a 360° bead of Loctite 567 thread
sealant/lubricant as shown below. Follow Loctite handling precautions as noted on the product labeling.
4. If Loctite 567 is unavailable, recommends RectorSeal No. 5 pipe thread sealant for all non-glycol based
applications, or any PTFE thread sealing tape. Be sure to follow the manufacturer specific handling precautions and
application instructions as noted on the product labeling.
5. Thread component into valve until it is finger tight.
6. Apply torque to the following specification:
CAUTION: Installation and maintenance must be performed by a qualified professional. Service should not
be performed on any valve in an active Hydronic loop. Before attempting to make any required adjustments,
properly isolate and drain the branch loops that require service and allow the valves to reach a safe handling
temperature and zero pressure condition. Use proper safety equipment including gloves, goggles, or similar
tools to avoid contact with system fluids and common hazards. Failure to follow these instructions could
result in personal injury and property damage.
Component
Separator Size
Connection Size
Torque
Skim Valve
2” Through 12”
1/2” NPT
9.0 ft.-lbs + 3.0 ft.-lbs. / -0
Blowdown Valve
2” Through 6”
1/2” NPT
9.0 ft.-lbs + 3.0 ft.-lbs. / -0
8” Through 12”
1” NPT
12.0 ft.-lbs + 4.0 ft.-lbs. / -0
Air Vent
2” Through 12”
1/2” NPT
9.0 ft.-lbs + 3.0 ft.-lbs. / -0
Plug
2” Through 12”
1/2” NPT
9.0 ft.-lbs + 3.0 ft.-lbs. / -0
2” Through 12”
1” NPT
12.0 ft.-lbs + 4.0 ft.-lbs. / -0
