Bell & Gossett V1000520 Ultra Setter Pressure Independent Control Valves - Manual (Page 17)

Reseal the valve
The P/T readout ports and drain plugs come pre-assembled with a leading industrial
thread sealant, Loctite, and are tightened to appropriate levels. Any field adjustment of
factory installed components breaks the original thread seal and could cause leakage. This
adjustment necessitates the removal, cleaning, and resealing of those parts per the
following instructions.
1. Remove the desired component from the valve.
2. Clean off all of the old thread sealant using a wire brush and gentle abrasion if
necessary.
If the component or valve appears to have been damaged, replace it.
3. Starting with the second thread of the NPT male valve component, apply a 360º bead
of Loctite 567 thread sealant/lubricant as shown. Follow Loctite handling precautions
as noted on the product label.
4. If Loctite is not available, it is recommended that you use 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 precaution and application instructions as
noted on the product label.
5. Thread component into the valve until it is finger tight.
6. Apply torque to the following specification:
Size Type Torque
1/4” NPT P/T Readout Port, drain plug 9.0 ft-lbs. + 3.0 ft-lbs. / 0
NOTICE:
The use of thread sealants and lubricants on threads also provides lubricity. Over-
application of torque can damage to the valve port or component.
7. Properly assembled valve components will immediately seal to moderate pressure
(100 PSI or less). For maximum pressure resistance, allow the Loctite 567 or RectorSeal
No. 5 thread sealant to cure for 24 hours. PTFE tape typically does not require curing
to achieve maximum pressure resistance.
Maintenance
Ultra Setter ™ Pressure Independent Control Valves Installation, Operation and Service Manual 15