Rosemount 3051SFC_A User Manual

79
Reference Manual
00809-0100-4809, Rev DA
Section 4: Operation and Maintenance
September 2015
Operation and Maintenance
4.3 Pak-Lok, Flange-Lok, and Flo-Tap maintenance
The Pak-Lok, Flange-Lok, and Flo-Tap models utilize a packing gland mechanism to sustain a seal
on the process fluid. Periodically the packing rings need to be checked to ensure that they are
continuing to seal properly.
 Check the packing gland for leaks. If a leak is present, check that the nuts are tightened
down on the packing studs. If the leak persists, then the packing rings should be
replaced.
 If the process fluid goes through large degrees of temperature cycling, verify that the
packing is tightened down sufficiently and that the tip of the Annubar sensor is still
secured against the opposite side pipe wall. A leak would indicate the packing has
loosened. Also, excessive vibration of the Pak-Lok, Flange-lok, or Flo-tap model could
indicate the tip of the sensor is no longer secured to the pipe wall. For the Pak-lok or
Flange-lok models, re-tighten the nuts to ensure that the packing is sufficiently
tightened and that the tip of the Annubar sensor is still secured against the opposite
side pipe wall. For the Flo-tap models, tighten the drive nuts or rotate the crank
clockwise until the sensor is secured against the opposite side pipe wall. Re-tighten the
packing gland nuts to ensure that the packing is sufficiently tightened.
 If there is excessive vibration present in the Annubar sensor, immediate attention is
required as the sensor may no longer be secured against the opposite side pipe wall.
This could result in the sensor bending, cracking, or breaking. For the Pak-lok or
Flange-lok models, re-tighten the nuts to ensure that the packing is sufficiently
tightened and that the tip of the Annubar sensor is still secured against the opposite
side pipe wall. For the Flo-tap models, tighten the drive nuts or rotate the crank
clockwise until the sensor is secured against the opposite side pipe wall. Re-tighten the
packing gland nuts to ensure that the packing is sufficiently tightened. If excessive
vibration is still present, contact an Emerson
™
Process Management representative.
 If the packing rings appear brittle, old, or compressed beyond further use, a new set of
rings should be ordered for replacement. Installation instructions can be found in
Section 2: Installation of this manual.
Table 4-1. Replacement Part Numbers for Pak-Lok, Flange-Lok, and Flo-Tap Packing
Model Packing kits Part number
Pak-Lok or Flange-Lok
Sensor Size 1 Grafoil (Standard) 28-503002-920
Sensor Size 2 Grafoil (Standard) 28-503002-921
Sensor Size 3 Grafoil (Standard) 28-503002-922
Sensor Size 1 PTFE (Option P2) 28-503002-910
Sensor Size 2 PTFE (Option P2) 28-503002-911
Sensor Size 3 PTFE (Option P2) 28-503002-912
Flo-tap
485 Sensor Size 1 Grafoil (Standard) 28-505010-900
485 Sensor Size 2/585 Sensor Size 22 Grafoil (Standard) 28-505010-901
485 Sensor Size 3/585 Sensor Size 44 Grafoil (Standard) 28-505010-902
485 Sensor Size 1 PTFE (Option P2) 28-505010-910
485 Sensor Size 2/585 Sensor Size 22 PTFE (Option P2) 28-505010-911
485 Sensor Size 3/585 Sensor Size 44 PTFE (Option P2) 28-505010-912

Rosemount 3051SFC_A Specifications

General

Brand	Rosemount
Model	3051SFC_A
Category	Measuring Instruments
Language	English