Jordan Valve Mark DBAQ Series Angle Style Control Valve - Manual (Page 2)

-2-
4. Lock-out procedures should be strictly
adhered to while the equipment is being
serviced.
5. To ensure a good gasket seal, the gasket
should be replaced upon re-assembly
whenever it becomes disturbed by removing
or shifting gasketed parts.
Packing Lubrication
These instructions are for the lubricator or lubricator
isolation valve (Figure 1). If the lubricator or lubricator
isolation valve have been installed, they will be in
place of the pipe plug and are designed for packing
that requires lubrication, including PTFE composition.
Jordan Valve recommends a silicone based lubricant.
Lubricant is not recommended for oxygen services or for
processes that operate in excess of 500 o F (260 o C). To
add lubricant to the packing box, turn the capscrew in a
clockwise direction.
For Lubricator/Isolating Valve
1. Open the isolating valve.
2. Turn the capscrew in a clockwise direction.
3. Close the isolating valve.
Packing Leakage
Spring-Loaded PTFE V-Ring Packing
To eliminate leakage, tighten the packing flange nuts
(key 18, figure 7). If leakage cannot be controlled in this
manner, the packing will need to be replaced.
Other Packing
If packing other than Spring-Loaded PTFE V-Ring has
been used, attempt to eliminate the leaking and create
a stem seal by tightening the packing flange nuts to
the minimum recommended torque given in Table 5. If
leakage continues, the packing will need to be replaced.
M
ark
DBaQ S
erieS
a
ngle
S
tyle
C
ontrol
V
alVeS
New Packing
If tightening the appropriate flange nuts does not solve
the leakage problem and the packing is relatively new,
leakage could indicate damage to the packing box wall
or to the stem. Inspect the valve stem plug for a good
surface finish as well as the packing box wall for nicks
and scratches that could compromise the seal.
Hint:
If leakage originates from the outside diameter of
the packing, check the packing box wall for nicks or
scratches. If leakage originates from the inside diameter
of the packing, check the stem for nicks or scratches.
Lubricator
Lubricator/ Isolating Valve
Figure 1: Lubricator and Lubricator Isolating Valve