Jordan Valve Mark DBAQ User Manual
I & M Mark DBAQ Series
3170 Wasson Road • Cincinnati, OH 45209
Phone 513.533.5600 • Fax 513.871.0105 (f)
info@richardsind.com • www.jordanvalve.com
Warning: Jordan Valve Control Valves must only be used, installed and repaired in accordance with these Installation & Maintenance Instructions. Observe all applicable public and company codes and regulations. In the event
of leakage or other malfunction, call a qualified service person; continued operation may cause system failure or
a general hazard. Before servicing any valve, disconnect, shut off, or bypass all pressurized fluid. Before disassembling a valve, be sure to release all spring tension.
IntroductIon
Contained in this manual are installation instructions,
maintenance and parts information for the Mark DBAQ
Series Control Valves. Refer to the appropriate manuals for instructions for the accompanying actuator,
positioner and additional accessories.
Only trained or experienced personnel should carry
out the operation and installation of all pressure equipment. If you have any questions regarding the equipment, contact your Jordan Valve Controls representative.
InstallatIon
Exceeding the recommended pressure and temperature limits from Table 1, or those indicated on
the nameplates of your Control Valve, can result in
personal injury and property damage. Jordan Valve
recommends the installation of a relief valve to protect
against overpressure situations.
Mark DBAQ Series are designed to meet specific
conditions for fluid control, temperature, pressure and
pressure drop. The limiting factor on these valves can
be the body/trim material combinations. Do not install
these valves in any other applications without first consulting with your Jordan Valve representative.
1. Inspect the valves for shipping damage and
foreign debris while uncrating.
2. Ensure the pipeline is free from welding slag,
chips and other debris by blowing out the line
before installation.
3. Position the valve on the line so the flow direc tion indicator corresponds to the direction of
the flow of the pipeline.
4. Jordan Valve recommends the installation of
a standard three-valve maintenance bypass.
This will allow the isolation of the control valve
without shutting down the pipeline system.
Installation & Maintenance Instructions for the
Mark DBAQ Angle Style Control Valves
5. Install approved gaskets between the valve
body and the pipeline flanges.
6. If the actuator has been shipped separately,
refer to the mounting procedure in the appli cable instruction manual.
7. If the valve body arrives without packing
installed in the packing box, it will be neces sary to install the packing before putting the
valve into service. To complete these proce dures, follow the instructions under packing
maintenance in this manual.
8. *Note: It may be necessary to adjust the pack ing to prevent leakage. Prior to shipping the
packing was tightened, and may require some
adjustment for specific conditions.
MaIntenance
Internal valve components are subject to normal
deterioration and must be inspected and replaced
as required. The necessity of inspections and
replacement of parts will depend on the severity of
service conditions. Inspections and maintenance must
be carried out on a regularly scheduled basis.
To ensure the safety of personnel and to protect
against property damage, the following steps should
be carried out before beginning disassembly.
1. To prevent the valve from opening suddenly,
disconnect any operating lines to the actuator.
This would include air pressure, electrical
power or control signal lines.
2. Isolate the valve by using the bypass valve, or
by shutting down the process completely.
Relieve the pressure and drain the process
fluid from both sides of the valve.
3. Relieve the pressure contained in the actuator
by venting the actuator loading pressure
and relieving any power actuator
spring compression.
Mark DBaQ SerieS angle Style Control ValVeS
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 500oF (260oC). To
add lubricant to the packing box, turn the capscrew in a
clockwise direction.
Lubricator
Lubricator/ Isolating Valve
Figure 1: Lubricator and Lubricator Isolating Valve
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.
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.
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Mark DBaQ SerieS angle Style Control ValVeS
Table 1: Recommended Torque for Packing Flange Nuts
Stem Diameter Valve Class
Inch mm Min Max Min Max
1/2 12.7 1500 11 16 15 22
3/4 19.1 1500 25 37 34 50
1 25.4 1500 38 57 52 77
1-1/4 31.8 1500 50 75 68 102
Rating
2500 13 18 18 24
2500 30 45 41 61
2500 45 67 61 91
2500 60 90 81 122
Adding Packing Rings
When using packing with lantern ring it may be possible
to add packing rings above the lantern ring as a
temporary measure without removing the actuator from
the valve body.
1. Isolate the control valve from the line pressure
and release the pressure from the valve body.
2. Remove the packing flange nuts (key 18, Figure
7) and lift the packing flange (key 16), upper
wiper (key 20) and packing follower (key
21, Figure 7) away from the valve body.
3. Take care when removing out the old packing
rings to avoid scratching the valve plug
stem or packing wall. Clean all
metal parts to remove debris that
would prevent the packing from sealing properly.
4. Should split ring packing be added, spread the
rings over the stem and slide the rings into
the packing box. Alternate the position
of the splits to avoid creating a leak
path. If solid ring packing is being
added, remove the stem connector and
slip the rings over the end of the valve stem.
5. Re-assemble the packing follower, upper wiper,
packing flange, and packing flange nuts. (keys
21, 20, 16, and 18).
Lbf•Ft N•M
Replacing Packing
Prior to beginning any maintenance, it is important to
isolate the valve from the line pressure, and to release
all pressure from the valve body. Disconnect all operating lines to the actuator, including air pressure, electrical power or control signal lines. The process pressure
should be released both upstream and downstream of
the valve. Drain the process fluid from both sides of the
valve.
Employ lockout procedures to ensure the safety of personnel and equipment during the valve service.
NOTE: Extreme caution must be used during the disassembly. Nicks and scratches will affect the ability
to seal the valve in the future.
1. Remove the capscrews in the stem connector
and separate the two halves. Exhaust all actua-
tor pressure if any was applied, and discon-
nect the actuator supply and leak off piping.
2. Remove the yoke locknut, and remove the
actuator from the bonnet (key 2).
3. Loosen the packing flange nuts (key 18), and
remove any travel indicator parts and stem
locknuts from the valve stem threads
6. Reconnect the body actuator stem connection
according to the appropriate manual. Torque
accordingly, reference Table 3.
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