Jordan Valve Mark DBAQ Series Angle Style Control Valve - Manual

I
ntroductIon
Contained in this manual are installation instructions,
maintenance and parts information for the Mark DBAQ
Series Control Valves. Refer to the appropriate manu-
als 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 equip-
ment. If you have any questions regarding the equip-
ment, contact your Jordan Valve Controls representa-
tive.
I
nstallatIon
Exceeding the recommended pressure and tem-
perature 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 con-
sulting 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.
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.
M
aIntenance
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.
I & M Mark DBAQ Series
Installation & Maintenance Instructions for the
Mark DBAQ Angle Style Control Valves
3170 Wasson Road • Cincinnati, OH 45209
Phone 513.533.5600 • Fax 513.871.0105 (f)
[email protected] • www.jordanvalve.com
Warning: Jordan Valve Control Valves must only be used, installed and repaired in accordance with these Installa-
tion & 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 disassem-
bling a valve, be sure to release all spring tension.