Jordan Valve Mark 128PQC Series Control Valve - Manual

I
nstallatIon
Warning:
Service conditions must not exceed the limits shown
on the valve nameplate, or those outlined in this
manual. Consequences could include bursting of
pressure-retaining parts and uncontrolled process
fluid, resulting in personal injury or property damage.
Control valves should also be protected from external
damages.
Prior to installing the Mark 128PQC Series Control
Valve, perform a complete inspection for damage,
and remove any foreign debris. Position the valve for
desired flow direction. If angle flow is required, switch
the pipe plug to left-hand connection. (Figure 2)
The versatility of this valve allows for installation in any
orientation, with the standard method being with the
actuator above the body. Standard orientation is best
when an angle body or angle configuration has been
specified.
When installing the valve into the line, accepted piping
practices must be used. A three-valve bypass should
be used if continuous operation is required during
inspection or maintenance.
For a fail-close control valve, connect the input signal
line into the 1/4-inch NPT actuator connection (Figure
1) in the lower diaphragm case assembly. The input
signal pressure line should be installed in the upper
diaphragm case assembly of a fail-open control valve.
Mark 128PQC Control Valve with Fail-Close Action
Figure 1: Mark 128PQC Control Valve Typical Constructions
Detail of Mark 128PQC
Exterior
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.
3170 Wasson Road • Cincinnati, OH 45209
Phone 513.533.5600 • Fax 513.871.0105 (f)
[email protected] • www.jordanvalve.com Installation & Maintenance Instructions for the
Mark128PQC Series Control Valves
I & M Mark 128PQC Series
1/4 INCH NPT
PRESSURE
CONNECTION
LEAKOFF
VENTS
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3 35
21
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