Operating Principle; Recommended Installation; Start-Up; Troubleshooting - Patterson-Kelley P-K COMPACT Operating And Maintenance Instructions Manual

The Kombat K1 & K4 Valves are flow to open, globe style,
pneumatic diaphragm control valves. The pneumatic actuator
can be arranged to operate with either air to close or air to open
SPENCE
STEAM
TRAP
SPENCE Y
STRAINER
CAUTION!
The piping system must be adequately designed and supported
to prevent extraordinary loads to the pressure equipment.
Locate the valve in a straight run of horizontal pipe as shown in
Figure 1. The valve should be mounted with the actuator in the
upright position. Allow room for removal of the actuator. Prevent
pipeline hammering in compressible fluid service by providing
proper drainage before and after the valve. Avoid damaging
effects of scale and dirt in pipelines by using a strainer. A 3-
Flush piping system thoroughly to clear it of welding beads,
scale, sand, etc. Install valve with the arrow on the side of the
valve body pointing in the direction of fluid flow. Install controller
and accessories in accordance with instructions furnished by
the manufacturer of these items. Connect necessary air lines
and/or electrical connections to diaphragm chamber and valve
mounted accessories. Use 1/4" O.D. tubing for all air lines. If
For troubleshooting of the controlling device and accessories,
see instruction furnished by manufacturer of these items. To
troubleshoot valve and actuator, check for the following: change
in operating conditions; pneumatic signal failure; diaphragm

OPERATING PRINCIPLE

RECOMMENDED INSTALLATION

SPENCE
UNIFLEX
UNION
SPENCE K1 & K4
CONTROL VALVE
FIGURE 1 - Typical Steam Installation
INSTALLATION

START-UP

TROUBLESHOOTING

control. A controller sensing the controlled variable provides a
signal to the actuator of the control valve to obtain the desired
control.
SPENCE
UNIFLEX
UNION
SPENCE
STEAM TRAP
valve by-pass to facilitate inspection and maintenance without
interrupting service is recommended. To eliminate excessive
noise with steam and other compressible fluids, enlarge the
delivery pipe size to effect a reasonable flow velocity at the
reduced pressure. A concentric transition is recommended. If
possible, avoid sharp turns close to the valve bullheaded tee
connections to a low pressure main. Install initial and delivery
pressure gauges to indicate performance. If the rating of the
delivery system or connected equipment is less than the initial
pressure, provide a safety relief valve.
length of the air line exceeds 25 ft, use 3/8" O.D. tubing.
Insulation, if desired, may be applied to the valve body only. Do
not insulate bonnet. Caution: Hazardous fluids may be handled
by this valve. Only qualified personnel, who are familiar with your
installation, should be permitted to install, readjust, inspect or
maintain the valve.
failure; foreign matter lodged between seat ring and plug;
actuator vent plug may be: plugged, missing, replaced with a
solid plug; packing leakage.
2
SPENCE SAFETY
RELIEF VALVE
SPENCE DRIP
PAN ELBOW
SPENCE
STEAM TRAP