2
PENBERTHY
SERIES K3 GAGECOCKS
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
2 INTRODUCTION
2.1 Features and specifications
Penberthy Series K3 tubular glass gagecocks
are supplied in pairs (upper and lower)
and are designed to house each end of a
transparent sight glass tube. This gagecock/
glass combination forms a gage that accurately
indicates liquid level as well as liquid
characteristics.
Standard features of K3 gagecocks in non
steam-water applications are: a ball check
shut-off to stop leakage of contained fluid in
case of accidental gage glass breakage, integral
bonnet, integral drain cock and handwheel.
Series K3 gagecocks are not suitable for
steam-water applications unless they are
furnished with one of the following optional
features:
1. Non-automatic gagecocks – ball checks
removed from both upper and lower
gagecocks.
2. Automatic gagecocks – vertical ring ball
check and ball inspection plug in the lower
gagecock. The upper gagecock is equipped
with a horizontal ball check and a leaky ball
seat formed in the body.
CAUTION
Failure to follow any instruction could possibly
result in a malfunction of the gagecock with
resulting sudden release of pressure, property
damage or physical injury.
Safety instructions
Emerson does not have any control over the
manner in which its gagecock set is handled,
installed, or used and Emerson cannot and does
not warrant or guarantee that a gagecock set is
suitable for or compatible with the user's specific
application.
1 ABOUT THE MANUAL
This manual has been prepared as an aid and
guide for personnel involved installation or
maintenance. All instructions must be read and
understood thoroughly before attempting any
installation, operation or maintenance.
Safety instructions
Under most circumstances, Series K3
gagecocks are not recommended without a
ball check shut-off. Gagecocks without the ball
check shut-off feature will not stop leakage of
contained fluid in the event of accidental tubular
glass breakage. However, in circumstances
where the fluid being gaged tends to surge in a
rapid manner, the ball checks could tend to give
a false level reading or seat accidentally.
2.2 Design ratings at maximum and minimum
operating temperatures (see Table 1)
To determine the maximum allowable working
pressure for a specific temperature within the
design limits stated below, the user should
refer to relevant technical data sheets or, when
provided, the specifically stated design limits on
a product proposal.
CAUTION
Under no circumstances should K3 gagecocks be
used for steam-water applications unless they are
equipped with one of these optional features. Use
of standard K3 gagecocks without these features
may result in sudden release of pressure, leakage
of contained fluid, property damage or physical
injury.
TABLE 1 - DESIGN RATINGS
Material
Model
Maximum allowable working pressure
Maximum steam pressure
Bronze
K3A
225 psig [1.55 MPa] at -20°F [-29°C] to +100°F [38°C]
150 psig [1.03 MPa] at 500°F [260°]
175psig [1.21 MPa]
K3B
500 psig [3.45 MPa] at -20°F [-29°C] to +100°F [38°C]
300 psig [2.07 MPa] at 550°F [288°C]
360 psig [2.48 MPa]
Pressure/temperature ranges in above table are subject to the limitations of the tubular glass.
See Table 2.
2.3 Application data
Note:
for specific application data, within the
above ranges, the user should consult the
product proposal for the specific model and
size gagecock set or should request the supply
of the applicable technical data sheet.
WARNING
Under no circumstances should these design
ratings or application data be exceeded.
Exceeding design ratings or application data may
cause severe physical injury or property damage.
