Hale MG - Manual (Page 33)

Muscle Pumps
1-26
Drain Valves
There are two types of drain valves available from
Hale. They are either the sliding plug type (HD,
DV5) or a screw knob style (DV7).
The sliding plug type valves have a pull handle
mounted on the operator’s panel. Pulling the
handle out opens the valve allowing the component
to drain. The Model DV5 has connections for up to
five drain lines. When the DV5 is either open or
closed, the possibility for “cross talk” exists. This
drain valve cannot be used with either relief valves
or other pilot pressure valves. The screw knob
style drain valve (DV7) has facilities to connect up
to seven individual drain lines. Each connection to
the DV7 is individual and the possibility for “cross
talk” does not exist. The control knob is located on
the operator’s panel. Turning the control knob
counterclockwise will open the drain valve.
Anodes
The Hale Anode System helps prevent damage
caused by galvanic corrosion within the pump.
Galvanic action pits the pump and pump shaft
material through the electrolysis of water in the
pump. The popularity of non-corrosive water tanks
and piping has increased the incidences of this type
of corrosion in today’s fire pumps. The Hale
Anode System provides a sacrificial metal, which
helps to diminish or prevent pump and pump shaft
galvanic corrosion. The Hale Anode will fit on any
Hale truck mounted pump, regardless of age or
model. It is designed to be easily installed
requiring just four bolts and a gasket. Total time to
install is just fifteen minutes, yet it will provide
years of protection for your pump. The Anode kit
(figure 1-26) is designed for installation in the
standard Hale 115 series flange openings. On
fabricated manifolds and similar applications, the
installer is to provide 1-1/4 NPT openings and
install anodes directly. It is recommended that one
anode is installed on the suction side and one is
installed on the discharge side. Anodes can be
mounted in any position (horizontal or vertical).
Figure 1-26.
PUMP BODY, SUCTION TUBE, ETC.
HALE 115 SERIES FLANGE
HALE 115 SERIES FLANGE GASKET
ZINC ANODE
Hale Anti-Corrosion Anode