4
2000 Series
Figure 3.
Type 2050 Three-way Valve
Valve Body (Figure 4)
1. Place the 2000 Series Temperature Regulator in
the direction of the arrow cast on the valve body
so that the heating or cooling media will flow
through it.
2. Place strainer and steam trap ahead of the valve
to protect the valve from the damaging effects of
dirt, scale, foreign material and condensate.
3.
Place a manual shut off valve before and after
the valve.
4.
Place a bypass line with a manual shut off valve
around the valve for manual operation if the
valve is out of service. Additional recommended
installation diagrams can be found in the Spence
Designer’s Guide.
5. To avoid stresses on the valve or unions, cut the
connecting pipes to the exact length required and
should be in correct alignment.
6. To connect the valve, remove the union ends from
the valve body and attach them to the nipples on
each side of the valve.
7. When tightening the unions to the valve always
use two wrenches.“Never use the valve frame for
leverage.” The valve should be installed in the
vertical position with the thermal assembly on top.
Bulb
The location of the bulb should be chosen carefully so
that the temperature of the media around the bulb or
well will be representative of the entire body of fluid
being heated or cooled.
Note
For all applications where the bulb
is mounted in the horizontal position
the red dot on the bulb must be facing
upward. When large volumes of oil are
being heated it may be necessary to
place the bulb near the heating coils to
avoid dangerous hot spots which would
result if the bulb was remote for the
heating coils.
Plain bulbs (standard for 2000 Series), without a union
bushing, are used in open tanks, ovens, drying, rooms,
kilns, etc. Install the bulb vertically, pointing downward
and held securely by suitable straps and clamps. If
the application requires that the bulb be held in a
horizontal position, the free end of the bulb must not
be higher than the fixed end, and the red dot on the
bulb must be upward.
INLET
(1)
INLET
(2)
INLET
OUTLET
(3)
OUTLET
(4)
OUTLET
(5)
MIXING
DIVERTING
1.
Cold fluid inlet opens with increase in temperature rise
2.
Hot fluid inlet closes with increase in temperature rise
3.
Mixed fluid
4. Opens with increase in temperature rise
5. Closes with increase in temperature rise
