Sahara Sahara-Pak HC-1260, Инструкция по эксплуатации

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INSTRUCTION MANUAL
Model HC
Reference 219 Rev 2
Page 18 of 46 06/20/2013
2.0.1 General Information (continued)
In the interest of further development, Henderson Engineering Co., Inc.,
reserves the right to make changes at any time, which, in keeping with
the essential characteristics of the dryer described here, may be
necessary for increasing efficiency or for reasons relating to safety or to
normal business practice.
2.0.2 Description
The Sahara-Pak HC dryer is a complete system consisting of the
following major components:
2.0.2.1 Drying Vessels (insulation optional)
Two ASME Code stamped vessels containing Activated
Alumina desiccant (refer to the Specifications in Section 5 for
quantity) are firmly mounted on a structural steel base. Each
vessel is provided with stainless steel desiccant retaining
screens at both inlet and outlet. Separate desiccant fill and
drain connections allow for fast and easy desiccant
replacement without disturbing process piping. A safety relief
valve is installed on each vessel.
2.0.2.2 Switching Valves
Main compressed air flow through the Sahara-Pak HC dryer is
controlled by reinforced teflon-seated high performance
butterfly valves (3" and larger). Two inch and smaller are
standard 2-way rack and pinion operated ball valves. This
improved 2-way valve design provides for lower overall system
pressure drop than multi-port valve designs. It also eliminates
undesirable heat transfer between compressed air streams
simultaneously flowing through the same valve internal plug,
rotor, or ball.
The valves are opened and closed by over-sized actuators.
These actuators are driven by well-filtered, cool, dry air
supplied by the control air filter. The coalescing quality filter
element contained therein removes all particulates above 0.3
micron in size; thereby assuring long pneumatic actuator life.
Control air lines need no lubricators, as the pneumatic
actuators have been permanently pre-lubricated.
Speed control valves are provided, to slow the closing of all
tower switching valves to prevent upstream compressor dead-
heading.