Velocity Edge GX325 Manual de usuario descargar pdf (Pagina 44)

When a SUPERCHANGER plate and frame heat exchanger is

to be placed in storage for six months or longer, the procedures

listed below must be followed:

1. If the unit has been recently shipped from our factory and

is unused, disregard steps 2, 3 and 4; follow steps 5 through

10.

2. If the unit has been used and long-term storage is required,

it must be completely drained. Prior to draining remove the

optional shroud, if provided, and let the unit cool to ambient

temperature. Units with plate packs arranged with one pass

on each side (all nozzles on the stationary end frame) are

self-draining. Simply vent at the upper nozzle location and

drain from the lower nozzle for each side individually. A two

pass/two pass or one pass/two pass plate arrangement is also

self-draining, provided all two pass side nozzles are at the

lower elevations (numbers S2, S3, M2 and M3). Other units

may be self-draining if they have been ﬁtted with separate

drain and vent nozzles, or with vents and drain holes. Units

that are not self draining must have the plate pack completely

loosened to drain all liquids. Before opening the plate pack,

wipe off the exterior surfaces to make sure no ﬂuids or debris

fall onto the plate pack.

3. Open the plate pack and thoroughly clean the unit internally

and externally. Dry the unit. (Blowing dry, hot air at

approximately 150°F on all areas is an excellent method.)

4. Install blind ﬂanges with gaskets on all nozzles. Plug all

other openings.

5. Coat all unpainted carbon steel component surfaces with

light grease, SAE 30 oil or other rust inhibiting products.

6. Coat all bolt threads with light grease.

7. Loosening of the plate pack is not recommended. However,

it is advisable that to avoid any compression set of the

gaskets, the plate pack length dimension be adjusted.

This should be greater than the unit’s stated minimum

tightening dimension (T.D.).

8. Protect the unit from direct sunlight, intense heat radiation

or ultraviolet radiation by loosely covering the unit with an

opaque, reﬂecting type plastic ﬁlm or similar material. Make

sure air is allowed to circulate around the unit.

9. It is preferable to store the unit indoors, well protected from

the weather. The temperature in the storage area should

ideally be 60°F to 70°F with a relative humidity of 70%

or lower.

10. All potential sources of Ozone, such as operating electric

motors or welding equipment, should be removed from the

storage area to preclude Ozone attack on gaskets. Gaskets

should not be exposed to direct sunlight (ultraviolet

radiation) and should be stored in dark plastic bags. Under

proper storage conditions, gaskets generally have a shelf life

of approximately four years.

STORAGE PROCEDURES

CAUTION: Never store the unit in an area where the

temperature is at 32°F or lower.

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Velocity Edge GX325 Manual de usuario Pagina 44

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