Alfa Laval Spiral Heat Exchanger SHE LTL 8S

Ensure the following before opening a Type I or III unit

Disassemble hookbolts and remove covers

Dismantle the flanged joint for the cooling water outlet on Type IIIV upper cover

Check for damage when removing residual gasket material

Securely hold the unit in place to prevent swinging

Securely fasten hinged covers at piping connections and mounting brackets before opening

Select the cleaning method used

Ensure pipework is provided with valved branches for cleaning agents circulation

Are the cleaning agents compatible with the materials of construction?

Specify the proprietary cleaning agents used and their manufacturers' instructions

Provide detailed information on the nature of the fouling/scaling and the serial number of the unit for specific cleaning instructions

Flush the unit completely of all cleaning agents

Is the unit drained if not put back into operation immediately?

Retighten hookbolt assemblies in a diagonally opposite sequence

Check recommended torque values in the reassembly section

Admit the cooler of the two media to the SHE first

Is the fluid nearest ambient temperature admitted first?

Start-up carried out smoothly and slowly

Start pumps against closed valves

Ensure all pipework and the SHE are filled before opening valves fully

Examine channels for the following issues

Is an optical device needed for inspection due to large channel width and small spacings?

Is there any massive corrosion or erosion evident?

Is there any mechanical damage suspected?

Describe any detected issues in detail

Contact Alfa Laval for advice regarding possible field repair if massive corrosion, erosion, or mechanical damage is evident or suspected.

Allow medium with inlet temperature nearest ambient to circulate after other medium is turned off

Reduce all flow rates slowly to avoid hydraulic and thermal shock

Ensure units with fluids having normal boiling point below ambient do not attain ambient temperature while containing fluid against closed valves

Arrange working fluid pipework system for continuous venting

Is the shut-down period short and the SHE not to be opened?

If leaving SHE full of stationary liquid involves risk for corrosion, perform the following

If risk for freezing exists or if the unit is to be opened, perform the following

If returning the unit to the manufacturer, perform the following