Alfa Laval Spiral Heat Exchanger SHE LTL 2L

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

Retighten hookbolt assemblies in a diagonally opposite sequence

Is the cooler media admitted to the SHE first?

Is the fluid nearest ambient temperature admitted first if media are below ambient temperature?

Were pumps started against closed valves?

Is all pipework and the SHE filled before opening the valves fully?

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 temperature do not attain ambient temperature while containing fluid against closed valves

Arrange working fluid pipework system for continuous venting

If shut-down period is short and SHE is not to be opened, ensure SHE remains full

If risk of corrosion exists, flush, clean, and drain the unit

If risk of freezing exists or unit is to be opened, flush with water and drain

If returning to manufacturer, drain process fluids, flush with water or cleaning agent, and redrain

Verify cover placement and orientation

Ensure gasket and cover compatibility

Select appropriate gasket material

Apply hookbolts and finger-tighten

Tighten hookbolts diagonally using recommended torque

Enter the actual working pressure (psig)

Calculate and enter the torque based on actual working pressure

Examine channels for the following issues

Is an optical device needed for inspection?

Is there any massive corrosion or erosion evident?

Is there any mechanical damage suspected?

Contact Alfa Laval for advice regarding possible field repair if necessary.