Atlantic Boilers RS TURBOFLOW DN 50 S160+ Betriebs- und Wartungshandbuch - Seite 12

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Descaling

• Use a nitric acid (HNO3) or citric acid

solution: 1.5% concentration by weight, max.

temperature 65°C (1.5% by weight corresponds

to 1.75 l of 62% HNO3 for 100 litres of water) or

a polyphosphate solution (NaPO4 or Na3PO4):

1.5% max. concentration by weight, max.

temperature 50°C.

Degreasing

• Degrease stainless steel or titanium plates

with a sodium hydroxide (NaOH) solution: 1.5%

max. concentration by weight, max. temperature

65°C (1.5% by weight corresponds to 3.75 l of

30% NaOH for 100 litres of water).

• Do not use hydrochloric acid or water with

a chloride content of over 300 ppm to clean

stainless steel plates.

• Do not use phosphoric acid to clean titanium

plates.

Deposits:

Calcium

Recommended detergents: 4% nitric acid

solution at 60°C max. - 4% citric acid solution at

60°C max.

Oils and greases

Recommended detergents: paraffin or kerosene

(as these fluids may damage NBR and EPDM

gaskets, limit the contact time to no more than

30 minutes)

Sludges, metal oxides

Recommended detergents: 8% nitric acid

solution at 60°C max. - 4% citric acid solution at

60°C max.

Organic matter

Recommended detergents: 2% sodium hydroxide

solution at 40°C max.

5.6 - Liquid penetrant testing

• Corrosion, galvanic coupling and erosion

can create holes in the plates. As such damage

is not always visible to the naked eye, we

recommend performing liquid Atlantic tests

to check for holes or microcracks. Atlantic

technical support team can advise you on the

appropriate products.

ATLANTIC BOILERS, PO BOX 11, ASHTON UNDER LYNE, OL6 7TR T: 0161 621 5960 E: [email protected] www.atlanticboilers.com

5.7 - Gasket replacement

• Before starting, check the manufacturing date

of the gaskets, printed on the relevant date stamp

5.7 - Gasket replacement

(Fig.5). Please note that the gaskets must not be

• Before starting, check the manufacturing date o

stored for more than 6-12 months (see chapter 2 -

kets, printed on the relevant date stamp (Fig.5). P

STORAGE).

that the gaskets must not be stored for more

months (see chapter 2 - STORAGE).

• Remove the old gasket without using cut-

• Remove the old gasket without using cutting tools,

ting tools, which could irreparably dam-

which could irreparably damage the plate.

age the plate.

• Make sure that the plate and gasket are

thoroughly clean and dry alongside the

• Make sure that the plate and gasket are

gasket slot.

thoroughly clean and dry alongside the gasket slot.

5.7.1 - Plug-In® Design gaskets

• Press the gasket onto the plate (Fig. 6), making

5.7.1 - Plug-In® Design gaskets

the leak detector vents, "A", are facing up and

the Plug-In® tabs are hooked into their respecti

• Press the gasket onto the plate (Fig. 6), making

(Fig.7). Make sure that the gasket is properly se

sure that the leak detector vents, "A", are facing up

notch, then turn the plate over to check again t

and check that the Plug-In® tabs are hooked into

Plug-In® tabs are correctly in place.

their respective notches (Fig.7). Make sure that the

5.7.2 - Plug-In® Design gaskets which may requi

gasket is properly seated in its notch, then turn the

plate over to check again that all the Plug-In® tabs

• Plug-In® Design gaskets, for initial plates, interme

ing plates (for multi-pass heat exchangers only

are correctly in place.

plates, may require a limited use of glue. Thes

plates, complete with gaskets mounted at the fa

5.7.2 - Plug-In® Design gaskets

be supplied as spare parts. Alternatively, for the

tion of the gaskets, proceed as described below.

may require the use of glue

• Plug-In® Design gaskets, for initial plates,

intermediate turning plates (for multi-pass heat

exchangers only) and final plates, may require

a limited use of glue. These types of plates,

complete with gaskets mounted at the factory, can

be supplied as spare parts. Alternatively, for the

substruction

of the gaskets, proceed as described below.

A: Leak detector vents are notches in the surfaces of

the gasket sections around the portholes which vent

any leaks to the atmosphere so that they can be

detected.

of glue

which