PROFACTOR 3/4" PF FS 238.20 Технический паспорт онлайн [10/18] 867271

Profactor Armaturen GmbH

Adolf-Kolping-Str. 16, 80336 München, Germany, Telefon: +49 89 21546092

E-mail: info@pf-armaturen.de, Internet: www.profactor.de

7. OPERATION AND MAINTENANCE INDICATIONS

The ﬁlter should not be exposed to direct sunlight, UV radiation, heat sources above 65°С,

solvent vapors, oils, alkaline washing solutions, any chemical substances.

Avoid contact with oils and grease with the plastic parts of the ﬁlter. The noticeable pressure

decrease at the ﬁlter, which is determined by the pressure gauge readings, may indicate that

the ﬁlter element needs to be replaced. With water a closed water takeoff tap, the pressure

gauge shows an input pressure in the system.

When opening a water takeoff tap with a clean ﬁlter, the pressure gauge readings will

decrease by Δp value. In the course of the ﬁlter operation time, this value will grow. The two-

fold increase of Δp is indicative of the fact that the ﬁlter is contaminated and must be cleaned.

Both ﬁlter washing or ﬁltering element cleaning options are acceptable. Washing may be

performed in two methods:

A) – closing the ﬁlter outlet tap

– opening a washing valve and draining the sediments to the sewage. In this case, the

ﬁltering element itself is not cleaned, only the sediments deposited on the bowl bottom are

removed.

B) – closing the water takeoff tap

– closing ﬁlter inlet and outlet taps

– opening the washing valve

– opening the ﬁlter outlet tap. Furthermore, the residual water in the

pipeline downstream the ﬁlter will partially remove the particles deposited on the ﬁltering

element.

C) Backwashing of the ﬁlter (possible only if the bypass is provided):

– closing the water takeoff tap

– closing the ﬁlter inlet tap

– opening the ﬁlter outlet tap and bypass tap

– opening the washing valve. This allows cleaning the ﬁltering element.

The ﬁlter washing methods: