DP Pumps Hydro-Unit Premium, Инструкция по установке и эксплуатации

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Fig. 20: Removing the body
7. Remove the body of the non-return valve.
8. Remove the insert check valve including O-rings.
9. Remove excessive contamination or deposits with a clean cloth.
10.Re-insert the insert check valve into the body. Apply lubricant to new O-rings. See table
below.
Fig. 21: Mounting the body
11.Mount the body of the non-return valve.
Fig. 22: Loosening the screwed connection of the body parts
12.Use a suitable tool to loosen the screwed connection of the body parts of the non-return
valve to extend the body length.