DUKER 451 사용 설명서 - 페이지 12

{카테고리_이름} DUKER 451에 대한 사용 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. DUKER 451 19 페이지. Resilient seated butterfly valves

9 Troubleshooting

Leakage at a connection to the pipeline:



Tighten the flange screws.



If leakage continues: Repair necessary.

Leakage at disc:



Check if valve is 100% closed. If so, check if the valve has been closed with the required torque.



If leakage persists, open / close the valve several times under pressure.



If the valve continues to leak, repair is necessary. Change the rubber seal.



Request replacement parts and instructions from Düker.

Further Hints:



Spare parts are to be ordered with all information of the marking on the valve. Only DÜKER original

parts may be installed.



If it is determined after removal that the housing and / or internal parts are not sufficiently resistant to

the medium, the manufacturer DÜKER should be contacted.

Dysfunction:



Remove and inspect the fitting. If the valve is damaged: Repair is necessary. Request replacement

parts and required instructions from DÜKER.

The valve is sealed by O-rings. Before the blind pin or the connecting ring on the valve is loos-

ened, the pressure in the pipeline must be completely reduced. When replacing wearing parts

(e.g. profile seal or O-rings), the line should be completely emptied. When disassembling the

capital 2 safety instructions must be strictly observed.

Please note that Düker GmbH assumes no liability for damage and malfunctions resulting from

non-compliance with the operating instructions.

Issue 04

Düker GmbH – www.dueker.de

page 12