DeZurik APCO AVV-150 사용 설명서 - 페이지 5
{카테고리_이름} DeZurik APCO AVV-150에 대한 사용 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. DeZurik APCO AVV-150 13 페이지. Air/vacuum valve with optional csv surge check valve
페이지 인쇄
APCO AVV 140/150 Air/Vacuum Valve with Optional CSV
Fusion/Powder Coated Valves
Valves with fusion/powder coated exterior paint require flat washers to be
installed under the flange nuts when installing the valve to the pipeline flange to
prevent the paint from cracking or chipping.
Maintenance
The APCO AVV-140/150 Air/Vacuum Valve with Optional CSV Surge Check Valve is automatic in
operation and requires very little maintenance. It should always be installed in a vertical position.
A semi-annual visual inspection for leakage is recommended. A malfunction of the Air/Vacuum Valve
can be identified by the seepage of water through the exhaust port, while malfunction of the Surge
Check Valve would be a substantial amount of spillage through the Air/Vacuum exhaust port during
pump start-up. Should a malfunction occur, the following steps should be taken to repair the valve:
Disassembly Procedure
Air/Vacuum Valve 1-20" (25-500mm) Only
See Figures 1-2 for part identification.
For information regarding 24" (600mm) Air/Vacuum Valves, contact your local DeZURIK sales
representative.
Servicing the Air/Vacuum Valve while the pipeline is under pressure can cause personal
injury or equipment damage. Relieve pipeline pressure or shut off isolation valve before
servicing the Air/Vacuum Valve.
1. Relieve pipeline pressure or shut off isolation valve at inlet to Surge Check Valve before
servicing the Air Valve.
Do not completely remove pipe plug or cover bolts while the valve is under pressure.
2. Slowly remove pipe plug near inlet of valve body (A1) to relieve internal pressure and to drain
the unit.
3. Check to see if foreign matter or dirt is preventing float (A14) from seating properly against
seat (A6). Clean as necessary.
4. Perform a seat test. Replace pipe plug and slowly fill valve chamber by cracking open
isolation valve on inlet pipe. If seepage persists, repeat Steps 1 and 2 and proceed as
follows:
5. Remove cover bolts (A4) and cover (A2).
6. Remove seat screws (A16/A34) and lift out seat (A6) from cover (A2).
June 2019
Page 5
DeZURIK
Surge Check Valve
D12021