Val-matic Wastewater Air/Vacuum Valve Manuel d'utilisateur télécharger pdf (Page 4)

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MAINTENANCE

The Wastewater Air/Vacuum Valve should be

scheduled for inspection and backwash on a

regular basis. The use of Fusion Bonded Epoxy

(FBE) interior coating greatly minimizes the

need for backwashing. Based on experience in

service, a more frequent backwash regimen may

be desirable to minimize leakage.

INSPECTION: Periodic inspection to verify

operation can be performed. The valve should

not leak fluid at any connection or through the

outlet. If there is leakage through the outlet,

perform a backwash procedure on the valve.

LUBRICATION: The Wastewater Air/Vacuum

valve is a self-contained automatic valve and

does not require lubrication to enhance its

operation.

TOOLS: No special tools are needed to

maintain or repair the valve. The valve should

be equipped with backwash valves and hoses

for ease of backwashing.

BACKWASH PROCEDURE: In order to

properly backwash the valve, a 1” clean water

supply of at least 30 psi is needed. This supply

should be connected to the top of the valve with

the rubber hose with quick disconnect couplings

as provided and shown in Figure 4. NOTE:

quick disconnect hose fittings provided with

valve are “Air King” rated for 110 psi from Dixon

Valve, Chestertown, MD.

1. Pipe valve B to drain prior to

backwashing.

2. Close inlet valve A.

3. Open valve B.

4. Connect water supply C, open valve D,

and supply water for three minutes to

flush seat and mechanism area. Close

valves D and B. This will wash the body

area.

5. Additional washing of seat area can be

accomplished by placing the water

supply over the discharge port with

valve C closed.

6. Slowly open valve A to place unit back

in service.

Figure 4. Backwash Piping

WARNING: Wear safety glasses to

look into the valve outlet

after installation.

Released fluid can cause

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