Viking F-1 Manuel de service télécharger pdf (Page 8)

TECHNICAL DATA

March 28, 2013

Dry 120h

DRY VALVE

MODEL F-1

The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058

Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com

System pressure when the dry valve operated.

Elapsed time from opening of the test valve to development of full flow of water from the system test connection.

Any other information required by the Authority Having Jurisdiction.

6. Verify that alarms operate properly.

7. Allow water to flow from the system test connection until it appears clear and clean.

8. When test is complete, close the water supply main control valve.

9. Perform steps 1 through 20 of section 4-B PLACING DRY VALVE IN SERVICE.

10. Verify that the water supply main control valve is open, and all other valves are in their normal operating position. If equipped

with an external anti-flood device, the ½” anti-flood isolation valve must be OPEN and secured.

B. Partial Flow Trip Test

1. Notify the Authority Having Jurisdiction and those in the area affected by the test.

NOTE: VIKING CONVENTIONAL TRIM PROVIDES A CONNECTION FOR INSTALLATION OF A NON-INTERRUPTIBLE PRES-

SURE SWITCH. ALARMS AND ELECTRIC PANELS CONTROLLED BY AN ALARM PRESSURE SWITCH INSTALLED IN THE

“ELECTRIC ALARM PANEL CONNECTION” CANNOT BE INTERRUPTED (SEE DRY VALVE TRIM CHART).

2. Record water supply pressure and system pneumatic pressure.

3. Fully open the main drain (located on the base of the dry valve) to flush away any accumulation of foreign material.

4. CLOSE the water supply main control valve as far as possible while maintaining full flow from the main drain. CLOSE the

main drain.

5. Open the priming level test valve to simulate operation of the system.

6. Note (for records) water supply pressure and system pneumatic pressure when the dry valve operates.

7. CLOSE the water supply main control valve and OPEN the main drain IMMEDIATELY when test is complete.

8. Perform steps 1 through 20 of paragraph 4-B PLACING DRY VALVE IN SERVICE.

9. Verify that the water supply main control valve is open, all other valves are in their normal operating position. If equipped

with an external anti-flood device, the ½” anti-flood isolation valve must be OPEN and secured.

III. MAINTENANCE (See Figure 3)

WARNING: PRIOR TO SERVICING INTERNAL OPERATING PARTS OF THE DRY VALVE, TAKE THE FOLLOWING PRECAU-

TIONS.

1. Close the water supply main control valve, placing the system out of service.

2. Open the main drain located in the base of the dry valve.

3. Close the air (or nitrogen) supply to the dry system piping.

4. Relieve all pressure from the dry system piping. If the system has operated, open all auxiliary drains and the system test

valve to allow the system to drain completely.

5. Use dry valve reset bar/wrench part number 02977BM to loosen and remove hand-hole cover bolts (21) and remove hand-dry valve reset bar/wrench part number 02977BM to loosen and remove hand-hole cover bolts (21) and remove hand-to loosen and remove hand-hole cover bolts (21) and remove hand-

hole cover (24).

CAUTION: CLAPPER ARM ASSEMBLY (8) AND CLAPPER ASSEMBLY (5) IS SPRING LOADED TO OPEN. NEVER PLACE

HANDS INSIDE THE DRY VALVE IF THE CLAPPER ASSEMBLY IS LATCHED CLOSED.

6. Release latched (set) clapper assembly for service:

Insert the re-setting tool through the hole in hook assembly (15), across the cast fulcrum on top of clapper arm assembly

(8) until the re-setting tool contacts the stopping boss on top of clapper arm assembly (8).

Apply a downward force on the end (outside the valve) of the re-setting tool. Hook assembly (15) will slide toward the

hand-hole and off clapper arm assembly (8). The clapper arm assembly (8) and clapper assembly (5) will forcefully open,

impact against latch (2), and be trapped in the open position.

CAUTION: NEVER APPLY ANY LUBRICANT TO SEATS, GASKETS, OR ANY INTERNAL OPERATING PARTS OF THE DRY

VALVE. PETROLEUM-BASED GREASE OR OIL WILL DAMAGE RUBBER COMPONENTS AND MAY PREVENT PROPER OP-

ERATION OF THE DRY VALVE.

Recommended practice: When performing maintenance inside the dry valve with the clapper in the open position, cover the opening

to prevent tools or parts from dropping onto the seat or into the waterway.

7. To Remove Clapper Rubber (19):

Use a 9/16” wrench to remove hex-head screw (17) and rubber retainer (18).

Remove the clapper rubber (19) for inspection. If the clapper rubber shows signs of wear, such as cracking, cuts, or

excessively deep grooves where the rubber contacts the air or water seat, replace the rubber.

8. To Re-install Clapper Rubber (19):

Place a new clapper rubber (19), over the center hub of rubber retainer (18).

Position retainer (18) (with rubber in place) against clapper assembly (5) as shown in figure 2.

1 2 3 4 5 6 7 8 9 10 11 12

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Viking F-1 Manuel de service Page 8

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