Technical data

TECHNICAL DATA
March 28, 2013
Dry 120d
DRY VALVE
MODEL F-1
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: [phone] Technical Services: 877-384-5464 Fax: [phone] Email: [e-mail]
ate Viking E-1 Accelerator Trim Chart provided with the Accelerator Trim Package and the Viking Engineering and Design
Data book.
When a Viking accelerator is installed on the Model F-1 Dry Valve, the dry system air supply must be connected as
shown on the Model E-1 Accelerator Trim Chart.
The Viking external anti-flood device is required when a Viking Model E-1 Accelerator is installed on a dry valve accord-
ing to the Model E-1 Accelerator Trim Chart.
Hydrostatic Test:
CAUTION: THE DRY VALVE CLAPPER MUST BE LATCHED OPEN DURING PERFORMANCE OF THE HYDROSTATIC TEST
(SEE FIG. 2-A)
DO NOT perform a 200 PSI (13.8 bar) hydrostatic system test with the dry valve clapper in the closed (set) position (see Fig. 2-C).
Never exceed 60 PSI (4.1 bar) air pressure in the system piping with the dry valve clapper closed.
DO NOT expose the Viking accelerator to the hydrostatic test. For warnings and considerations regarding hydrostatic testing of the
Viking accelerator and other system components, refer to Technical Data for the equipment used.
B. Placing the Valve in Service (Refer to Figure 2)
When the dry pipe system is ready to be placed in service, verify that all equipment is adequately heated and protected to
prevent freezing and physical damage.
1. Verify that the water supply main control valve supplying the dry valve is closed.
2. Open the main drain valve (located on the inlet of the dry valve).
3. Drain all water from the dry pipe system. If the system has operated, or if water has entered the system, open all auxiliary
drains and the system test valve. Allow enough time to completely drain the system. Perform steps 4 through 10 to set the
dry valve and/or inspect the internal operating parts of the dry valve.
4. Verify that the dry pipe system is not pressurized.
5. Use the dry valve reset bar/wrench, part number 02977BM, to loosen and remove hand-hole cover bolts (21). Remove
hand-hole cover (24).
CAUTION: CLAPPER ARM ASSEMBLY (8) AND CLAPPER ASSEMBLY (5) ARE SPRING LOADED TO OPEN. NEVER PLACE
HANDS INSIDE THE DRY VALVE IF THE CLAPPER ASSEMBLY IS LATCHED CLOSED.
To release a latched clapper assembly for service:
Insert the re-setting tool through the hole-in-hook assembly (15), across the fulcrum cast on top of clapper arm assembly
(8) until the re-setting tool contacts the stopping boss on top of clapper arm assembly (8) (see Figure 3).
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). Clapper arm assembly (8) and clapper assembly (5) will forcefully open,
impact against the latch (2), and latch in the open position.
NOTE: INSPECTION AND CLEANING PROCEDURE STEP 6 BELOW IS CONSIDERED PART OF THE ANNUAL TRIP TEST.
6. Inspect and clean the internal parts of the valve. Give special consideration to the water seat (16), air seat (20) and clapper
rubber (19). Wipe away all contaminants, dirt, and mineral deposits. DO NOT use solvents or abrasives. Operate all parts
to test freedom of movement. Renew or replace damaged or worn parts as required.
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.
7. To set the dry valve clapper (refer to Figures 2 and 3):
Raise the latch (2) to release spring-loaded clapper arm assembly (8) from the latched open position.
Move the clapper arm assembly (8) down toward the horizontal position (see Figure 2-B).
While holding spring loaded clapper arm assembly (8) down, insert the re-setting tool through the hole-in-hook assembly
(15), across the fulcrum cast on top of clapper arm assembly (8) until the re-setting tool contacts the stopping boss as
shown in Figure 2-C.
Apply a sharp upward force at the end of the re-setting tool. Hook assembly (15) will slide forward on the re-setting bar
and latch the clapper closed with a positive setting action (see Figure 2-C).
8. Priming water is not required and may not be desirable where clean, good-quality fresh water is not available. If priming
water is desired, fill the dry valve with water to the bottom of the hand-hole.
Verify that the intermediate chamber of the dry valve is free of water. No water should flow from the drip check when
the plunger is pushed.
9. Visually inspect hand-hole cover gasket (25). Verify that it is in good condition.
10. Re-install hand-hole cover (24), gasket (25), and hand-hole cover bolts (21). Tighten the bolts using the dry valve reset
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