AccuStream AccuValve On/Off Valve Manuel - Page 9

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AccuStream Cutting Systems

3. Align the bottom of the seal weep hole with the top of the mounting collar. Carefully thread

and tighten the inlet fitting into the side of the valve body.

NOTE: Make sure that the mating cones are properly aligned before torquing the connection.

4. Connect the inlet water connection to the inlet adapter. This connection is normally made with

¼" OD x .083 ID 60,000 psi rated stainless steel tubing. Tighten all high-pressure connections

with a two wrench technique.

5. Connect regulated air pressure to the valve actuator.

6. Set the air pressure to 70 psi. The valve actuator should be controlled with a 3-way solenoid

valve. When the solenoid valve is energized, the actuator will pressurize and the actuator

should exhaust when the solenoid valve is de-energized.

NOTE: When installing a new valve it is best to flush the lines at low pressure with the adapter

and seat out of the valve body. This step is optional.

7. Put AccuGoop at the seat hole and on the mating surfaces. With water pressure off, turn on the

actuator. This removes spring force from the needle.

8. Thread the adapter with the seat on top into the valve body. Tighten the adapter to the valve

body with two wrenches.

9. Turn the actuator off, this will seat the needle into the seat.

10. Turn on the pump or open up the manual isolation valve to apply high-pressure water to the

valve.

11. Flush the lines by actuating the on/off valve with brief pulses. After five to ten pulses, the lines

should be flushed and free of contamination.

The cutting head can now be installed onto the adapter. See the Accustream cutting head manual.

4.3 Valve Body Maintenance

The valve consists of two parts; the actuator and the high-pressure valve area. The actuator can go for

extended periods without service. The high-pressure valve components require service more frequently.

Valve Body Components

The needle, needle bearing, valve seal, and seat are the working parts of the high-

pressure valve. These parts can be replaced either as a kit or individually as l

occur.

The AccuStream ON/OFF valve repair kit #11328 should contain the following

parts.

11010-SEAT, 11562-NEEDLE, 11043-VALVE SEAL, 12178-NEEDLE

GUIDE.

When to Install New Valve Components

•

Replace the needle and seat when the nozzle tip is dripping.

•

Install a new seal when the top weep hole in the valve body is dripping.

•

Replace the Needle Guide when the fit between the guide and needle is

loose. A worn guide ID may cause seals to fail due to ID extrusion.

*Dripping from the inlet water connection usually indicates that the connection is not tight enough.

13084 ON/OFF VALVE & CUTTING HEAD MANUAL

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