Aqua Environment Inc 504H Owner's Operation And Maintenance Manual

Browse online or download pdf Owner's Operation And Maintenance Manual for Control Unit Aqua Environment Inc 504H. Aqua Environment Inc 504H 2 pages. Relief valve

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OPERATION AND MAINTENANCE

MODEL 504 & 504H RELIEF VALVE

The model 504 is an economical, small, high pressure

relief valve having excellent set pressure control over

a large pressure range to 6000 PSI. (6500 PSI for the

504H model) It stays bubble tight to within a few PSI

of set pressure and reseats bubble tight even after

many vent cycles. Safety wire holes are provided for

optional locking of set pressure adjustment.

SPECIFICATIONS

• Set pressure -------------

• Leakage -------------------

• Max. flow (air) ------------

• Equivalent orifice --------

• Fluids -----------------------

• Inlet -------------------------

• Outlet -----------------------

• Size -------------------------

• Temperatures ------------

• Materials ------------------

INSTALLATION

Use pipe thread sealant Teflon tape on inlet and

outlet threads.

Avoid over torquing pipe thread.

Normal torque applied with a 6 or 8 inch long wrench is

ample. Use ample Teflon tape - 3 or 4 turns, not 1 or 2

turns. It is important to maintain piping internals free of

particulates such as metal chips, dirt, weld slag, etc. If

present these will tend to lodge in the relief valve

when it opens causing damage to the seat and

leakage. Since it is difficult to keep piping completely

clean during assembly it is advisable to blow high

velocity air through the system and out the relief valve

port just prior to installing it. This can normally clean

the system of particulates. A high pressure air tank

can provide a strong flow for this cleaning operation.

Suitable ear and eye protection should be used when

flowing high pressure air. It is NOT advisable to install

any type of filter before the relief valve. A filter could

become clogged disabling the safety function of the

relief.

AQUA ENVIRONMENT INC.

3100 Kerner Blvd. Unit N, San Rafael, CA 94901 (415) 453 8157

6/89, 11/15/96, 001217; 061128; 070708;090805PS; 130802

adj. 900 to

6000 PSI (6500 PSI

for 504H)

bubble tight

100 SCFM at

3000 PSI

50 SCFM at

1500 PSI

.078 inch dia.

gas or liquid

1/4" male NPT

side vent

7/8" hex by 2.1"

long

-40F to 160F

bronze,

anodized

aluminum, &

Viton

The relief can be either set prior to installing in the

system or after. Set the relief above set pressure

using the adjusting screw (item 6 in the drawing).

Bring system pressure up to desired relief valve

pressure then back off the adjusting screw until the

relief valve vents. Use the locking nut (item 7) to

lock the position of the set screw. Cycle pressure

once or twice to insure the relief opens at the

desired pressure. Safety wire holes are provided in

the body and adjusting screw.

NOT shipped oxygen clean and should NOT be

used for oxygen service as provided. Consult the

factory for details on oxygen service.

MAINTENANCE & REPAIR

Routine maintenance is generally not required. As

mentioned above, the relief is sensitive to solid

particles flowing through it. As with any relief valve,

these particulates tend to lodge on the sealing

surfaces or damage the sealing surfaces as they

pass through. The result is leakage after the valve

reseats.

In the event of leakage, the valve can be repaired as

follows. (Refer to the drawing on the opposite side

of this sheet.) Remove adjusting screw 6, spring 8,

spring guide 5, and poppet 4. Inspect the sealing

edge of the poppet 4 for scratches and seal surface

9 for imbedded particles. A 5X or 10X magnifier is

helpful for this inspection.

problem will be imbedded particles in the seal.

These can be removed with a Q tip, or tooth pick. If

this does not correct the problem the seal 9 and

possibly the poppet 4 will need to be replaced. To

replace the seal 9, remove poppet guide 3 using a

large screwdriver. If a new seal is not available the

old seal can be turned over and reinstalled. This

exposes a fresh sealing surface. The seal is a 90

durometer (extra hard) size 2-006 O ring. These are

readily available. When installing the seal insure

washer 6 is installed under the seal as shown.

Insure the seal and washer stay in place until the

guide 4 is installed. Torque guide 4 about as tight

as possible while holding the relief valve body - i.e.

without using a wrench on the body.

IN ALL CASES THE UNIT CAN BE RETURNED TO

THE FACTORY OR DEALER FOR REPAIR UNDER

WARRANTY IF APPLICABLE OR AT A NOMINAL

CHARGE. Maintenance or repairs should only be

done by qualified personnel in a clean environment

by following the drawings and parts lists herein.

Drw 933

The regulator is

In most cases the