Aqua Environment Inc 873H-400 Operação e manutenção

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drw 875-400 1/89, 1/98, 990804,010619,020507; 090805PS; 090910PS; 090917ps

OPERATION AND MAINTENANCE

MODEL 873H-400 REGULATOR

The model 873H is similar to the standard 873 series

but employs a heting manifold at the base of the

regulator. Flowing warm water or other fluid through

the manifold reduces the possibility of freezing within

the regulator casused by cold moist gas. The model

873 is a piston type hand loading regulator. It utilizes a

balanced poppet design for high flow and minimum

effect of inlet pressure on outlet pressure.

poppet assembly is contained in a cartridge with

internal filtration for easy in-field changing. The

regulator is self venting but is optionally available

without the vent.

SPECIFICATIONS

• Maximum inlet pressure

MPa)

• Outlet pressure

• Flow coefficient (C v )

(equivalent to 0.23" orifice)

• Rise of outlet pressure with

drop of inlet pressure

• Materials - body and cap -

internals -

seals, -

• Fittings

• Size

INSTALLATION

Use a suitable pipe thread sealant such as 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. The inlet is on the left when facing

the adjusting knob with the two gage ports upward.

An optional panel mounting nut is available (part no.

952). This nut permits mounting the regulator using a

1.25" hole in a panel or plate.

shipped oxygen clean and should NOT be used for

oxygen service as provided. Consult the factory for

details on oxygen service. The 1/2" port is the outlet.

The 1/4" port adjacent to the 1/2" port is the outlet

gauge port. The other two 1/4" ports are the inlet and

inlet gauge ports. Either of these ports can be used

as the inlet. Connect the inlet to the source gas such

as a high pressure storage tank. The outlet is capable

of being adjusted from 0 to 400 PSI. AN OUTLET

GUAGE AND RELIEF VALVE SET NO HIGHER THAN

400 PSI SHOULD BE CONNECTED TO THE

OUTLET. A 1/2" NPT SIZE RELIEF VALVE SHOULD

BE USED FOR FULL PROTECTION. IF THE INLET

PRESSURE CAN EXCEED 6000 PSI A RELIEF

VALVE SHOULD ALSO BE INSTALLED AT THE

INLET TO PREVENT EXCEEDING 6000 PSI.

AQUA ENVIRONMENT CO,. INC.

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

OPERATION

drawing) to the desired value as read on the outlet

gauge. When reducing the pressure the regulator

will self vent via the vent hole near the cap. This is

normal.

pressure to below the new setting then increase

The

pressure to the new setting. If in-field adjustment is

to be avoided, the knob 10 can be replaced by a

bolt and lock nut. A 3/8" by 24 thread per inch bolt

with a minimum thread length if one inch is required.

MAINTANENCE & REPAIR

CAUTION

6000

PSI

(40

particulates or moisture

0 to400 PSI

internal filter or valve seat.This can occur when up-

0.8

stream dryers are not changed or remain unused for

long periods

accumulate. In critical applications where it is

important not to lose flow, a larger particulate filter

10 PSI/1000 PSI

should be used upstream. Also an orifice such as

aluminum

the Aqua model 796 should be used downstream.

brass,stainless,

This reduces the tendency to freeze when moisture

KEL-F, Viton

is present. Consult factory for details.

1/4" FNPT inlet

should establish

1/2" FNPT outlet

valve cartridge, filter and upstream dryers based on

3" dia x 6" lg

experience

representation is made herein as to time intervals as

each use is unique. Back-up systems should be

used in very critical

maintenance is hard to insure.

cartridge 895 is a factory assembled item and

should

disassembled unless absolutely necessary. Spare

cartridges are available at a nominal cost and should

be kept on hand if rapid repairs are required. IN ALL

The regulator is NOT

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.

regulator vent, allow the inlet and outlet pressure to

equalize by shutting off the inlet.

continues after the inlet and outlet equalize the

vent seat 5 or piston seal 14 are leaking. Replace

these. If leakage stops when the inlet and outlet

pressure equalize the poppet cartridge item 1 is

leaking. Replace this.

Outlet pressure is adjusted by knob 10 (refer to

When reducing set pressure reduce

As with any regulator or valve,

allowing

time intervals for changing the

and

service

replaced

If leakage occurs through the regulator or out the

can plug or freeze the

corossion

materials

The user

conditions.

applications

since

field

The poppet

required

and

not

If leakage