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OPERAT
OR’S MANUAL
2752X–X
RELEASED:
1
1–13–74
REVISED: 1
1–8–96
(REV.D)
INCLUDING: OPERATION, INSTALLATION & MAINTENANCE
FLUID REGULATOR
READ THIS MANUAL CAREFULL
Y BEFORE INST
ALLING,
OPERA
TING OR SER
VICING THIS EQUIPMENT
.
E1994
THE ARO CORPORA
TION
D PRINTED IN U.S.A.
%
(419) 636–4242
D
F
AX (419) 636–21
15
THE ARO CORPORA
TION
D
ONE ARO CENTER
D
BR
Y
AN, OHIO 43506–0151
PAGE1OF4
FIGURE 1
STANDARD
CAP
ACITY
ST
AINLESS STEEL
DOWNSTREAM TYPE
MAXIMUM INLET PRESSURE 750 PSI (51.7 BAR)
1/4” INLET/OUTLET
THIS MANUAL COVERS THE FOLLOWING MODELS
5–125 PSI WORKING
RANGE
0–50 PSI WORKING
RANGE
10–250 PSI WORKING
RANGE
0–30 PSI WORKING
RANGE
27520–000 27520–100 27520–200 27520–400
27521–000 27521–100 27521–200 27521–400
27522–000 27522–100 27522–200
27521–300
SERVICE KITS
Use only genuine ARO replacement parts to assure compatible presĆ
sure rating.
OPERATION
To adjust back pressure, turn Y23-72-B screw clockwise with
Y106-105 allen wrench which is furnishedwith unit. TodecreasepresĆ
sure, turnY23-72-B screw counterclockwise. (Doesnot apply toModĆ
el 27521-300.) To adjust pressure on Model 27521-300, regulate air
pressure to back side of diaphragms using auxiliary port on 104135
cap.
SERVICE HINTS
• If outlet pressure rises or creeps, check (D) seat assembly and (F)
ball for foreign material. If (D) seat assembly and (F)ball appear to
be worn or eroded, they should be replaced. (See Figure 2)
• If material is leaking through bleed hole in 29919 housing and nut
assembly, replace 29000 and 90860 diaphragms. (Does not apply
to Model 27521-300.