Wilkerson P17 - Manual (Page 2)

High Precision Regulator IS-2R205
Operation
1. Before turning on the air supply, turn the adjusting knob
counterclockwise until compression is released from the control
spring. Then turn on air supply and adjust regulator to desired
secondary pressure by turning adjusting knob clockwise. This
permits pressure to build up slowly, preventing any unexpected
operation of the valve, cylinders, tools, etc., attached to the
line. Adjustment to desired secondary pressure can be made
only with primary pressure applied to the regulator.
2. To decrease regulator pressure setting, always reset from a
pressure lower than the final setting desired. For example,
lowering the secondary pressure from 5.5 to 4.1 bar (80 to
60 PSIG) is best accomplished by dropping the secondary
pressure to 3.5 kPa (50 PSIG), then adjusting upward to 4.1
bar (60 PSIG).
Figure 1
CAUTION
REGULATOR PRESSURE ADJUSTMENT - The working range of
the knob adjustment is designed to permit outlet pressures within
their full range. Pressure adjustment beyond this range is also
possible because the knob is not a limiting device. This is a
common characteristic of most industrial regulators, and limiting
devices may be obtained only by special design.
Service: (Always vent all air pressure
before servicing)
1. Turn the control knob (A) fully counterclockwise. Remove
upstream air supply.
2. Remove four screws (B) holding the bonnet (A) in place.
Remove bonnet assembly, gasket (C), balance control assembly
(D), spring (E), protector diaphragm (F), diaphragm housing
(G), and control diaphragm (H). Discard gasket (C), protector
diaphragm (F), and control diaphragm (H).
3. Remove bleed screw (M) and discard.
4. Remove spring retainer (L) and spring (K).
5. Clean all retained parts with mild soap and water.
6. Install spring (K) and spring retainer (L) into body making sure
that the spring is installed correctly, see Fig. 1. Tighten spring
retainer 2.6 to 3.1 Nm (23 to 27 in-lbs).
!
IN OUT
A
C*
B
M*
D
E
F*
G
H*
J
L
K
}
}
}
}
* Parts in Service Kit
Figure 2
7. Place the new control diaphragm (H) onto the body (K). Put
diaphragm housing (G) on next followed by the new protector
diaphragm (F) and spring (E). Put balance control assembly
(D) on next then the new gasket (C) followed by bonnet
assembly (A) and reassemble the four screws (B). Tighten
screws 3.2 to 3.6 Nm (28 to 32 in-lbs) in progressive steps
using a crisscross pattern.
8. Install new bleed screw (M). Tighten screw 1.5 to 1.9 Nm (13
to 17 in-lbs) in progressive steps using a crisscross pattern.
9. Admit inlet pressure and turn the adjusting knob (A) to obtain
the desired pressure.
NOTE:A slight flow of air through the bonnet vent hole is necessary
for proper operation of the regulator.