Emerson VA001-102-01, VA001-102-02 Service And Adjustment
RAP R11: Low Pressure Air Relay Valve Service and Adjustment
ARV-VA001-102-00
05/05/11
Low Pressure Diaphragm-Operated Air
Relay Valve
Service and Adjustment for VA001-102-01 & VA001-102-02
RAP R11: Low Pressure Air Relay Valve Service and Adjustment
ARV-VA001-102-00
05/05/11
Air Relay Valve
Figure 1: Air Relay Valve with 1-1/4 Diaphragm
Adjusting Cap (3)
Locknut (4)
Spring Retainer (2)
Body (1)
Diaphragm Cylinder Assembly (9)
A. Disassemble and Clean
Information enclosed in brackets (item 1 etc.) is in reference to the complete assembly
drawings on page 6 and the illustrations throughout the document.
1. Remove spring retainer (item 2), adjusting cap (item 3) and locknut (item 4), by
unscrewing as a unit, from the body (item 1) and set aside.
2. Remove diaphragm cylinder assembly (item 9), by unscrewing as a unit, from the
body (item 1) and set aside.
3. Slowly pull valve stem (item 7) out of body (item 1) and set aside on a clean surface.
4. Carefully remove end valve sleeves (item 6) and center valve sleeve (item 5).
Note how they go together.
5. Clean stem (item 7) with a soft
cloth, Do Not scratch the stem.
Clean the end sleeves (item 6) and
center sleeve (item 5).
6. Lubricate and install new outer oring (item 10) and install new inner
o-ring (item 11), without lube, on
one end sleeve (item 6). From the
spring retainer end, fit the end
sleeve into the bore of the body
with the o-rings toward the spring
retainer threads. Insert the sleeve
until the outer o-ring is about to
enter the bore. (See Figure 2.)
Figure 2: Placing End Sleeve Seals
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RAP R11: Low Pressure Air Relay Valve Service and Adjustment
ARV-VA001-102-00
05/05/11
Air Relay Valve
7. Install the spring retainer (item 2),
adjusting cap (item 3) and locknut
(item 4), as a unit. As you thread
the spring retainer in, it will push
the o-ring and sleeve into the bore
to the correct position. Tighten
spring retainer hand tight. (See
Figure 3)
Figure 3: Installing Spring Retainer
8. Turn the valve body (item 1) so
that the open end of the bore is up.
Install new inner o-rings (item 11),
without lube, in the center sleeve
(item 5). Place new lubricated oring (item 10) in the bore of the
body (item 1) on top of the end
sleeve (item 6). (See Figure 4)
9. Carefully slide the center sleeve
(item 5) into the bore in of the
body. When it reaches the outer oring (item 10), lying on the end
sleeve (item 6), press the center
sleeve to seat the o-ring. (See
Figure 5)
Figure 4: Placing Center Sleeve
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