Honeywell MP953B, Руководство по установке и обслуживанию

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REPRAIR AND ADJUSTMENT FOR HONEYWELL
OR MP-953P PNEUMATIC OPERATORS USED ON ARMSTRONG HUHIDIFIERS
REPLACING STEM SEALS
There are stem seals in the bonnet assembly to prevent steam
leaks around the stem.
The following steps should be
followed if these seals need to be replaced.
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a.
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Remove the pneumatic operator in accordance with
Section I.
Remove the bonnet assembly (15) from the humidifier
cap.
Remove the yoke assembly
stem adapter and
stem nut (17) from the stem (16).
Remove the packing gland (18) from the bonnet (15).
Push down the valve stem then press it back into
place.
Repeat if necessary to loosen the seals (20)
and spacer (19).
Remove the seals (20) and spacer (19).
With the stem (16) in the bonnet
place two new
seals (20) with the spacer (19) between them, onto the
stem.
The open end of BOTH seals (with spring showing)
should be toward the valve.
Carefully guide the seals into place in the bonnet
(15).
Slide the packing gland (18) over the stem and
turn it into the bonnet. Tighten the packing gland
securely.
Turn the bonnet assembly (15) into the humidifier cap,
and tighten securely.
Install the pneumatic operator in accordance with
Section II.
CHANGING OPERATOR
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a.
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10.
Remove the pneumatic operator in accordance with
Section I.
Remove the six cover screws (31) from the operator
cover (33).
Lift the cover (33) from the frame (29).
Remove the hex nut (34) and washer (32) from the
support (24).
Remove the follower (38) and diaphragm (21) from the
frame (29).
operator and remove the screws (25) from the
base (26).
Remove the base (26).
Carefully remove the cup (28) and support (24) -- avoid
damaging the rolling seal (22).
Remove the old spring (30) and replace it with the new
one.
Insert the support (24) through the center of the cup
and place the support and cup into the operator
frame. Attach the rolling seal and press the
support back into place.
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