B-320-2-E
33
9.3.2 Single-case Construction Meter Body Assembly Procedure
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SERVICE NOTE BEFORE ASSEMBLY
◆
Oval rotors, inner walls of the rotor shafts, inner wall of the measuring chamber, inlet and
outlet ports, and inner surface of the front cover should be thoroughly washed clean,
completely removing dust.
(3) Front Cover Installation
Firstly install O-Ring (103) on the front cover. If
the O-Ring is damaged or swollen with metered
liquid, it will not fit in the groove. If such is the
case, replace with a new one.
Align the locating pins of front cover with its
pin slots in the meter body and, fitting the rotor
shafts into rotor shaft sockets in the front cover,
force the meter body until the locating pins fit
firmly into the pin slots in the meter body without
slanting the front cover. Install 12 hex bolts (M16)
and tighten them evenly until the front cover is
closely in contact with the meter body.
PIN SLOTS
PINS
HEX BOLTS
O-RING
(4) Confirming Smooth Rotation
With air or water, make sure to see that the
rotors move freely.
CAUTION
Rotation check should be performed at
low rotor r.p.m.
Violent rotor spinning may cause a
damage to the components, and bearing
burn.
CAUTION:
This meter is not compatible with any other registers. Never attempt to replace it.
(1) Rotor Installation
Rotor installation is correct if the side where
signal generating magnets are embedded faces
the register (top of the measuring chamber) and
the side with match marks ( • )( •• ) faces the
front cover.
Carefully install the rotors with the 1st rotor
(match mark "•") on the shaft with "1" stamped
on the outside of measuring chamber and the
2nd rotor (match mark "••") on the shaft with "2"
stamped. Ensure that the match marks are as
shown in the inset.
2ND ROTOR
MATCH MARK
FLOW
DIRECTION
IN
OUT
1ST ROTOR SIGNAL MAGNET
(2) Make sure of the smooth rotation and correct
engagement of the rotors by rotating them with
hand.
