installation &
operating instructions
Design Envelope 4302 ivs and 4382 ivs vertical
in-line pumping unit with integrated controls
8
note:
Ensure the isolated pump is not operating before attempting
to release the locking mechanism. Failure to do so may result
in injury to the operator and/or damage to the pump.
Unlocking
1 Open the interconnecting valve on the seal fl ushline to
pressurize the serviced pump and vent air through bleeder
valve on series 4302 and 4382. Close these valves once the
pressure is equalized and air removed.
2 Loosen set screw (11) and lower locking handle (3) to the
horizontal position, secure with set screw (11).
3 Rotate valve to center position so that the center pin of
the locking arm (4) locates in the recess on the locking
handle (3).
4 Loosen set screw (11) and raise locking arm (3) to the
vertical position, locking the center pin in the locking arm
recess, secure with set screw (11).
suction valve
Manual operation
The suction side valve is designed for use as a manually
operated isolation valve. This valve is not designed to
automatically pivot as the discharge fl appers do.
warning:
Care should be taken when performing
procedures (3) and (4) below. Read the
following instructions carefully.
Locking
1 Loosen suction side set screw (11) to release the locking
handle (3).
2 Rotate the suction side locking handle (3) so that the
handle points towards the pump to be serviced and secure
in the horizontal position, using set screw (11). This releases
the suction locking arm (4).
3 Rotate the suction valve towards the pump to be isolated.
The orientation of the shaft is indicated by the center pin
on the locking arm (4).
4 Loosen set screw (11) and raise the locking handle (3) s o
that the cam on the base on the handle forces the pin of
the locking arm (4) towards the pump to be isolated. The
locking handle (3) should be raised to between 45 degrees
and the vertical position.
This handle should not be rotated past the vertical position.
5 Tighten set screw (11) to secure the locking handle (3)
in position
note:
The locking handle (3) should only be rotated towards the
pump stopped for service. The dualarm suction valve is
designed to prevent the locking handle (1) from rotating to-
wards the running pump, as the suction of the running pump
could cause the valve to slam shut with su cient force to
injure the operator and/or cause damage to the pump. Do
not attempt to circumvent this safety feature.
warning:
Care should be taken when performing
procedures (3) and (4) below. Read the
following instructions carefully.
Unlocking
1 Open the interconnecting valve on the seal fl ushline to
pressurize the serviced pump and vent air through bleeder
valve on series 4302 and 4382. Close these valves once the
pressure is equalized and air removed.
2 Loosen set screw (11) and lower locking handle (3) to the
horizontal position, secure with set screw (11).
3 Rotate valve to center position so that the center pin of
the locking arm (4) is located in the recess on the locking
handle (3).
4 Loosen set screw (11) and raise locking arm (3) to the
vertical position, locking the center pin in the locking
arm recess, secure with set screw.
note:
Keep hands and tools away from suction valve locking arm
when freed by locking handle as di erential pressure may
cause arm to rotate quickly with force when unlocked.
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