Masoneilan 33000 Series Butterfly Valves Instruction Manual | 13
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13. Setting Procedure
Sealing Components
A. Over-close the valve by means of Actuator operation
or equivalent mechanism (Gear Box, Lever etc.) by
approximately;
•
3 to 4 degrees - 3 Inch to 6 Inch
•
2 to 3 degrees - 8 Inch to 10 Inch
•
1 to 2 degrees - 12 Inch to 24 Inch
Note: This will elevate the Seat Retainer slightly and should
be repeated 3 or 4 times to ensure mating alignment of Disc
Seat (B138) and Seat Ring (B102).
B. The Seat Ring Bolting (B913b) shall be tightened to half the
required torque (ref. Table-3) in the sequence shown
C. Flip the valve and tighten the Disc Bolting (B913) to the
required torque (ref. Table-1)
D. Return the valve to original position and tighten the Seat
Ring Bolting (B913b) to the required torque (ref. Table-3) in
the sequence indicated.
E. Open the valve slightly and re-torque in the required
sequence (This may need to be repeated 2 or 3 times due
to compression of the seat ring laminate.
F. The Bearing(B011) qty. may differ as there are Single
bearing and two bearing constructions. Check the Parts list
and respective assembly drawing for the quantity of bearing.
14. Protection, Storage and
Handling
Butterfly valves have been tested and adjusted at the factory prior
to shipment. The period between leaving the manufacturing plant
to installation may involve substantial exposure to degradation
due to impact, impingement or corrosion.
Such degradation can adversely affect the performance of valves
when in service and can easily be avoided if simple guidelines
are followed.
A. Protection
As a minimum all Masoneilan Valve Butterfly valves are
dried, coated and fitted with protective measures, such as
valve end port protection and waterproof wrapping prior to
shipment. Larger valves may have their own shipment cases.
This protection should be left in place until immediately
before the valve is to be fitted into the pipe.
B. Storage
Valves are often stored at site for an extended period before
they are actually installed. Storage should be in the original
delivery crates with any waterproof lining and or desiccant
remaining in place.
To avoid the possibility of any deterioration, storage should
be off the ground in a clean, dry, indoor environment. If the
storage period extends over six months, any desiccant bags
supplied in the original packaging should be replaced.
C. Handling
Appropriate care when handling valves should be given,
roughness in handling may damage end connections or
valve parts. Care should be taken to avoid damage to any
protection. Valves that require handling by mechanical
means should be slung or rigged carefully to avoid damage
to exposed valve parts. It is critical that the lifting of the valve
assembly is not at the actuator but at the valve itself.
D. Transportation
Where able, the valve Disc Seat must be ‘cracked off’ the
Body Seal during transportation. This is to prevent the
possibility of damage to the sealing components through
impact.
