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Installation
(CONTINUED)
Valves are precision manufactured items and as such, should not be subjected to misuse such
as careless handling, allowing dirt to enter the valve through the end ports, lack of cleaning
both valve and system before operation and excessive force fitting and operation. All special
packaging material must be removed.
Immediately prior to valve installation, the pipework to which the valve is to be fastened should
be checked for cleanliness and freedom from debris.
The valve ends are threaded parallel therefore the valve must be fully tightened up to the body
shoulder. Sealing compounds appropriate to the application may be used and a sealing washer
on the body shoulder will provide additional security. The spanner must only be located on the
valve hexagon at the threaded end to avoid distortion of the valve.
After installation, the valve may be opened and closed fully to confirm satisfactory operation.
Sealing compounds may be used but excessive use of hemp type materials should be avoided,
which increases the thread interference and may cause overstressing.
Operating
Fig.370
Open the valve by anti-clockwise rotation of the stem using a suitable spanner or key until a
positive stop is felt. No further effort is necessary.
To close the valve, rotate the stem clockwise until a positive stop is felt.
Note:
The operator should use suitable hand protection at extreme temperature conditions.
Fig.371
Open the valve by anti-clockwise rotation of the stem using a suitable lockshield key until a
positive stop is felt.
Key Refs:
½" valve (Fig.391 Ref 2), ¾" valve (Fig.391 Ref 3) and 1" valve (Fig.393 Ref 6).
No further effort is necessary.
To close the valve, rotate the stem clockwise until a positive stop is felt.
Note:
The operator should use suitable hand protection at extreme temperature conditions.
Maintenance
The valve should be at zero pressure and ambient temperature prior to any maintenance.
Maintenance Engineers and Operators are reminded to use correct fitting tools and equipment.
A full risk assessment and methodology statement must be compiled prior to any maintenance.
The risk assessment must take into account the possibility of the limits of use being exceeded
Installation and Operating Instructions
Installation and Operating Instructions
Hattersley Bronze Draining Tap – Fig.370 & Fig.371
2
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