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Hattersley 370, 371 Installation And Operating Instructions Manual

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Installation and Operating Instructions
Bronze Draining Tap
Fig.370 & Fig.371
CE Marking and the Pressure Equipment Directive 97/23/EC
This has been implemented in United Kingdom law by the Pressure Equipment Regulations 1999 (SI 1999/2001).
Categories I, II, III or IV carry the CE mark and require a Declaration of Conformity (Note: all valves up to and including 25mm (1") having a maximum allowable pressure greater than 0.5 bar are designated SEP regardless of fluid group.)
Product Life Cycle
The life of the valve is dependent on its application, frequency of use and freedom from misuse. The system into which it is installed must also be compatible with respect to the fluid being transported with reference to its temperature, pressure and other properties, which may cause premature failure or non-operability.
A well designed system will take into consideration all the factors considered in the valve design, but additionally electrolytic interaction between dissimilar metals in the valve and the system must be examined. Before commissioning a system, it should be flushed to eliminate debris and chemically cleaned as appropriate to eliminate contamination, all of which will prolong the life of the valve.
Limits of Use
Operating Pressures and Temperatures
The valve to which these installation, operation and maintenance instructions apply have been categorised in accordance with the Pressure Equipment Directive.
The fluid to be transported is limited to Group 2 liquids i.e. non-hazardous and on no account must these valves be used on any Group 2 gases, Group 1 liquids or Group 1 gases.
Fig.370 and Fig.371 Bronze Drain Taps in sizes up to and including 1 inch are categorised as SEP and do not require the CE mark.
Not suitable for fatigue loading, creep conditions, fire testing, fire hazard environment, corrosive or erosive service, transporting fluids with abrasive solids.
Pressure/Temperature Rating
Valves must be installed in a piping system whose normal pressure and temperature do not exceed the above ratings.
The maximum allowable pressure in valves as specified in the standards is for non-shock conditions. Water hammer and impact for example, should be avoided. If the limits of use specified in these instructions are exceeded or if the valve is used on applications for which it was not designed, a potential hazard could result.
Layout and Siting
It should be considered at the design stage where valves will be located to give access for operation, maintenance or repair.
These drain taps may be installed in any orientation but attention should be paid to surrounding structures, ensuring that the hose may be easily connected and that the valve operation is not impaired.
Installation
Prior to installation, a check of the body marking must be made to ensure that the correct valve is being installed.
PN Non-shock pressure at
temperature range
Non-shock pressure at max temperature
16
16 bar from -10°C to 120°C 16 bar at 120°C
Hattersley Bronze Draining Tap – Fig.370 & Fig.3711
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
Hattersley Bronze Draining Tap – Fig.370 & Fig.371 2
Installation and Operating Instructions
www.cranebsu.com
H_370_371_0118
IOM_004BR0370D799_V2
Every effort has been made to ensure that the information contained in this publication is accurate at the time of publishing. Crane Ltd assumes no responsibility or liability for typographical errors or omissions or for any misinterpretation of the information within the publication and reserves the right to change without notice.
• Approved to BS EN 331: 1998
• Designed and manufactured under quality management
systems in accordance with BS EN ISO 9001:2008
FM311 ISO 9001
EPSILON TERRACE, WEST ROAD, IPSWICH, SUFFOLK, IP3 9FJ HOME SALES: +44 (0)1473 277410 EXPORT SALES: +44 (0)1473 277450 UK SALES ENQUIRES: uksales@hattersley.com EXPORT SALES ENQUIRES: Mena-enquiries@hattersley.com TECHNICAL ENQUIRES: tech-enquiries@hattersley.com
www.hattersley.com
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Maintenance
(CONTINUED)
whereby a potential hazard could result. A maintenance programme should therefore include checks on the development of unforeseen conditions, which could lead to failure.
The Fig.370/371 valve drain taps should not normally require any maintenance. However these drain taps can be refurbished by fitting a new elastomeric seat washer and stem seal.
Valve seal replacement
During this maintenance exercise the valve necessitates a complete system drain down.
1. Remove the drain tap from the system.
2. Position the drain tap in a suitable vice, gripping via the hexagon at the threaded end.
3. Remove the stem-retaining sleeve (lockshield) in an anti-clockwise rotation.
4. Remove the stem in an anti-clockwise rotation.
5. Slacken and remove disk seal nut and disk seal. Gripping the stem Drive Square will assist
this operation.
6. Fit a new disk seal and refit the disk seal nut and peen thread to prevent loosening.
7. Fit new ‘O’ ring seal to the stem.
8. Refit stem and disk assembly into the valve body in a clockwise rotation to the closed
position.
9. Refit the stem-retaining sleeve (lockshield) in a clockwise rotation and tighten.
10. Operate the valve to confirm suitable operation.
11. Refit the valve to the system, close valve and pressurize checking for leakage.
For the supply of genuine Hattersley spares or technical assistance contact:
Hattersley Newman Hender Peel House, Peel Road, West Pimbo, Skelmersdale, Lancashire, WN8 9PT T: 01695 712800 | Fax: 01695 712820 | E: uksales@hattersley.com export@hattersley.com
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