英国鹤牌青铜过滤器、英国鹤牌黄铜过滤器、英国鹤牌不锈钢过滤器、英国鹤牌铸铁过滤器
Engineering Data Sheet Document No:- 004B00808D799 rev 3
Page 1 of 4
Installation, Operation & Maintenance Instructions for Date 16th November 2004
Fig 808 and 908 “Y” type Bronze Strainers
© Crane Ltd. 2004
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).
The regulations apply to all piping with a maximum allowable pressure greater than 0.5 bar. Piping with a
maximum allowable pressure not exceeding 0.5 bar are outside the scope of the Directive. Piping is categorised
in accordance with the maximum working pressure, size and ascending level of hazard, which is dependent on
the fluid being transported. Fluids are classified as Group 1, dangerous fluids or Group 2, all other fluids including
steam. Categories are SEP (sound engineering practice) and for ascending levels of hazard, I, II, III or IV. All
piping designated as SEP do not bear the CE mark nor require a Declaration of Conformity. Categories I, II, III or
IV carry the CE mark and require a Declaration of Conformity (Note- all piping 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 strainer is dependent on its application, frequency of use and freedom from misuse. Compatibility
with the system into which it is installed must be considered. The properties of the fluid being transported such as
pressure, temperature and the nature of the fluid must be taken into account to minimise or avoid premature
failure or non-operability. A well-designed system will take into consideration all the factors considered in the
strainer design, but additionally electrolytic interaction between dissimilar metals in the strainer 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 strainer.
LIMITS OF USE
The strainers 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.
These strainers are not suitable for steam service.
Fluid Group 2 Liquids
Fig No. PN DN Category
808 & 908 25 15-150 SEP
Operating pressures and temperatures
Fig No PN Non-shock pressure at
temperature range
Non-shock pressure at
max. temperature
808 25 25 bar from –10o
C to 100o
C 10.5 bar at 186o
C
908 25 25 bar from –10o
C to 100o
C 21.8 bar at 120o
C
Not suitable for fatigue loading, creep conditions, fire testing, fire hazard environment, corrosive or erosive
service.
