Metso AS series, Руководство по эксплуатации

Страница: 3 / 24

4 GV 76 en 3
1 GENERAL
1.1 Scope of the manual
This manual provides essential information on series AS:
Angle Steam Conditioning, Combination type valve
installed sliding stem valves. Also, this manual explaining
the GS: Desuperheater for Globe type.
Actuators and positioners are only discussed briefly. Refer
to the individual manuals for further information on their
installation, operation and maintenance.
1.2 Valve construction
Series AS, Angle Steam Conditioning, Combination type
valves are flanged (weld end available) single seated sliding
stem control valves.
The valve seat ring and cage and plug with stem is a mod-
ule accessible through the bonnet opening (top entry) of
the body.
Our standard design provides a cage guide with a piston
type plug with a quick change seat ring. The two split cages
and inserted plug seal ring makes strong support to ensure
valve alignment.
This series is available with series of reduced Cv trims and
the standard seat tightness is class III~IV, optional trims can
meet to class V, ANSI/FCI 70-2.
The detailed structure is revealed by the type code shown
on the valve identification plate. The type code is explained
in Section 11.
Fig. 1 Construction of the Neles Angle Steam Conditioning
Valve, Series AS
1.3 Valve markings
The body markings are: manufacturer's trademark, nominal
size, pressure rating and material of the body. The valve has
an identification plate attached to it, see Fig. 2.
Fig. 2 Identification (name) plate example
Markings on the identification plate:
1.
Type designation (Valve code)
2. Size, Rating
3. Cv
4. Body material
5. Plug, Stem material
6. Seat material
7. Temp. min./max.
8. Maximum (shut-off ) pressure
9. Valve manufacturing date
10. Tag No.
11. Serial No.
1.4 Technical specifications
Face-to-face length: customized dimensions depending on
the customer spec.
Body rating: Class 150 to Class 900
Max. pressure differential:
acc. to pressure class
Temperature range: amb. to +593 °C (depending on the
body materials and bonnet type)
Flow direction: indicated by an arrow on the body
(normally flow to close)
Actuator mounting: threaded bonnet with yoke nut or
bolted yoke
Stem connection: clamp with bolts/nuts
Dimensions: see Section 10
Weights: see Section 10
Note that the max. shut-off pressure is based on the mechan-
ical maximum differential pressure at ambient temperature.
You must always observe the fluid temperature when decid-
ing on applicable pressure values. When selecting a valve
you must also check the noise level, cavitation intensity, flow
velocity, actuator load factor, etc. using Nelprof.
1.5 Valve seat leakage classification
The valve follows the seat leakage classifications of ANSI/
FCI 70-2 requirement.
1.6 Recycling and disposal
Most valve parts can be recycled if sorted according to
material. Most parts have a material marking. A material list
is supplied with the valve. In addition, separate recycling
and disposal instructions are available from the manufac-
turer. A valve can also be returned to the manufacturer for
recycling and disposal for a fee.
NOTE:
Selection and use of the valve in a specific application
requires close consideration of detailed aspects. Due to
the nature of the product, this manual cannot cover all the
individual situations that may occur when the valve is
used.
If you are uncertain about use of the valve or its suitability
for your intended purpose, please contact Metso.
΅Ί΁Ͷ
ͳ΀͵Ί
΄΅Ͷ;
΄ͶͲ΅
΁ͽΆ͸
͵Ͳ΅Ͷ
Υ͑ΞΒΩ͟
ʹΧ ΄ͺ΋Ͷ
;ͲΉ͑΁΃Ͷ΄΄Ά΃Ͷ
΅Ͳ͸͑ͿΠ͟
0496
II 2 GD
235 Cheomdansaneop 1-ro, Daesowon-myeon,
C hu ng ju-si, C hu ng ch eo ng buk-do, Korea
Metso Korea Co., Ltd.
ͷͽΆͺ͵͑͸΃΀Ά΁
Υ͑ΞΚΟ͟
ͿΠ͟
΃Ͳ΅ͺͿ͸