1200 Series - Valves.Com Pte Ltd

GLOCON GROUP
Series 1200 Globe valve
Pressure class ASME 150 - 600
Series 1200 Valves - Features
Application
The Severn Glocon Series 1200 is derived from the Series 5000 range of Globe valves.
The Series 1200 benefits from more than three decades of experience in providing cost effective and easily maintained high
valued quality valves in industries where consistently punishing environments have ensured a design to give rugged reliability.
A wide range of construction materials offers a choice to suit the specific application, while the smooth body flow path reduces
turbulence, minimising the effects of erosion and noise.
Design Features
u Smooth profile cast globe
u Quick-change trims standard, screwed-in seat option
u Wide choice of trim sizes available with low noise and
anti-cavitation options
u Robust parts for trouble free service and low cost of
ownership
u Inherently characterised trims available in linear,
bi-linear, equal percentage or semi-throttle
u Massive guiding
u Wide choice of packing systems
u Integral plug stem construction option is available
u Both balanced and unbalanced trim designs available
with soft seat insert options
Benefits
u Top-entry servicing with immediate access to plug and seat
u Reduced inspection and maintenance costs
u Trims compact and easy to install
u Excellent flow capacity and control rangeability
u Reduces potential erosion and noise problems
u Reliable leakage performance, bubble tight shut off
available
u High interchangeability between sizes and other
products
u Low actuating forces required with balanced trim styles
Quality Engineered
u Rigorously proven on-site performance
u Produced with Quality Systems certified to ISO 9001
u Compliance with PED requirements
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Engineering Data
Severn Glocon Series 1200 Valves
General
The Series 1200 range of valves were developed to
provide a cost effective, reliable and easily maintained
control valve capable of working in rigorous environments.
The quick-change trim option provides for easily
accessible seat and trim components to minimise fitting and
parts replacement times. Stem guided contoured trim in
both balanced and unbalanced configuration gives
excellent rigidity and resistance to vibration and service
wear. The valve is designed to accommodate other
products within the Severn Glocon range e.g. C.C
(concentric cages) low noise, and anti-cavitation trims.
End connection Sizes/Types
1in (25mm) - 10in (250mm). Integral or Separable Flanges,
Screwed Butt or Socket weld ends. For other consult
factory.
Design Standard
ASME B16.34
Valve Body Ratings
ASME 150 - ASME 600
Body Configurations:
2-way Globe straight
Body Face to Face Dimensions
ANSI/ISA 75.08
Bonnet Styles
Standard, Normalising. For other styles consult factory.
Standard Bonnet Packing
Teflon/Chevrons and Graphite
Trim Options
“Quick change”, Concentric Cage(s), Multi-step,
Micro Spline and Trickle Trim
Inherent Trim Characteristics
Equal %, Linear, Quick open. Others on request.
Plug options
Balanced, Unbalanced
Cage/Top guided
Contoured, Multi-Step
Hard faced or solid hard plugs
Soft seat option
Plug/Seat Leakage Class
ANSI/FCI 70.2. Class IV as standard, Class V with
metal seat and Class VI with soft seat insert
Materials of Construction
A wide range of standard materials are available for both the
valve pressure containing parts and trim. These include
carbon and stainless steel, duplex/super duplex plus high
nickel alloys. Stellite, and other hard facings/coatings are
available. For full listing on materials consult factory.
Paint
A wide range of paint finishes are available including
enamel, alkyd gloss and various epoxy finishes.
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Fig.2. Series 1200 Globe Valve
Direction of Flow
Either direction - depending upon application.
Preferred flow directions are…
Contoured unbalanced (1” to 4”)
: Flow under
CC Trim unbalanced (upto 4”)
: Flow under
CC Trim balanced (6”,8”,10”)
: Flow under
Anti cavitation CC Trim
: Flow over
Flashing service
: Flow over
Noise abatement CC Trim (6”,8”,10”) : Flow under
Actuator stability check shall be carried out as necessary.
Clean Build
Severn Glocon maintains high clean build standardsutilising clean build areas including Oxygen clean and a
Ultra High Purity clean room.
Inspection and Testing
Inspection & Testing to Severn Glocon’s standard as well
as to almost all international standards/ customer’s
requirements.
Actuation
Various types of actuation are available including:Series P Linear spring pneumatic cylinder,
Series N Numotor pneumatic piston,
Series W Diaphragm-spring pneumatic actuator.
In addition electric, hydraulic, electro hydraulic actuators
and manually operated versions are available.
Instruments
A wide range of control instruments are available from
Sever Glocon including:Positioners, Air-filter Regulators, Volume Boosters,
Solenoid Valves, and Lock-up Valves.
Valve Body Style Option
The Severn Glocon Series 1200 valve is available in three basic body styles of either globe, angle or 3way. Many parts are
interchangeable, with the exception of the valve bodies. The angles pattern has an optional venturi seat which may be
specified in order to provide additional protection to the valve outlet.
Fig.3. Globe Body
Fig.4. Angle Body
Fig.5. Three Way Body
Bonnet Option
Usually constructed in the same material as the valve body, selection of the bonnet design is undertaken on the basis of both
the operating temperature range and the fluid media handled. A temperature range of - 190° C to 580° C is achievable.
Balance Seal
Fig.6.
Standard Bonnet
Fig.7.
Normalising Bonnet
Seal Retainer
Fig.8.
Balanced seal Installation
Fig.9.
Balanced Bonnet
Standard Bonnet
Balanced Bonnet
The standard bonnet enables the forming of a deep
The balanced bonnets are suitable for temperatures up to
packing box together with a long guide housing, thereby
580° C when fitted with graphite packing and Graphite
providing a robust and vibration resistant assembly. Teflon
balancing rings and up to 232° C when fitted with PTFE
rings are the standard packing up to 250° C.
packing and PTFE balance seal.
Normalising Bonnet
Protects the packing from excessive heat or cold, which may
adversely affect valve or packing performance.
Application temperature range depends upon the valve and
bonnet construction materials.
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Standard Trim Options Available
Fig.10. Unbalanced Trim
Fig.11. Balanced Trim
Fig.12. Hard facing options
Standard duty - Normal Flows
“Quick Change” balanced and unbalanced contoured trim are
available.
Suitable for modulating and on/off duty.
u Valve Size Options
Standard range up to 10ins. Large sizes consult factory.
u Plug Options
Balanced and unbalanced, contoured metal seated.
Resilient/soft seat insert option available.
Fig.13. Soft seat insert
u Characteristics Available
Equal %, Linear or Semi-throttle others on request.
u Direction of Flow
Either direction - dependent upon application.
u Hard Trim Options
Hard coatings/facings - Seat Area or Full Contour.
Solid - Seat and/or Plug.
Wide choice of materials dependent on service conditions.
u Soft/Resilient Seating
Soft seat insert fully supported and integral within the seat.
Fig.14. Trickle Trim
Standard Duty - Low Flows
u The Trickle Trim/Micro Spline range provides for high
rangeability and control of low flow rates.
u Plug Options
Unbalanced with metal to metal seating faces.
u Direction of flow
Either direction - dependant upon application.
u Guiding
Top-guided.
Fig.15. CC Cage Trim
Severe Service Duties
Single/Multiple Concentric Cage (C.C) trims are available for higher pressure drop applications to prevent the onset of
cavitation and to reduce noise levels.
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Flow coefficients Cv
The Cv values detailed in the tables are at the maximum rated travel and states in US units. The figures by definition are
related to the flow of water (Specific gravity =1) in US Gallons per minute with a pressure drop 1 PSI.
The Cv values mentioned below are nominal. Please consult with factory for process Cv over 80% of the rated Cv.
Table 1: Trickle Trims
Note: For valve and Trim sizes outside this range - Consult factory
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Noise and Cavitation Control
As a fluid passes through a restriction (normally the trim in a valve), a pressure reduction and subsequent velocity increase
takes place. Immediately after the restriction, the point of lowest pressure and highest velocity is called the “vena contracta”.
After which pressure recovery takes place together with a reduction in fluid velocity. The amount the fluid recovers has a great
influence on the valve trim design.
Fig.16. Explanation of Cavitation control using Multistage low recovery trim
For liquids, if the pressure at the vena contracta goes below the liquid’s vapour pressure - bubbles are formed. If the
subsequent pressure recovery to P2 (downstream pressure) exceeds the fluid’s vapour pressure - the vapour bubble
collapse or implode - this is called “Cavitation”. This can occur within the valve or in the downstream pipe work. The energy
dissipated can cause extensive damage to valve and pipe work. If the pressure recovery stays below the fluid’s vapour
pressure then “Flashing” occurs. Multi-stage pressure let down / “Anti-cavitation” valve trim designs enable the required
pressure drop across the valve to be achieved in a number of stages as illustrated in Fig.16.
The velocity of the fluid through the valve has a major influence on the erosive effect of the fluid on the valve body and trim thus the control of fluid velocity and the appropriate selection of materials is critical to the valve performance and service life.
Higher fluid velocities, particularly in gas service, can generate noise in the valve and pipe work - thus velocity control is major
factor in containing noise emissions within acceptable limits (normally <85 dBA).
Severn Glocon’s valve trim designs, engineered for a specific application, may include a combination of:
u Multi-stage pressure reduction stages,
u Tortuous paths - as the fluid changes direction energy is dissipated,
u Flow impingement of one flow path onto another also causes energy loss,
Severn Glocon can provide a trim solution having considered the process control conditions, preferred flow direction as well
as initial and life cycle costs as well as application experience.
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Standard dimensions and weights
Fig.17. 1200 series valve fitted with
W-series actuator without hand wheel
Fig.18. 1200 series valve fitted with
W-series actuator with side mounted hand wheel
Table 4: Dimensions of Standard 1200 unbalanced valve with W-series actuator
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Table 5: Dimensions of Standard 1200 balanced valve with W-series actuator
Notes:
1.
2.
3.
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For other sizes and rating consult factory
For dimensions where unit is not indicated consider the unit as “mm”.
Dimensions shown may vary depend upon options selected on actual product
GLOCON GROUP
Severn Glocon Ltd.
Olympus Park, Quedgeley
Gloucester, GL2 4NF, UK
Telephone: +44(0) 845 223 2040
Fax: +44 (0) 845 223 2041
Severn Unival Ltd.
Milford Buildings, Milford Street
Huddersfield W Yorks, HD1 3DY, UK
Telephone: +44(0) 148 451 8080
Fax: +44(0) 148 451 8087
Severn Glocon India Private Ltd.
F-96/97, SIPCOT Industrial Park
Irrungattukottai, Chennai 602 105
Telephone: +91 44 4710 4200
Fax: +91 44 4710 0073
Cat Ref SG 1200 rev 2009-0
Website: www.severnglocon.com
The Severn Glocon policy is one of continuous improvement and the right is reserved to modify this specification bulletin without notice.