Severn’s 5000 Series range of LNG Anti-Surge control valves benefits from decades of infield experience to deliver high performance, easily maintained, reliable and high-quality valves for the most severe applications.
The high-capacity body galleries ensure maximum capacity and valve performance.
The high tun down trims provide the required controllability for high value Anti-Surge applications while ensuring the capacity requirements of 1.8-2.2 times the maximum capacities are adhered to, ensuring reliability and precision for the end user.
Articles
- High-capacity globe and angle bodies
- Quick change trim as standard
- Robust parts for trouble free service and low maintenance costs
- Inherently characterised trims available in linear, bi-linear, equal percentage
- Substantial guiding
- Wide choice of packing systems including low fugitive emission designs to ISO 15848-1
- High performance, high force actuators
- Superior accuracy
- High performance meeting industry specifications without concession
Sizes
- 1/2in (12mm) – 42in (900mm). Integral or Separable Flanges, Screwed, Butt or Socket weld ends. For other styles please contact us.
Valve Body Ratings
- ASME 150 – 4500
- EN 1092 PN 10 to PN 400
- API 5000 – API 15000
Body Styles
- Globe
- Angle
End Connections
- Raised Face.
- Flat Face.
- Ring Type Joint.
- Butt Weld End available on request.
Bonnet Styles
- Standard.
- High temperature.
- Cryogenic.
Trim options
- Concentric Cage(s), Multi-labyrinth trim and Varstage. A vast array of alternative trims are available depending on the application.
Construction Materials
- A wide range of standard materials are available for both the valve pressure containing parts and trim, including carbon and stainless steel, duplex/super duplex and high nickel alloys. Stellite, and other hard facings/coatings are available. We also provide a range of tungsten carbide and ceramic material options for severe service trims. For further details on materials please contact us.
Actuation
- High power double acting piston actuators
Instruments
- A wide range of control instruments are available from Severn, including: positioners, air-filter regulators, volume boosters, solenoid valves, and lock-up valves.
- Surge Control for Liquefied Natural Gas (LNG) Compressors: Three Reasons to Make it a Priority
- How Highly Engineered Compressor Surge Control Improves LNG Plant Performance
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- LNG compressor problems?
- Severn’s Anti-Surge Valves Satisfy Rigours of Dynamic Testing, Without Concession
- HIPPS
- LNG Industry
For 65 years, Severn’s focus has been upon maximising the performance of its valve applications to help clients secure their safety and commercial objectives. We have a long history of providing Anti-Surge Actuator valves and actuator systems for the most demanding of Anti-Surge applications.
Specific Anti-Surge standards are extremely strict and difficult to achieve. However, through significant investment and extensive R&D, Severn has achieved the following:
- The Compressor Controls Corporation (CCC) AN17 specification
- The Nuovo Pignone (GE) specification
Severn’s experience in satisfying many challenging compressor Anti-Surge applications has shown that bespoke design is the key to achieving optimum performance. Each application is uniquely sized, selected and designed in line with the client’s specific requirements to offer unparalleled reliability and value.
- Extremely fast acting
- Rapid response and accurate positioning
- Consistent performance
- Optimized for valve travels and shutoff conditions
- Low friction seals
- Sealed from external contaminants
- Robustly guided
Severn’s P-Series Piston Actuator is designed for fitting onto a wide range of Control valves, louvres or dampers, these high-power actuating units are for use in on/off, or modulating service with increased thrust capacity compared to diaphragm actuators.
Available as either a single acting or double acting unit. The design is field reversible and utilises a wide range of springs to provide positive fail action. Positioners are normally yoke mounted and of the double-acting type providing air to both sides of the piston and giving a robust and precise unit that is resistant to load fluctuations.
Severn P-Series Piston Actuator Design Features:
- High thrust capability, capable of using air supplies up to 150psig (10bar)
- Multi-size options with long stroke capability
- Robust components for trouble-free, low-cost ownership
- Positive spring air fail action, which is not field reversible
- Lightweight corrosion resistant construction
- Rotary options available
Severn P-Series Piston Actuator Benefits
- High degree of stem positioning accuracy
- Cylinder design has lower air consumption than a comparable diaphragm actuator
- Highly stable providing inherent stiffness over full stroke
- Highly responsive with minimum latency on movement or positioning
- High resolution of stem positioning for up to 12in strokes as standard with longer strokes available
- Adjustable actuating forces to suit different applications
- Rigorous in-field testing
- Manufactured to ISO 9001 certification
To find out more about the P-Series Actuator, download the brochure. If you have an Actuator based enquiry, you can contact the Severn team by completing the enquiry form located here.
Severn’s W-Series Pneumatically Operated Spring & Diaphragm Actuator is designed to satisfy the majority of general Control valve applications.
With proven reliability, even in the most adverse climate conditions and temperatures, the range compromises three basic actuator sizes which, when combined with different spring ranges, provide a travel capability of up to 3 1/2 (89mm). The spring air fail action delivers crucial reliability for critical applications and a pre-compressed bench set is available across the range of fitted springs.
Severn W-Series Diaphragm Actuators Design Features:
- High power, fast response
- Operates from low-pressure air supply
- Low-stressed, positive spring fail action in either air fail open or close orientation
- Field reversible to change fail safe position
- Steel construction with minimal parts for low-cost, trouble-free operation and maintenance
- The assembly is bolted to a cast yoke combining lightness with mechanical strength
Severn W-Series Diaphragm Actuators Benefits
- Proven, reliable, low-cost performance
- Fire-resistant construction, with positive fail position
- Adjustable pre-compressed spring forces
- High degree of reliability with low hysteresis
To find out more about the Severn W-Series Diaphragm Actuators, download the brochure via the downloads box on the right-hand side or view the interactive version below.
If you have a Severn W-Series Diaphragm Actuators based enquiry, you can contact the Severn team by completing the enquiry form located here.
The Severn 1000 Series Control Valve benefits from more than five decades of experience in providing cost effective and easily maintained valves for applications found through the applications of Power and Oil and Gas Industries.
It has a simple design which provides rugged reliability and is based upon a cast top entry style body in a range of material options. The Severn 1000 Series Control Valve is available with a screwed seat through to advanced multi-stage trim options.
Design Features:
- Smooth profile cast globe body construction
- Wide range of trim options available
- Robust part for trouble free service and low cost of ownership
- Valve body proportioned to withstand high pipe stresses without distortion
- Inherently characterised trims available in linear, equal percentage or semi-throttle
- Both balanced and unbalanced trim designs available with soft seat or hardened insert option
Severn 1000 Series Control Valve Benefits:
- Top-entry servicing with immediate access to plug and seat
- Reduced inspection and maintenance costs
- Trims compact and easy to install
- Excellent flow capacity and control rangeability
- Reduces potential erosion and noise problems
- Reliable leakage performance, bubble tight shut off available
- Low actuating forces required with balanced trim styles
To find out more about the Severn 1000 Series Control Valve, download the brochure or view the interactive version below.
If you have a Control Valve based enquiry, you can contact the Severn team by completing the enquiry form located here.
Severn’s 1200P Series Globe Control Valve is designed to exceed the expectations of hydrocarbon and similar industry applications.
The hallmarks of the 1200P design are its high flow capacity, durable shut-off and low emission performance. The 1200P Series also uses NACE conforming material options to provide reduced overall dimensions and weights for increased valve performance.
The unique static balance seal with camped seat, minimised use of shims / gaskets. Along with robust cage guiding ensures ruggedness and durability.
Standardised components and interchangeability and interchangeability across sizes, ratings and trim options enable less inventory and spares, paving the way for stock holding and shorter lead times. The 1200P series is designed for ease in manufacturing, assembly, operation, and maintenance.
Design Features:
- Smooth profile cast globe and angle body construction
- Quick-change trim as standard
- Micro spline, contoured, 1CC and 2CC trim options
- Robust parts for trouble free service and low maintenance costs
- Inherently characterised trims available in linear, bi-linear or equal percentage
- Substantial guiding
- Wide choice of packing systems including low fugitive emission designs
- Integral plug system construction option
- Both balanced and unbalanced trim designs with soft seat insert options
Benefits
- Top-entry servicing with easily maintained trim sets
- Reduced inspection and maintenance costs
- Trims are easily installed
- High flow capacity and control rangeability
- Reliable leakage performance. Bubble tight shut off available
- High interchangeability between sizes and other products
- Low weight
- Manufactured to ISO 29001 certification and compliant with PED requirements
- Low actuating forces required with balanced trim styles
To find out more about the 1200P Series Control Valve, download the brochure via the downloads box on the right hand side or view the interactive version below.
If you have a Control Valve based enquiry, you can contact the Severn team by completing the enquiry form located here.
The 1200 Series Globe Control Valve is designed to exceed the expectations of Hydrocarbon and similar industry applications. Higher flow capacity, durable shut-off, low emission, NACE conforming material options, reduced overall dimension and weight are the hallmarks of this design.
The static balance seal with clamped seal, minimised use of shims / gaskets along with robust cage guiding ensures ruggedness and durability.
Standardised components and interchangeability across sizes, ratings and trim options enable less inventory and spares, paving way for stock holding and shorter lead times. The product is designed for ease in manufacturing, assembly, operation, and maintenance.
Design Features:
- Smooth profile cast globe and angle body construction
- Quick-change trim as standard
- Micro spline, contoured, 1CC and 2CC trim options
- Robust parts for trouble free service and low maintenance costs
- Inherently characterised trims available in linear, bi-linear or equal percentage
- Substantial guiding
- Wide choice of packing systems including low fugitive emission designs
- Integral plug system construction option
- Both balanced and unbalanced trim designs with soft seat insert options
Benefits:
- Top-entry servicing with easily maintained trim sets
- Reduced inspection and maintenance costs
- Trims are easily installed
- High flow capacity and control rangeability
- Reliable leakage performance. Bubble tight shut off available
- High interchangeability between sizes and other products
- Low weight
- Manufactured to ISO 29001 certification and compliant with PED requirements
- Low actuating forces required with balanced trim styles
To find out more about the 1200 Series Control valve, download the brochure or view the interactive version below.
If you have a Control Valve based enquiry, you can contact the Severn team by completing the enquiry form located here.
Engineered For India’s Chemical Industry – With Severe Service DNA
Built on Severn’s 65-year legacy in general and severe service upstream, midstream and downstream industries, the 1600 Series brings proven engineering excellence into chemical process applications – delivering reliability, stability, and performance.
Engineered for India’s Chemical Demands
Severn meet the demands of the chemical industry by providing modularised, quick turn around product to meet the expedited delivery times often required by the Chemical Industry.
Accurate, investment cast, valves from the 1600 range allow Severn to meet the needs of the industry while still offering the highly engineered, severe service 1200 and 5000 series for more exotic material combinations. Providing a reliable and dependable partner to those operating in the chemical industry.
Predictable control in the Chemical sector.
Benefits:
- Superior surface finish, smooth profile cast globe and angle body construction.
- Consistent flow paths.
- Micro spline, contoured, ported and 1CC trim options.
- Inherently characterised trims available in linear, non-linear or equal percentage.
- Choice of packing systems.
- Highest Cv per stroke in category.
- Reliable leakage performance.
- Universal standout & actuator mounting.
- Low weight.
To find out more about the 1600 Series Control valve, download the brochure via the downloads section on the right hands side.
If you have a Control valve based enquiry, you can contact the Severn team by completing the enquiry form located here.
The Severn 3000 Series Control Valve was initially developed over five decades specifically for installation in cryogenic cold boxes. As such, the 3000 Series control valve now benefits from extensive experience in providing cost effective and easily maintained valves in an industry which makes stringent demands upon its suppliers.
Construction materials of the body are generally aluminium or stainless steel to suit adjoining pipework, while the fully machined flow path minimises particle pick up and ensures a degree of cleanliness necessary for the industrial gas market.
Design Features:
- Smooth profile barstock globe, angle, and three-way body construction
- Extension & body lengths to suit installation
- Cold box flange adjustable or welded
- Clamped or screwed in seat standard, cage trim options
- Large choice of trim sizes available with low noise and anti-cavitation options
- Robust parts for trouble free service and low cost of ownership
- Inherently characterised trims available in linear, equal percentage or semi-throttle
- Cleaned and degreased for Oxygen service as required
- Soft seat insert option for ANSI Class VI shutoff
- Various options of weld end and flanged connections
Benefits
- Top-entry service with direct access to plug and seat reducing inspection and maintenance costs
- Extensive trim selection
- Excellent flow capacity and control rangeability
- Reliable leakage performance, bubble tight shut off available
- High interchangeability between sizes and other products
- X-ray option available on all welds
To find out more about the 3000 Series Control Valve, download the brochure or view the interactive version below.
If you have a Control Valve based enquiry, you can contact the Severn team by completing the enquiry form located here.
