Axial control valve что это
Обновлено: 27.04.2024
An axial check valve is the preferred solution for critical non-return applications such as the protection of rotating equipment and systems where low pressure loss, stable operation and dynamic behaviour are essential.
Other safety products and applications
Facts
Axial flow
Streamlined flow path through full-port expanded body avoids turbulence and prevents erosion and vibration. Process downtime and maintenance costs are eliminated.
Low pressure loss
The full opening flow passage and high-pressure recovery of the venturi-shaped body result in very low pressure loss: reduced operating cost of pumps and compressors.
Tight shut-off
Tight shut-off is obtained by means of metal-to-metal sealing between the disc and the seat. This sealing is not affected by erosion and deformation of material (like with a soft seal).
Low cracking pressure
The stability of a compressor system during startup benefits from a low cracking pressure. This is achieved with a large disc that has identical effective pressure areas on both sides (line contact sealing).
Easy opening and stable operation
The low static pressure in the venturi-shaped throat area creates a pressure differential over the disc, resulting in easy opening. The axial check valve responds smoothly to changes in flow and remains stable when it is supposed to be.
Non-slam operation
The spring-assisted design ensures ultra-fast closing with virtually no backflow and pressure surges in critical applications such as multi-pump systems or LNG trains.
Maintenance free
Internal construction is based on the application of sound basic mechanical engineering principles. Consequently, Mokveld axial check valves do not require any maintenance.
Reliable performance prediction
Both the pressure drop and the dynamic behaviour can be predicted with great accuracy, based on full-scale laboratory flow tests and a mathematical model developed in cooperation with a recognized fluid hydraulics laboratory.
axial control valve
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Can we help?
If you would like to have more information about this product, please contact us. As experts in engineered valve systems, we are capable of providing reliable customer services and can support you with valve sizing and selection, process engineering and system lay-out and budget pricing.
Special features
- Custom-designed valve to meet the clients specific process conditions.
- Fire-safe, cryogenic (LNG) and subsea design.
Excellent LNG check valve
LNG train operators put the highest priority on production availability for a steady supply of LNG to meet the long term supply contracts (and prevent the high fines in case deliveries are delayed). To obtain this production availability the most reliable equipment for critical components is preferred. Non slam check valves are critical for the LNG process and Mokveld’s Non Slam Axial flow check valves are applied in most world class LNG trains.
In the LNG process the compressor train and cooling systems account for the biggest energy consumption. Therefore it is essential to minimize the pressure loss in the compressor trains and cooling water processes. The check valve selection and sizing is essential.
Mokveld Axial flow check valves are characterized by their large flow area and high pressure recovery design. Therefore Mokveld check valves offer the lowest pressure loss on the market. Mokveld provides an application specific valve sizing with pressure drop calculation for every valve, guaranteeing the lowest pressure loss and stable operation.
axial control valve
Check valve — Tilting disc inconel check valve … Wikipedia
Piping and instrumentation diagram — A piping and instrumentation diagram/drawing (P ID) is a diagram in the process industry which shows the piping of the process flow together with the installed equipment and instrumentation. Contents 1 Contents and Function 2 List of P ID items 3 … Wikipedia
Space Shuttle main engine — SSME redirect here. For the services field, see Service Science, Management and Engineering infobox rocket engine imsize=250 caption=Space Shuttle Main Engine test firing name=Space Shuttle Main Engine country of origin=United States manufacturer … Wikipedia
Abkürzungen/Luftfahrt/E–K — Dies ist der dritte Teil der Liste Abkürzungen/Luftfahrt. Liste der Abkürzungen Teil 1 A A Teil 2 B–D B; C; D Teil 3 E K E … Deutsch Wikipedia
Product Summary
Sizes 2" - 84", Rating class ASME 150 - 2500 or API 3000 - 10000, Higher pressure ratings on request Swing check valve (including controlled closure devices)Dual-plate check valve
Piston check valve Transmission pipeline compressor discharge
LNG compressor train
Cooling water system (Ethylene, LNG)
Multiphase pumping
Subsea pump and flowline application Swing check valve
Dual-plate check valve
Ring disc check valve
Piston check valve
Silent check valve
Tilting or Pivoting disc check valve Waterworks and transmission systems, mains, loops, crossovers and tunnels
Pump discharge
Water hammer prevention
Potable and raw water
Cooling water systems
Video 72" check valve
Manufacturing a 72" Axial check valve, made to customer specifications.
Dimensionless dynamic characteristic
Mokveld and Delft Hydraulics Laboratory together developed the ‘dimensionless dynamic characteristic’ in 1986, as the mathematical model of the behaviour of non-return valves. With this Mokveld contributed to the theoretical foundation for the understanding and application of non-slam check valves. Today this theory still stands, with the ‘dimensionless dynamic characteristic’ being used in transient simulation software packages, for the hydraulic design and optimisation of pipeline systems.
Axial control valve
Selecting Mokveld axial control valves with proven reliable performance will help to reduce costly maintenance and lost production time; a choice that will ensure the safe and reliable operation of your plant.
Other control products and applications
Facts
Axial flow
Streamlined flow path through the full-port expanded body avoids turbulence and prevents erosion and vibration. Process downtime and maintenance costs are reduced.
Unique TVM®
Total Velocity Management ® concept: intelligent valve design that carefully manages fluid velocity in all areas of the valve.
High capacity
The inherent capacity of the axial valve is very high compared to the conventional globe control valve and enables selection of smaller valve size. Alternatively the higher capacity can be used to minimize pressure loss or to provide for special control features.
Accurate control
Accurate control is possible (also with minimum opening) because of the pressure-balanced trim and full surround flow. Small, spring-opposed actuators can be selected for large valve sizes.
High turndown
High inherent capacity and accurate control features make the valve suitable for applications that require high turndown providing one-valve solution for the full process envelope.
Silent
Streamlined flow path avoids turbulence and therefore energy conversion in the valve body itself. Pressure drop is taken over trim only. Dynamic body noise is minimized.
Compact
The one-piece valve body provides 20% - 70% weight reduction compared to globe valves. This feature is even more attractive combined with spring-opposed actuators.
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