RKS fluid was founded in 1997. We are a production workshop for both foundry and machining, research & development center, and quality inspection cent...
Swing check valve is mounted with a disc that swings on a hinge or shaft. The disc swings off the seat to allow forward flow and when the flow is stop...
Features： Fully bore globe pattern design, lowest head loss while fully open Keep stable working condition even the flow rate close to zero High sens...
Ⅰ Business area: fluid control products, technology and environmental protection products. Ⅱ Advanced CNC machining centers, professional process ce...
RKS fluid was founded in 1997. We are a production workshop for both foundry and machining, research & development center, and quality inspection cent...
Series: SASQUATCH series soft seal gate valve Port size: DN50 - DN900 (NPS2-NPS36) Pressure rating: PN10, PN16 Temperature: 0℃~80℃ Connection: Flange Certificate: CE ,WRAS,API,OHSAS18001:2007,ISO9001:2015
Series: HYDRA Series Resilient Seat Butterfly Valve Temperature: -29℃ ~ +120℃ Pressure: PN6, PN10, PN16(Class 150) Port Size: DN32-DN2400(NPS1 1/4-NPS96) Power: Manual, Electric, Pneumatic, Hydraulic
Butterfly valves have been around for a long time, and are used for a variety of applications. They made their first appearance during the 1930s, and have been utilized by several industries ever since. Often made out of cast iron, butterfly valve's name is based from the functionality of its disc.
The wafer butterfly valve is one of the most common types of valves in industrial pipelines. The structure of wafer butterfly valve itself is relatively small. It is only necessary to put the butterfly valve in the middle of the flange at both ends of the pipe, and use the stud bolt to pass through the pipe flange and the pair.
The manual valve is a valve operated by the handle and the hand wheel, and is a commonly used valve on the equipment pipeline.
Valves are the most common equipment in chemical companies. It seems easy to install valves, but if they are not implemented in accordance with the re...
DIN standard now uses EN standard structure length
EN 558-1 PN flange connection valve construction length (instead of DIN 3202), EN 558-2 CLASS flange connection valve construction length (instead of BS2080), EN 12982 butt weld end valve construction length (instead of DIN 3202), DIN standard The length of the structure including the length of the API valve is basically the same as the length of the GB...
Resilient-seated gate valve with bolted cover connection; made of ductile iron materials and with epoxy coating, designed as both clockwise and anti-c...
The butterfly valve disc is a key component of the butterfly valve, which acts on closing and opening and closing. Butterfly valve seat and butterfly ...
What is Kieselguhr Filter? What's the working principle of Kieselguhr Filter? The kieselguhr filter (Candle filter / Cake Filter) which we for customized for fluorine chemical plant six more lithium fluoride phosphate phosphorus process have been installed and working for two years
MINOTAUR series replaceable seat high performance butterfly valve
Pump stations place much higher operational demands on valve systems than conventional gravity pipelines. Frequent startup and shutdown cycles, pressure fluctuations, and large-diameter flow control all require valves with stable sealing performance and reliable operating characteristics.
For this reason, double eccentric butterfly valves are widely used in municipal water transmission systems, irrigation pumping stations, cooling water circulation systems, and industrial utility pipelines.
Compared with concentric butterfly valves, the double eccentric design provides lower operating torque, reduced seat wear, and better long-term reliability for medium and large diameter pump station applications.
Lower Operating Torque for Large Diameter Pipelines
One of the main challenges in pump station systems is operating torque, especially in DN800 and larger pipelines.
In many municipal pumping stations, oversized actuators or unstable gearbox operation can increase maintenance requirements and affect valve performance during frequent operation cycles.
Because the disc moves away from the sealing seat during opening, double eccentric butterfly valves reduce unnecessary seat friction during operation. This helps lower operating torque compared with conventional concentric designs.
For large diameter water transmission pipelines, this becomes particularly important when selecting:
RKSfluid Athena Series double eccentric butterfly valves are available from DN150 to DN1800 and support ISO 5211 actuator mounting configurations for gearbox and automation systems.
For higher pressure systems, customized PN40 configurations are also available for selected applications.
Better Reliability in Frequent Pump Operation
Pump stations often experience repeated valve operation during:
In these conditions, excessive seat friction can accelerate sealing wear in conventional butterfly valves.
The double eccentric structure minimizes continuous contact between the disc and sealing seat during operation, helping improve seat life and long-term sealing stability.
This is particularly beneficial for:
Improved Performance Under Surge Conditions
Water hammer and surge pressure are common risks in long-distance pumping systems.
Improper valve closing speed or unstable actuator control can create sudden pressure fluctuations inside the pipeline, especially in large diameter water transmission systems.
In practical pump station design, valve torque stability and controlled closing characteristics are often more important than simple shut-off performance.
Double eccentric butterfly valves are commonly selected because they provide:
For large municipal water projects, these factors directly affect long-term operational reliability.
More Practical for Large Diameter Water Systems
Compared with gate valves, double eccentric butterfly valves offer several practical advantages for medium and large diameter pump station pipelines:
This is one reason why they are widely used in:
The Athena Series is manufactured according to EN 593 and EN1074-1/2 standards, with double flange connections according to EN1092.
Available body and disc materials include:Ductile iron, EN-GJS-500-7, CF8, CF8M
Seat sealing options include EPDM and NBR depending on water quality and operating conditions.
Actuator and Gearbox Selection Remains Critical
For DN1200 and larger butterfly valves, actuator sizing should always be evaluated together with:
In many pump station projects, improper actuator sizing can lead to unstable operation or excessive torque loading during emergency shutdown conditions.
The Athena Series supports gearbox and electric actuator configurations for medium and large diameter water pipeline applications, including optional IP68 solutions for demanding outdoor environments.
In modern pump station systems, valve selection is closely related to torque stability, surge control, maintenance requirements, and long-term operational reliability.
For medium and large diameter water pipelines, double eccentric butterfly valves provide a practical balance between sealing performance, operating efficiency, and lifecycle cost.
If you are looking for reliable solutions for your pipeline system, RKSfluid team is ready to support your project with professional technical advice and customized product solutions. Feel free to contact us for more information, technical consultation, or a tailored quotation.
1. Request valve torque data for your pipeline project
2. Get actuator sizing support for large diameter butterfly valves
3. Discuss pump station valve selection with RKSfluid engineers
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