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Double Eccentric Flange Butterfly Valve
RKS fluid was founded in 1997. We are a production workshop for both foundry and machining, research & development center, and quality inspection cent...
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Industrial Stainless Steel Cartridge Filter Manufacturer
Type:Cartridge filter Material:SS304, SS316L Filtration Precision:0.1-20um Pressure:0.6Mpa, 1.0Mpa Filter core number:1~12 PC Filter element length: 2~40 inch Temperature:≦130℃ Application: Chemical industry. Water treatment, Papermaking, Automobile industry, petroleum, Machining, Coating, electronic etc.
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Stainless steel solid-liquid separation candle filter
Series: Candle Filter Filter core length: 800~2500 Filter cylinder dimensions: 550~2200 Filter cake specification:15~60mm Filter core number: 7~205 Filter area: 0.9~144.8㎡ Application: Biopharmaceutical, Chemical Industry, Food and beverages, Metal processing
News
The Difference Between A Lug and Wafer Butterfly Valve
2019-02-12 16:59:28
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.
Wafer type butterfly valve installation instructions and steps
2019-01-03 16:27:13
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.
How Does a Pressure Reducing Valve (PRV) Work?
2024-10-15 16:58:28
Twenty-five Taboos for Valve Installation
2019-09-06 10:23:57
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...
Manual valve operation method
2019-04-01 11:50:16
The manual valve is a valve operated by the handle and the hand wheel, and is a commonly used valve on the equipment pipeline.
Valve common standards and differences
2019-05-07 17:37:21
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...
Butterfly Valve Seat & Seal Ring Replacement Method
2021-02-01 18:14:53
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 ...
Resilient Seated Gate Valve
2022-10-17 16:09:38
Resilient-seated gate valve with bolted cover connection; made of ductile iron materials and with epoxy coating, designed as both clockwise and anti-c...
What's the working principle of Kieselguhr Filter?
2019-07-01 13:05:32
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
New designed PTFE RPTFE sealing replaceable seat high performance butterfly valve
2022-04-24 10:39:22
MINOTAUR series replaceable seat high performance butterfly valve
DN300 PN16 Needle Valve
- Size: DN200~DN1600
- Pressure Rating: PN10, PN16, PN25
- Medium: Fresh water, Raw Water
- Temperature: -10~70℃
- Face to Face.: EN558-1; Size >DN500, FTF is 1.5* DN.
- Flange Drilling: EN1092-2
- Driving Mode: Electric, Worm gear, Pneumatic, Hydraulic, etc.
- Product Details
The RKSfluid Needle Valve is a cylinder-type flow regulating valve designed for large-diameter water pipelines requiring controlled flow adjustment and energy dissipation. The valve uses a guided cylinder mechanism to vary the flow passage, supporting precise regulation of flow rate and pressure under suitable operating conditions.
Its hydraulic design directs water through an annular flow passage and an engineered outlet arrangement to dissipate excess hydraulic energy and help reduce cavitation risk. Different cylinder or sleeve configurations can be selected according to the required flow characteristics, differential pressure and operating range.
Designed primarily for fresh water and raw water systems, this valve is suitable for water intake, water transfer, water distribution and hydropower applications. Final selection should be based on pipeline size, pressure conditions, required flow range and the project's hydraulic performance requirements.
| NO. | Parts Name | Material |
| 1 | Body | EN-GJS-400-15 |
| 2 | Stem | SS420 |
| 3 | Bearing | Bronze |
| 4 | Crank | SS/DI |
| 5 | Connecting Rod | SS/DI |
| 6 | Cylinder | SS304 |
| 7 | Seal | EPDM |
| 8 | Outlet Retaining Ring | SS304 |
FEATURE:
- Rational design, integrated valve body structure
- The guide rail is surfacing-welded with bronze alloy to form a precise guide for the cylinder movement.
- High control precision and low maintenance rate.
- Valve opening vs flow: linear relationship, precise regulation
- Cylinder moment: pressure-balanced, low operating torque
- Flow cross-section: annular symmetry at all times
- Main sealing ring: non-flow area installation, long service life
- Installation: vertical/horizontal/angled
- Sleeve replacement: different opening-flow characteristic curves
- Post-valve installation: air supplement joint/orifice plate, meet different working conditions
Cylinder / Sleeve Configuration Options:
- Standard Type: Intended for high-flow operating conditions.
- Slot Type: Intended for applications with moderate flow rates and pressure conditions.
- Multi-Hole Type: Designed for high-pressure applications where distributed flow passages are required for energy dissipation.
- Short-Slot Type: Intended for operating conditions with a wide variation in flow rate and pressure, including systems with substantially different flow demands across operating stages.
Need a Needle Valve for Your Water Pipeline Project?
Share your valve size, pressure rating, flow range, inlet and outlet pressures, and installation conditions. RKSfluid can review the application requirements and help identify a suitable cylinder configuration.
FAQs
A cylinder-type needle valve regulates flow rate and pressure in large-diameter water pipelines. It is commonly used in water intake, transmission, distribution and hydropower systems where controlled flow adjustment and hydraulic energy dissipation are required.
An actuator moves the valve cylinder through a stem and crank-linkage mechanism, changing the effective flow area. The resulting flow depends on valve opening, differential pressure and the system operating conditions.
Selection should consider inlet and outlet pressures, maximum differential pressure, minimum and maximum flow rates, water temperature and downstream conditions. The valve configuration and hydraulic performance curves should be reviewed to assess energy dissipation and cavitation risk.
These configurations provide different flow characteristics for different operating ranges. Standard types target high-flow service, slot types moderate flow and pressure conditions, multi-hole types high-pressure applications, and short-slot types wide variations in flow demand. Final selection requires model-specific performance data.
The valve is designed for a near-linear opening-to-flow relationship under specified operating conditions. Actual performance depends on differential pressure, cylinder configuration and system characteristics. Refer to the applicable flow characteristic curve for selection.
The stated series range is DN200–DN1600, with pressure ratings of PN10, PN16 and PN25 and an operating temperature range of -10°C to +70°C. Availability depends on the specific size and configuration;
Horizontal, vertical or inclined installation may be possible depending on the valve design and project arrangement. Confirm the permitted orientation, actuator clearance, support requirements and flow direction with the approved installation drawing.
Provide the nominal size, pressure rating, medium, operating temperature, inlet and outlet pressures, minimum and maximum flow rates, installation orientation and required cylinder configuration. Include the pipeline drawing and hydraulic performance requirements where available.
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