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Hydraulic slow closing LLDPT Lined check valves
Paper & Food

Side Entry Rising Stem Ball Valves Without Friction

YFL Side entry rising stem ball valve which has no abrasion between sealing face during open and close operation is suitable for viscous slurry with fibers in paper & pulp industry.
  • Size:

    2''-24'', DN50-DN600
  • Pressure:

    150lbs-2500lbs, PN10-PN420
  • Body:

    A105, LF2, F304, F316, F51
  • Face to Face:

    ASME B16.10, EN558
  • Flange:

    ASME B16.5, EN10920-1
  • Test:

    API 598, API 6D
  • Leakage Class:

    Class VI
  • Medium:

    Abrasive slurry
  • products details

YFL Side entry rising stem ball valve has unique design of spiral groove in the stem to lift the ball first before rotation to eliminate the abrasion between the ball sealing face and seat sealing face. Without friction between sealing face, the rising stem ball valve has durable sealing performance and long working life in the applications which has abrasive slurry contained solid particles. 


YFL side entry rising stem ball valves operating principle:

1. When turn the handwheel to open the rising stem ball valve, the stem starts to rise and the unique spiral groove in the stem will lift the ball first to separate from the seat to eliminate friction between the the ball sealing face and the seat sealing face, and then the ball is rotated by 90 degree to fully open position when the stem rises to the top position.


2. When turn the handwheel to close the rising stem ball valve, the stem starts to move downward and rotate the ball by 90 degree to close position without contact with the seat so that there is no friction between ball andseat. And then keep on turning the handwheel, the spiral groove in the stem will drive the ball to move downward and approach to the seat tightly to realize reliable sealing with zero leakage.

YFL rising stem side entry ball valves technical features:

1. Spiral groove in the stem realizes no friction between sealing face of ball and seat during opening and closing
2. Lower operation torque, longer service life, less shutdown, less maintenance cost duo to no friction between sealing face
3. During open and close operation, the flow will flushes away the residues on the seat to protect the sealing face
4. Suitable for extreme high frequent operation


Side entry rising stem ball valves without frictions


Why Choose YFL?

1. Experienced in providing best solutions according to various sever working conditions to solve problems
2. Strict quality control from raw materials, machining to pressure test and function test
3. Professional technical support and fast response trouble shooting
4. Approved & Registered vendor of Glencore & Umicore
5. Successful cases and reference list available
6. Customizable, Flexible,  Short delivery time

Testimonials from Glencore in Mining industry

"We are very happy with the results so far, and the valves seem to be top quality.
You must understand that this factory has some of the world's toughest conditions with regards to abrasive and corrosive solutions. We dissolve metals and most products and suppliers we tested in our applications failed. "  


YFL for 誉丰利 means benefiting from reputation.

We cast brand and forge reputation by quality and service.

We focus on your satisfaction and our responsibility.

Let‘s solve problems and improve process for your projects.

For more solutions, please visit www.YFLvalve.com and contact YFL at sales@YFLvalve.com.

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