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Hydraulic slow closing LLDPT Lined check valves
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Hydraulic Slow Closing Butterfly Valves With Accumulator

YFL Hydraulic slow closing butterfly valves with accumulator are used as check valves and gate valves to cut off flow automatically and reduce water hammer to protect pipeline equipments.
  • Size:

    DN150-DN5000, 6''-200''
  • Pressure:

    PN6/PN10/PN16/PN25/PN40, 150lbs/300lbs
  • Body:

    Cast iron steel, Cast carbon steel
  • Seat:

    EPDM or Stainless steel
  • Open time:

    10-60S for sizes ≤DN1000; 20-120S for sizes >DN1000
  • Slow closing time:

    2.5-60S for sizes ≤DN1000; 6-90S for sizes >DN1000
  • Quick closing time:

    1.5-15S for sizes ≤DN1000; 2.5-30S for sizes >DN1000
  • Close degree:

    75°±10° for quick close, 15°±10° for slow close
  • products details

YFL Hydraulic slow closing butterfly valves with accumulator don't need to be equipped with counter weight, so it is more compact to be installed in limited space.

The hydraulic slow closing butterfly valves are also called as butterfly type check valves, since it can be used as check valve to cut off return flow and protect upstream pipeline equipments. With intelligent accumulator and hydraulic actuator, the butterfly valves can be closed slowly to eliminate water hammer so that the hydro turbine, pumps and other pipeline equipments won't be damaged. 

The hydraulic slow closing butterfly valves can replace check valves and gate valves together to save the installation space and make maintenance more easy. It can be controlled remotely and automatically by electric control cabinet and remote control system.

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 production, mechanical machining, pressure test to 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. Short delivery time, no min. order request

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 create values for your projects.


hydraulic butterfly valves with accumulator

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