Cryogenic triple offset flanged butterfly valve - Flanged Butterfly Valves

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Cryogenic triple offset flanged butterfly valve
  • Cryogenic triple offset flanged butterfly valve
  • Cryogenic triple offset flanged butterfly valve
  • Cryogenic triple offset flanged butterfly valve
  • Cryogenic triple offset flanged butterfly valve
  • Cryogenic triple offset flanged butterfly valve
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Cryogenic triple offset flanged butterfly valve

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    Cryogenic butterfly valves,triple offset butterfly valve,valve supplier,industrial valves- Worm Gear Oper...

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Cryogenic triple offset flanged butterfly valve

Main Parts and Materials:
Part Name Material
Body LC1
Disc LC1
Stem SS316
Seal ring/Seat STL
Packing Graphite

Details Show:




2 Worm Gear Metal to Metal LC1 Triple Eccentric Butterfly Valve 3-22 Worm Gear Metal to Metal LC1 Triple Eccentric Butterfly Valve 3-32 Worm Gear Metal to Metal LC1 Triple Eccentric Butterfly Valve 3-4




































































  

Products Features:

1. -101℃ treatment.

2. Permanent non-deformation as rigid body construction.

3. Zero leakage as excellent seat and seal design.

4. No freeze-damage as long neck designed.

5. Firm treated stem as chrome plating or nitriding.

6. Self-pressure relief.

7. Fugitive emissions control for flammable application.


The concept of DBV triple eccentric butterfly valves:

The first eccentricity: the deviation between stem rotation center and the seat centerline ensures a tight seal between the seat and disc.

The second eccentricity: the deviation between stem rotation center and the seat centerline, when the valve opens, can make the butterfly plate leave sealing surface quickly.

The third eccentricity: the deviation between the center of the seal ring’s vertebral body and the seat centerline completely eliminates the friction between disc and seat.

offset



  

Low Switching Torque:

DBV butterfly valve series adopt the sealing design of triple eccentric, flexible multi-layer metal and graphite superimposed to ensure good sealing performance and reduce operating torque.

Zero Leakage:

Multi-layer seal self-positioning design, satisfies the demands of API598 zero leakage.

 

Blow out proof stem:

DBV butterfly valve adopts double blow out proof stem design, according with the requirement of API609 and ANSI B31.1.

Upper: stem bottom slot, embedded split ring, preventing stem blow out.

Bottom: The stem is designed with a step shaft which is matched with the bushing to prevent the valve stem blowing out.

Industrial valve manufacturers,high temperature valves,triple offset butterfly valve,valves manufacturers

Worm Gear CF8 Flange Triple Eccentric Butterfly Valve

picture (1)

Fire safe design:

    Metal and piled up multilayer graphite seal design, the inherent fire prevention function, satisfying API607 fire prevention requirements.

 

Low leakage stem seal:

1.       Stem is guided and positioned by the stem bearing during the whole course to avoide the case that the stem offset, caused by lateral pressure shock, resulted in the leakage of stem packing.

2.       Packing adopts the processing method of pre-compression, of which upper and lower ends use braided graphite rope and the middle uses forming graphite ring, to enhance the anti-leakage performance,

3.       The roughness control of stem and packing surface: Stem:Ra0.4~Ra0.8, Packing: Ra1.6.

4.       The choice of dynamic load gland flange keeps packing compressed constantly and continuously to reduce the leakage of stem packing seal,

5.       According to users’ requirements, the valve stem seal can be designed in accordance with Shell MESC77/312 and TA Luft20PPM is in accordance with the nitrogen suction method.



  DBV Butterfly Valves have been widely applied in cryogenic service, including Liquid Nitrogen, which is becoming the best unchangeable supplier. As a Valves Supplier, Industrial valves and Pipeline valves are our major products, including gate valves, globe valves, check valves, butterfly valves and ball valves. The highest quality and variety of materials (carbon steel, low temperature carbon steel, alloy steel, stainless steel, cast iron) can satisfy all requirements of the chemical, petrochemical and power plants, oil and gas, refining, ship building, water treatment and energy generation.

   DBV VALVE GROUP welcome your visiting.