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.
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.
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
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.
Main Performance Parameters for ASME Standard
Flange Connection Dimension
Size≤24”according to ANSI B16.5 Size≥24”according to ANSI B16.47 Series B
Test and Inspection
Temperature and Pressure Level
Face to Face
API 609 ISO 5752 basic series 13
Test Pressure at Room Temp.
Water, Oil, Gas and Other Corrosive Media (Different Media Use Different Materials)
-46℃~550℃ (Different Temp. Conditions Use Different Materials)
Main Performance Parameters for DIN Standard
According to GB/T13927-92
Water, Air, Oil, Gas, Steam, and Corrosive Media
Main Performance Parameters for GOST Standard
PS: We also can do according to customer's requirements.
1. DBV butterfly valve is characterized by simple structure, small volume and light weight, and it is easy to install and adjust.
The valve is widely used in the medium and low pressure pipeline.
2. Good sealing performance，corrosion resistance，high pressure and temperature resistance, smart control and safe use.
3. The unique design of triple eccentricity makes no friction between the sealing surface and extend the valve service life.
4. The elastic seal is produced by the torque.
5. The wedge design makes the valve close more and more tightly by automatic sealing function, and there’s compensation
and zero leakage between the sealing surfaces.
Material for Main Parts
WCB, 304, 316, 316 L, CF8M,etc.
WCB, 304, 316, 316 L, CF8M, etc.
316, 2Cr13, 1Cr18Ni9Ti, etc.
316, Fluorine Plastic, etc.
Flexible Graphite, Fluorine Plastic, etc.
Gear Operated Pneumatic Actuator
Why Choose DBV？
1. Factory Overview
2. Quality Control
3. Storage and Warehouse
4. Package and Delivery
5. Honor and Certificate
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