Flange Triple Offset Butterfly Valve

Flange Triple Offset Butterfly Valve

Flange Triple Offset Butterfly Valve can be widely used in chemical、fertilizer、metallurgy、system Pharmaceutical、power、oil gas 、steel works、wineries、paper mills、coal mines...

Product Details

【Product Introduction】:

ZHEJIANG ZHENGFENG VALVE Flange triple offset butterfly valve, which is triple offset design, can withstand up to 900 LB level, temperature as low as -196 ℃, up to 700 ℃, sealed to zero leakage, control ratio up to 100: 1 or more. In other words, in a variety of harsh, critical process control pipeline, whether it is switch valve or control valve, the three eccentric butterfly valves will be your best choice, which is safe and low cost.

The valve main materials include 304, 304L, 316, 316L, A105, WCB,Hastelloy , Inconel, LC2, LC3,LCB, WC6, WC9, C5, 4A, 5A, Monel, nickel alloy, titanium alloy, 20 alloy steel etc.


【Product Details】:

Size12''
PressureClass 150
Connection TypeFlange ends
Operation Manual gear box
Torque2300/N.m
Cv figure in Full Open Position3780
Face to face length178mm
Painting ColorBlack
Painting Color RAL numberRAL9005
Suitable Temperature-29°C ~ 280°C
Suitale PressurePN<2.0Mpa
ApplicationIndustrial application
Valve StructureTriple offset
FunctionShutoff
Suitable serviceWater , Oil and gas
OriginChina


【SEAT OVERLAY TECHNICS COMPARITION:

A0FF751B7CB7C6B0F2CF612D666DE857 - 副本_副本  VS  IMG_5793 IMG_5793

                                 ZFVLAVES                                             OTHERS


The procedure of surfacing the sealing surface of ZFVALVES seat is as follows:            

1. The wire number is Stellite 6.            

2. Welding wire shall be filament (diameter 3.2 mm or 4.0 mm)            

3. Argon Arc Welding (TIG)            

4. Surfacing thickness not less than 4.5 mm            

5. Preheating temperature 150-200 degrees Celsius            

6. The interlayer temperature is about 500 degrees Celsius, the number of surfacing layers is 2, the post-weld heat treatment temperature is 700 degrees Celsius, and the heat preservation time is 3 hours.            

7. Surfacing width according to design drawings            

8. No porous impurities or cracks are allowed in the surfacing layer.           

9. Hardness of weld layer HRC38-42            

*Attention: Surface roughness of valve seat before surfacing is above Ra12.5 micron. Surface contamination such as rust, grease and water should be strictly cleared. No cracks, spalling and other defects should be allowed.


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