ZFV flange triple offset butterfly valve, which is triple offset design, can withstand up to 1500 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.
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, aluminum plants, engineering, construction, municipal, HVAC,liquefied gas, food, water and other pipelines Imported devices.
|Connection Type||Flange ends|
|Operation||Manual gear box|
|Cv figure in Full Open Position||3780|
|Face to face length||178mm|
|Painting Color RAL number||RAL9005|
|Suitable Temperature||-29°C ~ 280°C|
|Valve Structure||Triple offset|
|Seal Structure||Laminated stainless steel + graphite|
|Need Extended Stem||No|
|Suitable service||Water , Oil and gas|
|Provide Matching Flanges and bolts||Availale|
body material carbon steel A216 WCB,
disc material stainless steel A351 CF8M,
seal material laminated SS316+graphite.
stem material A182 F316
Design and manufacture API 609
Face to face dimension API 609
End flanges dimension ANSI B16.5
Test & inspection as API 598
|Supplying Mode||OEM production|
|EN 10204-3.1 certificate||Yes|
*ZFVALVES is a modern enterprise who is professional in international standard valve research, design, manufacturing, sale, installation and service .
*Our Flange Triple Offset Butterfly Valve are mainly based on ISO, API, ANSI, BS, DIN NF, JIS, GB, JB and other standard production, nominal diameter 2"-80" (DN50-DN2000mm), pressure rating 150Lb-2500Lb (PN6-PN150), the operating temperature -196 degrees C, ~680 degrees.
*Main products of ZFV company include butterfly valve , globe valve, check valve, gate valve, ball valve and so on.
*Our products always be sold worldwide inlcude Middle Aast countries, Southeast countries, European countries, America countries , Africa countries and so on.
BODY SEAT SEAL OVERLAY TECHNICS COMPARITION :
ZFV triple offset butterfly valve, body and seat can be integral structure, seating surface surfacing cemented carbide, although reducing the cost of materials, but increased the difficulty of valve body processing. Before surfacing, the sealing surface of the valve seat should be roughly machined, and the thickness after roughing should ensure the thickness of the welding layer after finishing.
Above is a comparison of ZFV seating seating surfacing with that of other manufacturers.
The procedure of surfacing the sealing surface of ZFV 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.