Main Parameters :
Design and Manufacture:BS1873,ASME B16.34
Face to Face Dimension:ASME B16.10,EN558
Flange Connection Dimension:ASME B16.5
BW Connection Dimension:ASME B16.25
Pressure-Temperature Ratings:ASME B16.34
Test and Inspection:API 598
Type of Operation:Manual,Gear,Electric,Pneumatic
Main Materials:WCB,WCA,WCC,WC6,WC9,C5,C12,LCB,LCC,CF8,304,316,CF8M,CF3,CF3M,CF8C,CN7M
Application:Fresh water, sewage, sea water, air, vapor, food, medicine, oils, alkalis, salt etc.
Industry Standards
|
Design and manufacture |
ANSI B16.34 |
| Face-to-Face | ANSI B16.10 |
| Flange Dimensions | ANSI B16.1/ANSI B16.5 |
| Weld end | ANSI B16.25 |
| Testing | API 598 |
Test pressure
|
Item/Class |
125 | 150 | 250 | 300 | 600 | 900 | 1500 | 2500 |
| Shell(hydrostatic) | 350 | 450 | 875 | 1125 | 2250 | 3250 | 5400 | 9000 |
| Seat(hydrostatic) | 230 | 320 | 620 | 825 | 1650 | 2400 | 4000 | 6600 |
| Seat(air) | 80 | 80 |
 |
80 | 80 | 80 | 80 | 80 |
Material of main parts(cast steel):
|
Parts/Group |
LCB | WCB | CF8 | CF8M |
| Body &Bonnet | LCB | A216-WCB | A351-CF8 | A351-CF8M |
| Disc | A182-F304 | A105-1025 | A182-F304 | A182-F316 |
| Seat | A182-F304 | A105-1025 | A182-F304 | A182-F316 |
| Sealing Face | 18-8/18-8,18-8/STL,STL/STL | 13Cr/13Cr,13 Cr/STL,STL/STL | 18-8/18-8,18-8/STL,STL/STL | |
| Stem | A182-F304 | A182-F6a | A182-F304 | A182-F316 |
| Stem Nut | A439-D2 | |||
| Bolt/Nut | A193-B8/A194-8 | A193-B7/A194-2H | A193-B8/A194-8 | |
| Gasket | Spiral Wounded/Soft Steel | |||
| Packing | Flexible Graphite | |||
| Handwheel | A216-wcb/A47-32510 | |||
Non-Toxic PVC Ca/Zn Heat Stabilizer
Calcium and zinc stabilizers are mainly white in appearance in powder, flakes and paste form. Powdered calcium-zinc stabilizer is used as the most widely used non-toxic PVC stabilizer, commonly used in food packaging, medical devices, wire and cable materials, etc.. At present, there are already PVC calcium-zinc stabilizers that can be used for rigid pipes in China.
Powdered calcium-zinc stabilizers are not as thermally stable as lead salts, and have certain lubricity, poor transparency, and easy to spray frost. In order to improve its stability and transparency, often add hindered phenol, polyol, phosphite and β-diketone and other antioxidants to improve.
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Hebei Fengse New Material Technology Co.ltd. , https://www.hbfengsechemical.com