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API RF check valve depends on flow of medium to open or close. It is used to avoid back flow of medium. API RF check valve can be classified into lift check valve and swing check valve
Characteristics:
1. Having compact structure, reliable sealing, beautiful modeling
2. The seal face is made of cemented carbide, having wearing resistance, corrosion resistance and long service life.
3. The stem has been tempered, having good corrosion resistance and wearing resistance.
Standards
Design: API 6D; ASME B16.34;
Length: ASME B16.10
Flanged ends: ASME B16.5
Testing & inspection: API 598
Pressure
Nominal Pressure PN(Lb) | Strength Test | Water Sealing Test | Gas Sealing Test | |||
MPa | Lbf/in2 | MPa | Lbf/in2 | MPa | Lbf/in2 | |
150 | 3.1 | 450 | 2.2 | 315 | 0.5～0.7 | 60～100 |
300 | 7.8 | 1125 | 5.6 | 815 | ||
Materials
Body | ASTM A216WCB | ASTMA351 Cf8 | |||||||||
Disc/holder | WCB | CF8 | CF8M | Monel | |||||||
Stem | F6a | F304 | F316 | Monel | F304 | ||||||
Seal face | 13Cr | 13Cr | STL | 304 | STL | 316 | STL | Monel | 304 | 304 | STL |
Base | 13Cr | STL | STL | 304 | STL | 316 | STL | Monel | 304 | STL | STL |
Body | ASTM A351 CF3 | ADTM A351 CF8M | ASTM A351 CF8 | ||||||||
Disc/holder | |||||||||||
Stem | F304L | F316L | F316 | ||||||||
Seal face | 304L | 304L | STL | 316 | 316 | STL | 316L | 316L | STL | ||
Base | 304L | STL | STL | 316 | STL | STL | 316L | STL | STL | ||
Dimensions
150Lb
Dimensions | inch | 2" | 2-1/2" | 3" | 4" | 5" | 6" | 8" | 10" | 12" | 14" | 16" | 18" | 20" | 24" |
DN | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | |
L | mm | 203 | 216 | 241 | 292 | 330 | 356 | 495 | 622 | 699 | 787 | 914 | 978 | 978 | 1275 |
H | mm | 142 | 166 | 178 | 236 | 252 | 266 | 314 | 368 | 429 | 455 | 410 | 560 | 600 | 880 |
300Lb
Dimensions | inch | 2" | 2-1/2" | 3" | 4" | 5" | 6" | 8" | 10" | 12" | 14" | 16" | 18" | 20" | 24" |
DN | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | |
L | mm | 267 | 292 | 318 | 356 | 400 | 444 | 533 | 622 | 711 | 838 | 864 | 978 | 1016 | 1346 |
H | mm | 165 | 185 | 205 | 228 | 250 | 275 | 325 | 378 | 410 | 480 | 530 | 575 | 630 | 860 |
Steel Swing Check Valve
DIN 3356 Swing Flanged Check Valve, PN1.6, 2.5, 4.0
Silent Check Valve
