Flange RTJ or RF with Thread BSP or NPT Ends Double Block and Bleed Ball Valve(Twin or Double Ball) Conform to API 6D, BS5351, and ASME B16.34.
They are tested according to API 598, and marked as per MSS SP-25
1. Construction is as follows
- Full Port or Reduce Port |
- Twin Ball Design |
- Bolted Bonnet with spiral-would gasket |
- Fire Safe Design |
- Anti-static Design & Blow-out proof stem |
- Double Block and Bleed |
- With Needle Bleed Valve |
- With Drain Valve |
- Screwed Ends to ASME B1.20.1 |
- Flanged Ends to ASME B16.5 |
2. Main Part & Materials
Part Names |
Part Materials |
Body |
A105 |
LF2 |
F22 |
F304 |
F316 |
F304L |
F316L |
Bonnet |
A105 |
LF2 |
F22 |
F304 |
F316 |
F304L |
F316L |
Ball |
A105+ENP |
SS304 |
F22 |
SS304 |
SS316 |
SS304L |
SS316L |
Stem |
A105 |
F304 |
F6a |
F304 |
F316 |
F304L |
F316L |
Seat/Seat Ring |
PTFE/RPTFE/NYLON/DEVLON/PEEK or METAL |
Packing |
Graphite/PTFE |
Gasket |
SS304+Graphite/SS304+Graphite |
Bolts/Nuts |
B7/2H |
L7/4 |
B16/4 |
B8/8 |
B8M/8M |
B8/8 |
B8M/8M |
Suitable Medium |
W.O.G etc. |
HNO3, CH3OOH etc. |
Suitable Temperature |
-29~425 °C |
-46~340 °C |
-46~340 °C |
-196~427 °C |
-196~427 °C |
-196~427 °C |
-196~427 °C |
3. Normal Pressure Rating
PN10~PN420, CLASS150~2500
4. Normal Size Range
DN15~DN300, 1/2"~12"