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Handle 3000psi 1 1/4 inch ASTM A105 SAE ends 2 floating balls and 1 needle valve double block and bleed valve

Handle 3000psi 1 1/4 inch ASTM A105 SAE ends 2 floating balls and 1 needle valve double block and bleed valve

  • Valve type: Double block and bleed ball valve
  • Port size: 1 1/4''
  • Pressure:3000psi
  • Material: ASTM A105
  • End: SAE
  • Operation: Handle

DBB ball valve specifications:

Design & manufacturer standard: ASME B16.34

Marking :MSS AP-25


Medium: water, oil & gas

Pressure test standard: API 598

Shell test (water):4500psi

Seat seal test(water):3300psi

Air test:0.6Mpa


Material list

Bonnet: ASTM A105



Seat: PPL

Body: ASTM A105+ galvanized

Stem:A276 410

Thrust collar: PTFE

Pin: SS

Needle:A276 304

Nut:A276 304


Valve structure:

Brief instruction of DBB ball valve:


The key to the working principle of the double block and bleed and relief function valve is the action of the two sealing slides installed on the cock.


DBB ball valve is a double block and bleed valve. Double block and bleed and relief function valves are suitable for aviation kerosene, natural gas ,light oil , pipeline gas, liquefied gas, chemical media and other pipelines, as an ideal device for cutting off medias.


The valve has an automatic relief device (optional). After the valve is completely shut off, the valve cavity is prevented from abnormally increasing pressure and the effect of the valve is checked. The valve switch indicator is synchronized with the switch position, which can accurately display the switch status of the valve.


Other materials are available base on clients' requests.

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