Aleksin Plant of Heavy Industrial Valves - Tyazhpromarmatura
Home page E-mail Site map For print Home page

Sampling testing of ball valve DN 1200 mm PN 8.0 MPa was successfully completed

Ball valve DN 1200 mm PN 8.0 MPa

Periodical tests of ball valve DN 1200 mm PN 8.0 MPa made by JSC "Tyazhpromarmatura" Alexin were carried out in accordance with TU 26-07-1450-96 "Program and methods of ground tests" and requirements "General technical specification --98" within the period from the 4th up to 14th of October 2004 on testing area of "Saratovorgdiagnostica" (branch enterprise of JSC "Orgenergogas").

Pneudraulically actuated ball valve DN 1200 mm PN 8.0 MPa was first produced in 2004 (MA 39183-1200 serial No 599). The valve is intended for non-aggressive service with natural gas at temperature from -60 up to +80. The Shut-off device is "trunnion mounted". Contents and completeness of ball valve DN 1200 mm PN 8.0 MPa conforms to TU 26-07-1450-96 and working drawings MA39183-1200. Ball valve performance was checked by operating time "open-closed" under differential pressure on the ball 2.0 MPa and constant gas flow direction and by addition of mechanical impurities to the extend of 50 ml (contents: 75% sand, 25 % welding hail 1 piece of electrode for diameter of 3 mm and 20 mm long ) every 150 cycles to supply pipeline. Total number of operating cycles is 500, they include:

  • for remote operating - 450 cycles;
  • for local operating - 40 cycles;
  • for manual standby - 10 cycles.  

Gas leakages do not exceed the standard stated by Program requirements and methods of ground tests and -3-98, this rate makes 200cm3/min. The commission concluded that the submitted serial specimen of ball valve DN 1200 mm PN 8.0 MPa made by JSC "Tyazhpromarmatura" Alexin (MA 39183-1200 serial No 599) was successfully tested and the results of the periodical tests were considered to be acceptable.

 

October 26, 2004

Back

© 2004-2017 JSC "Tyazhpromarmatura"