Ex­cel­lent track record se­cures Ro­tork CVA se­lec­tion for crit­i­cal coal seam gas ap­pli­ca­tion

DEMM Engineering & Manufacturing - - PRODUCT WATCH -

Ro­tork CVA fail­safe elec­tric process valve ac­tu­a­tors have been se­lected for a crit­i­cal f low con­trol ap­pli­ca­tion i n t he Aus­tralian coal min­ing i ndus­try.

Sal­can Process Tech­nol­ogy man­u­fac­tures well­head skids de­signed for coal mine de­gassing du­ties. The re­motely sited skids are used i n con­junc­tion with Sal­can’s con­trol and teleme­try sys­tems to en­able meth­ane and other f lammable gases to be ex­tracted f rom un­der­ground coal seams prior to t he com­mence­ment of min­ing oper­a­tions.

Sal­can Di­rec­tor Vin­cent Cantwell ex­plains: “The Ro­tork ac­tu­ated con­trol valve al­lows us to con­trol t he f low of gas while main­tain­ing back pres­sure i n t he coal seam. Blue­tooth tech­nol­ogy em­bed­ded i n a fail­safe elec­tric po­si­tioner pack­age elim­i­nates t he need to en­ter t he haz­ardous area sur­round­ing t he valve for set up and di­ag­nos­tic f unc­tions.

“In op­er­a­tion, back pres­sure on t he coal seam is re­duced i n a con­trolled man­ner to pro­tect t he seam, t hus max­imis­ing gas ex­trac­tion. For a coal mine t his is crit­i­cal for re­duc­ing t he risk of an un­der­ground ex­plo­sion; for a gas pro­ducer it is crit­i­cal for max­imis­ing t he yield.”

The suc­cess­ful use of Ro­tork CVA ac­tu­a­tors for sim­i­lar du­ties at t housands of re­mote sites on t he Queens­land LNG pro­ject has made an i mpor­tant con­tri­bu­tion to t he se­lec­tion de­ci­sion by Sal­can.

The CVA de­liv­ers con­tin­u­ous, re­peat­able mod­u­lat­ing con­trol with a pro­gram­mable fail to po­si­tion op­tion. Res­o­lu­tion, re­peata­bil­ity and hys­tere­sis per­for­mance is quoted at less t han 0.1 per­cent of f ull scale, of­fer­ing suit­abilit y for t he most de­mand­ing con­trol valve ap­pli­ca­tions, whilst low power con­sump­tion en­ables op­er­a­tion f rom re­new­able power sources such as so­lar pan­els.

www.demm.co.nz/reader-en­quiry #151006.

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