Ball valve me­ter­ing

DEMM Engineering & Manufacturing - - PUMPS & VALVES -

Ham-Let’s me­ter­ing ball valve (MBV) in­cor­po­rates both me­ter­ing and shut-off func­tions in one unit, has been patented in the US and won the firm recog­ni­tion for its in­no­va­tive tech­nol­ogy.

The MBV se­ries valve com­bines an ac­cu­rate mi­cro-me­ter con­trol mech­a­nism for gases and liq­uids with a seal­ing mech­a­nism in a sin­gle unit. It is easy to in­stall and does not re­quire mul­ti­ple con­nec­tors and pipe­lines. It is re­li­able and easy to op­er­ate and can dras­ti­cally re­duce the length of the line in the sys­tem.

The MBV se­ries is a sin­gle unit that re­places the two sep­a­rate valves pre­vi­ously re­quired, de­creas­ing in­stal­la­tion and main­te­nance costs while re­duc­ing the risk of faults.

De­vel­oped by the firm’s re­search and de­vel­op­ment depart­ment, the MBV se­ries is win­ning mar­ket share as it is prov­ing to be more ro­bust, and so more eco­nomic than ex­ist­ing sys­tems.

“The MBV Se­ries de­liv­ers in­dus­try’s high­est de­gree of ac­cu­rate me­ter­ing flow for mod­er­ate pres­sure ap­pli­ca­tions,” said Ham-Let’s VP en­gi­neer­ing and R&D, Felix Sh­es­tatsky. “It fea­tures an in­no­va­tive and unique shut-off ca­pa­bil­ity that al­lows full con­trol of the process, from ex­tra fine reg­u­la­tion to a com­plete valve shut-off.”

With the choice of three pre­ci­sion stem ta­pers en­abling me­ter­ing at flow ca­pac­i­ties as low as Cv= 0.0001 with up to 11 han­dle turns, the MBV se­ries meets the de­mand for highly pre­cise flow con­trol.

The MBV of­fers five dif­fer­ent O-ring ma­te­ri­als pro­vid­ing the best tem­per­a­ture and chemical cov­er­age, mak­ing it ideal for an­a­lyt­i­cal in­stru­men­ta­tion in­dus­tries.

“The tech­nol­ogy used in pre­vi­ous mi­crom­e­ter valves is based on an ex­tremely del­i­cate nee­dle that is eas­ily bro­ken and can­not guar­an­tee that the value is com­pletely sealed,” said Sh­es­tatsky.

“In or­der to her­met­i­cally seal a sys­tem, the sys­tem en­gi­neer would have to add a sec­ond valve – most com­monly a ball valve – to de­tach and seal the line. This en­tailed many dis­ad­van­tages in­clud­ing ex­tra costs, com­pli­cated in­stal­la­tion, additional pipe­lines, mul­ti­ple po­ten­tial leak­age points and more.”

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