A single one time use, SMA based valve (10, 210, 310, 410), that comprises: a valve house assembly that is formed with a lengthwise axis, and with an inlet flow opening for passage of gas or liquid into the valve, and outlet flow opening for passage of the gas or the liquid outwards from the valve; and a nipple component given to shearing and shoving from the instant of its being severed off, in a manner that enables passage of the gas or the liquid from said inlet flow opening to said outlet flow opening wherein the herein defined valve is a valve of the normally closed type; and an actuating assembly that is suited to be installed inside said valve's house assembly along said lengthwise axis, and that comprises heating up means, and actuating component made of material that is SMA and that is given to heating up by said heating up means in a manner that leads to its extending along the lengthwise axis of said house assembly; and a hammer component that is suited to transfer the force that said actuating component is exerting, from said instant of heating said actuating component, along said lengthwise axis to said nipple, and to bias said nipple into a strain in order to sever it off; and said hammer component is suited in addition to continue and propel said nipple for shoving and sweeping it away after it being severed off as said; and demarcation exists all the time between said gas or liquid to said actuating component, wherein said nipple, before being severed off, is connected to said inlet flow opening, characterized in that the inlet flow opening and outlet flow opening are formed substantially on at least one plane, that extends in its direction wherein it is substantially orthogonal to the lengthwise axis of said house assembly, and, characterized in that said actuating assembly comprises in addition, a springy means that is suited to cause continued propelling of said nipple following after its being severed off in order to shove said nipple away in a manner that it would not block said passage of said gas or liquid from said inlet flow opening to said outlet flow opening. a valve house assembly that is formed with a lengthwise axis, and with an inlet flow opening for passage of gas or liquid into the valve, and outlet flow opening for passage of the gas or the liquid outwards from the valve; and a nipple component given to shearing and shoving from the instant of its being severed off, in a manner that enables passage of the gas or the liquid from said inlet flow opening to said outlet flow opening wherein the herein defined valve is a valve of the normally closed type; and an actuating assembly that is suited to be installed inside said valve's house assembly along said lengthwise axis, and that comprises heating up means, and actuating component made of material that is SMA and that is given to heating up by said heating up means in a manner that leads to its extending along the lengthwise axis of said house assembly; and a hammer component that is suited to transfer the force that said actuating component is exerting, from said instant of heating said actuating component, along said lengthwise axis to said nipple, and to bias said nipple into a strain in order to sever it off; and said hammer component is suited in addition to continue and propel said nipple for shoving and sweeping it away after it being severed off as said; and demarcation exists all the time between said gas or liquid to said actuating component, wherein said nipple, before being severed off, is connected to said inlet flow opening, characterized in that the inlet flow opening and outlet flow opening are formed substantially on at least one plane, that extends in its direction wherein it is substantially orthogonal to the lengthwise axis of said house assembly, and, characterized in that said actuating assembly comprises in addition, a springy means that is suited to cause continued propelling of said nipple following after its being severed off in order to shove said nipple away in a manner that it would not block said passage of said gas or liquid from said inlet flow opening to said outlet flow opening.