RE: Motor Operated Valve. The head of the operator is often shown as M inside a square. The limit switches ZSC/ZSO is acceptable under ISA. I have never seen ZSH/ZSL (high and low for a linear valve I suspect) in my industry. If the valve is used for on/off, it usually takes a XV or UV tag name. If the valve is used for regulatory control application, then they would take the normal PV, FV, TV type of designation. I have also seen HV for operator control only valves.
To join the United States Marine Corps as an infantryman or, as that military occupational specialty is known in this branch of service, rifleman, you need a general technical score of 80 on the Armed Services Vocational Aptitude Battery.
As a member of the Army Reserve/National Guard, you must have 20 years of service to be eligible for retired pay when you reach the age of 60. A qualifying year is one in which you earn a minimum of 50 retirement points. The reference for how retirement points are established can be found in AR 140-185. It is your responsibility to ensure that you achieve the minimum points required to achieve a qualifying year. How do you get the points needed for a qualifying year? One point for each day of active service