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.
Reserve Requirements To Join. To enlist in the Army Reserve you must be: Between the ages of 1739. A U.S. citizen or registered alien - U.S. Citizens or Permanent Resident Aliens (people who have an INS I-151/I-551 Green Card) may join the U.S. Military.