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.
The minimum number of points to be eligible for non-regular retirement at the age of 60 with 20 qualifying years of service is 1,000 (50 points per year) with a corresponding retirement pay equal to 6.94 percent (1,000/360 x 2.5=6.94%) of basic pay or high three average of basic pay.n most cases, Soldiers who have completed 20 years of active service are eligible to receive Retired Pay at the end of their career. The Date of Initial Entry into Military Service (DIEMS) determines which of the three retirement systems a Soldier falls under.