Can I use the 107020 B&G flow control valve to control flow on a commercial zone,that is off an indirect water tank with no pump on it,only well pressure.The system was sized for gpm values that were given.At medium cycle,my water temp is dropping too much,and I need to keep that up for sanitary reasons.Duration of wash cycle is not important.Pressure is constant at 60 psi.I have this valve in inventory,and prefer to use it over a throttling valve.