51S MECHANICAL WATER FEEDER Vendor_McDonnell & Miller • Operates on temperature change

• Operates on temperature change only

4 bar) clean filtered air supply and where a 4 to 20mA DC or 0 to 10 VDC signal is provided by an elec tronic sensor

50-300°F (10-149°C)

The “Normally Closed” Solenoid pilots are designed to shut down the Main valve if there is a power failure

• Magnetic repulsion eliminates need for bellows

51S MECHANICAL WATER FEEDER Vendor_McDonnell & Miller • Operates on temperature changeWater Feeders Mechanical Series 51 S 51 S 2 Mechanical Water Feeders Low Water Cut Offs For high capacity [up to 35,000 sq. ft. (3250m2)] low pressure steam and hot water boilers with cold water feed Optional features No. 2 switch Manual reset Float block Proportional feed action Maximum water supply pressure 100 psi (7 kg cm2) Maximum inlet water temperature 120F (49C) Maximum vessel pressure 35 psi (2. 5 kg cm2) McDonnell & Miller Water Feeder Data