- Model # 157S
- Application Steam Boilers
- Control Reset Automatic
- SWA-150S
- 120V/240V
- Maximum Pressure 150 PSI
- 1" Connection Size
Features
• For residential, commercial and industrial low or high pressure boiler applications
• For boilers of any steaming capacity
• Monel bellows provides corrosion resistance
• Float chamber with integral water column provided
•`Snap action for high temperature service
– 1 Single pole, single throw switch for pump control
– 1 Single pole, double throw switch for low water cut-off and alarm actuation
• Optional features
– Manual reset
– Integral conductance probes for additional levels and greater operating differential-Model 157S-RBP-MD
– 1" or 1-1/4" NPT equalizing tappings
– 1/2" or 3/4" NPT tappings for gauge glass/tri-cock
installations
– BSPT threads
• Maximum pressure 150 psi (10.5 kg/cm2)
McDonnell & Miller model number 157S is a combination float-operated low water cut-off and pump controller for steam boilers with an integral water column. The controller has 1/2" NPT tappings for gauge glass and tri-cocks. This control features an automatic reset with two 120 volt bi-metal snap switches. One switch is single pole, single throw for pump control. The other is single pole, double throw for low water cut-off and alarm actuation. Its maximum pressure is 150 psi and it has a tapped 1" FIP connection
