McDonnell Miller (176220) 157S-R Low Water Cut-Off & Pump Controller With Alternate Tappings
McDonnell Miller (176220) 157S-R Low Water Cut-Off & Pump Controller With Alternate Tappings
- SKU 176220
- in stock
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McDonnell & Miller model number 157S-R 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 an alternative tapped 1" FIP connection.
Part Number: 176220
Overview
- Monel bellows provides corrosion resistance
- Snap action switches 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
- Alternate Tappings
For commercial and industrial low or high pressure boiler applications and boilers of any steaming capacity.
Optional Features
- Manual reset
- 2 Single pole, single throw switches
- Float block
- BSPT threads
- Maximum pressure 150 psi (10.5 kg/cm2)
- Model 150S-MD Maximum differential operation – Prevents nuisance burner shutdowns in low pressure applications
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