Low Water Cut-Offs – Mechanical for Steam Boiler – Series 150S
$0.00
Description
Series 150S
Features and Benefits
- For commercial and industrial low or high pressure boiler applications
- For boilers of any steaming capacity
- 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
Optional Features
- Manual reset
- 2 Single pole, single throw switches
- 2 Single pole, double 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
- Maximum operating pressure 50 psi (3.5 kg/cm2)
Electrical Ratings
| Voltage | Pump Circuit Rating (Amperes) | Pilot Duty | |
| Full Load | Locked Rotor | ||
| 120 VAC | 7.4 | 44.4 | 345 VAC at 120 or 240 VAC |
| 240 VAC | 3.7 | 22.2 | 345 VAC at 120 or 240 VAC |
Alarm Circuit Rating (Amperes)
| Voltage | Amps |
| 120 VAC | 1 |
| 240 VAC | 1/2 |
Dimensions, in. (mm)
| A | B | C | D |
| 5-7/8 (149) | 12-7/16 (316) | 6 (152) | 13-1/4″ (337) |
| E | F | G | H | J |
| 3-5/16 (84) | 9-15/16 (252) | 4-1/8 (105) | 3-7/16 (87) | 1 NPT |
Ordering Information:
| Model Number | Part Number | Description |
| 150S | 171702 | Combination low water cut-off |
| 150S-B | 171903 | 150S w/float block |
| 150S-B-M | 172104 | 150S-B w/manual reset |
| 150S-BMD | 172002 | 150S w/float block and maximum differential |
| 150S-BM-MD | 172201 | 150S-BMD w/manual reset |
| 150S-MD | 171802 | 150S w/maximum differential |
| 150S-M | 172702 | 150S w/manual reset |
| 150S-M-MD | 172802 | 150S-M w/maximum differential |
| 158S | 178402 | 150S w/2 SPDT switches |
| 158S-M | 178502 | 158S w/manual reset |
| 159S | 178802 | 150S w/2 SPST switches |
Technical Documentation:
MM 217N Series 150S and 157S Low Water Cut-Offs/Pump Controllers
MM 219L Replacement Head Mechanism
MM 221REVI Models 157S RBP MD Low Water Cut-Offs/Pump Controllers
MM 412E Series 150 Head Gasket
MM 235G Replacement Snap Switch Assembly SWA 150S 150S MD 158S 159S
Catalog Pages:
Boiler Controls – MM-825H – Series 150S & 157S Pages 44-45
Boiler Controls Parts MM-701D Series 150, 150S, 157, 157S Pages-24-28
Additional information
| Model Number | 150S, 150S-B, 150S-B-M, 150S-BM-MD, 150S-BMD, 150S-M, 150S-M-MD, 150S-MD, 158S, 158S-M, 159S |
|---|
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