McDonnell Miller Series 157 In Stock

Manufacturer:
McDonnell Miller
Description:

McDonnell Miller Series 157 Low Water Cut-Off

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

 

Replacement Heads
Model# Part# Description Weight, lbs. Price  
150S-HD 173003 Head Mechanism - Replaces 150-HD and 150E-HD 10.5 $526.68 RFQ
150S-M-HD 173203 150S-M-HD w/ manual reset - Replaces 150-M-HD 12 $526.68 RFQ
150-E-HD 171640 Obsolete - Replace with 150S-HD 12 $526.68 RFQ
150-E-M-HD 171650 Obsolete - Replace with 150S-M-HD if over 50 psi or 150S-M-MD-HD if less than 50 psi 12 RFQ
Ordering Information
Model# Part# Description Weight, lbs. Price  
157S 173502 157 Low water cut-off w/ water column 39.7 $758.11 RFQ
157-MD 173600 157 w/ maximum differential 39.7 $997.51 RFQ
157-A 173700 157 w/ alternate tapping
$Call
39.5 RFQ
157-A-M 173800 Obsolete - Replace with 157S-AM 39.5 RFQ
157-M 175400 157-M 157 LWCO W/Manual Reset 39.7 $997.51 RFQ
157-M-MD 175410 157-M w/ maximum differential
$Call
39.7 RFQ
157-R 176200 157 w/ alternate tapping 42 $1,117.20 RFQ
157-R-M 177300 157-R w/ manual reset 42 $1,117.20 RFQ
157-RBP-MD 176501 Obsolete - Replace with 157S-RBP-MD
$Call
51 RFQ
157-RL 176900 Obsolete - Replace with 157S-RL control w/alternate tapping 42 RFQ
157E-RL-M 171636 157-RL w/ manual reset 42 $853.87 RFQ
Replacement Parts
Model# Part# Description Weight, lbs. Price  
SA150-125 348300 Mercury Switch, 2 wire (Repalce the Head that has the Snap Type Switch) 0.30 RFQ
SA150-124 348100 Mercury Switch, 3 wire (Repalce the Head that has the Snap Type Switch) 0.14 RFQ
SA150M-124 348200 Switch, 3 wire w/ Manual reset - Obsolete - Replace with 150S-M-HD 0.30 RFQ
SA150-106R 347900 Bellows Assembly 0.40 $147.64 RFQ
SA150-11 347600 Float and Rod 1.00 $155.62 RFQ
150-14H 325500 Head gasket (for raised face head flange, 8 holes), 6 pack 0.50 $34.00 RFQ
EA-157-S 354106 Short electrode for 157-RBP 0.50 $131.68 RFQ
EA-157-L 354107 Long electrode for 157-RBP 0.50 $131.68 RFQ
PCH-G-A-2 179150 Probe level control (OBSOLETE NO REPLACEMENT) 2.70 RFQ
SA150M-436 348900 Cover for mercury switch, manual reset only 0.50 $74.22 RFQ
SA150-436 326950 Cover for all other models 0.50 $48.68 RFQ
Dimensions
Model A B C D E F G H J K L
157 1 1/2 13 3/8 2 5/16 4 15/16 11 3/4 16 11.5 3.5 3/4 5 7/8
157-A 1 1/4 3/4 13 3/8 2 5/16 4 15/16 11 3/4 16 11.5 3.5 3/4 5 7/8
157-R 1 1/2 13 3/8 2 1/4 5 7/8 11 3/4 17 11.5 3.5 3/4 5 7/8
157-RL 1 1/4 1/2 13 9/16 3 1/2 5 7/8 11 3/4 17 12.75 3.5 3/4 5 7/8
Electrical Ratings
Voltage Motor Switch Rating(Amperes) 120 VDC .5 Amp Full Load Motor Switch Rating(Amperes) 120 VDC .5 Amp Locked Rotor Pilot duty
120 VAC 7.4 44.4 125 VA at 120 or 240 VAC
240 VAC 3.7 22.2 125 VA at 120 or 240 VAC
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