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Merrill's Product Catalog: Pressure Switches, Pressure Gauges

Pressure Switches
Merrill Pressure Switches
Quality Benefits
  • Individually boxed
  • Captive nut on cover
  • Pressure switch pipe connection 1/4" NPT
  • Adjustment instructions are inside top cover
  • Contact points open on cut-out pressure
  • Points close on cut-in or pressure drop

Low Water Cut-Off Benefits

  • Shuts off at approximately 10 psi below cut-in pressure
  • Auto start - manual start or off lever
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Pressure Switches
Order No. UPC Bar Code
(Qty. 1)		 Preset On
(PSI)		 Preset Off
(PSI)		 Ctn. Qty. Approx.
Wt./Lbs.
MPS2040 6 42367 09067 8 On @ 20 psi Off @ 40 psi 50 0.96
    (138 kPa) (276 kPa)    
MPS3050 6 42367 09068 5 On @ 30 psi Off @ 50 psi 50 0.96
    (207 kPa) (345 kPa)    
MPS4060 6 42367 09069 2 On @ 40 psi Off @ 60 psi 50 0.96
    (276 kPa) (414 kPa)    
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Switches with Pulsation Plug On Inlet
Order No. UPC Bar Code
(Qty. 1)		 Preset On
(PSI)		 Preset Off
(PSI)		 Ctn. Qty. Approx.
Wt./Lbs.
MPSP2040 6 42367 09592 5 On @ 20 psi Off @ 40 psi 50 0.96
    (138 kPa) (276 kPa)    
MPSP3050 6 42367 09593 2 On @ 30 psi Off @ 50 psi 50 0.96
    (207 kPa) (345 kPa)    
MPSP4060 6 42367 09594 9 On @ 40 psi Off @ 60 psi 50 0.96
    (276 kPa) (414 kPa)    
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Low Water Cut-Off Pressure Switch
Order No. UPC Bar Code
(Qty. 1)		 Preset On
(PSI)		 Preset Off
(PSI)		 Ctn. Qty. Approx.
Wt./Lbs.
MPSM43050 6 42367 09582 6 On @ 30 psi Off @ 50 psi 50 1.0
    (207 kPa) (345 kPa)    
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Heavy-Duty Pressure Switch
Order No. UPC Bar Code
(Qty. 1)		 Preset On
(PSI)		 Preset Off
(PSI)		 Ctn. Qty. Approx.
Wt./Lbs.
MPSHD4060 6 42367 11780 1 On @ 40 psi Off @ 60 psi 1 2.15
    (276 kPa) (414 kPa)    
MPSHD6080 6 42367 11708 5 On @ 60 psi Off @ 80 psi 1 2.15
    (414 kPa) (552 kPa)    
MPSHD80100 6 42367 11691 0 On @ 80 psi Off @ 100 psi 1 2.15
    (552 kPa) (690 kPa)    
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Merrill Pressure Switch
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Heavy-Duty Electrical Ratings
Voltage Single
Phase AC		 Polyphase
AC
  • 240/600 volt three phase 5 HP Pump
  • 120/240 volt single phase 3 HP Pump
  • Extra large case for wiring with heavy-duty gauge wire
115 2 HP 3 HP
230 3 HP 5 HP
460-600 5 HP 5 HP
MPSHD Model MPSHD Model
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