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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
  • Each turn of the adjustment screw = 2 PSI

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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Brass Swivel Union
Order No. UPC Bar Code
(Qty. 1)		 Description Ctn. Qty Approx.
Wt./Lbs.

[Photo
Coming Soon]

MPS25U
MPS25U 6 42367 11931 7 1/4" female NPT x
1/4" male NPT		 ---- 0.15
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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)    
Order No. Pressure Setting
Min. Max.
MPSHD4060 ON OFF ON OFF
  40 psi 70 psi 170 psi 190 psi
MPSHD6080 ON OFF ON OFF
  50 psi 70 psi 170 psi 190 psi
MPSHD80100 ON OFF ON OFF
  50 psi 70 psi 170 psi 190 psi
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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
  • Each turn of the
    adjustment screw = 2 PSI
115 2 HP 3 HP
230 3 HP 5 HP
460-600 5 HP 5 HP
MPSHD Model
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