1728 Orbit Way - Minden, Nevada 89423 P: 775-782-1700 F: 775-782-1701 info@maxtonvalve.com www.maxtonvalve.com
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Pressure Switch Normally Open (PSNO-2)
Complies with ASME A17.1 / CSA B44
The Maxton Pressure Switch (PSNO-2) has been tested specifically
for hydraulic elevator applications. The switch has been pre-set for
a fast and accurate response in a low-pressure activation and can
be mounted directly to all Maxton control valves.
ASME A17.1-2010 Rule 3.26.8 - When cylinders are installed with
the top of the cylinder above the top of the storage tank, a pressure
switch shall be provided in the line between the cylinder and the
valve, which shall be activated by the loss of positive pressure at the
top of the cylinder. The switch shall prevent automatic door opening
and the operation of the lowering valve or valves. The door(s) shall
be permitted to open by operation of the in-car door button, when
the car is within the unlocking zone.
Specifications
Actuation pressure / rise 65 ±10 psi (contacts closed)
Release pressure / fall 45 ±5 psi (contacts open)
Nominal system pressure 800 psi
Max. working pressure 1000 psi
Burst pressure 5000 psi
Oil Type Hydraulic Fluid
Line connection 1/8” NPT (Male)
Overall dimensions (see drawing)
Oil Temperature range 80° F to 150° F
Electrical rating 10A 125 VAC, 6A 250 VAC (RESISTIVE)
cULus E327045
Life at 800 psi 2,000,000 cycles
Switch configuration SPST, at atmospheric pressure: open
Lead Length:96” +/- 2” (2438mm)
Wire Spec. 18# AWG-STYLE 3173
125° C 600V XLPE
CSA-CL1251
Wire color: Gray
LOW PRESSURE SWITCH (PSNO-2)
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