McMaster-Carr logo
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    6 Products
    About Pressure Gauges
    industrial info icon

    Find a gauge with the right connection material and dial type—many with traceable calibration certificates.

    Low-Pressure Differential Gauges with Color Indicator

    A band of green, yellow, and red provides a clear indication of changes in differential pressure. Gauges are commonly used to indicate clogged filters.
    Glass-Filled Nylon Case with Anodized Aluminum Connections (Pounds per Square Inch)
    Image of Product. Front orientation. Differential Pressure Gauges. Low-Pressure Differential Gauges with Color Indicator.
    Pressure
    Range, psi
    Green
    Band
    Yellow
    Band
    Red Band
    Max. Pressure,
    psi
    Environment
    Temp. Range, ° F
    Process Temp.
    Range, ° F
    Ht.
    Wd.
    Dp.
    Case
    Color
    For Use With
    Accuracy
    Each
    1/4 NPT Female Threaded Pipe Connection
    0 to 22 to 2.52.5 to 3.5300-40 to 200-40 to 2003 1/4"3 1/4"1 1/2"BlackAir, Water, Hydraulic Fluid, Carbon Dioxide, Nitrogen, Hydrogen, Argon, Acetylene±5%2238K210000000
     

    Panel-Mount Back-Pressure-Regulating Valves for Air and Inert Gas

    Image of Product. Front orientation. Pressure-Regulating Valves. Panel-Mount Back-Pressure-Regulating Valves for Air and Inert Gas.
    Threads below the adjustment knob and an included panel-mount nut allow you to add these valves to your instrument panel. Often used in systems running on air compressors, they're installed after pressure-sensitive equipment to obstruct flow and maintain a consistent operating pressure. If the system pressure exceeds the set pressure, they exhaust through the outlet. Adjust the set pressure within the range.
    Inlet
    Outlet
    Pipe
    Size
    Thread
    Size
    Location
    Max. Pressure,
    psi
    Pipe
    Size
    Thread
    Size
    Location
    Pressure Adjustment
    Method
    End-to-End
    Lg.
    Panel Cutout
    Dia.
    For Use With
    Temp. Range,
    ° F
    Outlet Pressure,
    psi
    Each
    NPT Female
     
    Polysulfone Body—Buna-N Diaphragm and Silicone Seal
    1/8
    		—Side1001/8
    		—SideKnob1 1/8"9/16"Air, Inert Gas40 to 1500.5 to 3.599045K11000000
     
    UNF Female
     
    Polysulfone Body—Buna-N Diaphragm and Silicone Seal
    —10-32
    		Side100—10-32
    		SideKnob1 1/8"9/16"Air, Inert Gas40 to 1500.5 to 3.599045K1200000
     

    Plastic Panel-Mount Pressure-Regulating Valves for Air

    Image of Product. Front orientation. Pressure-Regulating Valves. Plastic Panel-Mount Pressure-Regulating Valves for Air.
    Regulate pressure in air systems from your instrument panel—these valves have threads below the adjustment knob and come with a panel-mount nut. All automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range. Body is polysulfone, which is lightweight and corrosion resistant.
    Inlet
    Outlet
    Pipe
    Size
    Thread
    Size
    Location
    Max. Pressure,
    psi
    Pipe
    Size
    Thread
    Size
    Location
    Pressure Adjustment
    Method
    End-to-End
    Lg.
    Panel Cutout
    Dia.
    For Use
    With
    Temp. Range,
    ° F
    Outlet Pressure,
    psi
    Each
    NPT Female
     
    Polysulfone Body—Buna-N/EPDM Diaphragm and Polyurethane Rubber Seal
    1/8
    		—Side1501/8
    		—SideKnob1 9/16"9/16"Air40 to 1500.5 to 3.543275K16000000
     
    UNF Female
     
    Polysulfone Body—Buna-N/EPDM Diaphragm and Polyurethane Rubber Seal
    —10-32
    		Side150—10-32
    		SideKnob1 1/8"9/16"Air40 to 1500.5 to 3.543275K3600000
     

    Plastic Panel-Mount Pressure-Regulating Valves for Water

    Image of Product. Front orientation. Pressure-Regulating Valves. Plastic Panel-Mount Pressure-Regulating Valves for Water.
    For easy panel mounting in your water system, these valves have threads below the adjustment knob and come with a panel-mount nut. They automatically reduce a high, variable inlet pressure to a lower, stable outlet pressure. Adjust the outlet pressure within the range. Body is polysulfone, which is lightweight and corrosion resistant.
    Inlet
    Outlet
    Thread
    Size
    Location
    Max. Pressure,
    psi
    Thread
    Size
    Location
    Pressure Adjustment
    Method
    End-to-End
    Lg.
    Panel Cutout
    Dia.
    For Use
    With
    Temp. Range,
    ° F
    Outlet Pressure,
    psi
    Each
    UNF Female
     
    Polysulfone Body—Buna-N/EPDM Diaphragm and Polyurethane Rubber Seal
    10-32
    		Side15010-32
    		SideKnob1 1/8"9/16"Water40 to 1500.5 to 3.543275K66000000
     
    back to top