Sigma Catalog 744-S v2

1 Pressure ConnectionElectricalElectrical ConnectionSeal MaterialsMaterialsTemperature RangeShipping WeightMODEL 744-SThe model 744-S Fixed Setting Pressure Switch is a piston-operated, factory set, miniature design. It s ideal for use where installation space is limited and in tough environments where oil, fuel, water, dust, vibration, and shock model 744-S has been applied in thousands of applications where its unique design, rugged construction, and high-over pressure capability has proven its long-term reliability. Standard electrical and pressure port configurations are listed below. Please consult factory for custom designs. High Over-pressure Capability High-strength Stainless Steel Construction Integral Pressure Port Snubbing Wide Media Compatibility Range High Shock & Vibration Survivability Wide Operating Temperature Range Custom Configuration UL Recognized NEMA Type 4 Rating Off Road Equipment Industrial OEM Equipment Train Braking Systems Compactors CompressorsSTANDARD SPECIFICATIONSOPERATING PRESSURE DATA2 NORTH CORPORATE DRIVE RIVERDALE, NJ 07457 PHONE (973) 616-6900 FAX (973) 616-6910 DESCRIPTIONFEATURESAPPLICATIONSF ixed Setpoint DesignExtreme Environments*Interpolate for intermediate pressures1/4 -18 NPTLead Wire ConnectorsSingle Pole Single Throw (SPST) or Double Throw (SPDT)Normally Open (NO), Normally Closed (NC)FluorocarbonEthylene PropyleneNitrile (Buna-N) O - RingHydraulic Module Housing 303 Stainless SteelElectric Module Housing Polyphenylene Sulfide (PPS)

2 (Temperature Limits Change with O - Ring Seal Material Selection)-40 F to + 250 FApproximately 3 oz-40 C to + 120 CSnap-action Electrical Switch Listed by UL and CSAAt 28 VDC:7 Amps Resistive;4 Amps Inductive;2 1/2 Amps LampGold Contact Switches available for dry circuit applications1/8 -27 NPT9/16 -18 UNJF-3 AOptions AvailableOptions AvailableSeriesRange IndicatorPressure RangeDead Band*Max System PressureProof PressurePSIGBARPSIGBARPSIGBARPSIGBAR7441 8 - - / / - - / / - - / / - - / / - - / / - - / / - - / / DIMENSIONSS eries 744 - Set pressures between 8 and 6000 PSIG See Operating Pressure data tablePressure Connection 6 - 9/16 -18 UNJF-3A (MS33656-E6) 2 - 1/4 -18 NPT (Male) Consult factory for metric and additional configurationsPressure Range Number See Operating Pressure data tableType S - Environmentally Sealed, Fixed Setting Pressure SwitchElectrical Connection 03 - SPDT - 3 Terminal Tabs with #8-32 SEMS Screws 28 - SPDT - Weather Pack Connector with 4 lead wires (socket)

3 33 - SPDT - 3 #18 AWG lead wires 10 long 37 - SPDT - Weather Pack connector with 4 lead wires (pin) Consult factory for additional electrical configurationsSet Pressure to be Held on R - Rising Pressure F - Falling PressureSet Pressure Specify factory set pressure in 4-place PSIG (Example: 0060 for 60 PSIG)Seal Materials T - Nitrile (BUNA-N) - Standard V - Fluorocarbon E - Ethylene Propylene Consult factory for other available materialsSpecial Items Wire, cable, and cable length Pressure connection Seal materials Weather-proof connectors Gold electrical contacts for low current applications Consult rep or factory for special items and configurationsORDERING SEQUENCEMODEL 744-S2 NORTH CORPORATE DRIVE RIVERDALE, NJ 07457 PHONE (973) 616-6900 FAX (973) 616-6910 ORDERING PROCEDUREBASIC PRINCIPLES OF DESIGNC ushioned ActuatorPistonPressurePortPressureSnubbe rO-RingSpringSnap ActionSwitchRigidEpoxyElectricalConnecti onLEAD WIRESS tandard Color CodeWhite - COMMRed - NCBlue - NOELECTRIC MODULE330 F RYTON (PPS) housing #18 AWG stranded lead-wire irradiatedcross linked polyethylene with heatshrink jacket secured in encapsulating compound (typical)PRESSURE PORT(9/16"-18 UNJF-3A) (typical)

4 HYDRAULIC MODULE303 SST 15/16" HEX (cropped) " "ELECTRICALINTERFACEP ackard ElectricWEATHER PACK Series Connector (typical)*All dimentions are reference*Insert available option number or letter as required7446 = 916 -18 UNJF-3AS = Environ-mentally Sealed03 = SPDT - 3 Terminal TabsF = Falling Pressure60 PSIGT-Nitrile (Buna)Example: MaterialSet Pressure Held OnElectrical ConnectorRange IndicatorPressure PortSeries Number66S03F0060 TSet PressurePressure Switch Type6 = 50-275 Sigma -Netics March 2017