Neodyn 125P Series Pressure Switch/Tamper Proof

Descriptions of Neodyn 125P Series Pressure Switch/Tamper Proof

Neodyn 125P Series Pressure Switch/Tamper Proof is designed for high-pressure pneumatic or low-impulse hydraulic applications requiring a narrow Deadband and tamper-proof setpoint. Has diaphragm sensor with efficient Nega-Rate ® Belleville disc spring for excellent accuracy and repeatability.

Features

Stable Set Points – “Eliminates Constant Recalibration”

• No moving parts except during actuation—no spring fatigue or wear.
• Set point is mostly a function of the negative rate Belleville spring—variables in snap action electrical have little effect on the set point.
• Total movement of the Belleville spring compensates for any relocation of the electrical due to case growth—consistent set point over temperature change.
• No linkage utilized—no wear which can affect accuracy.

Vibration Resistant – “Eliminates Contact Chatter”

• Belleville spring does not preload the electrical prior to actuation—snap action electrical maintains its vibration resistant characteristic.
• Small mass and inherent stability of the Belleville spring resists chatter caused by vibration.
• Snap action electrical is ruggedly mounted with minimal bracketry—no spring mounted electricals or linkages.

High Over-Pressure Capability – “No Affect on Set Point Accuracy”

• Belleville spring does not contain the pressure—no affect on system or proof pressure capability.
• The pressure sensing portion bottoms out after actuation and is fully supported—pressure sensing parts are designed for high pressure conditions.
• Limited movement of spring mechanism—no overtravel of the snap action electrical due to high pressure.

High Cycle Lifer – “Millions of Cycle”

• Short stroke minimizes wear—Belleville spring mechanism is exercised less than .020?.
• Snap action of Belleville spring reduces electrical arc—prolongs contact life.

Options

• Set Points
  125P between 20 psig dec. and 3050 psig inc. (1.4 bar dec. and 210 bar inc.)
• Wetted Material
  1 Aluminum port, Teflon-coated polyimide diaphragm, and Buna-N O-Ring
  4 316 Stainless steel port, Teflon coated polyimide diaphragm, and Buna-N O-Ring
• Electrical Form
  C 11 amp, 1/4 hp at 125 or 250 VAC; 5 amp resistive, 3 amp inductive at 28 VDC; 5 amp resistive at 125 VDC CC 11 amp, 1/4 hp at 125 or 250 VAC; 5 amp resistive, 3 amp inductive at 28 VDC; 5 amp resistive at 125 VDC
• Enclosure
  3 Meets or exceeds the requirements of NEMA Type 3, 3R, 3S, 4, 4X, and 13, IP65
• Miscellaneous
  An Epoxy paint exterior — extra protection for severe environments
• B Viton O-Ring
• C EPR O-Ring
• D SIL approval and marking, per IEC61508 (includes FMEA report)
• M Gold electrical contacts for extremely low current applications R 72? Electrical free leads
• U M20 x 1.5 Electrical Conduit Adapter
• W Stainless steel screws — exterior
• X CSA approved and CE?Mark
• Special (Consult representative or factory)
  • Pressure port per SAE AS4355E04
  • Non-catalog set point, headband, and/or proof pressure
  • Media temperature capability from -65°F to +35

Applications

• high pressure pneumatic
• low impulse hydraulic applications

Sectors

• aerospace
• general industrial
• energy and chemical markets

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