ITT Neodyn by Aerospace Controls

Pressure Switches

ITT is a focused multi-industrial company that designs and manufactures highly engineered critical components and customized technology solutions. Our customers in the energy, transportation and industrial markets depend on us to solve their most critical problems, and we focus on partnering with them to find solutions to their unique challenges. Founded in 1920, ITT is headquartered in White Plains, N.Y., with employees in more than 35 countries. The company has sales in approximately 125 countries.  

Unlike most other pressure and temperature switches, ITT Neodyn switches are negative rate type switches (i.e. Belleville spring) which are snap acting devices. At a certain pressure (apex of the spring curve) the spring snaps over center. At this point, it takes less pressure (force) to continue its movement. The pressure switch set point is a function of the Belleville spring. The electrical switch is in a fixed position and is synchronized to the movement of the Belleville. ITT Neodyn Temperature switches operate in a similar way via the expansion pressure of the liquid filling within the temperature probe.
 
Advantages of the Nega-Rate® Belleville Disc Spring Switches
 
STABLE SET POINTS - “Eliminates Constant Recalibration” BECAUSE:
• 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”BECAUSE:
• 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” BECAUSE:
• 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 LIFE - “Millions of Cycles” BECAUSE:
• Short stroke minimizes wear—Belleville spring mechanism is exercised less than .020".
• Snap action of Belleville spring reduces electrical arc—prolongs contact life.
 


Pressure Switch/Internal Adjustment. The 100P5 spring pressure switch is designed for division 2 hazardous areas and applications which include pneumatic and low impluse hydraulics up to 3000 psig. Enclosure 5.

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Series Pressure Switch/Internal Adjustment. The 100P (diaphragm sensor) for pneumatic and low impulse hydraulics up to 3,000 psig system pressure. Enclosure 3.

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Series Pressure Switch/External Adjustment. The 101P (diaphragm sensor) is for pneumatic and low impulse hydraulics up to 3,000 psig. Enclosure 3.

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Series Tamper Proof Pressure Switch. These all purpose miniature switches are of extremely light weight and durable construction. Small size improves vibration and shock resistance. Enclosure 2 or 5.

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Series Pressure Switch/Internal Adjustment - This weather-proof design for low pressure applications. Enclosure 3.

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Series Pressure Switch/Tamper Proof. This compact and versatile pressure switch with built to order set points is fully tamper proof. Excellent set point stability and vibration resistant design for weather proof application. Enclosure 3.

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Series Pressure Switch/Tamper Proof. Designed for high pressure pneumatic or low impulse hydraulic applications requiring a narrow deadband. Suited to weather proof application. Enclosure 3.

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Series Pressure/Internal Switch (Weather Proof) is a compact adjustable pressure switch for high pressure pneumatic and low impulse hydraulic process applications. Enclosure 3.

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Series Pressure/Vacuum Switch is a compact versatile pressure/vacuum switch is suitable for numerous applications serving low to mid-range pressure applications. Enclosure 3.

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Series Pressure Switch/Internal Adjustment. Compact adjustable switch for pneumatic or low impulse hydraulic process applications. Excellent set point stability and vibration resistance. Enclosure 3.

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Series Ultra Low Vacuum/Pressure Switch. Ultra low pressure and vacuum to pressure crossover (142P) and features many applications with a wide range of internal wetted materials that replace the necessity for diaphragm seals. Enclosure 3.

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Series Pressure Switch/Internal Adjustment. 200P (piston sensor) is for hydraulic system pressures up to 10,000 psig. Enclosure 3.

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Series Pressure Switch/Tamper Proof. Incorporates a sealed piston sensor for high impulse hydraulic applications. Suited to weather proof application. Enclosure 3.

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Series Pressure Switch/Internal Adjustment. Compact, adjustable pressure switch for high pressure hydraulic process applications. Enclosure 3.

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Series Pressure Switch/Internal Adjustment. Compact adjustable switch for high pressure hydraulic process applications. Excellent set point stability and vibration resistance. Enclosure 3.

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Series Pressure Switch/Internal Adjustment. The 100P7 is designed for use in hazardous areas. Applications include pneumatic and low impulse hydraulics up to 3,000 psig. Enclosure 7.

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Series Pressure Switch/Internal Adjustment. The 100P (diaphragm sensor) is for pneumatic and low impulse hydraulics up to 3,000 psig. Enclosure 6.

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Series Pressure Switch/Internal Adjustment - This unit has been designed for Division 2 explosion proof environments. Enclosure 5.

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Series Pressure Switch/Internal Adjustment - This explosion-proof hermetically-sealed switch is designed for low pressure applications. Enclosure 6.

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Series Flanged Pressure Switch/Diaphragm Sensor. Flanged construction is to accommodate corrosive viscous media. Redundant seals with venting between is for alarm or indication. Enclosure 6.

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Series Pressure Switch/Tamper Proof. This compact and versatile pressure switch with built to order set points is fully tamper proof. Excellent set point stability and vibration resistant design for explosion proof applications. Enclosure 6. [I/O Instruction Sheet.]

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Series Pressure Switch/Internal Adjustment. Compact adjustable switch for low to mid range process applications. Excellent set point stability and vibration resistance. Explosion proof electrical makes this switch ideal for chemical process applications. Enclosure 6.

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Pressure Switch/Internal Adjustment. Compact adjustable switch for low to mid range pressures. Excellent set point stability and vibration resistance. The flush mount (welded diaphragm) process connection offers suitability for viscous process applications. Enclosure 6.

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Series Pressure Switch/Tamper Proof. Designed for high pressure pneumatic or low impulse hydraulic applications requiring a narrow deadband in explosion proof applications. Suited for corrosive or hazardous environments. Enclosure 6.

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Series Pressure/Tamper Resistant is a compact versatile pressure switch is suitable for numerous applications serving low to mid-range pressure applications. Enclosure 6.

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Series Pressure/Internal Switch (Explosion Proof, Hermetically Sealed) is a compact adjustable pressure switch for pneumatic and low impulse hydraulic process applications. The 131P series pressure switch also has a selectable deadband feature which can be preset to fit most any application. Enclosure 6.

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Series Pressure Switch/Internal Adjustment. Compact adjustable switch for low to mid-range process applications. Excellent set point stability and vibration resistance. Ideal for hazardous and corrosive media environments. Enclosure 6.

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Series Pressure Switch/Internal Adjustment. 200P (piston sensor) is for hydraulic system pressures up to 10,000 psig. Enclosure 6.

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Series Pressure Switch/Tamper Proof. Incorporates a sealed piston sensor for high impulse hydraulic applications. Suited for corrosive or hazardous environments. Enclosure 6.

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Series Pressure Switch/Internal Adjustment. Compact, adjustable pressure switch for high pressure hydraulic process applications. Enclosure 6.

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Series Pressure Switch/Internal Adjustment. Compact adjustable switch for high pressure hydraulic process applications. Excellent set point stability and vibration resistance. Ideal for hazardous and corrosive media environments. Enclosure 6.

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