Ansi Engineers

Danfoss KP & RT Pressure Switches – Product Details & Specifications 1. Danfoss KP Series Pressure Switches

Danfoss KP series pressure switches are designed primarily for refrigeration and air-conditioning systems to provide reliable control and safety protection. They’re widely used to protect against excessively low suction pressure and overly high discharge pressure, and to control compressors and fans.

🌟 Key Features

✔ Designed for refrigeration & AC applications
✔ Single-Pole Double Throw (SPDT) switch operation
✔ Snap-action contact for rapid switching and reduced wear
✔ Compact, vibration-resistant design
✔ Enclosures available in IP30, IP44, and IP55 ratings
✔ Manual or automatic reset type variants
✔ Fully welded bellows pressure element for enhanced reliability

🔧 Typical Specifications

• Switch Type: SPDT single-pole changeover

• Pressure Ranges: Typical regulating ranges from low to high pressures (e.g., 8–32 bar) depending on model variant

• Differential: Adjustable depending on model

• Contact Ratings: Up to 16 A @ 400 VAC, 12 W @ 220 VDC

• Ambient Temperature: –40 °C to +65 °C (approx.)

• Max Working Pressure: Up to ~35 bar (model dependent)

• Pressure Connection: Flare or threaded type (e.g., 1/4″)

• Danfoss RT Series Pressure Switches

  Danfoss RT series pressure switches are robust switches for general industrial applications, including marine refrigeration, steam boiler safety, and process control industries. The series includes standard pressure switches, differential pressure switches, and variants designed for specific control functions such as neutral zone regulation.

  🌟 Key Features

  ✔ Simple, reliable mechanical design
  ✔ SPDT contact — changes state based on set pressure value
  ✔ Available for both general industrial and marine uses
  ✔ Differential and neutral zone options available
  ✔ Special versions with gold-plated contacts for PLC signal applications
  ✔ Fail-safe and high-reliability options recommended for critical applications
  ✔ Safety Integrity Level (SIL 2) available on selected products

  🔧 Typical Specifications

  • Contact Type: Single-pole changeover (SPDT)

  • Regulation Range: Example ranges from –1 to several tens of bar depending on model

  • Enclosure Rating: Up to IP66 for industrial protection

  • Reset Functions: Auto, Min or Max reset options

  • Media Range: Can handle broad application pressure ranges

  🧰 Benefits

  ✔ Suitable for both AC and DC applications
  ✔ High repeatability and stable switch performance
  ✔ Optional gold-plated contacts for electronic interface reliability
  ✔ Replaceable contact systems
  ✔ Marine approvals available for harsh environments

  How They Differ

  Feature / Series	KP Series	RT Series
  Primary Use	Refrigeration & AC systems	Industrial & marine applications
  Contact Type	SPDT switch	SPDT switch
  Special Options	Manual/Auto reset, bellows element	Differential versions, gold-plated contacts
  Enclosure Ratings	IP30 / IP44 / IP55	IP54 / IP66
  Safety Levels	General industrial controls	Some with SIL 2 capability

The PS series mechanical differential pressure switches offer a
cost-effective solution for filter, fan and duct pressure monitor-ing in building automation systems in the HVAC/R industry. PS
series products offer field selectable switching point adjustmentand measurement units in Pa.PS series devices are commonly used in HVAC/R systems for:• fan, blower and filter monitoring• pressure and flow monitoring• valve and damper monitoring

Orion Instruments offers a comprehensive suite of electrical and process switches, encompassing high-accuracy pressure switches, flameproof variants for hazardous locations, OEM-compatible modules, and industrial grade control switches. Designed for reliability and long wear in critical industrial environments, these products are widely used in process automation, safety interlocks, and pressure monitoring systems.Compact Switches

Compact electrical switches designed for general-purpose automation and OEM installations.

• Robust construction with corrosion-resistant materials

• Cost-effective and reliable for medium-duty applications

• Includes vacuum switches, hygiene range pressure switches, and high range series versions

🔹 Industrial Switches

Heavy-duty switches for industrial process control:

• MD Low Range Differential Switches – Diaphragm pressure switches with ±1 % FSR accuracy, IP66 housing, and SPDT/DPDT contacts. Ideal for boilers, compressors, hydraulics, and process industry installations.

• MT High Range Pressure & Vacuum Switches – Durable switches with varied sensing capsules to match application media, offering accurate pressure detection under harsh conditions.

🔹 OEM Pressure Switches

Versatile pressure switches suitable for OEM equipment and panel-mount applications:

• KU High Range Pressure Switch – Low cost solution with SS/Teflon wetted parts, ¼″ BSPF pressure port, and SPDT contacts.

• SA High Range Series Pressure Switch – Compact and lightweight with good repeat accuracy and options for wet parts to match working media.

• EZ/EX Series Pressure Switch – Panel mount pressure switch with adjustable switching points and multiple electrical rating options.

• SM & CF Series – Additional OEM switch variants for specific pressure ranges and application needs.

🔹 Flameproof Pressure Switches

Approved and certified for hazardous areas, these are built to operate safely in explosive atmospheres:

• High range pressure switches with flameproof enclosures

• Compound pressure switches and vacuum versions

• Suitable for oil & gas, chemical, petrochemical, and refinery installations where explosion protection is required.

🔹 Process Switches

Switches designed for outdoor mounting and industrial environments:

• Rugged polycarbonate + stainless steel combination housing

• Narrow deadband, clear scale indication, and stable repeatability

• Suitable for water treatment, compressor systems, and general process control.

📌 General Product Features

✔ High Accuracy & Reliability: Precision switching with tight repeatability for consistent process control and safety.
✔ Robust Construction: Industrial grade enclosures (IP66 & higher) built for harsh environments.
✔ Versatile Electrical Contacts: SPDT, DPDT, hermetically sealed or gold plated microswitches depending on model.
✔ Multiple Mounting & Port Options: Standard ¼″ BSP/F pressure connections with optional flanges, seals and other process attachments.
✔ Wide Application Range: From boiler safety systems and compressors to petrochemical plants, power generation, water treatment, and manufacturing industries.

🏭 Typical Application Areas

• Power Plants & Generators

• Boilers & Compressors

• Chemical & Petrochemical Plants

• HVAC & Refrigeration Systems and others