DA-531-3-6

The Mercoid Control DA-531-3-6 Vintage DA-531 Pressure Switch is a reliable and versatile device designed for use in various pressure applications. This pressure switch, with its vintage design, is not only functional but also adds a unique aesthetic appeal to any system.

The DA-531-3-6 model is a 3-6 PSI adjustable pressure switch, which means it can be set to activate at any pressure between 3 and 6 PSI. This makes it suitable for a wide range of applications, from small air compressors and water pumps to industrial systems requiring precise pressure control.

The switch is constructed of high-quality materials, with a brass body and stainless steel contacts to ensure durability and corrosion resistance. It features a set screw adjustment mechanism, which allows for easy and accurate pressure setting. The dial on the switch face displays the current pressure setting, making it simple to monitor and adjust as needed.

The Mercoid Control DA-531-3-6 Vintage DA-531 Pressure Switch operates on a normally open (NO) contact configuration. When the pressure in the system reaches the set point, the switch contacts close, allowing electrical current to flow through the circuit. This can be used to activate an alarm, turn on a pump, or perform any other desired function.

This pressure switch is suitable for use in various temperatures and environments, with a temperature range of -40 F to 257 F (-40 C to 125 C). It is also UL listed, ensuring compliance with recognized safety standards. The switch has a compact design, measuring 3 inches in length, 1.5 inches in width, and 1.5 inches in height, making it easy to install and integrate into various systems.

In conclusion, the Mercoid Control DA-531-3-6 Vintage DA-531 Pressure Switch is a high-performance and versatile device, perfect for applications requiring precise pressure control. Its vintage design not only enhances the look of any system but also adds a touch of nostalgia. Its durability, ease of use, and wide temperature range make it a reliable and convenient choice for various industries and applications.

The Mercoid Control DA-531-3-6 Vintage DA-531 Pressure Switch is a pneumatic pressure switch used in various industrial applications. Here are some pros and cons that might help you decide if this pressure switch is suitable for your needs:

1. Durable Construction: This pressure switch is built to withstand harsh industrial environments. It has a die-cast aluminum housing and a hermetically sealed contact system, which ensures long-lasting performance.

2. Versatile: The DA-531 pressure switch comes in various configurations, including normally open (NO), normally closed (NC), and changeover (CO). It can be used for a wide range of applications, such as water pressure systems, hydraulic systems, and pneumatic systems.

3. Easy to Install: This pressure switch is designed for easy installation. It has a standard 1/4 NPT threaded connection and can be mounted in various orientations, making it a convenient option for many applications.

4. Reliable: The DA-531 pressure switch is known for its reliability. It has a quick-acting diaphragm that responds quickly to pressure changes, ensuring accurate and consistent switching.

1. Limited Pressure Range: The DA-531 pressure switch has a relatively low maximum pressure rating of 6 psi. It might not be suitable for high-pressure applications.

2. Manual Reset: This pressure switch requires manual resetting after each actuation. It might not be the best option for applications where frequent resetting is required.

3. Limited Customization: The DA-531 pressure switch comes in a few standard configurations. It might not be customizable enough to meet the specific requirements of certain applications.

The Mercoid Control DA-531-3-6 Vintage DA-531 Pressure Switch is a reliable and durable option for various industrial applications with a low to medium pressure range. Its easy installation and versatility make it a convenient choice for many applications. However, its limited pressure range, manual reset, and lack of customization options might not make it suitable for all applications.

If you have a low to medium pressure application with standard requirements, the Mercoid Control DA-531-3-6 Vintage DA-531 Pressure Switch could be an excellent choice. However, if you require a high-pressure switch, frequent resetting, or customization options, you might want to consider other pressure switch models that better suit your specific needs.

Details:

For your consideration is a vintage Mercoid Control da-531 pressure switch that comes with its original instruction sheet which makes me think this an unused item.

specifications indusswitch:

• brand: Mercoid Control
• mpn: Da-531-3-6
• part type: Pressure Switch

seller indusswitch:

• city: davidsville, pennsylvania
• # reviews: 5105
• rating: 100.0%

returns indusswitch:

• policy: no returns

offer indusswitch:

• options: ship-to-home
• started: january 12, 2026
• prices: $39.99–$310.41
• item condition:
  • New
  • New – Open box
• in stock #: 2
• sold #: 13
• availability: in stock

payments indusswitch:

• credit card: mastercard
• other
• wallet: paypal

shipping indusswitch:

• class: standard, expedited
• carrier: usps
• service: usps ground advantage, usps priority mail
• type: calculated
• transit: 3-9 days

general indusswitch:

• category: Business & Industrial > Electrical Equipment Supplies > Control Switches

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