Solenoids for Use in Hazardous Locations

A manufacturer wanted its heavy-duty paint sprayers to automatically stop pumping when they ran out of paint. The solution needed to prevent ignition of the atomized paint.

Customer Problem

When a pump in a fluid handling system loses liquid, it can overspeed, resulting in damage that can greatly reduce the life of the pump. A manufacturer wanted to eliminate this issue in its heavy-duty paint sprayers by automatically stopping the pump when the paint reservoir ran out of paint. Since atomized paint is flammable, the solution needed to take precautions against fire and explosion.

The TLX Solution

TLX designed an intrinsically safe high-speed latching solenoid, which used energy-limiting circuitry to keep the solenoid’s electrical output below the threshold for ignition. At the beginning of an overspeed condition, the solenoid’s plunger immediately extended to stop the pump so that no damage could occur. The latching solenoid used only a short pulse of current to extend the plunger and drew no current to maintain position.

View Design Solution

Intrinsically Safe Latching Solenoid

Stroke: 3.05 mm

Supply voltage: 6, 12 or 24 Vdc

Response time: 17-26 ms

Operating temperature range: -40°C to 60°C

Operating voltage: 6.8-7.8 Vdc

Coil resistance at 20°C: 13.0 ± .5 Ω

Inductance @ 1 kHz: 26 mH max

Net spring preload: 2.9 N min

All TLX components are customized to fit system requirements, meaning technical specifications are unique to each customer and design. Examples given on our website are for illustration purposes only.

Working with TLX

Experienced partner of industry leaders, first-tier suppliers, and OEMs
Direct access to our design and engineering team
Localized production in USA and China
Dependable single-source solution from design to delivery

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Our Process

Step 1 / Initial Review

Our engineering team works directly with you to determine the viability of your program and identify the best solution based on your specifications.

Step 2 / Quote

Quotes include all costs related to your project - tooling, prototype, piece part, production and project specific costs.

Step 3 / Design Review & Prototypes

Our engineering team reviews the design with you and makes any adjustments needed. Prototypes are built according to design specifications for testing.