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Mite 85 Snap-acting 3-way valve with two trip points

Mite 85 Snap-acting 3-way valve with two trip points

Product catalog summary

Overview
The Dahl Mite Series of pneumatic relays are compact, rugged, and precise devices designed for high-density applications in industries such as petroleum, chemical, gas-field, and pharmaceuticals. These relays are engineered to switch, lock, or vent various ports based on pneumatic signals, providing reliable and long-term performance.

Specifications
- Pressure Rating: Mite 70, 71, 73, 74, 85 have a maximum pressure rating of 100 psig, while Mite 71L/71H can handle up to 120 psig.
- Temperature Limits: -40°F to +180°F.
- Port Sizes: Tapped for 1/4” NPT with 1/8” internal ports.
- Materials: Constructed from aluminum, plated steel, neoprene, brass, and stainless steel.

Product Descriptions

Mite 70: A snap-acting control relay with manual reset, designed to trip on increasing or decreasing control signals, venting one port while locking another.
Super Mite 71L/71H: A high or low pass pneumatic selecting relay that automatically selects the higher or lower of two input signals.
Mite 73: Similar to Mite 70, it can accept up to four inputs and is capable of automatic reset.
Mite 74: Combines Mite 70 with a precision 2-way or 3-way valve, allowing for versatile signal channeling.
Mite 85: Features a 3-way valve with two adjustable trip points, allowing for reversible and repeatable switching without manual reset.

Applications
- Actuating on-off valves based on control signal changes.
- Switching to secondary controllers upon primary system failure.
- Setting pneumatic pressure limits within a control signal range.

Warranty
ControlAir, Inc. provides an 18-month warranty against defects in materials and workmanship, with options for repair, refund, or replacement.

Catalog excerpts

Mite 85 Snap-acting 3-way valve with two trip points-1

The Dahl Mite Series of pneumaticrelays offer precise control of air orgas service. Their snap-acting design automatically trips on eitheran increasing or decreasing signal.Mites are rugged, compact unitsengineered for high densityapplications. They are constructed to last and make decisionsӔ withcrisp precision, cycle after cycle. > Trips to vent one control signalwhile simultaneously locking upanother > Automatically selects the higher orlower of two input signals > Accepts up to four inputs and canbe reset automatically > Combines a Mite 70 with aprecision 3-way or 2-way valve > Our most versatile circuitry forsophisticated applications >

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Mite 85 Snap-acting 3-way valve with two trip points-2

Mite 70Mite 71L/71HMite 73Mite 74Mite 85 Pressure Rating 100 psig max.120 psig max. Temp. Limits -40˚F to +180˚F Port Sizes Tapped for 1/4 NPT with 1/8Ԕ internal ports Dimensions 2.5 Dia. x 3.5Ԕ3.375 Dia. x 2.5Ԕ2.5 Dia. x 4.25Ԕ2.5 Dia. x 5ԔSee Drawing Materials Aluminum, Plated Steel, Neoprene, Brass and Stainless Steel HIGH ABCD 3.375" A Variable Instrument Air Signal B Signal Output (Locks up when tripped) 2.5" .25" NPTHIGHLOWLOW .25" NPT C Signal Output (Vents when tripped) D Remote Pneumatic Trip >

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Mite 85 Snap-acting 3-way valve with two trip points-3

ABFCE D ABCGHI D C A Variable Instrument Air Signal B Signal Output (Locks up when tripped) C Signal Output (Vents when tripped) A Variable Instrument Air Signal D Remote Pneumatic Trip B Signal Output (Locks up when tripped) E Remote Pneumatic Reset C Signal Output (Vents when tripped) F Pneumatically Nullifies E D Remote Pneumatic Trip G Trip to Open H Common I Trip to Close > Set 2 pneumatic pressure limits(high and low) within the range of a control signal, i.e., a doublepneumatic stop. Output fromMite 71H must stay within 5 to 15 psig when connected as shown. Output from Mite 71L to valve...

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