Erdco Armor-Flo 3500 Flow Switch

Erdco Armor-Flo 3500 provides even more effective process control input with switching capabilities. Simple electromechanical switches define your process limits. Adjustable switches provide a positive indication of flow/no-flow conditions and may be positioned to actuate at specific flow rates.

The design of the switch is to capture the indicator, preventing movement until the flow rate is once again within the acceptable range. The switches are SPDT glass encapsulated reed type rated at 0.25 amperes at 120V ac (1.5 amperes at 24V dc). This switch is appropriate for use in Class 1, Division 2 areas.

Erdco Armor-Flo 3500 Features

• Instantaneous flow rate measurement.
• Adjustable low and/or high flow limit switches.
• Use in horizontal or vertical piping systems.
• Individually calibrated for fluid and operating conditions.
• User-selectable 10:1 turndown flow ranges.
• User-selectable units of measure.
• No floats to get stuck, tubes to break or dynamic seals to leak.
• Low-pressure loss.

Erdco Armor-Flo 3500 Applications

• Coolant monitoring
• Pump seals
• Chilled water
• Staging air compressors
• Lube oil systems

Specifications

Accuracy : ±2% full scale
Repeatability : ±1% full scale

Scales: Direct reading
Resolution: Maximum-30 division/Minimum-15 divisions

Rangeabiliy: 10 to 1 turndown

Switch/Type :

• Hermetically sealed reed switch Contact rating: 0.25A @ 120 Vac 1.5A @ 24V dc
• Adjustment limits: 20-50% full scale-low limit 50-90% full scale-high limit 30% differential between low and high
• Dead Band: 7% full scale

Materials of Construction :

• Housing: Aluminum, brass, 70/30 copper/nickel, 316 stainless steel
• Shunt: As housing or carbon steel
• Window: Tempered glass or polycarbonate
• Vane: Cobalt/chromium/nickel alloy with Teflon ® encapsulated magnet
• “O” rings: buna-n, ethylene propylene, Viton® or perfluoro elastomer

Piping Connections :

• ¹/₂” to 1″ NPT female
• 1 ¹/₄” to 4″ NPT male
• 1 ¹/₂” to 3″ Tri-clamp
• 1 ¹/₄” to 6″ Grooved
• 1 ¹/₄” to 6″ Beveled
• ¹/₂” to 8″ 150# /300# RF/FF ANSI Flanges (carbon stl)
• ¹/₂” to 8″ 150# RF ANSI Flanges (stainless stl)
• ¹/₂” to 6″ 150# RF ANSI Flanges (aluminum)
• ¹/₂” to 6″ 150# FF ANSI Flanges (brass)
• 15 to 25 mm DIN 2999/BS21/ISO R7 Female threaded
• 15 to 150 mm DIN PN 10 Flanges (316 stainless stl & carbon stl)

Pressure Limits :

• 1 Housing (aluminum) 0, 1 or 5 Shunt-200 psig (13.8 bar)
• 2 Housing (brass) 0 Shunt-400 psig (27.6 bar) 2 or 5 Shunt-200 psig (13.8 bar)
• 6 Housing (316 stainless stl) 0 Shunt-400 psig (27.6 bar) 5 or 6 Shunt-200 psig (13.8 bar)
• 7 or 8 Shunt-400 psig (27.6 bar)
• 8 Housing (high pressure 316 stainless stl) 0 Shunt-1000 psig (69 bar)

Temperature Limits :

• -23 to 121°C (-10 to 250°F) with buna-n o-ring
• -23 to 204°C (-10 to 400°F) with Viton®, Kalrez® or ethylene propylene o-ring

Download Datasheet : Erdco Armor-FloTM 3500

Reference: erdco.com

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