Air System Products Robo-Drain w/Test Button (RD11-LP)

RD11-LP Robo-Drain – External Pneumatic, Low-Pressure (40 PSI) Condensate Drain

The RD11-LP Robo-Drain is a fully automatic, zero-loss condensate drain that protects compressed-air systems without electricity. It delivers the same robust performance as the RD11-T, but uses low-pressure control air (40 PSI) to actuate the valve—perfect where only low pilot air is available. A translucent reservoir gives quick visual confirmation, and it pairs well with oil/water separators to stay compliant and keep your system efficient.

RD11-LP Specifications

• Inlets: (2) 3/4" NPT (BSPP available)
• Outlet: 1/2" NPT (BSPP available)
• Control Air (Power): Clean, dry compressed air, 40 PSI nominal (Low Pressure)
• Operating Line Pressure Range: 0–250 PSI
• Operating Temperature: 32°–180°F
• Discharge Volume: 24 oz per cycle
• Weight: 17 lb
• Orientation: Horizontal, low-profile

Key Features

• Zero-loss, fully automatic operation—no manual draining
• Low-pressure (40 PSI) control-air actuation
• Isolated trigger assembly for dependable, repeatable cycling
• Non-clogging, full-port drain valve handles rust/scale
• Translucent reservoir for fast, at-a-glance checks
• Heavy-duty, industrial construction for long service life
• NPT or BSPP connections for flexible installation
• Low-profile body fits under tight skids and receivers

Benefits

• Ideal where only low pilot-air pressure is available
• Reliable, contamination-resistant design reduces nuisance failures
• One unit can serve multiple points, cutting air loss and operating cost
• Quick-check reservoir simplifies maintenance
• Installs easily in confined spaces; no wiring required
• On-demand operation prevents unnecessary cycling

How It Works

Condensate enters through either 3/4" inlet. As the reservoir fills, a stainless-steel float lifts to a preset level and signals the magnetic trigger. The trigger routes 40 PSI control air to the actuator, opening the full-port drain valve to discharge condensate. When the reservoir empties, the float drops, the control air is shut off, and the valve closes—returning the unit to collection mode with zero loss of compressed air.

Construction Materials

• Reservoir: Aluminum & composite
• Valve: Bronze with stainless-steel ball and stem
• Float: Stainless steel
• Seat: Stainless steel
• Seals: Viton®

Bottom line: the RD11-LP delivers the proven Robo-Drain performance you expect, with a low-pressure (40 PSI) control-air requirement that makes installation simpler and more flexible in real-world plants.