ARAG Digital Valves

ARAG Digital Valves

ARAG 853 Digital Valve Specifications & Installation

The ARAG 853 series electric valves are designed for professional agricultural use as flow switches in systems under pressure

1. Technical & Performance Specs

  • Power Requirements: 12 Vdc at 3A

  • Operating Times: Ranges from 1.4 to 2.3 seconds for most models

    • Note: 3-way bottom connection models have longer actuation times of 2.8 to 4.6 seconds

  • Temperature Range: Designed for standard agricultural spraying environments

  • Tightening Torque for Bolts: 4 to 5 Nm (36 to 44 inch/lbs) depending on the specific model code

2. Maximum Operating Pressure

The pressure limit is determined by the lowest-rated coupling attached to the valve

  • Standard Threaded (1" to 1.5"): 10–12 bar (145–174 PSI)

  • 2" Couplings: 8 bar (116 PSI)

  • 3" Couplings: 5 bar (72 PSI)

  • Camlock Couplings: Typically limited to 10 bar (145 PSI)

3. Electrical Configuration (Wiring)

These valves can be configured for two different types of operation depending on your control system:

  • 3-Wire Operation: 12 Vdc power is always connected. A separate command wire triggers the valve to turn clockwise (Open/Close). Disconnecting that command wire causes the valve to turn counter-clockwise

  • 2-Wire Operation: Rotation is achieved by inverting the polarity of the power supply using a double switch

LED Status Indicators: The integrated LED identifies the status of the internal ball:

  • Red: Ball is in Position A

  • Yellow: Ball is in Position B

  • Off: No power supply or reversed polarity (in 3-wire mode)

[Image Placeholder: Wiring diagram for 2-wire vs 3-wire operation from Page 4]

4. Installation Safety

  • The "No Load" Rule: Do not operate the valve without liquid (no load) for long periods, as it may damage internal gaskets and cause the valve to block up

  • Foreign Bodies: Never insert hands or objects into the ball hole while the valve is powered; this can lead to crushing or amputation

  • Orientation: The geared motor can be rotated in 90° steps to fit your specific system layout

5. Maintenance

  • Flushing: Clean the interior of the valve whenever the entire system is cleaned

  • Seal Replacement: If the valve is opened for extraordinary cleaning or seal checks, the seal kit for that orifice must be replaced to ensure it remains leak-proof

  • Initial Test: After installation or maintenance, always pressure-test the system with clean water only before using chemicals

Troubleshooting the Digital Valve

FaultPossible CauseRemedy
Valve does not work

Lack of power or faulty cables.

Check all connections and harnesses; replace cables if needed.

Valve does not work

Supply voltage too low.

Verify that harnesses are suitable for the system and power is 12V.

Valve leaks

Foreign bodies or worn seals.

Remove debris from the ball or replace the seal kit.

Won't stop at preset point

Geared motor broken.

Replace the geared motor.