Dwyer Instruments 530 | Air flow switch.
The Dwyer 530 air flow switch is a cost-effective paddle switch for commercial HVAC duct proving. It features a rugged die-cast body, corrosion-resistant stainless steel vane and SPDT snap switch, with a field-adjustable 400-1600 FPM trip range for ducts up to 6 inches in diameter. Genuine Dwyer Instruments stock at General Tech Services LLC, Saudi Arabia, with free Saudi Arabia shipping. Request a quote in under a minute - call +966 569 289 544.
Product Overview
Not every airflow-proving application requires electronic sensing. In many HVAC installations, the requirement is simply to confirm that a fan is moving air before a heater, damper or alarm is allowed to operate. The Dwyer 530 provides a straightforward mechanical solution for these applications.
Airflow deflects the corrosion-resistant stainless steel vane, which operates an SPDT snap switch when the air velocity reaches the selected trip point. The trip point can be adjusted in the field from 400 to 1600 FPM using the screw-type set-point adjustment, allowing one switch to accommodate different airflow requirements.
The Dwyer 530 features a durable die-cast body suitable for commercial HVAC installations, plant rooms and rooftop equipment. Two-screw mounting simplifies installation, while the design is suitable for ducts up to 6 inches in diameter.
Electrical wiring enters through a 7/8-inch conduit hole and connects to screw terminals. The SPDT snap switch is rated at 9.8 A full load at 125 VAC and 4.9 A full load at 250 VAC, with up to 15 A resistive at 125, 250 or 480 VAC.
For commercial air handling and fan-proving applications, the Dwyer 530 provides a practical mechanical airflow switch with an adjustable trip range and rugged construction.
Key Benefits
- Field-adjustable airflow trip point from 400 to 1600 FPM
- Rugged die-cast body for demanding HVAC installations
- Corrosion-resistant stainless steel airflow vane
- SPDT snap switch for control, interlock and alarm applications
- Up to 15 A resistive switching capacity
- Simple two-screw mounting
- Suitable for ducts up to 6 inches in diameter
- Screw-terminal electrical connection through a 7/8-inch conduit hole
- Practical solution for commercial HVAC fan proving
- Genuine Dwyer Instruments stock with free Saudi Arabia shipping
Call +966 569 289 544 for pricing and stock availability.
Who This Product Is Best For
- HVAC contractors needing a straightforward fan-proving switch
- Commercial air handling units and fresh-air fan installations
- Duct heater interlocks that require airflow confirmation
- Maintenance teams replacing existing mechanical paddle switches
- Smaller duct applications up to 6 inches in diameter
- Panel and controls contractors requiring an SPDT mechanical airflow switch
How to Use / How It Works
- Mount the Dwyer 530 to the duct using the two-screw mounting arrangement, with the vane correctly positioned in the airflow.
- Route the control cable through the 7/8-inch conduit hole and connect it to the SPDT screw terminals.
- Start the fan and adjust the screw-type set point until the switch operates at the required airflow velocity.
- Stop or reduce the airflow and confirm that the SPDT contact resets correctly.
- Verify the connected interlock, alarm or control circuit before placing the system into normal operation.
Frequently Asked Questions
What airflow range does the Dwyer 530 cover?
The Dwyer 530 has a field-adjustable trip range of 400 to 1600 FPM.
What size ducts does the Dwyer 530 fit?
The Dwyer 530 is designed for ducts up to 6 inches in diameter.
What type of switch does the Dwyer 530 use?
It uses an SPDT snap switch operated by a stainless steel airflow vane.
What is the electrical rating of the switch?
The SPDT snap switch is rated at 9.8 A full load at 125 VAC and 4.9 A full load at 250 VAC. It can handle up to 15 A resistive at 125, 250 or 480 VAC.
How is the Dwyer 530 mounted?
The switch uses a simple two-screw mounting arrangement on the duct.
Is the airflow trip point adjustable?
Yes. The trip point can be adjusted in the field across the 400-1600 FPM range using the screw-type set-point adjustment.
Should I choose the Dwyer 530 or the Dwyer AAFS?
The Dwyer 530 uses a die-cast body and covers 400-1600 FPM. The AAFS provides a wider 200-1800 FPM range and an IP65 ABS housing. The appropriate model depends on the airflow range and environmental requirements of the installation.
Is the Dwyer 530 suitable for fan proving?
Yes. The mechanical paddle and SPDT snap switch can be used to prove airflow and provide fan interlock or alarm signals in HVAC systems.
Do you ship the Dwyer 530 across Saudi Arabia?
Yes. Genuine Dwyer Instruments stock is available through General Tech Services LLC with free Saudi Arabia shipping. Call +966 569 289 544 for pricing and availability.
Request a Quote Today
Get the Dwyer 530 air flow switch delivered free anywhere in Saudi Arabia.
Call +966 569 289 544 | www.generaltechshop.sa
