RobertshawKnobs, Handles & Wheels for HVACR Equipment

Robertshaw Knob: Mfr Part # 4590-188

Robertshaw Knobs, Handles & Wheels for HVACR Equipment. Specifications: Product Type: Dial.

SKU 3G-OTH-74706

Also listed as: 4590188 · 4590 188

Brand

Robertshaw

Item

Knob: Mfr Part # 4590-188

Local availability & support

Delivery: Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment: Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

Robertshaw

Manufacturer Part Number

4590-188 

Product Type

Dial 

Technical Documents

No technical documents available for this product.

Request documentation →

Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.

Talk to an engineer

Ask a question

Robertshaw Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

Robertshaw Knobs, Handles & Wheels for HVACR Equipment. Specifications: Product Type: Dial.

Frequently Asked Questions

What is the Robertshaw 4590-188 knob used for?

The Robertshaw 4590-188 is a dial knob designed for HVACR equipment. It is commonly used as a replacement or original component on temperature controls, thermostats, and gas valves to provide precise manual adjustment of settings in commercial and industrial heating and refrigeration systems.

What are the specifications of the Robertshaw 4590-188 knob?

The Robertshaw 4590-188 is a dial-type knob with manufacturer part number 4590-188. It is classified under knobs, handles, and wheels for HVACR equipment. The product type is Dial, and it is designed for use with Robertshaw controls and compatible HVACR systems.

Where to buy the Robertshaw 4590-188 knob worldwide?

You can source the Robertshaw 4590-188 knob from 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine Robertshaw components for HVACR applications.

How to install the Robertshaw 4590-188 dial knob?

To install the Robertshaw 4590-188 dial knob, align the knob's D-shaped or splined shaft opening with the control stem and press firmly until seated. Ensure the set screw (if present) is tightened against the stem's flat surface. Always verify free rotation and proper indexing before energizing the system.

Used in

Common applications for Robertshaw

Commercial HVAC — Robertshaw RS10420T digital WiFi thermostat for programmable heat and cool control in office buildings

Furnace ignition — Robertshaw 41-230 universal hot surface ignitor for silicon carbide replacement in residential and light commercial furnaces

Airflow monitoring — Robertshaw 2374-509 adjustable air pressure switch for draft sensing in industrial burner systems

Gas-fired equipment — Robertshaw 1820-009 universal pilot assembly with thermopile for natural gas or LP water heaters and boilers

Vibration protection — Robertshaw 366A0 mechanical vibration switch for pump and compressor monitoring in industrial plants

OEM replacement — Robertshaw 41-428N direct spark igniter for Trane HVAC equipment requiring silicon nitride ignitors

Robertshaw Products

3G Electric supplies Robertshaw knobs, handles & wheels for hvacr equipment. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

Browse all Robertshaw products →Contact our engineers →