Product Overview

The Robertshaw RX-19-36 is a millivolt-type operating thermostat for commercial gas fryers with a temperature control range of 250F to 375F (approximately 121C to 190C). It features a 36 inch capillary and a 3/8 inch diameter bulb fitted with a 1/4 inch NPT stuffing gland. This thermostat is particularly common in Falcon fryer ranges and provides reliable, snap-acting temperature regulation to maintain consistent oil temperature during continuous frying service. The Falcon part reference for this thermostat is 537320120.

Technical Specifications

• Type: Millivolt operating thermostat
• Temperature Range: 250F to 375F (121C to 190C)
• Capillary Length: 36 inches (914mm)
• Bulb Diameter: 3/8 inch
• Bulb Length: 3-3/8 inch
• Tank Gland: 1/4 inch NPT
• Cross References: Falcon 537320120, Robertshaw RX-19-36
• Condition: New

Compatible Equipment

This thermostat is compatible with the following commercial catering equipment:

• Falcon — G1808, G1808X, G1830, G1838X, G1848, G1848X (serial number dependent - contact us to confirm)

Not sure if this fits your equipment? Contact us with your machine make, model and part number and we will confirm compatibility before you order.

Signs You Need To Replace This Part

• Fryer oil temperature drifts above or below the dialled position during service
• Burner cuts out early, leaving oil below working temperature
• Thermostat dial has no effect or feels loose and unresponsive
• Capillary shows kinking, corrosion, or oil leaking around the tank gland

Installation Notes

Drain and cool the fryer fully before starting. Note the wire connections before removing the old thermostat. Thread the 1/4 inch NPT stuffing gland, route the 36 inch capillary without kinking and allow a small service loop near the body. Position the 3/8 inch bulb so it does not contact the heat exchanger, then tighten the gland fully. Test for oil leaks before lighting the burner. This is a millivolt control — no mains supply is needed for the thermostat circuit itself. Always use a Gas Safe registered engineer for commercial gas appliance repairs in the UK.

Why Buy From LaunchCatering

• UK stock - ready for fast dispatch
• Trusted by professional kitchens since 2020
• Next day delivery available
• Commercial parts specialists
• Contact us if you need help finding the right part

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