Part number 0138638A is a Heater Block used in compatible fluid heating systems. This component transfers heat from the heating element to the circulating material, reducing viscosity and improving sprayability for high-solids or temperature-sensitive coatings.
| Part Number | 0138638A |
|---|---|
| Part Description | Heater Block |
| Fits | Helix VR; Helix FR |
| Condition | New |
Part number 0138638A is a Heater Block, a precision-machined metal component that forms the core of the fluid heating system on compatible Helix VR and FR sprayer models. This block is designed with internal fluid passages that route material through a carefully engineered path, maximizing surface contact with the heated walls of the block. The heater element is inserted directly into the block, transferring thermal energy efficiently to the circulating material.
Heated spray systems offer significant advantages when applying high-viscosity materials such as heavy-bodied paints, plural component coatings, epoxies, and urethanes. Raising the temperature of these materials reduces their viscosity without the need for thinning solvents, allowing them to atomize properly at lower fluid pressures. This results in a finer finish, reduced solvent emissions, faster curing times, and improved film build control.
The heater block is subjected to extreme thermal cycling, continuous fluid flow, and potential chemical attack. Failure modes include internal fluid passage erosion or clogging from material buildup, corrosion or pitting from aggressive solvents, stress cracking from repeated heating and cooling cycles, and degradation of the element interface surface. A compromised heater block can cause uneven heating, reduced thermal efficiency, material leakage, or complete system failure.
| Heat Transfer | Conducts thermal energy from the heating element to the circulating fluid |
|---|---|
| Viscosity Reduction | Lowers material resistance to improve atomization and flow characteristics |
| Fluid Containment | Maintains pressurized fluid within a sealed, heated passage system |
| External Leakage | Fluid seeps from heater block body, element bore, or threaded connections |
|---|---|
| Inefficient Heating | System struggles to reach set temperature or heats slowly despite functional element |
| Internal Erosion/Corrosion | Fluid passages are worn, pitted, or scaled, reducing flow and heat transfer |
| Physical Damage | Block is cracked, has stripped threads, or damaged mounting surfaces |
Part number 0138638A is specifically designed for the heated fluid systems on Helix VR and Helix FR series pumps. This heater block is a model-specific component engineered for these particular heated sprayer systems. Always confirm fitment using the correct parts diagram for your exact model and serial number.
| Compatible Models | Component |
|---|---|
| Helix VR | Heater Block |
| Helix FR |
The heater block is the central component of the fluid heating system. When servicing this component, these related parts are often inspected or replaced at the same time to ensure complete system reliability.
The electrical heating element inserts into the block. These elements have a finite lifespan and should be replaced if the system is not heating adequately.
The thermocouple or RTD that monitors fluid temperature. An inaccurate sensor will prevent proper temperature control.
O-rings and gaskets that seal the element, sensor, and fluid connections should be replaced whenever the block is serviced.
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