Part number 138499 is a Red Handle Bypass Valve. This manually operated valve allows fluid to recirculate within the pump system, providing pressure relief and enabling priming, flushing, and system maintenance without requiring operation of the spray gun.
| Part Number | 138499 |
|---|---|
| Part Description | Red handle bypass valve |
| Fits | Helix VR; Helix FR |
| Condition | New |
Part number 138499 is the Red Handle Bypass Valve, a manually operated fluid control component mounted on compatible Helix pump systems. This valve provides a critical safety and operational function by creating an alternative path for fluid flow. When opened, it diverts pressurized fluid from the outlet side of the pump back to the inlet or material supply, bypassing the spray gun.
The bypass valve is essential for several pump operations. During startup, opening the valve allows air and solvent to be purged from the system without building pressure at the gun. During flushing, it enables cleaning fluid to circulate through the pump for efficient solvent recovery. In the event of a gun blockage or when the gun is not in use, the valve can be opened to relieve system pressure safely.
The distinctive red handle provides immediate visual identification of this critical safety component. Over time, the valve can develop leaks through the stem seal, the handle can become damaged or broken, or internal wear can prevent the valve from sealing completely when closed. A faulty bypass valve can cause pressure loss during spraying or create a safety hazard if it cannot be opened to relieve pressure.
| Pressure Relief | Allows safe reduction of system pressure without triggering the spray gun |
|---|---|
| Priming and Flushing | Enables circulation of fluid through the pump for startup and cleaning |
| Flow Diversion | Recirculates material back to supply during maintenance or idle periods |
| External Leakage | Fluid seeps from the valve stem, body, or connection points |
|---|---|
| Handle Damage | Red handle is cracked, broken, or missing, making valve operation difficult |
| Internal Bypass | Valve fails to seal when closed, causing pressure loss during spraying |
| Stiff Operation | Handle is difficult to turn or requires excessive force |
Part number 138499 is specifically designed for the Helix VR and Helix FR series pumps. This bypass valve assembly is a model-specific component. Always confirm fitment using the correct parts diagram for your exact pump model and serial number.
| Compatible Models | Component |
|---|---|
| Helix VR | Red handle bypass valve |
| Helix FR |
The bypass valve is part of the pump's fluid control system. When servicing this component, these related parts are often inspected or replaced at the same time.
Contains replacement O-rings and seals for the valve stem and body. If the valve body is in good condition, a seal kit may be available.
The bypass valve often mounts to or integrates with the prime/spray manifold. Inspect this component for damage or wear.
The hose that carries bypassed fluid back to the supply should be checked for cracks, kinks, or deterioration.
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