Part number 138411 is a Cage Inlet with a 3/4" Ball, used as a primary fluid intake valve on compatible pump models. This assembly typically includes a ball, cage, and seat to create a one-way check valve, allowing material to be drawn into the pump chamber while preventing backflow. It is a critical component for maintaining pump prime and efficient suction.
| Part Number | 138411 |
|---|---|
| Part Description | Cage Inlet 3/4" Ball |
| Fits | Helix VR; Helix FR |
| Condition | New |
Part number 138411 is a Cage Inlet valve assembly featuring a 3/4" ball. This component acts as the inlet check valve on compatible piston pumps. During the pump's suction stroke, the ball lifts off its seat, allowing fluid to enter the pump chamber. On the pressure stroke, the ball seals against the seat to prevent fluid from flowing backward, ensuring efficient pumping action.
A worn, cracked, or fouled cage inlet can cause loss of prime, reduced pressure, erratic spray performance, or fluid leakage back into the supply. Replacing this assembly restores proper check valve function and reliable pump operation.
| Check Valve Function | Allows one-way fluid flow into the pump chamber |
|---|---|
| Maintains Prime | Seals on the pressure stroke to keep the pump chamber full |
| Suction Efficiency | Enables the pump to draw material effectively from the supply |
| Loss of Prime | Pump repeatedly loses prime or will not hold prime |
|---|---|
| Reduced Pressure/Flow | Inability to reach normal pressure due to internal leakage |
| Visible Damage | Cracked cage, worn or pitted ball, or damaged seat |
| Debris Fouling | Valve is chronically clogged or scored by abrasive material |
Part number 138411 is designed for use in Helix VR and Helix FR series pumps. Always confirm fitment using the correct parts diagram for your exact pump model and serial number.
| Compatible Models | Component |
|---|---|
| Helix VR | Cage Inlet 3/4" Ball |
| Helix FR |
The inlet valve is part of the pump's fluid section. For a complete service, these components are often inspected or replaced as a set.
The outlet (discharge) check valve works in tandem with the inlet valve. Both are typically serviced together for balanced performance.
Worn packing can allow fluid to bypass the piston, contributing to pressure loss that may mimic inlet valve failure.
A clogged suction foot valve or leaking suction tube can also cause prime loss and should be checked.
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