Impact part 805-351A is an inlet valve designed to control the flow of material into the pump on compatible Impact sprayer models. This one-way valve allows material to enter the pump chamber during the suction stroke while preventing backflow during the pressure stroke. Replacing a worn, leaking, or damaged inlet valve restores proper pump priming and ensures consistent pressure and flow.
| Part Number | 805-351A |
|---|---|
| Part Description | Inlet Valve |
| Brand | Impact |
| Fits | Impact 340, 400, 440, 640, 640 I and IA, X440, X540 I |
| Condition | New |
The 805-351A Inlet Valve is a critical one-way valve that controls the flow of material into the pump on compatible Impact sprayer models. It allows material to enter the pump chamber during the suction stroke while preventing backflow during the pressure stroke, ensuring efficient pump operation.
The inlet valve works in conjunction with the outlet valve to create the pumping action. During the suction stroke, the inlet valve opens to draw material into the pump chamber. During the pressure stroke, the inlet valve closes tightly to prevent material from being pushed back out through the inlet. Over time, inlet valves can become worn at the sealing surfaces, clogged with debris, or weakened in their spring action. A worn or leaking inlet valve can cause poor priming, reduced pressure, and inconsistent flow. Replacing the inlet valve restores proper one-way flow control and ensures reliable pump performance.
| One-way flow control | Allows material in, prevents backflow out |
|---|---|
| Priming assistance | Helps the pump draw material from the supply |
| Pressure maintenance | Prevents pressure loss through the inlet during the pressure stroke |
| Poor priming | Pump struggles to draw material |
|---|---|
| Pressure loss | Pressure drops during operation |
| Visible wear | Valve seat or sealing surface damaged |
| Backflow | Material pushes back through inlet during pressure stroke |
Impact part 805-351A is compatible with the following sprayer models. Always verify fitment using your equipment's parts diagram before ordering.
| Model | Component |
|---|---|
| Impact 340 | Inlet Valve |
| Impact 400 | Inlet Valve |
| Impact 440 | Inlet Valve |
| Impact 640 | Inlet Valve |
| Impact 640 I | Inlet Valve |
| Impact 640 IA | Inlet Valve |
| Impact X440 | Inlet Valve |
| Impact X540 I | Inlet Valve |
When replacing the inlet valve, these associated components are often inspected or replaced at the same time.
The companion valve that controls material exiting the pump; often replaced as a pair.
Sealing surfaces that work with the valve; replace if damaged.
Clean or replace the filter protecting the inlet valve from debris.
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