Titan part 800-910 is a bypass valve seat used in the pump fluid section of compatible airless sprayers and stripers. This precision seat works with the bypass valve piston to regulate pressure recirculation when the spray gun is triggered off. A worn or pitted valve seat can cause pressure loss, erratic spraying, or failure to build pressure. Replacing the seat restores proper sealing and consistent spray performance.
| Part Number | 800-910 |
|---|---|
| Part Description | Bypass Valve Seat |
| Brand | Titan |
| Fits |
|
| Condition | New |
The Titan 800-910 Bypass Valve Seat is a critical sealing component inside the pump fluid section. It works together with the bypass valve piston to direct paint flow back to the inlet when the spray gun trigger is released, preventing pressure buildup and recirculating material. When the gun is triggered, the valve closes to send full pressure to the tip.
Over time, the valve seat can become pitted, scratched, or worn from abrasives in paint or normal cycling. A damaged seat causes bypass valve leakage, resulting in pressure loss, surging spray pattern, or the pump failing to reach operating pressure. Replacing the seat (often as part of a pump repair kit) restores positive sealing and consistent output.
| Seals bypass port | Prevents paint from recirculating when gun is triggered |
|---|---|
| Pressure regulation | Helps maintain steady pressure during spraying |
| Gun‑off recirculation | Allows paint to flow back to tank when gun is closed |
| Component protection | Reduces wear on pump from dead‑heading |
| Pressure loss / surging | Pressure drops when gun is triggered or fluctuates |
|---|---|
| Pump won't build pressure | Pressure never reaches cutoff setting |
| Excessive tip wear / spitting | Irregular spray pattern from bypass leakage |
| Visible seat damage | Pitting, scoring, or grooves on sealing surface |
Titan part 800-910 is a direct replacement bypass valve seat for the following models. Always verify with your machine's parts diagram.
| Model | Component |
|---|---|
| RentSpray 700 | Bypass valve seat |
| ProMark II (Model No 759-2010) | Bypass valve seat |
| PowrLiner 2800 | Bypass valve seat |
| Performer 1140IX | Bypass valve seat |
| Airless Sprayer 840I | Bypass valve seat |
| Airless Sprayer 1140IX | Bypass valve seat |
| Airless Sprayer 1140I | Bypass valve seat |
| Airless Sprayer 840IX | Bypass valve seat |
| Airless Sprayer 740IX | Bypass valve seat |
| Airless Sprayer 740I | Bypass valve seat |
When replacing the bypass valve seat, inspect or replace these associated components.
The mating surface may also be worn; replace as a set for best results.
A weak spring can cause premature bypass opening.
Replace all O‑rings in the bypass valve assembly to prevent new leaks.
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