762-134 is a direct replacement for Titan part 509597, an upper valve seat used in the fluid section of numerous Titan airless sprayers. This seat works with the ball to form a one‑way seal, preventing backflow and maintaining consistent pressure during spraying. Replacing a worn or pitted upper valve seat restores pump efficiency, eliminates pressure loss, and ensures reliable operation.
| Part Number | 762-134 (Replaces Titan 509597) |
|---|---|
| Part Description | Upper Valve Seat |
| Brand | Titan |
| Fits | Airless Sprayer 330, 340, 440 XC, 440 I, 550 XC, 660 XC, 690 GXC, 640 I, 740 IX; Epic 447 HPX, 660 HPX, 690 HPG; Performer 640 I Airless Sprayer; Powrliner 3100; ProMark II; RentSpray 600, 700, RentSpray Plus |
| Condition | New |
The 762-134 Upper Valve Seat is a direct replacement for Titan part 509597. It is a precision‑machined component that, together with the ball, creates a one‑way seal in the pump’s fluid section. This seat ensures that material flows forward during the upstroke and does not backflow during the downstroke, maintaining steady pressure and preventing erratic spray patterns.
Over time, the upper valve seat can become worn, pitted, or grooved from abrasive coatings and constant cycling. A damaged seat allows fluid to leak back past the ball, resulting in pressure loss, surging, or complete loss of prime. Replacing the upper valve seat restores the pump’s ability to build and hold stall pressure, delivering consistent performance.
| Forms one‑way seal | Works with the ball to prevent backflow |
|---|---|
| Maintains pressure | Helps pump achieve and hold stall pressure |
| Ensures prime | Keeps fluid moving forward, reducing priming issues |
| Pressure loss | Pump cannot reach stall pressure or pressure drops under load |
|---|---|
| Difficult to prime | Sprayer struggles to draw fluid or loses prime repeatedly |
| Worn / pitted seat | Visible wear, grooves, or pitting on the sealing surface |
| During pump rebuild | Always replace when overhauling the fluid section |
762-134 replaces Titan 509597 and fits the following Titan sprayer models. Always confirm fitment using the correct parts diagram for your exact model and serial number.
| Models | Component |
|---|---|
| Airless Sprayer 330 | Upper Valve Seat |
| Airless Sprayer 340 | Upper Valve Seat |
| Airless Sprayer 440 XC | Upper Valve Seat |
| Airless Sprayer 440 I | Upper Valve Seat |
| Airless Sprayer 550 XC | Upper Valve Seat |
| Airless Sprayer 660 XC | Upper Valve Seat |
| Airless Sprayer 690 GXC | Upper Valve Seat |
| Airless Sprayer 640 I | Upper Valve Seat |
| Airless Sprayer 740 IX | Upper Valve Seat |
| Epic 447 HPX | Upper Valve Seat |
| Epic 660 HPX | Upper Valve Seat |
| Epic 690 HPG | Upper Valve Seat |
| Performer 640 I Airless Sprayer | Upper Valve Seat |
| Powrliner 3100 | Upper Valve Seat |
| ProMark II | Upper Valve Seat |
| RentSpray 600 | Upper Valve Seat |
| RentSpray 700 | Upper Valve Seat |
| RentSpray Plus | Upper Valve Seat |
When replacing the upper valve seat, these associated components are often inspected and replaced at the same time to ensure a complete repair.
The ball works with the seat to form the seal. Replace if worn, out‑of‑round, or pitted.
Both upper and lower seats should be inspected; wear often occurs simultaneously.
If the fluid section is being rebuilt, replace all packings and o‑rings.
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