An industrial valve purchase usually comes down to three things: port configuration, condition, and how much you are willing to spend. The four options laid out here make that trade-off clear. One is an untested parts assembly; two are used three-way mixing Flowrite II control valves from Powers Process; and one is a new-open-box single-seat Flowrite II. They are not interchangeable, so the first step is to decide what the line actually needs.
Quick take
Pick the new Powers Process Flowrite II 593SS075SSCS460S single-seat valve when new condition matters. Choose the heavy-duty bronze 593WM150STMS46RS Flowrite II when your process calls for a three-way mixing valve with bronze construction. Select the standard 593WM150STMS46RS Flowrite II when the same mixing function is needed but heavy-duty bronze is not part of the spec. Buy the vintage pneumatic control valve assembly when you have a parts, repair, or restoration project and can work around unknown condition.
Listed price comparison
| Option | Listed price | Condition | Price position |
|---|---|---|---|
| Vintage Pneumatic Control Valve Assembly | $139.99 | For parts or not working | |
| Powers Flowrite II 593WM150STMS46RS | $1,220.98 | Used | |
| Powers Flowrite II Heavy Duty Bronze 593WM150STMS46RS | $1,126.98 | Used | |
| Powers Flowrite II Single Seat 593SS075SSCS460S | $2,595.00 | New - Open box |
Decision matrix
- For a single-seat application that calls for new condition, the Powers Flowrite II 593SS075SSCS460S is the direct match.
- For a mixing application that might require bronze material, the heavy-duty bronze 593WM150STMS46RS is the more specific choice.
- For the same mixing function without the heavy-duty material requirement, the standard 593WM150STMS46RS works instead.
- For a parts, repair, or restoration project, the vintage pneumatic control valve assembly is the only option priced for that purpose.
Product notes
UNTESTED AS IS Vintage Industrial Pneumatic Control Valve Assembly
Start with the lowest-priced entry in this group: an untested industrial pneumatic/mechanical control valve assembly. It is built from heavy metal and has separate pneumatic SUPPLY and OUT ports. It is offered as a parts, repair, or restoration item, with a condition of 'For parts or not working.' If you need a donor assembly or a starting point for rebuilding, the $139.99 price keeps the initial commitment low. The limitation is exactly what the product name says: the valve is untested, the manufacturer and model are unknown, and the operating condition and calibration have not been confirmed. Treat it as a project valve, not a drop-in control valve.
Powers Process 593WM150STMS46RS Flowrite II Control Valve 3-Way Mixing 1-1/2
This used Flowrite II is a 1-1/2-inch three-way mixing valve from Powers Process, with the model number matching the 593WM150STMS46RS designation. Because it carries a named Powers Process model, it is easier to cross-reference than the vintage assembly. At $1,220.98, it sits in the middle of the price spread. Choose this version when the application calls for a three-way mixing valve and heavy-duty bronze is not required. The main trade-off is condition: it is used, not new. You get the Flowrite II platform for less than the new single-seat valve, but you are buying used rather than new.
Powers Process 593WM150STMS46RS Flowrite II Heavy Duty Bronze Control Valve 3-Way Mixing 1-1/2
The heavy-duty bronze alternative is the same model family at $1,126.98. Its product name adds 'Heavy Duty Bronze' to the 593WM150STMS46RS designation and the same 1-1/2-inch three-way mixing configuration. That makes it the more specific choice when bronze material matters in the specification. It is also the lower-priced of the two used Flowrite II valves. The trade-off is shared with the previous option: it is used, so you are not getting new-condition packaging. If bronze is part of the requirement, this valve points you in the right direction.
NEW Powers Process 593SS075SSCS460S Flowrite II Control Valve Single Seat 3/4
The only new-condition option in this group is the Powers Process Flowrite II 593SS075SSCS460S, a 3/4-inch single-seat valve at $2,595. It carries a New - Open box condition and includes a 30-day guarantee. If your job calls for a single-seat Flowrite II and you want new condition, this is the straightforward match. It is also the highest-priced item in the group by a wide margin. The caveats are the price and the configuration: it is not a three-way mixing valve, so it only fits applications that can use a single-seat body.
Final recommendation by use case
If the line needs a single-seat valve with new condition, the new Flowrite II 593SS075SSCS460S is the one to choose. If the line needs a mixing valve and bronze is part of the spec, the heavy-duty bronze 593WM150STMS46RS is the better fit. If the same mixing function is needed without the bronze requirement, the standard 593WM150STMS46RS covers it. If the goal is a parts, repair, or restoration project, the vintage pneumatic control valve assembly is the entry point.
