Quick Take
Four industrial valves, four different jobs. The lineup ranges from a two-digit stainless steel ball valve to a four-digit control valve, and the right choice depends on what your process needs: automated positioning, manual shutoff, mixing, or a material-specific control valve. A digital positioner isn't interchangeable with a shutoff valve, and a 3-way mixing valve won't serve the same purpose as a small full-port ball valve. This guide matches each product to a specific function and points out condition and price differences.
Listed Price Comparison
| Product | Listed Price | Price Bar | At a Glance |
|---|---|---|---|
| SAMSON TROVIS 3730-3 HART Digital Valve Positioner | $899.00 | HART positioner for control valves | |
| ANIX 3/8-inch Full-Port Ball Valve | $23.98 | Compact full-port valve | |
| Powers Process 593WM150STMS46RS Flowrite II 3-Way Mixing | $1,220.98 | Three-way control valve | |
| Powers Process 593WM150STMS46RS Flowrite II Heavy Duty Bronze | $1,126.98 | Heavy-duty control valve |
Decision Matrix
- Digital positioning: Choose the SAMSON TROVIS 3730-3 if you need to add remote positioning to an air-operated valve. It does not include a valve body.
- Compact shutoff: Choose the ANIX 3/8-inch full-port ball valve for a threaded FNPT connection on a small line, with a new-valve condition and the lower listed price in this set.
- Flow blending: Choose the higher-priced Powers Process Flowrite II when the application calls for combining two flows into one.
- Body-material priority: Choose the lower-priced Powers Process Flowrite II when the body material is the priority.
Product Notes
SAMSON TROVIS 3730-3 HART Digital Valve Positioner 4-20mA NEW Open Box
The SAMSON TROVIS 3730-3 is the automation piece in this group. At $899.00, it accepts a 4-20 mA DC input and uses HART communication, which makes it a good fit for process-control loops that need remote valve positioning. The listing describes it as new open-box and never installed, and the suitable media is air for the air-operated valve setup. The main limitation is scope: this is a positioner, not a complete valve, so you need an air-operated valve/actuator to attach it to. It also doesn't serve as a shutdown valve on its own. If your control loop already has a valve body and you need to add or replace the positioning brain, this is the product for that job.
3/8-inch Ball Valve 2000 WOG Threaded FNPT Stainless Steel 316 FULL PORT
At $23.98, this ANIX ball valve is the practical shutoff option. Its 3/8-inch threaded FNPT ends and full-port design suit compact branch lines, and the 316 stainless steel body is listed for media including air, fuel, oil, wastewater, and water. This is the only valve in the set listed as condition New rather than Used or New - Open Box. The limitation is the 3/8-inch size: if your process requires a larger port, this won't handle the same flow. For a small instrument line, a drain leg, or a low-flow isolation point, it gives you a new shutoff valve with the lowest listed price in this comparison.
Powers Process 593WM150STMS46RS Flowrite II Control Valve 3-Way Mixing 1-1/2
The Powers Process 593WM150STMS46RS Flowrite II is a 3-way mixing valve with a 1-1/2-inch connection and a listed price of $1,220.98. It's designed for applications where you need to combine two incoming flows into one mixed outlet, rather than simply opening or closing a line. The item is listed as used. The main limitation is that the title emphasizes the mixing function rather than the body material, and the listed price is at the upper end of this four-product range. If you're replacing a Flowrite II mixing valve or building a mixing station, this model number directly addresses that function. If you only need a simple shutoff, this is more valve than the job requires.
Powers Process 593WM150STMS46RS Flowrite II Heavy Duty Bronze Control Valve 3-Wa
This second Powers Process Flowrite II valve is listed at $1,126.98 and carries the same 593WM150STMS46RS model number, but the title calls out Heavy Duty Bronze construction. That makes it the option with explicit bronze body wording, and it's listed at $94 less than the other Powers valve in this group. The main limitation is that it is listed as used. If heavy-duty bronze is what your system needs and you can work with a used unit, this is the more direct match for that material requirement.
Final Recommendation by Use Case
For an automation upgrade, choose the SAMSON TROVIS 3730-3 HART Digital Valve Positioner. For a small-line shutoff, the ANIX 3/8-inch ball valve is the straightforward pick. For flow blending, the Powers Process Flowrite II 3-Way Mixing valve handles that service. For a heavy-duty bronze control valve, the Powers Process Flowrite II Heavy Duty Bronze valve is the direct match.
