Choosing between two ball valves for an industrial line usually comes down to three practical questions: what size pipe you are fitting, what fluid you are controlling, and how the valve connects to your existing piping. The two valves here answer those questions very differently. At one end is a 2-inch, 316 stainless steel triclamp valve priced at $150; at the other is a 3/4-inch carbon-steel FPT valve priced at $39. There is a $111 gap between those two listed prices, and the right side of that gap depends on where the valve is going.
Quick verdict
Pick the QSM TRU-FLO if your line is built around 2-inch sanitary clamp or triclamp connections and you need a larger manual valve. Pick the FNW Fig 321A if you are working with 3/4-inch threaded pipe, need a compact manual shutoff, and want the lower listed price.
Comparison at a glance
| Option | Listed price | Price bar | Key specs |
|---|---|---|---|
| QSM TRU-FLO 2" 316 SST Triclamp | $150 | 2 in, 316 stainless steel, triclamp/sanitary clamp ends, manual, 1000 WOG | |
| FNW Fig 321A 3/4" carbon steel | $39 | 3/4 in, carbon steel, FPT, 3-piece, manual, marked 150 WSP |
Where each valve wins
- Size and connection: The QSM TRU-FLO wins for a 2-inch clamp-based line; the FNW wins for a 3/4-inch threaded installation.
- Flow capacity: The 2-inch port handles larger volumes; the 3/4-inch port is better suited to smaller branch lines.
- Material: 316 stainless steel fits sanitary clamp service; carbon steel is the lower-cost body choice.
- Price: The FNW is the lower-priced option; the QSM TRU-FLO is the higher-priced option. The gap is the tradeoff for the larger size and stainless construction.
Product notes
QSM TRU-FLO 2" Stainless Steel Ball Valve
New, unopened, and made from 316 stainless steel, this valve is built for systems that use triclamp or sanitary clamp ends. The 2-inch opening gives it room to move higher volumes, and it carries a 1000 WOG rating. If your line is already set up with 2-inch clamp connections, this valve matches your fittings directly. The tradeoff is the listed price: with a larger bore and stainless steel construction, it is the costlier option in this pair, so it is the better match only if your line actually needs that size and material.
FNW Fig 321A 3/4" Carbon Steel Ball Valve
The lower-priced option in this pair, this valve has a 3/4-inch body, FPT connections, and a 3-piece design that makes it a conventional fit for threaded industrial piping. Construction is carbon steel, the handle is manual, and the pressure marking is 150 WSP. For a compact water line, that package is practical. The caveat is condition: the FNW shows cosmetic wear and scratches from previous storage, and the seller states it has not been pressure-tested. That makes the FNW a sensible option when you expect visible handling marks and want the lower listed price; the QSM TRU-FLO is the cleaner, larger option.
Final choice by use case
Choose the QSM TRU-FLO when you are fitting a 2-inch triclamp or sanitary clamp line and need a manual valve. Choose the FNW Fig 321A when you need a 3/4-inch threaded water valve and want the lower-priced option.
